阅读说明：本技术 一种高性能铜合金带材在线固溶热处理工艺 (online solution heat treatment process for high-performance copper alloy strip ) 是由 谯光辉 刘洪昌 赵国天 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种高性能铜合金带材在线固溶热处理工艺,该工艺基于铜合金带材在线固溶热处理装置,将铜合金带材从卷材展开进行加热、保温、风冷冷却、板型校正等工艺操作,实现了铜合金带材连续在线固溶处理；该工艺具有以下五个优点：一、铜合金带材送进速度与同步滚轴密封门、收卷同步张紧轮转速同步,防止铜合金带材表面划伤；二、采用还原性气体保护,防止了带材表面的氧化；三、带材分段加热、逐步升温、温度均匀,冷却处理时带材表面为自由状态,因此残余内应力小；四、采用炉前S辊装置、中间多组夹辊及炉后S辊装置校正铜合金带材板型,使成品板型平整；五、具有冷却均匀、速度快的特点,铜合金带材成品具有极高的机械性能及一致性。(the invention discloses a high-performance copper alloy strip online solution heat treatment process, which is based on a copper alloy strip online solution heat treatment device, and is used for unfolding a copper alloy strip from a coiled material to carry out the process operations of heating, heat preservation, air cooling, plate shape correction and the like, so that the continuous online solution treatment of the copper alloy strip is realized; the process has the following five advantages: the feeding speed of the copper alloy strip is synchronous with the rotating speeds of the synchronous roller sealing door and the synchronous take-up pulley, so that the surface of the copper alloy strip is prevented from being scratched; secondly, the surface of the strip is prevented from being oxidized by adopting the protection of reducing gas; thirdly, the strip is heated in sections, the temperature is gradually raised, the temperature is uniform, and the surface of the strip is in a free state during cooling treatment, so that the residual internal stress is small; fourthly, correcting the plate shape of the copper alloy strip by adopting a furnace front S-roller device, a plurality of groups of intermediate clamping rollers and a furnace rear S-roller device to ensure that the plate shape of a finished product is flat; fifthly, the cooling is uniform, the speed is high, and the finished product of the copper alloy strip has extremely high mechanical performance and consistency.)

1. An on-line solution heat treatment process for a high-performance copper alloy strip is characterized by comprising the following steps of: the high-performance copper alloy strip online solution heat treatment device is adopted and comprises an uncoiler (1), a furnace front shearing device (2), an alloy strip welding device (3), a furnace front S roller device (4), a preheating furnace (5), a heating and heat-preserving furnace (6), a cooling furnace (7), a furnace rear S roller device (8), a passivation flushing device (9), a drying device (10), a furnace rear shearing device (11) and a coiling machine (12), wherein the devices are sequentially aligned and fixedly arranged from left to right according to the central line of the devices; the device is characterized in that the device is arranged between an uncoiler (1) and a furnace front shearing device (2), between an alloy strip welding device (3) and a furnace front S roller device (4), between the furnace front S roller device (4) and a preheating furnace (5), between a cooling furnace (7) and a furnace rear S roller device (8), between the furnace rear S roller device (8) and a passivation flushing device (9), between the passivation flushing device (9) and a drying device (10), between the drying device (10) and a furnace rear shearing device (11), and between the furnace rear shearing device (11) and a coiling machine (12) in a separated mode, and fixed distances are arranged between the uncoiler and the furnace front shearing device respectively; the furnace front shearing device (2) is fixedly connected with the alloy strip welding device (3) through a base; the preheating furnace (5), the heating and heat-preserving furnace (6) and the cooling furnace (7) are fixedly and hermetically connected; the stokehole shearing device (2) is movably provided with a head end upper traction roller (2012); a tension roller (404) is arranged on the front S roller device (4); the preheating furnace (5) is provided with an inlet end sealing door (502), an inlet end corona generator (503) and a tail gas discharge port (505); seven groups of resistance heating belts (602) are arranged in the heating and heat-preserving furnace (6); an air cooler (702), an outlet end sealing door (704) and an outlet end corona generator (705) are arranged on the cooling furnace (7); the furnace rear shearing device (11) is movably provided with a tail end upper traction roller (1122); a winding synchronous tensioning wheel device (122) is movably arranged on the winding machine (12); based on the copper alloy strip online solution heat treatment device, the high-performance copper alloy strip online solution heat treatment process has the following specific flow:

S1, threading: opening an inlet end sealing door (502) of the preheating furnace (5) and an outlet end sealing door (704) of the cooling furnace (7); lifting an upper traction roller (2012) at the head end of the stokehole shearing device (2) and an upper traction roller (1122) at the tail end of the stokehole shearing device (11); arranging a traction belt coiled material on an uncoiler (1); the method comprises the following steps of shearing a traction belt head in order by a front shearing device (2), sequentially passing the traction belt head through a welding device (3), a front S-roller device (4), a preheating furnace (5), a heating and heat-preserving furnace (6), a cooling furnace (7), a rear S-roller device (8), a passivation flushing device (9), a drying device (10) and a rear shearing device (11), and finally fixing the traction belt head on a winding machine (12); adjusting the central line of the traction belt to align with the middle shaft of the production line; pressing down an upper traction roller (2012) at the head end of the stokehole shearing device (2) and an upper traction roller (1122) at the tail end of the stokehole shearing device (11); closing an inlet end sealing door (502) of the preheating furnace (5) and an outlet end sealing door (704) of the cooling furnace (7); shearing the traction belt by using a furnace front shearing device (2), and adjusting the tail position of the traction belt to an alloy belt welding device (3) in a slow traction manner; unloading the coiled material of the traction belt from the uncoiler (1), replacing the coiled material of the copper alloy, shearing the head of the coiled material of the copper alloy by a furnace front shearing device (2), aligning the tail of the traction belt with the head of the coiled material of the copper alloy on an alloy belt welding device (3), and fixedly connecting the tail of the traction belt with the head of the coiled material of the copper alloy by welding; adjusting the tension of a tension roller (404) of the S roller device (4) in front of the furnace and the tension of a winding synchronous tension wheel device (122) of a winding machine (12); the head of the copper alloy coiled material is fixed on a winding machine (12) in a slow traction mode, and the feeding of the copper alloy coiled material is stopped;

s2, replacing safety gas in the furnace: feeding nitrogen into the preheating furnace (5), the heating and heat-preserving furnace (6) and the cooling furnace (7) according to the process set flow through an air cooler (702) of the cooling furnace (7), and finally discharging the nitrogen through a tail gas discharge port (505) of the preheating furnace (5); when the oxygen content in the furnace is smaller than the process requirement value and the replacement time is longer than the process requirement time, finishing the safe gas replacement in the furnace;

S3, cooling and protecting gas replacement; feeding mixed gas of nitrogen and hydrogen into the preheating furnace (5), the heating and heat-preserving furnace (6) and the cooling furnace (7) according to the process set flow through an air cooler (702) of the cooling furnace (7), and continuously setting electric spark ignition at a tail gas discharge port (505) until tail gas discharged from the tail gas discharge port (505) is stably ignited; the cooling protective gas replacement time needs to meet the requirement of the process setting time;

S4, heating and temperature rising: seven groups of resistance heating belts (602) of the heating holding furnace (6) are electrified and heated according to the set current of the process; starting an inlet end corona generator (503) of the preheating furnace (5) and an outlet end corona generator (705) of the cooling furnace (7); when the temperature of each section of the heating holding furnace (6) reaches the process set preheating temperature, the process set time is continued, then the working current of the seven groups of resistance heating belts (602) is increased to the normal working process set current, and after the temperature of each section of the heating holding furnace (6) reaches the process set working value and is kept stable, the heating holding furnace enters the normal working state;

s5, online processing: increasing the supply of cooling protective gas according to the process requirement flow; starting the high-performance copper alloy strip online solution heat treatment device to automatically operate, so that the copper alloy coiled material is gradually fed in at an accelerated speed, finally the feeding speed meets the technological requirement, and the copper alloy coiled material enters a normal working state; the temperature of the copper alloy strip after being cooled by the cooling furnace (7) is lower than the set temperature of the process;

s6, finishing production: after the production of the online solution heat treatment of the copper alloy strip is finished, cutting off the current of seven groups of resistance heating belts (602) of the heating and heat-preserving furnace (6); closing the high-performance copper alloy strip online solution heat treatment device to automatically operate; plugging an inlet end sealing door (502) and an outlet end sealing door (704) by wool felt; reducing the flow of cooling protective gas according to the process setting requirement; the belt tail of the copper alloy coiled material is cut off by the post-furnace shearing device (11), the copper alloy coiled material is coiled by the coiling machine (12), and the belt tail of the copper alloy coiled material is fixed by an adhesive tape; when the temperature of the heating and heat-preserving furnace (6) is reduced to the process set temperature, an air cooler (702) of the cooling furnace (7) is replaced by nitrogen, the gas in the furnace is replaced according to the process set flow, and the replacement time is longer than the process required value; and when the temperature of each section of the heating and heat-preserving furnace (6) is continuously reduced to the set process temperature, closing the air cooler (702) of the cooling furnace (7).

2. The high performance copper alloy strip in-line solution heat treatment process of claim 1, wherein: and the tail of the traction belt is welded with the head of the copper alloy coiled material by argon arc welding hole welding.

3. the high performance copper alloy strip in-line solution heat treatment process of claim 1, wherein: and during the safe gas replacement operation in the furnace, the flow requirement is 5-6 m3/h, the oxygen content is less than 1%, and the duration is more than 3 hours.

4. The high performance copper alloy strip in-line solution heat treatment process of claim 1, wherein: the volume ratio of nitrogen to hydrogen in the cooling protective gas is 75:25, the concentration of residual oxygen is less than 2ppm, and the dew point temperature after purification is-65 ℃.

5. the high performance copper alloy strip in-line solution heat treatment process of claim 1, wherein: and when the cooling protective gas is replaced, the flow rate is required to be 25-28 m3/h, and the duration is longer than 30 minutes.

6. the high performance copper alloy strip in-line solution heat treatment process of claim 1, wherein: when heating and temperature rising work is carried out, the heating and heat preserving furnace (6) is from the feed end to the discharge end, the preheating temperature of each section is respectively 200 ℃, 400 ℃, 600 ℃, 700 ℃ and 700 ℃, and the continuous holding time is 2 hours after the temperature of each section reaches the preheating temperature; the working temperature values of each section of the heating and heat-preserving furnace (6) are respectively 250 ℃, 450 ℃, 650 ℃, 750-900 ℃ and 750-900 ℃.

7. The high performance copper alloy strip in-line solution heat treatment process of claim 1, wherein: during normal production, the supply flow rate of the cooling protective gas is 28-30 m 3/h; the final process requirement feeding speed of the copper alloy coiled material is 4-27 m/min; the temperature of the cooled copper alloy strip is lower than 65 ℃.

8. The high performance copper alloy strip in-line solution heat treatment process of claim 1, wherein: after the production is finished, the supply amount of the cooling protective gas is reduced to 5-6 m 3/h; when the cooling protective gas is replaced by nitrogen, the temperature in the heating holding furnace (6) is required to be lower than 550 ℃; and when the temperature in the heating holding furnace (6) is lower than 300 ℃, the air cooler (702) is closed.

Technical Field

the invention relates to the technical field of copper alloy strip solution heat treatment production, in particular to a high-performance copper alloy strip online solution heat treatment process.

Background

At present, the copper alloy strip solution heat treatment mainly adopts a pit furnace or a bell-type furnace for heating and heat preservation, and then is lifted out for water-cooling quenching; solution treatment of copper alloy strip using this process has a number of drawbacks: firstly, scratching the surface: the copper alloy strip is subjected to solution treatment by adopting a pit furnace or a bell-type furnace, repeated hoisting is needed, and relative sliding can occur between layers of copper strip coiled materials in the hoisting process, so that the surface of the copper alloy strip is scratched; secondly, oxidation exists on the surface: the copper strip coiled material is heated by adopting a pit furnace or a bell-type furnace, and is lifted out of the pit furnace or the bell-type furnace during quenching, the copper strip coiled material is exposed in the air, and is simultaneously quenched in water, and the surface of the copper alloy strip is oxidized in the process, so that the subsequent pickling and passivation treatment are required, the production cost is increased, and the serious environmental pollution is caused; thirdly, existence of internal stress: the copper alloy strip is subjected to solution treatment by adopting a pit furnace or a bell-type furnace, the copper alloy strip is in a coil shape, and the interior stress generated during quenching cannot be released, so that the internal stress is relatively large after the solution treatment, and when the copper alloy strip is used for stamping production of precision parts such as lead frames and the like, the lead frames are relatively large in distortion and deformation, so that the lead frames cannot be used; fourthly, the mechanical property is poor: the copper alloy strip is subjected to solution treatment by adopting a pit furnace or a bell-type furnace, the internal and external heating and heat preservation time of the copper strip coiled material is inconsistent during heating, the internal and external cooling speed of the copper strip coiled material is inconsistent during quenching, and the cooling time is longer, so that the high-performance copper alloy strip cannot be obtained.

Disclosure of Invention

In order to overcome the defects in the background art, the invention discloses a high-performance copper alloy strip online solution heat treatment process, which is based on a copper alloy strip online solution heat treatment device, and is used for unfolding a copper strip coiled material to perform the process operations of heating, heat preservation, air cooling, plate shape correction and the like, so that the continuous online solution treatment of the copper alloy strip is realized; the process has the following five advantages: the on-line solid solution heat treatment device adopts a synchronous roller sealing door and a winding synchronous tensioning wheel device, so that the feeding speed of the copper alloy strip is ensured to be synchronous with the rotating speeds of the synchronous roller sealing door and the winding synchronous tensioning wheel, and the problems of surface scratching and winding tightness of the copper alloy strip are prevented; secondly, reducing gas protection is adopted in the solution heat treatment process to carry out reduction brightening treatment on the surface of the copper alloy strip, so that the oxidation of the surface of the strip is prevented; thirdly, adopting on-line solution heat treatment, gradually raising the temperature of the strip in sections, and enabling the temperature to be uniform, wherein the surface of the strip is in a free state during cooling treatment, so that the residual internal stress after treatment is small; fourthly, correcting the plate shape of the copper alloy strip by adopting an S roller device in front of the furnace, a plurality of groups of clamping rollers in the middle and an S roller device behind the furnace in the online solution heat treatment device to enable the plate shape of a finished copper alloy strip to be flat; and fifthly, the gas containing hydrogen is used for air cooling, and the cooling speed is high, and the cooling is uniform, so that the finished copper alloy strip has extremely high mechanical properties and consistency.

In order to realize the purpose, the invention adopts the following technical scheme: 1. a high-performance copper alloy strip online solution heat treatment process adopts a high-performance copper alloy strip online solution heat treatment device, the treatment device comprises an uncoiler, a furnace front shearing device, an alloy strip welding device, a furnace front S roller device, a preheating furnace, a heating and heat-preserving furnace, a cooling furnace, a furnace rear S roller device, a passivation flushing device, a drying device, a furnace rear shearing device and a coiling machine, and the above devices are sequentially fixedly arranged from left to right in an aligned manner according to the central line of the device; the device comprises an uncoiler, an alloy strip welding device, a furnace front S roller device, a preheating furnace, a cooling furnace and a furnace rear S roller device, a furnace rear S roller device and a passivation flushing device, a passivation flushing device and a drying device, a drying device and a furnace rear shearing device, a furnace rear shearing device and a coiling machine which are arranged in a separated mode, and fixed distances are arranged between the uncoiler and the furnace front shearing device, between the alloy strip welding device and the furnace front S roller device, between the furnace front S roller device and the preheating furnace, between the cooling furnace and the furnace rear; the furnace front shearing device is fixedly connected with the alloy strip welding device through a base; the preheating furnace, the heating and heat-preserving furnace and the cooling furnace are fixedly and hermetically connected; the furnace front shearing device is movably provided with a head end upper traction roller; a tension roller is arranged on the front S roller device; the preheating furnace is provided with an inlet end sealing door, an inlet end corona generator and a tail gas discharge port; seven groups of resistance heating belts are arranged in the heating and heat-preserving furnace; an air cooler, an outlet end sealing door and an outlet end corona generator are arranged on the cooling furnace; the furnace rear shearing device is movably provided with a tail end upper traction roller; a winding synchronous tensioning wheel device is movably arranged on the winding machine; based on the copper alloy strip online solution heat treatment device, the high-performance copper alloy strip online solution heat treatment process has the following specific flow:

S1, threading: opening an inlet end sealing door of the preheating furnace and an outlet end sealing door of the cooling furnace; lifting an upper traction roller at the head end of the front shearing device and an upper traction roller at the tail end of the rear shearing device; arranging a traction belt coiled material on an uncoiler; shearing a traction belt head in order by using a stokehole shearing device, then sequentially passing the traction belt head through a welding device, a stokehole S-roller device, a preheating furnace, a heating and heat-preserving furnace, a cooling furnace, a furnace rear S-roller device, a passivation flushing device, a drying device and a furnace rear shearing device, and finally fixing the traction belt head on a winding machine; adjusting the central line of the traction belt to align with the middle shaft of the production line; pressing down an upper traction roller at the head end of the shearing device in front of the furnace and an upper traction roller at the tail end of the shearing device behind the furnace; closing an inlet end sealing door of the preheating furnace and an outlet end sealing door of the cooling furnace; shearing the traction belt by using a furnace front shearing device, and adjusting the tail position of the traction belt to the alloy belt welding device in a slow traction manner; the method comprises the following steps of (1) unloading a traction belt coiled material from an uncoiler, replacing a copper alloy coiled material, shearing a belt head of the copper alloy coiled material orderly by using a furnace front shearing device, aligning a belt tail of the traction belt with the belt head of the copper alloy coiled material on an alloy belt welding device, and fixedly connecting the belt tail of the traction belt with the belt head of the copper alloy coiled material by welding; adjusting the tension of a tension roller of the S roller device in front of the furnace and the tension of a winding synchronous tension pulley device of the winding machine; the head of the copper alloy coiled material is fixed on a winding machine in a slow traction mode, and the feeding of the copper alloy coiled material is stopped;

s2, replacing safety gas in the furnace: feeding nitrogen into the preheating furnace, the heating holding furnace and the cooling furnace according to the process set flow through an air cooler of the cooling furnace, and finally discharging the nitrogen through a tail gas discharge port of the preheating furnace; when the oxygen content in the furnace is less than the set value and the replacement time is more than the set value, the replacement of the safety gas in the furnace is finished;

S3, cooling and protecting gas replacement; feeding nitrogen and hydrogen mixed gas into the preheating furnace, the heating and heat preserving furnace and the cooling furnace according to the process set flow through an air cooler of the cooling furnace, and continuously setting electric spark ignition at a tail gas discharge port until tail gas discharged from the tail gas discharge port is stably ignited; the cooling protective gas replacement time needs to meet the requirement of the process setting time;

S4, heating and temperature rising: seven groups of resistance heating belts of the heating and heat-preserving furnace are electrified and heated according to the set current of the process; starting an inlet end corona generator of the preheating furnace and an outlet end corona generator of the cooling furnace; when the temperature of each section of the heating holding furnace reaches the process set preheating temperature, continuing the process set time, then increasing the working current of the seven groups of resistance heating belts to the normal working process set current, and entering a normal working state after the temperature of each section of the heating holding furnace reaches the process set working value and is kept stable;

S5, online processing: increasing the supply of cooling protective gas according to the process requirement flow; starting the high-performance copper alloy strip online solution heat treatment device to automatically operate, so that the copper alloy coiled material is gradually fed in at an accelerated speed, finally the feeding speed meets the technological requirement, and the copper alloy coiled material enters a normal working state; and the temperature of the copper alloy strip after being cooled by the cooling furnace is lower than the set temperature of the process.

S6, finishing production: cutting off seven groups of resistance heating belt currents of the heating and heat-preserving furnace after the online solution heat treatment production of the copper alloy strip is finished; closing the high-performance copper alloy strip online solution heat treatment device to automatically operate; plugging an inlet end sealing door and an outlet end sealing door by wool felt; reducing the flow of cooling protective gas according to the process setting requirement; the belt tail of the copper alloy coiled material is cut off by a shearing device behind the furnace, the copper alloy coiled material is coiled by a coiling machine, and the belt tail of the copper alloy coiled material is fixed by an adhesive tape; when the temperature of the heating holding furnace is reduced to the process set temperature, replacing an air cooler of the cooling furnace with nitrogen, replacing the gas in the furnace according to the process set flow, wherein the replacement time is longer than the process required value; and when the temperature of each section of the heating and heat-preserving furnace is continuously reduced to the set process temperature, closing the air cooler of the cooling furnace.

further, the tail of the traction belt and the head of the copper alloy coiled material are welded by argon arc welding hole welding.

Furthermore, during the safe gas replacement operation in the furnace, the flow requirement is 5-6 m3/h, the oxygen content is less than 1%, and the duration is more than 3 hours.

further, the volume ratio of nitrogen to hydrogen in the cooling protective gas is 75:25, the residual oxygen concentration is less than 2ppm, and the dew point after purification is-65 ℃.

Furthermore, during cooling protective gas replacement operation, the flow rate is required to be 25-28 m3/h, and the duration is longer than 30 minutes.

further, during heating and temperature rising operation, the preheating temperature of each section is respectively 200 ℃, 400 ℃, 600 ℃, 700 ℃ and 700 ℃ from the feed end to the discharge end of the heating and heat preserving furnace, and the continuous holding time is 2 hours after the temperature of each section reaches the preheating temperature; the working temperature values of each section of the heating and heat-preserving furnace are respectively 250 ℃, 450 ℃, 650 ℃, 750-900 ℃ and 750-900 ℃.

Furthermore, during normal production, the supply flow rate of the cooling protective gas is 28-30 m 3/h; the final process requirement feeding speed of the copper alloy coiled material is 4-27 m/min; the temperature of the cooled copper alloy strip is lower than 65 ℃.

Further, after production is finished, the supply amount of cooling protective gas is reduced to 5-6 m 3/h; when the cooling protective gas is replaced by nitrogen, the temperature in the heating and heat-preserving furnace needs to be lower than 550 ℃; and when the temperature in the heating and heat-preserving furnace is lower than 300 ℃, the air cooler is turned off.

Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a high-performance copper alloy strip online solution heat treatment process, which is based on a copper alloy strip online solution heat treatment device, and is used for unfolding a copper strip coiled material to perform process operations such as heating, heat preservation, air cooling, plate shape correction and the like, so that continuous online solution treatment of the copper alloy strip is realized; the process has the following five advantages: the on-line solid solution heat treatment device adopts a synchronous roller sealing door and a winding synchronous tensioning wheel device, so that the feeding speed of the copper alloy strip is ensured to be synchronous with the rotating speeds of the synchronous roller sealing door and the winding synchronous tensioning wheel, and the problems of surface scratching and winding tightness of the copper alloy strip are prevented; secondly, reducing gas protection is adopted in the solution heat treatment process to carry out reduction brightening treatment on the surface of the copper alloy strip, so that the oxidation of the surface of the strip is prevented; thirdly, adopting on-line solution heat treatment, gradually raising the temperature of the strip in sections, and enabling the temperature to be uniform, wherein the surface of the strip is in a free state during cooling treatment, so that the residual internal stress after treatment is small; fourthly, correcting the plate shape of the copper alloy strip by adopting an S roller device in front of the furnace, a plurality of groups of clamping rollers in the middle and an S roller device behind the furnace in the online solution heat treatment device to enable the plate shape of a finished copper alloy strip to be flat; and fifthly, the gas containing hydrogen is used for air cooling, and the cooling speed is high, and the cooling is uniform, so that the finished copper alloy strip has extremely high mechanical properties and consistency.

Drawings

FIG. 1 is a schematic structural view A of an on-line solution heat treatment device for a high-performance copper alloy strip;

FIG. 2 is a schematic structural view B of an on-line solution heat treatment device for a high-performance copper alloy strip;

FIG. 3 is a schematic structural view C of an on-line solution heat treatment device for high-performance copper alloy strips.

In the figure: 1. an uncoiler; 2. a stokehole shearing device; 2012. the head end is provided with a traction roller; 3. an alloy strip welding device; 4. a stokehold S-roll device; 404. a tension roller; 5. preheating a furnace; 502. an inlet end sealing door; 503. an inlet-end corona generator; 505. a tail gas discharge port; 6. heating a bag holding furnace; 602. a resistance heating zone; 7. cooling the furnace; 702. an air cooler; 704. an outlet end sealing door; 705. an outlet end corona generator; 8. a furnace rear S-roll device; 9. a passivation flushing device; 10. a drying device; 11. a furnace rear shearing device; 1122. a traction roller is arranged at the tail end; 12. a winding machine; 122. synchronous take-up pulley device of rolling.

Detailed Description

the present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.

A high-performance copper alloy strip online solution heat treatment process adopts a high-performance copper alloy strip online solution heat treatment device, the treatment device comprises an uncoiler 1, a furnace front shearing device 2, an alloy strip welding device 3, a furnace front S roller device 4, a preheating furnace 5, a heating and heat-preserving furnace 6, a cooling furnace 7, a furnace rear S roller device 8, a passivation flushing device 9, a drying device 10, a furnace rear shearing device 11 and a coiling machine 12, and the above devices are sequentially aligned and fixedly arranged from left to right according to the central line of the device; the device is characterized in that the device is arranged between the uncoiler 1 and the front shearing device 2, between the alloy strip welding device 3 and the front S roller device 4, between the front S roller device 4 and the preheating furnace 5, between the cooling furnace 7 and the rear S roller device 8, between the rear S roller device 8 and the passivation flushing device 9, between the passivation flushing device 9 and the drying device 10, between the drying device 10 and the rear shearing device 11, and between the rear shearing device 11 and the coiling machine 12 in a separated mode, and fixed distances are respectively arranged between every two devices; the furnace front shearing device 2 is fixedly connected with the alloy strip welding device 3 through a base; the preheating furnace 5, the heating and heat-preserving furnace 6 and the cooling furnace 7 are fixedly and hermetically connected; the stokehole shearing device 2 is movably provided with a head end upper traction roller 2012; a tension roller 404 is arranged on the front S roller device 4; the preheating furnace 5 is provided with an inlet end sealing door 502, an inlet end corona generator 503 and a tail gas discharge port 505; seven groups of resistance heating belts 602 are arranged in the heating holding furnace 6; an air cooler 702, an outlet end sealing door 704 and an outlet end corona generator 705 are arranged on the cooling furnace 7; the furnace rear shearing device 11 is movably provided with a tail end upper traction roller 1122; a winding synchronous tensioning wheel device 122 is movably arranged on the winding machine 12; based on the copper alloy strip online solution heat treatment device, the high-performance copper alloy strip online solution heat treatment process has the following specific flow:

s1, threading: opening an inlet end sealing door 502 of the preheating furnace 5 and an outlet end sealing door 704 of the cooling furnace 7; raising the upper pull rolls 2012 at the head end of the stokehole shearing device 2 and the upper pull rolls 1122 at the tail end of the stokehole shearing device 11; arranging a traction belt coiled material on an uncoiler 1; the belt head of the traction belt is sheared orderly by a stokehole shearing device 2, then the belt head of the traction belt is manually pulled to sequentially pass through a welding device 3, a stokehole S roller device 4, a preheating furnace 5, a heating and heat-preserving furnace 6, a cooling furnace 7, a furnace rear S roller device 8, a passivation flushing device 9, a drying device 10 and a furnace rear shearing device 11, and finally the belt head of the traction belt is fixed on a winding machine 12; adjusting the central line of the traction belt to align with the middle shaft of the production line; pressing down an upper pull roll 2012 at the head end of the stokehole shearing device 2 and an upper pull roll 1122 at the tail end of the stokehole shearing device 11; closing an inlet end sealing door 502 of the preheating furnace 5 and an outlet end sealing door 704 of the cooling furnace 7; shearing the traction belt by using a stokehold shearing device 2, and adjusting the tail position of the traction belt to an alloy belt welding device 3 at the speed of 1 m/min; unloading the coiled material of the traction belt from the uncoiler 1, replacing the coiled material of the copper alloy, shearing the belt head of the coiled material of the copper alloy orderly by using a furnace front shearing device 2, manually aligning the belt tail of the traction belt with the belt head of the coiled material of the copper alloy on an alloy belt welding device 3, and fixedly connecting the belt tail of the traction belt with the belt head of the coiled material of the copper alloy through argon arc welding hole welding; adjusting the tension of the tension roller 404 of the stokehole S roller device 4 and the winding synchronous tension roller device 122 of the winding machine 12; the head of the copper alloy coiled material is fixed on the winding machine 12 in a traction way at the speed of 1m/min, and the feeding of the copper alloy coiled material is stopped;

S2, replacing safety gas in the furnace: feeding nitrogen into the preheating furnace 5, the heating and heat-preserving furnace 6 and the cooling furnace 7 at a flow rate of 5-6 m3/h through an air cooler 702 of the cooling furnace 7, and finally discharging the nitrogen through a tail gas discharge port 505 of the preheating furnace 5; when the oxygen content in the furnace is less than 1 percent and the replacement time is more than 3 hours, the safe gas replacement in the furnace is finished;

S3, cooling and protecting gas replacement; feeding mixed gas of nitrogen and hydrogen into the preheating furnace 5, the heating and heat-preserving furnace 6 and the cooling furnace 7 through an air cooler 702 of the cooling furnace 7 at a flow rate of 25-28 m3/h, wherein the volume ratio of the nitrogen to the hydrogen is 75:25, the residual oxygen concentration is less than 2ppm, and the dew point temperature after purification is-65 ℃; meanwhile, the tail gas discharge port 505 is continuously provided with electric spark ignition until tail gas discharged from the tail gas discharge port 505 is stably ignited; the cooling protective gas replacement time is more than 30 minutes;

S4, heating and temperature rising: seven groups of resistance heating belts 602 of the heating holding furnace 6 are electrified and heated according to the set current of the process; starting an inlet end corona generator 503 of the preheating furnace 5 and an outlet end corona generator 705 of the cooling furnace 7; when the temperature of each section of the heating holding furnace 6 reaches 200 ℃, 400 ℃, 600 ℃, 700 ℃ and 700 ℃, keeping for 2 hours, and then increasing the working current of the seven groups of resistance heating belts 602 to the set current of the normal working process; after the temperature of each section of the heating holding furnace 6 reaches 250 ℃, 450 ℃, 650 ℃, 750-900 ℃ and 750-900 ℃ respectively and keeps stable, entering a normal working state;

S5, online processing: cooling the protective gas supply to 28-30 m3/h according to the process requirement; starting the high-performance copper alloy strip online solution heat treatment device to automatically operate, and gradually feeding the copper alloy coiled material at an accelerated speed to finally reach 4-27 m/min; the temperature of the copper alloy strip after being cooled by the cooling furnace 7 is lower than 65 ℃.

s6, finishing production: after the production of the online solution heat treatment of the copper alloy strip is finished, cutting off the current of seven groups of resistance heating belts 602 of the heating and heat-preserving furnace 6; closing the high-performance copper alloy strip online solution heat treatment device to automatically operate; plugging an inlet end sealing door 502 and an outlet end sealing door 704 by wool felt; the supply amount of the cooling protective gas is reduced to 5-6 m 3/h; the belt tail of the copper alloy coiled material is cut off by the post-furnace shearing device 11, the copper alloy coiled material is coiled by the coiling machine 12, and the tail end of the copper alloy coiled material is fixed by an adhesive tape; and when the temperature of the heating holding furnace 6 is reduced to below 550 ℃, replacing the air cooler 702 passing through the cooling furnace 7 with nitrogen gas with the nitrogen flow of 2m3/h, continuing the replacement time until the temperature of each section of the heating holding furnace 6 is reduced to below 300 ℃, and turning off the air cooler 702 of the cooling furnace 7.

taking a beryllium bronze alloy strip with the brand number of TBe2 as an example, the specific flow of the online solution heat treatment process is as follows:

The trade mark is as follows: TBe2, thickness: 0.05mm, width: 420mm

S1, threading: opening an inlet end sealing door 502 of the preheating furnace 5 and an outlet end sealing door 704 of the cooling furnace 7; raising the upper pull rolls 2012 at the head end of the stokehole shearing device 2 and the upper pull rolls 1122 at the tail end of the stokehole shearing device 11; arranging a traction belt coiled material on an uncoiler 1; the belt head of the traction belt is sheared orderly by a stokehole shearing device 2, then the belt head of the traction belt is manually pulled to sequentially pass through a welding device 3, a stokehole S roller device 4, a preheating furnace 5, a heating and heat-preserving furnace 6, a cooling furnace 7, a furnace rear S roller device 8, a passivation flushing device 9, a drying device 10 and a furnace rear shearing device 11, and finally the belt head of the traction belt is fixed on a winding machine 12; adjusting the central line of the traction belt to align with the middle shaft of the production line; pressing down an upper pull roll 2012 at the head end of the stokehole shearing device 2 and an upper pull roll 1122 at the tail end of the stokehole shearing device 11; closing an inlet end sealing door 502 of the preheating furnace 5 and an outlet end sealing door 704 of the cooling furnace 7; shearing the traction belt by using a stokehold shearing device 2, and adjusting the tail position of the traction belt to an alloy belt welding device 3 at the speed of 1 m/min; unloading the coiled material of the traction belt from the uncoiler 1, replacing the coiled material of the copper alloy, shearing the belt head of the coiled material of the copper alloy orderly by using a furnace front shearing device 2, manually aligning the belt tail of the traction belt with the belt head of the coiled material of the copper alloy on an alloy belt welding device 3, and fixedly connecting the belt tail of the traction belt with the belt head of the coiled material of the copper alloy through argon arc welding hole welding; adjusting the tension of the tension roller 404 of the stokehole S roller device 4 and the winding synchronous tension roller device 122 of the winding machine 12; the head of the copper alloy coiled material is fixed on the winding machine 12 in a traction way at the speed of 1m/min, and the feeding of the copper alloy coiled material is stopped;

S2, replacing safety gas in the furnace: feeding nitrogen into the preheating furnace 5, the heating and heat-preserving furnace 6 and the cooling furnace 7 at a flow rate of 5m3/h through an air cooler 702 of the cooling furnace 7, and finally discharging the nitrogen through a tail gas discharge port 505 of the preheating furnace 5; when the oxygen content in the furnace is less than 1 percent and the replacement time is more than 3 hours, the safe gas replacement in the furnace is finished;

S3, cooling and protecting gas replacement; feeding mixed gas of nitrogen and hydrogen into the preheating furnace 5, the heating and heat-preserving furnace 6 and the cooling furnace 7 according to the flow rate of 26m3/h by an air cooler 702 of the cooling furnace 7, wherein the volume ratio of the nitrogen to the hydrogen is 75:25, the residual oxygen concentration is less than 2ppm, and the dew point temperature after purification is-65 ℃; meanwhile, the tail gas discharge port 505 is continuously provided with electric spark ignition until tail gas discharged from the tail gas discharge port 505 is stably ignited; the cooling protective gas replacement time is more than 30 minutes;

S4, heating and temperature rising: seven groups of resistance heating belts 602 of the heating holding furnace 6 are electrified and heated according to the set current of the process; starting an inlet end corona generator 503 of the preheating furnace 5 and an outlet end corona generator 705 of the cooling furnace 7; when the temperature of each section of the heating holding furnace 6 reaches 200 ℃, 400 ℃, 600 ℃, 700 ℃ and 700 ℃, keeping for 2 hours, and then increasing the working current of the seven groups of resistance heating belts 602 to the set current of the normal working process; after the temperature of each section of the heating holding furnace 6 reaches 250 ℃, 450 ℃, 650 ℃, 750 ℃ and 750 ℃ respectively and is kept stable, entering a normal working state;

S5, online processing: the supply of the cooling protective gas is increased to 28m3/h according to the process requirement; starting the high-performance copper alloy strip online solution heat treatment device to automatically operate, and gradually feeding the copper alloy coiled material at an accelerated speed to finally reach 27 m/min; the temperature of the copper alloy strip after being cooled by the cooling furnace 7 is lower than 35 ℃.

s6, finishing production: after the production of the online solution heat treatment of the copper alloy strip is finished, cutting off the current of seven groups of resistance heating belts 602 of the heating and heat-preserving furnace 6; closing the high-performance copper alloy strip online solution heat treatment device to automatically operate; plugging an inlet end sealing door 502 and an outlet end sealing door 704 by wool felt; the cooling protective gas supply amount is reduced to 5m 3/h; the belt tail of the copper alloy coiled material is cut off by the post-furnace shearing device 11, the copper alloy coiled material is coiled by the coiling machine 12, and the tail end of the copper alloy coiled material is fixed by an adhesive tape; and when the temperature of the heating holding furnace 6 is reduced to below 550 ℃, replacing the air cooler 702 passing through the cooling furnace 7 with nitrogen gas with the nitrogen flow of 2m3/h, continuing the replacement time until the temperature of each section of the heating holding furnace 6 is reduced to below 300 ℃, and turning off the air cooler 702 of the cooling furnace 7.

Taking a beryllium bronze alloy strip with the reference TBe2 as an example, the strip feeding speeds when the thicknesses are different are as follows:

Thickness mm	0.08	0.1	0.2	0.4	0.6	0.8
							width mm	420	420	420	420	420	420
Process speed m/min	27	21	11	5.4	3.6	2.7

the present invention is not described in detail in the prior art.