阅读说明：本技术 一种金属板带材分段式热处理装置及工艺方法 (Sectional type heat treatment device and process method for metal plate strip ) 是由 付天亮 王昭东 邓想涛 韩毅 李勇 李家栋 张志福 刘光浩 于 2019-12-04 设计创作，主要内容包括：本发明属于金属板带材热处理领域,涉及一种金属板带材分段式热处理装置及工艺方法。该装置包括辊压式淬火装置、高压射流淬火装置、常压持续淬火装置,辊压式淬火装置采用液压压下辊缝控制,对极薄规格金属板带材实施受约束辊压式淬火,高压射流淬火装置采用瞬时大流量冷却方式,对超宽、特厚规格金属板带材实施高强度、高均匀性性淬火,常压持续淬火装置采用冷却路径控制,实现冷却强度高精度控制,三类淬火装置组合配置使用,形成分段式热处理工艺方法。本发明满足了多品种、变规格金属板带材复杂热处理工艺需求,实现了金属板带材高平直度、高均匀性、高效率淬火热处理。(The invention belongs to the field of heat treatment of metal plates and strips, and relates to a sectional type heat treatment device and a sectional type heat treatment process method for the metal plates and the strips. The device comprises a rolling type quenching device, a high-pressure jet quenching device and a normal-pressure continuous quenching device, wherein the rolling type quenching device adopts hydraulic pressure to press a roll gap for control, and implements restrained rolling type quenching on the extremely thin metal plate strips, the high-pressure jet quenching device adopts an instantaneous large-flow cooling mode to implement high-strength and high-uniformity quenching on the ultra-wide and extremely thick metal plate strips, the normal-pressure continuous quenching device adopts a cooling path for control, so that the high-precision control of the cooling strength is realized, and the three types of quenching devices are combined for use to form the sectional type heat treatment process method. The invention meets the complex heat treatment process requirements of various metal plate strips with variable specifications and realizes the quenching heat treatment with high flatness, high uniformity and high efficiency of the metal plate strips.)

1. The sectional type heat treatment device for the metal plate strip is characterized by comprising a roll-press type quenching device (4), a high-pressure jet flow quenching device (9) and a normal-pressure continuous quenching device (11) which are sequentially arranged, wherein the roll-press type quenching device (4) is connected and installed behind a roller hearth type heat treatment furnace through a roller way, and the normal-pressure continuous quenching device (11) is connected and installed in front of a rear output roller way of the machine through the roller way; the roll-pressing type quenching device (4) comprises a water spraying system A, a roller way system A, a rack system A and a hydraulic system A; the water spraying system A comprises 2-4 groups of slit nozzles which are arranged up and down on symmetrical metal plate strips for cooling, and the water spraying pressure is 0.5-1.0 MPa; the roller bed system A comprises flat rollers and spiral rollers with the diameters of 180-240 mm, the slit nozzles are arranged between the roller beds, every two upper roller beds and two lower roller beds are arranged in a fixed frame type frame, and the upper roller beds horizontally move up and down along sliding rails in the frame type frame; the hydraulic system A adopts a servo control mode to drive the upper roller way to accurately move up and down horizontally, a displacement sensor arranged in a hydraulic cylinder is used for measuring the movement displacement of the upper roller way, the maximum movement stroke of the upper roller way is 300-600 mm, in the quenching heat treatment process of the metal plate strip, a hydraulic cylinder single cylinder downwards applies 0-10 tons of pressing force of the upper roller way to restrain the metal plate strip to be quenched, and the metal plate strip continuously and unidirectionally passes through a rolling type quenching device;

the high-pressure jet quenching device comprises a water spraying system B, a roller way system B, a rack system B and a hydraulic system B, wherein the water spraying system B is used for cooling 1-2 groups of slit nozzles (8) and 3-6 groups of densely-arranged round hole jet nozzles (10) which are vertically arranged on symmetrical metal plate strips, the water spraying pressure is 0.5-1.0 MPa, the roller way system B comprises flat rollers with the diameter of 220-400 mm and spiral rollers, the slit nozzles and the densely-arranged round hole jet nozzles are arranged between the roller ways, all lower roller ways are arranged on a fixed rack, and all upper roller ways are arranged on a movable rack; the hydraulic system B drives the movable rack to drive the upper roller way to accurately move up and down horizontally in a servo control mode, a displacement sensor arranged in a hydraulic cylinder is used for measuring the movement displacement of the upper roller way, the maximum movement stroke of the upper roller way is 300-700 mm, the upper roller way does not apply downward constraint force on the metal plate strip in the quenching heat treatment process of the metal plate strip, and the metal plate strip continuously and unidirectionally passes through the high-pressure jet quenching device;

the normal pressure continuous quenching device comprises a water spraying system C, a roller way system C, a rack system C and an electric lifting system, wherein the water spraying system C is cooled by 6-30 groups of cambered surface densely-arranged round hole jet nozzles (13) which are arranged up and down on symmetrical metal plate strips, the water spraying pressure is 0.1-0.5 MPa, the roller way system consists of flat rollers with the diameter of 220-400 mm, the cambered surface densely-arranged round hole jet nozzles are arranged between the roller ways, all lower roller ways are arranged on a fixed rack, all upper roller ways are arranged on a movable rack, the movable rack is driven by a motor to move up and down horizontally, the displacement of the movable rack is measured by a rack four-corner displacement sensor, the maximum moving stroke of the upper roller ways is 300-700 mm, in the quenching heat, the upper roller way does not apply downward constraint force to the metal plate strip, and the metal plate strip continuously and unidirectionally passes through the normal-pressure continuous quenching device or swings back and forth in the region of the normal-pressure continuous quenching device.

2. The sectional type heat treatment device for the metal plate and strip as claimed in claim 1, wherein the slit nozzle of the roll press type quenching device, the slit nozzle and the closely-arranged circular hole jet nozzles of the high pressure jet quenching device and the cambered closely-arranged circular hole jet nozzles of the constant pressure continuous quenching device are all in a cavity-divided structure along the length direction, and the middle cavity and the side cavity of each nozzle are independently supplied with water.

3. The sectional type heat treatment device for the metal plate and strip as claimed in claim 1 or 2, wherein all the upper roller way and the lower roller way of the rolling type quenching device and the high pressure jet quenching device and all the lower roller way of the normal pressure continuous quenching device are driven by a single speed reduction motor and are controlled in a closed loop manner at the roller speed, and the linear speed of the roller surface ranges from 0.2 m/s to 1.0 m/s.

4. A sectional heat treatment process for a metal plate strip using the apparatus as claimed in any one of claims 1 to 3, wherein when the metal plate strip having a thickness of 10mm or more and 2mm or more is subjected to solution heat treatment and quenching heat treatment, the roll press type quenching apparatus is put into use, the water spray pressure of the slit nozzle is 0.5 to 1.0MPa, the high pressure jet quenching apparatus and the normal pressure continuous quenching apparatus do not spray water, and the roll gap between the upper roll table and the lower roll table of the high pressure jet quenching apparatus and the normal pressure continuous quenching apparatus is adjusted to 500 to 700 mm.

5. The sectional heat treatment process for metal plate and strip using the apparatus as claimed in any one of claims 1 to 3, wherein when the thickness of the metal plate and strip is more than 10mm, the high-pressure jet quenching apparatus and the normal-pressure continuous quenching apparatus are used, the water spraying pressure of the slit nozzle and the close-packed circular hole jet nozzle of the high-pressure jet quenching apparatus is 0.5 to 1.0MPa, the water spraying pressure of the arc-surface close-packed circular hole jet nozzle of the normal-pressure continuous quenching apparatus is 0.4 to 0.5MPa, the roll-press quenching apparatus does not spray water, and the roll gap between the upper roller table and the lower roller table of the roll-press quenching apparatus is adjusted to 400 to 600 mm.

6. A sectional heat treatment process for a metal strip using the apparatus as set forth in any one of claims 1 to 3, characterized in that, during the controlled cooling and the weak water cooling heat treatment of the metal strip, a constant pressure continuous quenching apparatus is used, the water spray pressure of the spray nozzles of the circular holes densely arranged on the arc surface is 0.1 to 0.3MPa, the spray water is not sprayed to the rolling type quenching apparatus and the high pressure spray quenching apparatus, and the roll gaps between the upper roll table and the lower roll table of the rolling type quenching apparatus and the high pressure spray quenching apparatus are respectively adjusted to 500 to 700mm and 400 to 600 mm.

7. The sectional heat treatment process for metal plate and strip using the apparatus as set forth in any one of claims 1 to 3, wherein the slit nozzle, the close-packed circular hole jet nozzle or the arc-surface close-packed circular hole jet nozzle for spraying water opens only the middle chamber when the width of the metal plate and strip is less than 3000mm, and opens the middle chamber and the side chamber simultaneously when the width of the metal plate and strip is more than 3000 mm.

Technical Field

The invention belongs to the field of heat treatment of metal plates and strips, and relates to a sectional type heat treatment device and a sectional type heat treatment process method for the metal plates and the strips.

Background

The quenching heat treatment is a key process for improving the comprehensive performance of the metal plate strip, and particularly has obvious effects on improving the strength, toughness, corrosion resistance, high-temperature performance, fatigue performance, processability and the like. The metal plate strips subjected to quenching heat treatment are various (such as plain carbon steel, stainless steel, aluminum alloy, titanium alloy, high-temperature alloy and the like), the specification span is large (the thickness is 2-300 mm, the width is 800-5000 mm), and the heat treatment process is complex (such as solid solution, quenching, cooling control, weak water cooling and the like).

At present, the conventional quenching heat treatment device is difficult to meet the requirements of various, variable-specification and complex heat treatment processes for metal plates and strips. In the aspect of cooling speed, instantaneous large cooling speed cooling (the cooling speed is more than 30 ℃/s), continuous constant cooling speed cooling (the cooling time is more than 300s), controlled cooling, weak water cooling and other processes are difficult to be considered, the combination mode of a cooling nozzle is single, effective fine control of a cooling path cannot be implemented, and the tissue performance after heat treatment is difficult to guarantee; in the aspect of specification, the quenching stress of an extremely-thin metal plate strip (with the thickness of 2-10 mm) is large, the plate shape deterioration is obvious, the plate shape after quenching is difficult to correct, the subsequent processing deformation is large, and the conventional quenching heat treatment device and process are difficult to meet the requirements of high flatness and low residual stress quenching heat treatment; after quenching, the ultra-wide specification metal plate and strip (the width is more than 3500mm) has obvious wide deformation and uneven distribution of structural properties, the quenching adjustment means of the wide uniformity of the plate and strip is lacked, and the quenching heat treatment with high uniformity is difficult to produce; the quenching thickness-direction section effect of the ultra-thick specification metal plate strip (with the thickness of 150-300 mm) is obvious, the cooling speed of the core of the plate strip is low, the cooling uniformity of the section is poor, and the core toughness is insufficient and the thickness-direction structure performance difference is large after the plate strip is quenched.

In order to solve the problems, the quenching heat treatment device and the quenching heat treatment method need to be started from two aspects, namely the quenching heat treatment device and the quenching process method, the configuration form of the existing single fixed quenching cooling device is changed, different types of quenching units are combined and configured in a segmented/partitioned mode aiming at different types and specifications of metal plate strips, the characteristics of each quenching unit are fully exerted, process combination optimization is implemented, the process requirements of cooling path control, flow partition control, constraint quenching and the like are met, and the quenching heat treatment production with high flatness and high uniformity of the metal plate strips is realized.

In the prior art, chinese patent application (publication No. CN107287397A) proposes a cooling device for heat treatment of hot continuous rolled steel plates and a control method thereof, wherein the device is composed of a high-pressure jet cooling system and a low-pressure water mist cooling system to form an integral cooling device. The device is only used for quenching heat treatment of hot rolled strip steel, and the device is an object to be improved by the invention.

The Chinese patent application (publication No. CN104120225A) provides a quenching heat treatment device and a quenching heat treatment method for a precise elastic alloy, wherein the device consists of a heating unit, a high-temperature alloy atmosphere protection unit, an atmosphere control unit, a temperature control unit, an operation unit and a flowing water cooling unit, the heating time and the quenching time of a workpiece are shortened, and the workpiece is uniformly heated and rapidly cooled. The invention provides innovations of a heat treatment device and a heat treatment method for precise elastic alloy parts, which are not related to the quenching heat treatment of the metal plate strip.

The Chinese patent application (publication No. CN205099724U) provides a quenching heat treatment device for ultra-high strength steel strips, which comprises a feeding structure, a supporting mechanism, a water tank, a cleaning chamber, a drying chamber, a rapid cooling chamber and the like.

The Chinese patent application (publication No. CN204589245U) provides a quenching device for heat treatment of aluminum alloy, which consists of a quenching tank, a fixing device and a control system, wherein the device adopts the forms of spraying and air cooling of the quenching tank, and has larger difference with the roll-pressing type jet water-spraying cooling of the invention.

Disclosure of Invention

Aiming at the problems that the quenching heat treatment varieties and specifications of the existing metal plate and strip are limited and the complex cooling process is difficult to realize, the invention aims to provide a sectional type heat treatment device and a sectional type heat treatment process method for the metal plate and strip, wherein the sectional type heat treatment device and the sectional type heat treatment process method can effectively improve the shape and the uniformity of a quenching plate and broaden the production specifications and product varieties of the metal plate and strip.

The technical scheme of the invention is as follows:

a sectional type heat treatment device for metal plate strips comprises a roll-press type quenching device, a high-pressure jet quenching device and a normal-pressure continuous quenching device which are sequentially arranged, wherein the roll-press type quenching device is connected and installed behind a roller hearth type heat treatment furnace through a roller way, and the normal-pressure continuous quenching device is connected and installed in front of a rear output roller way of the machine through the roller way; the roll-pressing type quenching device comprises a water spraying system A, a roller way system A, a rack system A and a hydraulic system A; the water spraying system A comprises 2-4 groups of slit nozzles which are arranged up and down on symmetrical metal plate strips for cooling, and the water spraying pressure is 0.5-1.0 MPa; the roller bed system A comprises flat rollers and spiral rollers with the diameters of 180-240 mm, the slit nozzles are arranged between the roller beds, every two upper roller beds and two lower roller beds are arranged in a fixed frame type frame, and the upper roller beds horizontally move up and down along sliding rails in the frame type frame; the hydraulic system A adopts a servo control mode to drive the upper roller way to accurately move up and down horizontally, a displacement sensor arranged in a hydraulic cylinder is used for measuring the movement displacement of the upper roller way, the maximum movement stroke of the upper roller way is 300-600 mm, in the quenching heat treatment process of the metal plate strip, a hydraulic cylinder single cylinder downwards applies 0-10 tons of pressing force of the upper roller way to restrain the metal plate strip to be quenched, and the metal plate strip continuously and unidirectionally passes through a rolling type quenching device;

the high-pressure jet quenching device comprises a water spraying system B, a roller way system B, a rack system B and a hydraulic system B, wherein the water spraying system B is used for cooling 1-2 groups of slit nozzles and 3-6 groups of densely-arranged round hole jet nozzles which are arranged up and down on symmetrical metal plate strips, the water spraying pressure is 0.5-1.0 MPa, the roller way system B consists of flat rollers with the diameter of 220-400 mm and spiral rollers, the slit nozzles and the densely-arranged round hole jet nozzles are arranged between the roller ways, all lower roller ways are arranged on a fixed rack, and all upper roller ways are arranged on a movable rack; the hydraulic system B drives the movable rack to drive the upper roller way to accurately move up and down horizontally in a servo control mode, a displacement sensor arranged in a hydraulic cylinder is used for measuring the movement displacement of the upper roller way, the maximum movement stroke of the upper roller way is 300-700 mm, the upper roller way does not apply downward constraint force on the metal plate strip in the quenching heat treatment process of the metal plate strip, and the metal plate strip continuously and unidirectionally passes through the high-pressure jet quenching device;

the normal-pressure continuous quenching device comprises a water spraying system C, a roller way system C, a rack system C and an electric lifting system, wherein the water spraying system C is cooled by 6-30 groups of cambered surface densely-arranged round hole jet nozzles which are arranged up and down on symmetrical metal plate strips, the water spraying pressure is 0.1-0.5 MPa, the roller way system consists of flat rollers with the diameter of 220-400 mm, the cambered surface densely-arranged round hole jet nozzles are arranged between the roller ways, all lower roller ways are arranged on a fixed rack, all upper roller ways are arranged on a movable rack, the movable rack is driven by a motor to move up and down horizontally, the displacement of the movable rack is measured by a rack four-corner displacement sensor, the maximum displacement stroke of the upper roller ways is 300-700 mm, in the quenching, the upper roller way does not apply downward constraint force to the metal plate strip, and the metal plate strip continuously and unidirectionally passes through the normal-pressure continuous quenching device or swings back and forth in the region of the normal-pressure continuous quenching device.

The slit nozzle of the roll-press type quenching device, the slit nozzle and the close-packed round hole jet nozzle of the high-pressure jet quenching device and the cambered surface close-packed round hole jet nozzle of the normal-pressure continuous quenching device are of a cavity-divided structure along the length direction, and the middle cavity and the side cavity of each nozzle are independently supplied with water.

All upper roller ways and lower roller ways of the rolling quenching device and the high-pressure jet quenching device and all lower roller ways of the normal-pressure continuous quenching device are driven by a single speed reducing motor and are controlled in a roller speed closed loop mode, and the linear speed range of the roller surface is 0.2-1.0 m/s.

When the metal plate strip with the thickness of more than or equal to 10mm and the width of less than or equal to 3000mm is subjected to solution treatment and quenching heat treatment, the roll-pressing type quenching device is put into use, a water spraying system only opens a middle cavity of a slit nozzle, the water spraying pressure is 0.5-1.0 MPa, the high-pressure jet flow quenching device and the normal-pressure continuous quenching device do not spray water, and the roll gaps between an upper roller way and a lower roller way of the high-pressure jet flow quenching device and the normal-pressure continuous quenching device are adjusted to be 500-700 mm.

When the metal plate strip with the thickness of more than or equal to 10mm and the width of more than 3000mm is subjected to solution treatment and quenching heat treatment, the roll-pressing type quenching device is put into use, a water spraying system simultaneously opens a middle cavity and a side cavity of a slit nozzle, the water spraying pressure is 0.5-1.0 MPa, the high-pressure jet flow quenching device and the normal-pressure continuous quenching device do not spray water, and the roll gaps between an upper roller way and a lower roller way of the high-pressure jet flow quenching device and the normal-pressure continuous quenching device are adjusted to be 500-700 mm.

When the metal plate strip with the thickness of more than 10mm and the width of less than or equal to 3000mm is subjected to solution treatment and quenching treatment, the high-pressure jet quenching device and the normal-pressure continuous quenching device are put into use, the water spraying system opens the middle cavities of the slit nozzles, the densely-arranged circular hole jet nozzles and the cambered surface densely-arranged circular hole jet nozzles, the water spraying pressure of the slit nozzles and the densely-arranged circular hole jet nozzles is 0.5-1.0 MPa, the water spraying pressure of the cambered surface densely-arranged circular hole jet nozzles is 0.4-0.5 MPa, the roll-press quenching device does not spray water, and the roll gap between the upper roll table and the lower roll table of the roll-press quenching device is adjusted to 400-600.

When the metal plate strip with the thickness of more than 10mm and the width of more than 3000mm is subjected to solution treatment and quenching treatment, the high-pressure jet quenching device and the normal-pressure continuous quenching device are put into use, the water spraying system starts the middle cavity and the side cavity of the slit nozzle, the closely-arranged circular hole jet nozzles and the cambered surface closely-arranged circular hole jet nozzles, the water spraying pressure of the slit nozzle and the closely-arranged circular hole jet nozzles is 0.5-1.0 MPa, the water spraying pressure of the cambered surface closely-arranged circular hole jet nozzles is 0.4-0.5 MPa, the roll-pressing type quenching device does not spray water, and the roll gap between the upper roller way and the lower roller way of the roll-pressing type quenching device is adjusted to 400-600.

When the metal plate strip with the width less than or equal to 3000mm is subjected to controlled cooling and weak water cooling heat treatment, the normal-pressure continuous quenching device is put into use, the water spraying system opens the middle cavity of the cambered-surface densely-arranged circular hole jet nozzle, the water spraying pressure is 0.1-0.3 MPa, the rolling type quenching device and the high-pressure jet quenching device do not spray water, and the roll gaps between the upper roller way and the lower roller way of the rolling type quenching device and the high-pressure jet quenching device are respectively adjusted to be 500-700 mm and 400-600 mm.

When the width of the metal plate strip is larger than 3000mm, the metal plate strip is controlled to be cooled and subjected to weak water cooling heat treatment, the constant-pressure continuous quenching device is put into use, the water spraying system opens the middle cavity and the side cavity of the cambered-surface densely-arranged circular hole jet nozzles, the water spraying pressure is 0.1-0.3 MPa, the roll-pressing type quenching device and the high-pressure jet quenching device do not spray water, and roll gaps between the upper roller way and the lower roller way of the roll-pressing type quenching device and the high-pressure jet quenching device are respectively adjusted to be 500-700 mm and 400-600 mm.

The invention has the advantages and beneficial effects that:

1. the invention integrates three modes of roller press type restraint quenching, high-pressure instantaneous high-strength quenching and normal-pressure continuous quenching into a set of cooling system: the roll-pressing type restraining quenching device is used for carrying out restrained roll-pressing type quenching on the ultrathin metal plate strip, so that the plate flatness and residual stress distribution of the metal plate strip after quenching heat treatment are effectively improved; the high-pressure jet quenching device carries out instant high-strength quenching on the medium-thickness metal plate strip, effectively improves the quenching and cooling capacity of the device, improves the quenching uniformity of the section of the metal plate strip and improves the quenching and cooling speed of the center of the metal plate strip; the normal-pressure continuous quenching implements long-time continuous cooling for thick-specification metal plate strips, improves the structure performance and uniformity of the metal plate strips after quenching, controls the cooling and weak water cooling processes for the metal plate strips, effectively adjusts the cooling path and cooling speed of the metal plate strips, and provides equipment technical support for implementing diversified heat treatment processes. The cooling nozzles of the three types of devices are uniformly distributed, and the middle cavity and the side cavities are independently supplied with water for control, so that the width-direction flow uniformity of wide-specification metal plate strips is effectively improved, the flatness and the width-direction performance uniformity of the quenched metal plate strips are improved, and the effects of water and energy conservation are achieved.

2. The invention utilizes the characteristics of three types of heat treatment devices, respectively implements different heat treatment methods aiming at different thickness specifications, width specifications and different heat treatment processes, combines the three types of heat treatment devices for use, fully meets the requirements of various, variable specifications and complex heat treatment processes of metal plates and strips, remarkably improves the toughness, the processing performance and the special service performance of the metal plates and strips, and realizes high flatness, high uniformity, high efficiency and low energy consumption heat treatment production.

Drawings

FIG. 1 is a schematic diagram of the sectional type heat treatment apparatus for sheet metal strip according to the present invention and a schematic diagram of the solution and quenching heat treatment process for extremely thin sheet metal strip.

FIG. 2 is a layout diagram of a sectional type heat treatment apparatus for metal plate and strip of the present invention and a schematic diagram of a solution and quenching heat treatment process for a wide and thick specification metal plate and strip.

FIG. 3 is a layout diagram of a sectional type heat treatment apparatus for metal strips and a schematic diagram of a controlled cooling and weak water cooling heat treatment process for medium-thickness metal strips according to the present invention.

FIG. 4 is a schematic view of the sectional type heat treatment apparatus according to the present invention showing the nozzle length direction chamber design.

In the figure, 1 a sheet metal strip; 2, a roller hearth type heat treatment furnace; 3 a segmented heat treatment device; 4, rolling type quenching device; 5, a hydraulic system; 6, feeding the steel wire rope onto a roller way; 7, a roller way is arranged; 8, a slit nozzle; 9 high-pressure jet quenching device; 10 densely arranged circular hole jet nozzles; 11, a constant-pressure continuous quenching device; 12 an electric lifting system; 13 arc surface densely arranged circular hole jet nozzles; 14, a rear run-out table; 15 a middle cavity; a 16-sided cavity.

Detailed Description

A sectional type heat treatment device and a sectional type heat treatment process for metal plate and strip are described in the following with reference to the attached drawings 1, 2, 3 and 4.