阅读说明：本技术 一种耐磨型高速钢热轧工艺 (Wear-resistant high-speed steel hot rolling process ) 是由 卢浩政 徐晓英 于 2021-08-02 设计创作，主要内容包括：本发明提供了一种耐磨型高速钢热轧工艺,包括如下步骤：A、入炉加热处理：将坯料放入到加热炉中加热,加热温度控制在1150～1210℃,热时间控制在120～150min；B、粗轧处理：使用三道次粗轧,第一道次压下率为30～40％,第二道次压下率为20～30％,第三道次压下率为12～24％；C、精轧处理：精轧第一道次轧制温度控制在1040～1080℃,热轧板的厚度控制在1.0～2.5mm,精轧终轧温度控制在780～900℃；D、冷却处理：精轧后经过层流冷却,冷却速率控制在16～24℃/s；E、卷取处理：层流冷却后通过卷取机进行卷取,卷取温度控制在500～650℃,得到所需的高速钢。(The invention provides a hot rolling process for wear-resistant high-speed steel, which comprises the following steps: A. and (3) furnace entering heating treatment: putting the blank into a heating furnace for heating, wherein the heating temperature is controlled to be 1150-1210 ℃, and the heating time is controlled to be 120-150 min; B. rough rolling treatment: three-pass rough rolling is adopted, the first-pass reduction rate is 30-40%, the second-pass reduction rate is 20-30%, and the third-pass reduction rate is 12-24%; C. finish rolling treatment: the temperature of the first finish rolling pass is controlled to be 1040-1080 ℃, the thickness of the hot rolled plate is controlled to be 1.0-2.5 mm, and the temperature of the finish rolling pass is controlled to be 780-900 ℃; D. cooling treatment: after finish rolling, carrying out laminar cooling, wherein the cooling rate is controlled to be 16-24 ℃/s; E. coiling: and (4) after laminar cooling, coiling by a coiling machine, wherein the coiling temperature is controlled at 500-650 ℃, and obtaining the required high-speed steel.)

1. A hot rolling process for wear-resistant high-speed steel is characterized by comprising the following steps:

A. and (3) furnace entering heating treatment: putting the blank into a heating furnace for heating, wherein the heating temperature is controlled to be 1150-1210 ℃, and the heating time is controlled to be 120-150 min;

B. rough rolling treatment: three-pass rough rolling is adopted, the first-pass reduction rate is 30-40%, the second-pass reduction rate is 20-30%, and the third-pass reduction rate is 12-24%;

C. finish rolling treatment: the temperature of the first finish rolling pass is controlled to be 1040-1080 ℃, the thickness of the hot rolled plate is controlled to be 1.0-2.5 mm, and the temperature of the finish rolling pass is controlled to be 780-900 ℃;

D. cooling treatment: after finish rolling, carrying out laminar cooling, wherein the cooling rate is controlled to be 16-24 ℃/s;

E. coiling: and (4) after laminar cooling, coiling by a coiling machine, wherein the coiling temperature is controlled at 500-650 ℃, and obtaining the required high-speed steel.

2. The hot rolling process of claim 1, wherein the thickness of the blank is 200-250 mm.

3. The hot rolling process of claim 1, wherein the chemical composition of the high-speed steel is W: 11.28-14.54%, C: 2.12-2.47%, Nb: 2.07-2.29%, Si: 2.21-2.35%, Mn: 0.65-0.84%, P: 0.01-0.03%, S: 0.01-0.03%, Cr: 6.25-6.57%, Mo: 1.12-1.78%, and the balance of Fe and inevitable impurities.

4. The hot rolling process of wear-resistant high-speed steel according to claim 1, characterized in that the heating furnace comprises a pedestal (1), a furnace body (31) is mounted on the pedestal (1), the furnace body (31) is provided with a plurality of heating chambers from top to bottom, a lifting table (4) is further arranged on the pedestal (1), the lifting table (4) is connected with a driving structure capable of driving the lifting table to move up and down, a first guide rail (6) is horizontally fixed on the lifting table (4), a linkage block (9) is connected on the first guide rail (6) in a sliding manner, the linkage block (9) is connected with a second guide rail (11) in a sliding manner, the second guide rail (11) is parallel to the first guide rail (6), the second guide rail (11) is connected with a moving table (13), a taking and placing arm (7) is mounted on the moving table (13), a first rack (5) is fixed on the lifting table (4), and a second rack (10) is fixed on the moving table (13), a power motor (8) is fixed on the linkage sliding block, the power motor (8) is an output shaft motor, a first output shaft of the power motor (8) is connected with a first gear (28), the first gear (28) is meshed with a first rack (5), a second output shaft of the power motor (8) is connected with a second gear (30), the second gear (30) is meshed with a second rack (10), a plurality of guide columns (21) are vertically fixed on the taking and placing arm (7), guide sleeves (22) are arranged on the guide columns (21), the guide sleeves (22) are connected with a floating strip (20), a spring (23) is installed between the floating strip (20) and the driving arm, a driving shaft (18) is installed on the floating strip (20), a power wheel (19) is installed on the driving shaft (18), an avoiding groove (7a) for the power wheel (19) to extend out is also formed in the taking and placing arm (7), the end part of the floating strip (20) is connected through a connecting plate (17), a triangular auxiliary extrusion block (16) is arranged on the connecting plate (17), a triangular main extrusion block (29) matched with the auxiliary extrusion block (16) is arranged on the mobile station (13), and a power assembly capable of enabling the driving shaft (18) to rotate is further arranged on the connecting plate (17).

5. A wear-resistant high-speed steel hot rolling process according to claim 4, characterized in that the driving structure comprises a rail (2), a movable seat (3), a screw rod (15), a nut (14) and a servo motor (12), the rail (2) is vertically fixed on the base frame (1), the movable seat (3) is arranged on the rail (2), the screw rod (15) is vertically and rotatably installed on the base frame (1), the end part of the screw rod (15) is connected with the servo motor (12), the nut (14) is in threaded connection with the screw rod (15), and the lifting seat is installed between the nut (14) and the movable seat (3).

6. A wear-resistant high-speed steel hot rolling process according to claim 4, characterized in that the power assembly comprises a stepping motor (26), a coupling (24), a plurality of master gears (25) and a plurality of slave gears (27), the coupling (24) is horizontally and rotatably mounted on the connecting plate (17), the coupling (24) is connected with the stepping motor (26), the master gears (25) are fixed on the coupling (24), the slave gears (27) are fixed on the driving shaft (18), and the slave gears (27) are meshed with the master gears (25).

Technical Field

The invention belongs to the technical field of machinery, relates to a hot rolling process, and particularly relates to a hot rolling process for wear-resistant high-speed steel.

Background

Hot rolling is a rolling performed at a recrystallization temperature or lower, as compared with cold rolling, which is a rolling performed at a recrystallization temperature or higher. In brief, a steel billet is heated, rolled for a plurality of times, cut to be edge and corrected into a steel plate, and the hot rolling can obviously reduce energy consumption and cost; the metal plasticity is high during hot rolling, the deformation resistance is low, and the energy consumption of metal deformation is greatly reduced; hot rolling can improve the processing property of metal and alloy, i.e. crushing the coarse grains in casting state, healing the cracks obviously, reducing or eliminating casting defects, converting the as-cast structure into a deformed structure and improving the processing property of the alloy.

The hot rolling process of the high-speed steel in the prior art is too simple, and the hot rolling quality of the high-speed steel cannot be guaranteed, so that the design of the wear-resistant hot rolling process of the high-speed steel is necessary.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a wear-resistant high-speed steel hot rolling process which has the characteristic of reliable product quality.

The purpose of the invention can be realized by the following technical scheme: a hot rolling process for wear-resistant high-speed steel is characterized by comprising the following steps:

A. and (3) furnace entering heating treatment: putting the blank into a heating furnace for heating, wherein the heating temperature is controlled to be 1150-1210 ℃, and the heating time is controlled to be 120-150 min;

B. rough rolling treatment: three-pass rough rolling is adopted, the first-pass reduction rate is 30-40%, the second-pass reduction rate is 20-30%, and the third-pass reduction rate is 12-24%;

C. finish rolling treatment: the temperature of the first finish rolling pass is controlled to be 1040-1080 ℃, the thickness of the hot rolled plate is controlled to be 1.0-2.5 mm, and the temperature of the finish rolling pass is controlled to be 780-900 ℃;

D. cooling treatment: after finish rolling, carrying out laminar cooling, wherein the cooling rate is controlled to be 16-24 ℃/s;

E. coiling: and (4) after laminar cooling, coiling by a coiling machine, wherein the coiling temperature is controlled at 500-650 ℃, and obtaining the required high-speed steel.

The thickness of the blank is 200-250 mm.

The high-speed steel comprises the following chemical components in percentage by weight: 11.28-14.54%, C: 2.12-2.47%, Nb: 2.07-2.29%, Si: 2.21-2.35%, Mn: 0.65-0.84%, P: 0.01-0.03%, S: 0.01-0.03%, Cr: 6.25-6.57%, Mo: 1.12-1.78%, and the balance of Fe and inevitable impurities.

The heating furnace comprises a base frame, a furnace body is arranged on the base frame, the furnace body is provided with a plurality of heating chambers from top to bottom, a lifting table is further arranged on the base frame and connected with a driving structure capable of driving the lifting table to move up and down, a first guide rail is horizontally fixed on the lifting table, a first linkage block is connected on the first guide rail in a sliding manner and is connected with a second guide rail in a sliding manner, the second guide rail is parallel to the first guide rail, the second guide rail is connected with a moving table, a taking and placing arm is arranged on the moving table, a first rack is fixed on the lifting table, a second rack is fixed on the moving table, a power motor is fixed on a linkage sliding block, the power motor is an output shaft motor, a first output shaft of the power motor is connected with a first gear, the first gear is meshed with the first rack, a second output shaft of the power motor is connected with a second gear, the second gear is meshed with the second rack, a plurality of guide posts are vertically fixed on the taking and placing arm, guide sleeves are arranged on the guide posts, the guide pin bushing links to each other with the strip that floats, install the spring between strip and the actuating arm that floats, install the drive shaft on the strip that floats, install the power wheel in the drive shaft, get and put and still set up the groove of dodging that supplies the power wheel to stretch out on the arm, the strip tip that floats links to each other through the connecting plate, install on the connecting plate and be triangle-shaped from the extrusion piece, install on the mobile station and be triangle-shaped's main extrusion piece from extrusion piece matched with, still be provided with on the connecting plate and enable drive shaft pivoted power component.

By adopting the structure, the first gear and the second gear are driven to rotate by the power motor, the first gear is meshed with the first rack, the second gear is meshed with the second rack, the picking and placing arm can fast forward or fast out under the coordination of the linkage seat, the first guide rail and the second guide rail, meanwhile, after the picking and placing arm retracts, the main extrusion block can abut against the auxiliary extrusion block, the avoiding groove extending out of the power wheel is enabled, blanks on the picking and placing arm are moved by the rotation of the power wheel, the blank transmission time can be reduced, and the subsequent processing quality of the blanks is ensured.

The driving structure comprises a rail, a movable seat, a lead screw, a nut and a servo motor, wherein the rail is vertically fixed on the base frame, the movable seat is arranged on the rail, the lead screw is vertically rotated and installed on the base frame, the end part of the lead screw is connected with the servo motor, the nut is in threaded connection with the lead screw, and the lifting seat is installed between the nut and the movable seat.

By adopting the structure, the screw rod is driven to rotate by the servo motor, the screw rod enables the nut to move, and the movable seat further enables the movable seat to move up and down on the track.

The power assembly comprises a stepping motor, a coupling, a plurality of main gears and a plurality of slave gears, the coupling is horizontally and rotatably installed on the connecting plate and connected with the stepping motor, the main gears are fixed on the coupling, the slave gears are fixed on the driving shaft, and the slave gears are meshed with the main gears.

By adopting the structure, the stepping motor drives the coupling shaft to rotate, the coupling shaft drives the main gear to rotate, the main gear is meshed with the driven gear, and the driven gear drives the driving shaft to rotate.

Compared with the prior art, the wear-resistant high-speed steel hot rolling process has the advantages that:

the invention drives the first gear and the second gear to rotate through the power motor, the first gear is meshed with the first rack, the second gear is meshed with the second rack, and the picking and placing arm can fast forward or fast out under the coordination of the linkage seat, the first guide rail and the second guide rail.

Drawings

FIG. 1 is a schematic representation of the steps of the present invention.

FIG. 2 is a schematic plan view of the heating furnace.

FIG. 3 is a schematic plan view of a removed portion of the heating furnace.

FIG. 4 is a schematic plan view of the power module in the heating furnace.

FIG. 5 is a schematic plan view of the structure of the furnace at the power motor.

In the figure, 1, a base frame; 2. a track; 3. a movable seat; 4. a lifting platform; 5. a first rack; 6. a first guide rail; 7. a pick-and-place arm; 7a, avoiding grooves; 8. a power motor; 9. a linkage block; 10. a second rack; 11. a second guide rail; 12. a servo motor; 13. a mobile station; 14. a nut; 15. a screw rod; 16. from the extrusion block; 17. a connecting plate; 18. a drive shaft; 19. a power wheel; 20. a floating bar; 21. a guide post; 22. a guide sleeve; 23. a spring; 24. coupling; 25. a main gear; 26. a stepping motor; 27. a slave gear; 28. a first gear; 29. a main extrusion block; 30. a second gear; 31. a furnace body.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-5, the hot rolling process of the wear-resistant high-speed steel comprises the following steps:

A. and (3) furnace entering heating treatment: putting the blank into a heating furnace for heating, wherein the heating temperature is controlled to be 1150-1210 ℃, and the heating time is controlled to be 120-150 min;

B. rough rolling treatment: three-pass rough rolling is adopted, the first-pass reduction rate is 30-40%, the second-pass reduction rate is 20-30%, and the third-pass reduction rate is 12-24%;

C. finish rolling treatment: the temperature of the first finish rolling pass is controlled to be 1040-1080 ℃, the thickness of the hot rolled plate is controlled to be 1.0-2.5 mm, and the temperature of the finish rolling pass is controlled to be 780-900 ℃;

D. cooling treatment: after finish rolling, carrying out laminar cooling, wherein the cooling rate is controlled to be 16-24 ℃/s;

E. coiling: and (4) after laminar cooling, coiling by a coiling machine, wherein the coiling temperature is controlled at 500-650 ℃, and obtaining the required high-speed steel.

The thickness of the blank is 200-250 mm, and in the embodiment, the thickness of the blank is 230 mm.

The high-speed steel comprises the following chemical components in percentage by weight: 11.28-14.54%, C: 2.12-2.47%, Nb: 2.07-2.29%, Si: 2.21-2.35%, Mn: 0.65-0.84%, P: 0.01-0.03%, S: 0.01-0.03%, Cr: 6.25-6.57%, Mo: 1.12-1.78%, and the balance of Fe and inevitable impurities.

The heating furnace comprises a base frame 1, wherein a furnace body 31 is arranged on the base frame 1, and in the embodiment, the furnace body 31 is arranged on the base frame 1 in a bolt connection mode; the furnace body 31 has a plurality of heating chambers from top to bottom, and in the embodiment, the structure of the furnace body 31 is the prior art; the base frame 1 is also provided with a lifting platform 4, the lifting platform 4 is connected with a driving structure capable of driving the lifting platform to move up and down, a first guide rail 6 is horizontally fixed on the lifting platform 4, a linkage block 9 is connected on the first guide rail 6 in a sliding manner, the linkage block 9 is connected with a second guide rail 11 in a sliding manner, the second guide rail 11 is parallel to the first guide rail 6, the second guide rail 11 is connected with a moving platform 13, a pick-and-place arm 7 is installed on the moving platform 13, a first rack 5 is fixed on the lifting platform 4, a second rack 10 is fixed on the moving platform 13, a power motor 8 is fixed on a linkage sliding block, the power motor 8 is an output shaft motor, a first output shaft of the power motor 8 is connected with a first gear 28, the first gear 28 is meshed with the first rack 5, a second output shaft of the power motor 8 is connected with a second gear 30, the second gear 30 is meshed with the second rack 10, a plurality of guide columns 21 are vertically fixed on the pick-and-place arm 7, guide sleeves 22 are arranged on the guide columns 21, the guide sleeve 22 is connected with the floating strip 20, a spring 23 is installed between the floating strip 20 and the driving arm, a driving shaft 18 is installed on the floating strip 20, a power wheel 19 is installed on the driving shaft 18, an avoiding groove 7a for the power wheel 19 to extend out is further formed in the pick-and-place arm 7, the end portion of the floating strip 20 is connected through a connecting plate 17, a triangular secondary extrusion block 16 is installed on the connecting plate 17, a triangular main extrusion block 29 matched with the secondary extrusion block 16 is installed on the moving platform 13, and a power assembly capable of enabling the driving shaft 18 to rotate is further arranged on the connecting plate 17.

By adopting the structure, the first gear 28 and the second gear 30 are driven to rotate by the power motor 8, the first gear 28 is meshed with the first rack 5, the second gear 30 is meshed with the second rack 10, the picking and placing arm 7 can fast forward or fast out under the coordination of the linkage seat, the first guide rail 6 and the second guide rail 11, meanwhile, after the picking and placing arm 7 retracts, the main extrusion block 29 can abut against the auxiliary extrusion block 16, the avoidance groove 7a extending out of the power wheel 19 moves the blank on the picking and placing arm 7 by the rotation of the power wheel 19, thereby reducing the time for conveying the blank and ensuring the subsequent processing quality of the blank.

The driving structure comprises a track 2, a movable seat 3, a lead screw 15, a nut 14 and a servo motor 12, wherein the track 2 is vertically fixed on a base frame 1, the movable seat 3 is arranged on the track 2, the lead screw 15 is vertically rotated and installed on the base frame 1, the end part of the lead screw 15 is connected with the servo motor 12, the nut 14 is in threaded connection on the lead screw 15, and a lifting seat is installed between the nut 14 and the movable seat 3.

By adopting the structure, the screw rod 15 is driven to rotate by the servo motor 12, the screw rod 15 enables the nut 14 to move, and the movable seat 3 further moves up and down on the track 2.

The power assembly comprises a stepping motor 26, a coupling 24, a plurality of main gears 25 and a plurality of slave gears 27, wherein the coupling 24 is horizontally and rotatably arranged on the connecting plate 17, the coupling 24 is connected with the stepping motor 26, the main gears 25 are fixed on the coupling 24, the slave gears 27 are fixed on the driving shaft 18, and the slave gears 27 are meshed with the main gears 25.

With this structure, the stepping motor 26 rotates the coupling 24, the coupling 24 rotates the master gear 25, the master gear 25 meshes with the slave gear 27, and the slave gear 27 rotates the drive shaft 18.

The above components are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.