Stainless steel band solution treatment cooler

Abstract

The invention discloses a stainless steel band solution treatment cooler, which comprises a transition water jacket and a cooler main body, the cooler main body comprises a cooling water tank, a cooling water jacket, a cooling water roller, a gear and a cooling water roller bearing seat, the cooling water jacket is arranged in the cooling water tank, and the cooling water jacket is welded with the inner wall of the cooling water tank; a plurality of cooling water rollers are arranged in the cooling water jacket, the two ends of each cooling water roller are fixed through a cooling water roller bearing seat, and a gear is installed at the end, penetrating through the cooling water roller bearing seat, of each cooling water roller. And a transition water jacket is arranged at the front end of the cooler main body. The device is reasonable in design, safe, reliable and stable in quality, all the assemblies are high in precision and good in air tightness, through the low-temperature effect of the cooling water tank, the cooling water jacket and the cooling water roller, rapid cooling of the steel belt is achieved, compound precipitation is prevented, it is guaranteed that crystals are uniform and compact, the tensile strength and the ductility are improved, carbide precipitation is effectively prevented, and meanwhile the flattening effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel strip production, in particular to a stainless steel strip solid solution treatment cooler. Background Art

[0002] The traditional production of stainless steel strips is made by semi-finished product rolling, intermediate annealing, and finished product cold rolling. The organizational structure of 300 series stainless steel strips is easy to change after cold rolling on the rolling mill. It is necessary to adjust the annealing furnace and cooling equipment through heat treatment process to obtain qualified metallographic structure, especially austenitic stainless steel. During the solid solution treatment heating process, carbides are dissolved into austenite, heated to 1050-1150℃, and properly kept for a period of time to make all carbides dissolved in austenite, and then quickly cooled to below 350℃ to obtain a supersaturated solid solution, that is, a uniform single crystal austenite structure. The key to this heat treatment process is the cooling rate. Rapid cooling needs to pass the sensitization zone of 950-450℃, otherwise it is easy to have coarse grains and precipitation of impurities, which will seriously affect the tensile strength, elongation and intergranular corrosion. At the same time, the surface of stainless steel plates after cold rolling often has surface defects such as roller bubbles, separation marks, edge waves, middle waves, folds, and collapses.

[0003] Therefore, in order to ensure the production quality of cold-rolled stainless steel strip, in addition to the technical requirements of relevant cold rolling and heat treatment processes, surface defect repair and leveling of stainless steel strip is also the most critical remedial measure. How to repair and level the surface defects of stainless steel strip while rapidly cooling the stainless steel strip is an urgent problem to be solved in this field. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a stainless steel strip solution treatment cooler to achieve rapid cooling and temperature reduction, improve the tensile strength and elongation of the stainless steel strip, and effectively improve the quality of the produced stainless steel strip.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A cooler for solid solution treatment of stainless steel strips, comprising a transition water jacket and a cooler body, wherein the cooler body comprises a cooling water tank, a cooling water jacket, a cooling water roller, a gear and a cooling water roller bearing seat, wherein the cooling water tank is provided with a cooling water jacket and is welded to the inner wall of the cooling water tank; wherein the cooling water jacket is provided with a plurality of cooling water rollers, wherein both ends of the cooling water rollers are fixed by cooling water roller bearing seats, and a gear is installed at one end of the cooling water roller that passes through the cooling water roller bearing seat; and wherein the front end of the cooler body is provided with a transition water jacket.

[0007] Furthermore, the transition water jacket is a rectangular structure and has a conical passage hole inside. A sleeve shaft is installed in the passage hole, and both ends of the sleeve shaft are fixedly installed on the transition water jacket through bearing seats.

[0008] Furthermore, cooling water flows through the bearing seat.

[0009] Furthermore, the cooling water box includes an upper box plate, a lower box plate, a front box plate, a rear box plate, a left box plate and a right box plate. The top surface of the upper box plate is provided with a water outlet pipe; the bottom surface of the lower box plate is provided with a water inlet pipe; the front box plate is provided with a steel belt inlet, and the rear box plate is provided with a steel belt outlet.

[0010] Furthermore, the cooling water jacket comprises a left inner jacket, a right inner jacket, an upper inner jacket and a lower inner jacket, the upper inner jacket and the lower inner jacket are arranged opposite to each other, and are connected to the left inner jacket and the right inner jacket arranged on both sides and the cooling water tank.

[0011] Furthermore, the upper inner sleeve and the lower inner sleeve are both wavy in shape.

[0012] Furthermore, the number of the cooling water rollers is 9 and they are arranged in layers.

[0013] Furthermore, there is a common tangent line between the cooling water rollers.

[0014] Furthermore, the cooling water roller is a hollow structure with cooling water flowing inside.

[0015] Furthermore, the cooling water roller bearing seat is fixedly mounted on a positioning plate, and a ceiling limiter is also provided on the top of the positioning plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The invention has reasonable design, safety, reliability, stable quality, high precision of each component, good air tightness, and can quickly cool down the steel strip at about 1100°C at a speed of 140°C / second through the low temperature effect of the cooling water tank, cooling water jacket and cooling water roller, prevent the precipitation of compounds, ensure uniform and dense crystals, improve the tensile strength and elongation of the steel strip, especially the elongation of the steel strip can be increased by 23%, achieve the stability of the steel strip structure, effectively prevent the precipitation of carbides, especially the solid solution treatment effect of stainless steel is very good. The surface defects of the steel strip are pressed by the upper and lower cooling water rollers, and at the same time play a leveling role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 : is the front view of the present invention;

[0020] Figure 3: is an exploded view of the cooler body of the present invention;

[0021] In the figure: 1-transition water jacket; 2-cooling water tank; 21-upper box plate; 22-lower box plate; 23-front box plate; 24-rear box plate; 25-left box plate; 26-right box plate; 3-motor; 4-sleeve shaft; 5-water outlet pipe; 6-lift limiter; 7-pass hole; 8-water inlet pipe; 9-cooling water roller; 10-gear; 11-left inner sleeve; 12-right inner sleeve; 13-upper inner sleeve; 14-lower inner sleeve; 15-steel belt inlet; 16-cooling water roller bearing seat. DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0023] like Figure 1 As shown, a stainless steel strip solution treatment cooler includes a transition water jacket 1 and a cooler body. The transition water jacket 1 is arranged at the front end of the cooler body, and is used to connect the annealing furnace and the cooler body, play a role in connecting the transition, blocking the heat radiation in the furnace, and guiding the stainless steel strip to enter the cooler quickly and accurately.

[0024] like Figure 2 As shown, the transition water jacket 1 is a rectangular structure, and a conical passage hole 7 is opened inside. A sleeve shaft 4 is installed in the passage hole 7. The sleeve shaft 4 is preferably made of graphite. The steel strip coming out of the annealing furnace naturally sags at high temperature, and the steel strip is supported by the sleeve shaft 4 and sent to the cooler body. Both ends of the sleeve shaft 4 are fixedly installed on the transition water jacket 1 through a bearing seat, and cooling water is passed through the bearing seat to ensure safe operation between the bearing seat and the sleeve shaft 4 and prevent damage to the bearing seat due to excessive temperature.

[0025] like Figure 3 As shown, the cooler body includes a cooling water tank 2, a cooling water jacket, a ceiling 6, a cooling water roller 9, a gear 10 and a cooling water roller bearing seat 16. The cooling water tank 2 includes an upper box plate 21, a lower box plate 22, a front box plate 23, a rear box plate 24, a left box plate 25 and a right box plate 26. The upper box plate 21 and the lower box plate 22 are arranged opposite to each other, and the left box plate 25 and the right box plate 26 are arranged on both sides and welded to form a box structure; the top surface of the upper box plate 21 is provided with a water outlet pipe 5; the bottom surface of the lower box plate 22 is provided with a water inlet pipe 8; the front box plate 23 is provided with a steel belt inlet 15, and the rear box plate 24 is provided with a steel belt outlet. The cooling water tank 2 is a double-layer box filled with water to reduce the temperature of the box.

[0026] The cooling water tank 2 is provided with a cooling water jacket, which includes a left inner jacket 11, a right inner jacket 12, an upper inner jacket 13 and a lower inner jacket 14. The upper inner jacket 13 and the lower inner jacket 14 are both wavy and arranged opposite to each other, connected with the left inner jacket 11 and the right inner jacket 12 arranged on both sides, and welded with the inner wall of the cooling water tank 2 to form a cavity, forming a cooling water loop between the cooling water jacket and the cooling water tank 2, which is filled with flowing cooling water. The cooling water enters through the water inlet pipe 8 and flows out from the water outlet pipe 5. The wavy design of the upper inner jacket 13 and the lower inner jacket 14 increases the heat absorption area and absorbs the internal heat. After the cooling water jacket is manufactured, a water pressure test should be performed to ensure that there is no air leakage.

[0027] The cooling water jacket is provided with a number of cooling water rollers 9, which are arranged in layers, and the number is preferably 9, and more preferably four on the top and five on the bottom, and there is a common tangent line between the cooling water rollers 9. The cooling water rollers 9 are hollow structures, and cooling water flows inside; the two ends of the cooling water rollers 9 are fixed by cooling water roller bearing seats 16, and the cooling water roller bearing seats 16 are arranged in the same number and distribution as the cooling water rollers 9, and are fixedly installed on the positioning plate, which plays the role of supporting the rotation of the cooling water rollers 9. At the same time, the cooling water roller bearing seats 16 are equipped with double seals inside, which effectively prevent the leakage of hydrogen in the annealing furnace and prevent fire caused by hydrogen leakage. The positioning plate is embedded in the right box plate 26 and fixedly connected by bolts. A ceiling limiter 6 is also provided on the top of the positioning plate to adjust the up and down movement of the cooling water rollers 9 to play the role of deviation correction.

[0028] The cooling water roller 9 passes through the cooling water roller bearing seat 16 and is equipped with a gear 10 at one end. The gear 10 drives the cooling water roller 9 to rotate synchronously through the motor 3, so that the cooling water roller 9 rotates to contact the steel strip, and the steel strip at about 1100°C is quickly cooled at a speed of 140°C / second to prevent the precipitation of compounds, ensure the uniformity and density of the crystals, improve the tensile strength and elongation, achieve a stable steel strip structure, and effectively prevent the precipitation of carbides. At the same time, the surface defects of the steel strip are pressed by the upper and lower cooling water rollers 9 to play a leveling role.

[0029] Specifically, the solid solution treatment of stainless steel is carried out under the protection of hydrogen, and the heat treatment of steel strips must go through the process of heating up the annealing furnace, heat preservation, and cooling. The steel strip is heated to about 1100°C in the furnace, enters the transition water jacket 1, and the variable frequency speed regulating motor drives the sleeve shaft 4 to rotate, and the steel strip is transported to the cooler body. The motor 3 drives the cooling water roller 9 to rotate through the gear 10. The steel strip is quickly cooled to below 350°C through the cooling water roller 9, and the defects are corrected under the leveling effect of the cooling water roller 9 before being output from the cooler body. The steel plate is then slowly cooled to room temperature by the fan and rolled into the warehouse.

[0030] The present invention can quickly cool down any high-temperature steel strip after it passes through the low-temperature effect of the cooling water tank 2, the cooling water jacket and the cooling water roller 9. At the same time, the cooling speed can be controlled by controlling the amount of steel passing through, or reducing the cooling water temperature and the cooling water flow rate. The design is reasonable, safe and reliable, and the quality is stable. Each component has high precision and good air tightness. It plays a role in rapid cooling in continuous operation, effectively improving the strength, elongation and hardness of the steel strip, especially the elongation of the steel strip can be increased by 23%, especially the solid solution treatment effect of stainless steel is very good. While the stainless steel strip is rapidly cooled, the surface defects of the stainless steel strip are repaired and leveled.

[0031] It should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations of the present invention.

[0032] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other substitutions, modifications, combinations, changes, simplifications, etc. made without departing from the spirit and principles of the present invention shall be equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. A stainless steel strip solution treatment cooler, characterized in that: It comprises a transition water jacket (1) and a cooler body, wherein the cooler body comprises a cooling water tank (2), a cooling water jacket, a cooling water roller (9), a gear (10) and a cooling water roller bearing seat (16); the cooling water tank (2) is provided with a cooling water jacket and is welded to the inner wall of the cooling water tank (2); the cooling water jacket is provided with a plurality of cooling water rollers (9), and the two ends of the cooling water rollers (9) are fixed by cooling water roller bearing seats (16); the cooling water roller (9) passes through one end of the cooling water roller bearing seat (16) and is provided with a gear (10); the front end of the cooler body is provided with a transition water jacket (1).

2. A stainless steel strip solution treatment cooler according to claim 1, characterized in that: The transition water jacket (1) is a rectangular structure and has a conical passage hole (7) formed inside. A sleeve shaft (4) is installed in the passage hole (7). Both ends of the sleeve shaft (4) are fixedly mounted on the transition water jacket (1) via bearing seats.

3. A stainless steel strip solution treatment cooler according to claim 2, characterized in that: Cooling water is passed through the bearing seat.

4. A stainless steel strip solution treatment cooler according to claim 1, characterized in that: The cooling water box (2) comprises an upper box plate (21), a lower box plate (22), a front box plate (23), a rear box plate (24), a left box plate (25) and a right box plate (26); the top surface of the upper box plate (21) is provided with a water outlet pipe (5); the bottom surface of the lower box plate (22) is provided with a water inlet pipe (8); the front box plate (23) is provided with a steel belt inlet (15), and the rear box plate (24) is provided with a steel belt outlet.

5. A stainless steel strip solution treatment cooler according to claim 1, characterized in that: The cooling water jacket comprises a left inner jacket (11), a right inner jacket (12), an upper inner jacket (13) and a lower inner jacket (14); the upper inner jacket (13) and the lower inner jacket (14) are arranged opposite to each other and connected to the left inner jacket (11) and the right inner jacket (12) arranged on both sides.

6. A stainless steel strip solution treatment cooler according to claim 5, characterized in that: The upper inner sleeve (13) and the lower inner sleeve (14) are both wavy in shape.

7. A stainless steel strip solution treatment cooler according to claim 1, characterized in that: The number of the cooling water rollers (9) is 9 and they are arranged in layers.

8. A stainless steel strip solution treatment cooler according to claim 7, characterized in that: There is a common tangent line between the cooling water rollers (9).

9. A stainless steel strip solution treatment cooler according to any one of claims 7 or 8, characterized in that: The cooling water roller (9) is a hollow structure with cooling water flowing inside.

10. The stainless steel strip solution treatment cooler according to claim 1, characterized in that: The cooling water roller bearing seat (16) is fixedly mounted on a positioning plate, and a ceiling limiter (6) is also provided on the top of the positioning plate.

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