Stainless steel plate continuous production line and production method

Abstract

The present invention relates to a continuous production line and production method for stainless steel plates, in which a heating zone, a rolling zone, a heat treatment zone, a finishing zone and a pickling zone are sequentially connected and arranged along the running direction of the plates to form a continuous production line. The present invention rationally connects the traditional rolling line, heat treatment line, shearing line and pickling line together, improves the problem of frequent transportation of steel plates in each process processing line, saves the time of steel plates going online and offline in each process processing line, effectively shortens the product production cycle, and improves the production capacity of the production line; in the present invention, the steel plate can be hot-loaded into the solution treatment furnace at a higher temperature for solution treatment, which not only saves the cold loading heating time and shortens the production cycle, but also makes full use of the residual heat of the steel plate after rolling, improves the gas utilization rate, reduces energy consumption, and reduces carbon emissions.

Description

Technical Field

[0001] The invention relates to a continuous production line and a production method for stainless steel plates. Background Art

[0002] At present, the steel industry has a large amount of carbon emissions, and there is an urgent need to develop new low-energy, green steel production technologies.

[0003] Stainless steel plates have the advantages of good corrosion resistance, stable mechanical properties, and good hot processing performance. They are widely used in construction, shipbuilding, energy, chemical industry, medical and other fields. Austenitic stainless steel is the type of stainless steel product with the largest market demand, accounting for about 70% of the total stainless steel. In order to ensure the good corrosion resistance of austenitic stainless steel, the rolled steel plate needs to undergo heat treatment processes such as solution and quenching. The current austenitic stainless steel plate production line includes a hot rolling line and a heat treatment line. The hot-rolled stainless steel slab rolled to the target thickness needs to be cooled to a lower temperature on the cooling bed and then transferred to the heat treatment line for solution and quenching treatment; the production of stainless steel plates requires frequent cooling-unloading-transfer-loading-heating processes, so the traditional stainless steel production line has the problems of long production cycle and high energy consumption. Summary of the invention

[0004] The invention relates to a continuous production line and a production method for stainless steel plates, which can at least solve some defects of the prior art.

[0005] The present invention relates to a continuous production line for stainless steel plates, comprising a heating zone, a rolling zone, a heat treatment zone, a finishing zone and a pickling zone, wherein the heating zone, the rolling zone, the heat treatment zone, the finishing zone and the pickling zone are sequentially connected and arranged along the running direction of the plates to form a continuous production line;

[0006] The heat treatment zone is arranged with at least one heat treatment unit. When there are multiple heat treatment units, the heat treatment units are arranged in sequence along the transverse direction of the production line, and each heat treatment unit includes a solution treatment furnace and a cooling device arranged in sequence along the longitudinal direction of the production line;

[0007] The pickling area is arranged with at least one pickling unit. When there are multiple pickling units, the pickling units are arranged in sequence along the transverse direction of the production line. Each pickling unit includes a pre-pickling descaling device and a pickling device arranged in sequence along the longitudinal direction of the production line.

[0008] As one of the embodiments, when the heat treatment zone is arranged with a plurality of heat treatment units, a plate traverse mechanism is respectively provided at the inlet section and the outlet section of the heat treatment zone;

[0009] When the pickling zone is arranged with a plurality of pickling units, a plate traverse mechanism is respectively provided at the inlet section and the outlet section of the pickling zone.

[0010] As one of the implementation modes, a plurality of plate cutting units are sequentially arranged in the finishing area along the transverse direction of the production line, and a plate transverse movement mechanism is arranged at the entrance section of the finishing area.

[0011] As one of the implementation modes, the number of the pickling units is not less than the number of the plate cutting units, and each of the plate cutting units is directly connected to a pickling unit.

[0012] As one of the implementation modes, a cold straightening machine is further arranged at the entrance section of the finishing zone, and the plate transverse movement mechanism at the entrance section of the finishing zone is located downstream of the cold straightening machine.

[0013] As one of the embodiments, the heating zone, the rolling zone and the heat treatment zone are arranged as a first production line section, the finishing zone and the pickling zone are arranged as a second production line section, the first production line section and the second production line section are distributed side by side along the transverse direction of the production line, and the first production line section and the second production line section are connected by a plate transverse movement mechanism.

[0014] As one of the embodiments, a loading and unloading device is provided at least one of the inlet side of the heat treatment zone, the outlet side of the heat treatment zone, the inlet side of the finishing zone, and the inlet side of the pickling zone.

[0015] The present invention also relates to a method for continuous production of stainless steel plates, comprising:

[0016] The continuous casting slab is transported to a heating zone for heating;

[0017] The continuous casting slab output from the heating zone is hot transported to the rolling zone, where the continuous casting slab is rolled into an intermediate slab and the rolled mother slab is cut into multiple sub-slabs, which are straightened by a hot straightening machine;

[0018] The steel plates output from the rolling area are directly sent to the heat treatment area, where the sub-plates are solution treated and the solution treated steel plates are quickly cooled to the target temperature;

[0019] The steel plates output from the heat treatment area are directly sent to the finishing area for finishing treatment;

[0020] The steel plates output from the finishing area are directly sent to the pickling area for pickling treatment. After pickling, the finished plates are obtained and collected offline.

[0021] As one of the implementation modes, when the thickness of the target finished plate is within the first thickness range, in the rolling zone, the continuous casting billet is rolled into an intermediate billet by a flat rolling mode; when the thickness of the target finished plate is within the second thickness range, in the rolling zone, the continuous casting billet is rolled into an intermediate billet by a flat rolling-coiling mode, and during the rolling process, the intermediate billet is allowed to enter the front coiling furnace and the rear coiling furnace to reduce the temperature drop.

[0022] As one of the embodiments, in the heating zone, the continuous casting billet is heated to 1150° C. to 1210° C. and kept at this temperature for 2 to 4 hours;

[0023] In the heat treatment zone, the temperature of the solution treatment furnace is set to 1030-1150°C, and the steel plate is kept in the furnace for 0.5-60 min.

[0024] The present invention has at least the following beneficial effects:

[0025] The present invention rationally connects the traditional rolling line, heat treatment line, shearing line and pickling line together, improves the problem of frequent transportation of steel plates in each process processing line, saves the time of steel plates going online and offline in each process processing line, effectively shortens the product production cycle, and improves the production capacity of the production line.

[0026] In the present invention, the steel plate can be hot-charged into the solution treatment furnace at a relatively high temperature for solution treatment, which not only saves the cold charging heating time and shortens the production cycle, but also makes full use of the residual heat of the steel plate after rolling, improves the gas utilization rate, reduces energy consumption, and reduces carbon emissions.

[0027] In the present invention, by configuring the number of heat treatment units, pickling units, etc., the production rhythm of rolling, heat treatment, finishing, pickling and other process sections can be efficiently matched, the equipment capacity can be fully utilized, and the production line can be guaranteed to produce stainless steel plate products with excellent performance with lower energy consumption and shorter production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of a continuous production line for stainless steel plates provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] like Figure 1The embodiment of the present invention provides a continuous production line for stainless steel plates, comprising a heating zone 100, a rolling zone 200, a heat treatment zone 300, a finishing zone 400 and a pickling zone 500, wherein the heating zone 100, the rolling zone 200, the heat treatment zone 300, the finishing zone 400 and the pickling zone 500 are sequentially connected and arranged along the running direction of the plates to form a continuous production line;

[0033] The heat treatment zone 300 is arranged with at least one heat treatment unit. When there are multiple heat treatment units, the heat treatment units are arranged in sequence along the transverse direction of the production line. Each heat treatment unit includes a solution treatment furnace 301 and a cooling device 302 arranged in sequence along the longitudinal direction of the production line.

[0034] The pickling area 500 is arranged with at least one pickling unit. When there are multiple pickling units, the pickling units are arranged in sequence along the transverse direction of the production line. Each pickling unit includes a pre-pickling descaling device 502 and a pickling device 501 arranged in sequence along the longitudinal direction of the production line.

[0035] A heating device is arranged in the heating zone 100 to heat the continuous casting billet. The heating device includes but is not limited to a heating furnace 101 .

[0036] The heating zone 100 and the rolling zone 200 can be connected by means of conveying rollers or the like (for example, the rollers behind the furnace extend into the rolling zone 200 ), and the continuous casting billets output from the heating zone 100 can be directly hot-transported into the rolling zone 200 .

[0037] In the rolling zone 200, the continuous casting billet can be rolled, and the rolling mill 202 arranged in the rolling zone 200 includes but is not limited to a four-roll reversible rolling mill 202. Furthermore, the rolling zone 200 is also arranged with a pre-rolling descaling device 201, which can remove the iron oxide scale on the surface of the continuous casting billet; the pre-rolling descaling device 201 includes but is not limited to a high-pressure water descaling device, and optionally, the high-pressure water pressure is 30-35MPa.

[0038] Furthermore, the rolling zone 200 is also provided with a post-rolling shearing device 205, which can cut the post-rolling mother plate into a plurality of sub-plates, and the post-rolling mother plate can also directly pass through the shearing device.

[0039] Furthermore, the rolling zone 200 is also provided with a hot straightening machine 206, which can perform straightening treatment on the cut sub-plates.

[0040] In one embodiment, in the rolling zone 200, the continuous casting slab is rolled into an intermediate slab by a flat rolling mode; in another embodiment, in the rolling zone 200, the continuous casting slab is rolled into an intermediate slab by a flat rolling-coil rolling mode. The former method is more suitable for the case where the target finished plate has a larger plate thickness, and the latter method is more suitable for the case where the target finished plate has a smaller plate thickness. A plate thickness threshold can be set, and the flat rolling mode is used when the plate thickness of the target finished plate is within a first plate thickness range, and the flat rolling-coil rolling mode is used when the plate thickness of the target finished plate is within a second plate thickness range.

[0041] Preferably, during the rolling process, the intermediate billet is allowed to enter the front coiling furnace 203 and the rear coiling furnace 204 to reduce the temperature drop; accordingly, Figure 1 In the rolling area 200, an organic front coiling furnace 203 and a rear coiling furnace 204 are arranged before and after the rolling mill 202, respectively.

[0042] For the flat rolling mode, it means that no coiling furnace is used in the rolling process, and the steel billet is always rolled and deformed in a plate-like shape; for the flat rolling-coil rolling mode, it means that during the rolling process, after the continuous casting billet has undergone several passes of flat rolling, the intermediate billet begins to enter the coiling furnace, and in several rolling passes before the last pass, the intermediate billet after rolling enters the coiling furnace, and the pass entering the coiling furnace can be determined according to factors such as the thickness of the intermediate billet.

[0043] Further preferably, two rolling mills 202 are arranged in the rolling area 200, and the two rolling mills 202 are arranged in sequence along the longitudinal direction of the production line, so as to achieve a higher rolling effect and production flexibility for the continuous casting billet. In the case of arranging an organic front coiling furnace 203 and a rear coiling furnace 204, the front coiling furnace 203 is preferably arranged between the two rolling mills 202, so that rolling production of various rolling modes can be realized in the rolling area 200, with a wider range of applications and higher production flexibility.

[0044] In the rolling zone 200, the front and rear equipment are preferably connected by a conveyor roller; wherein the conveyor roller between the pre-rolling descaling device 201 and the front coiling furnace 203 is provided with a heat preservation cover; and the conveyor roller between the rear coiling furnace 204 and the heat treatment zone 300 is also preferably provided with a heat preservation cover.

[0045] In the heat treatment area 300, the number of heat treatment units is preferably in the range of 1 to 4; preferably, a plurality of heat treatment units are arranged to better match the production rhythm of the previous and subsequent processes and ensure smooth production.

[0046] Preferably, if Figure 1When the heat treatment zone 300 is provided with a plurality of heat treatment units, a plate transverse movement mechanism 600 is provided at the inlet section and the outlet section of the heat treatment zone 300, respectively. The plate transverse movement mechanism 600 can deliver the plate input from the inlet side of the heat treatment zone 300 to the corresponding solution treatment furnace 301, and can deliver the plate output from each heat treatment unit to the outlet of the heat treatment zone 300. The plate transverse movement mechanism 600 can adopt a plate transverse movement machine, a transverse movement roller and the like.

[0047] The solution treatment furnace 301 and the cooling device 302 are arranged adjacent to each other. The plate after solution treatment in the solution treatment furnace 301 enters the cooling device 302 for rapid cooling. The distance between the solution treatment furnace 301 and the cooling device 302 can be determined and adjusted according to the process requirements.

[0048] A plate cutting unit is arranged in the finishing area 400, and the plate cutting unit can be used to trim and / or cut the plate to length by shearing 403. For example, the plate cutting unit includes a trimming shear 402 and a length shear 403 arranged in sequence along the longitudinal direction of the production line. The number of plate cutting units can be in the range of 1 to 3.

[0049] Preferably, if Figure 1 The entrance section of the finishing zone 400 is also provided with a cold straightening machine 401 , which can perform cold straightening on the plates entering the finishing zone 400 . The plate transverse movement mechanism 600 at the entrance section of the finishing zone 400 is located downstream of the cold straightening machine 401 .

[0050] In one embodiment, if Figure 1 In the finishing area 400, a plurality of plate cutting units are sequentially arranged along the transverse direction of the production line, and a plate transverse movement mechanism 600 is arranged at the entrance section of the finishing area 400. The plate transverse movement mechanism 600 can deliver the plate input at the entrance section of the finishing area 400 into the corresponding plate cutting unit.

[0051] Preferably, if Figure 1 The number of the pickling units is not less than the number of the plate cutting units, and each of the plate cutting units is directly connected to a pickling unit, for example, the outlet side conveying roller of the plate cutting unit extends to the corresponding pickling unit.

[0052] In the pickling area 500, the number of pickling units is preferably in the range of 1 to 4; preferably, multiple pickling units are arranged to better match the production rhythm of the previous and subsequent processes to ensure smooth production.

[0053] Furthermore, if Figure 1When the pickling area 500 is arranged with multiple pickling units, a plate transverse movement mechanism 600 is respectively provided at the entrance section and the exit section of the pickling area 500. The plate transverse movement mechanism 600 can deliver the plate input from the entrance side of the pickling area 500 to the corresponding pickling unit, and can deliver the plate output from each pickling unit to the exit of the pickling area 500.

[0054] The pre-pickling descaling device 502 includes but is not limited to descaling equipment such as a shot blasting machine.

[0055] A finished product off-line device 800 is provided at the outlet side of the pickling area 500, and the finished product off-line device 800 can adopt a plate off-line equipment such as a vacuum suction cup loading and unloading device 700.

[0056] In one embodiment, if Figure 1 The heating zone 100, the rolling zone 200 and the heat treatment zone 300 are arranged as a first production line section, the finishing zone 400 and the pickling zone 500 are arranged as a second production line section, the first production line section and the second production line section are arranged side by side along the transverse direction of the production line, and the first production line section and the second production line section are connected by a plate transverse movement mechanism 600. This method can facilitate the layout of the production line and save the longitudinal area occupied by the production line.

[0057] The first production line section and the second production line section are connected by a plate transverse movement mechanism 600, that is, the heat treatment zone 300 and the finishing zone 400 are connected by the plate transverse movement mechanism 600; in the case where the outlet section of the heat treatment zone 300 is provided with a plate transverse movement mechanism 600, two sets of plate transverse movement equipment can cooperate to complete the transfer of the plates, or the plates output by the heat treatment unit can be sent to the finishing zone 400 by the same set of plate transverse movement equipment.

[0058] In one embodiment, if Figure 1 , at least one of the inlet side of the heat treatment zone 300, the outlet side of the heat treatment zone 300, the inlet side of the finishing zone 400, and the inlet side of the pickling zone 500 is provided with a loading and unloading device 700. By providing the loading and unloading device 700, the production pace of the upstream and downstream processes can be well coordinated to ensure smooth production; for example, when the output of the rolling zone 200 is higher than the processing capacity of the heat treatment zone 300, the excess steel plate is taken off the line through the loading and unloading device 700 on the inlet side of the heat treatment zone 300, and vice versa, the loading and unloading device 700 is used for loading; for example, when the output of the heat treatment zone 300 is higher than the processing capacity of the finishing zone 400, the excess steel plate is taken off the line through the loading and unloading device 700 on the outlet side of the heat treatment zone 300 or the loading and unloading device 700 on the inlet side of the finishing zone 400, and vice versa, the loading and unloading device 700 is used for loading.

[0059] Embodiment 2

[0060] An embodiment of the present invention provides a method for continuous production of a stainless steel plate, comprising:

[0061] (1) conveying the continuous casting slab to the heating zone 100 for heating;

[0062] Specifically, the stainless steel continuous casting billet is heated to a temperature above the austenitization temperature and the dissolution temperature of the alloy carbides in the billet by the heating furnace 101; then, the billet is kept warm for a period of time in the heating furnace 101 to fully dissolve the alloy carbides in the continuous casting billet;

[0063] In one embodiment, in the heating zone 100, the continuous casting billet is heated to 1150°C to 1210°C and kept at this temperature for 2 to 4 hours.

[0064] (2) The continuous casting slab output from the heating zone 100 is hot transported to the rolling zone 200. In the rolling zone 200, the continuous casting slab is rolled into an intermediate slab and the rolled mother slab is cut into a plurality of sub-slabs. The sub-slabs are straightened by a hot straightening machine 206.

[0065] As described above, in the rolling zone 200, rolling modes such as flat rolling mode and flat rolling-coiling mode can be implemented. For example, when the thickness of the target finished plate is within the first plate thickness range, in the rolling zone 200, the continuous casting billet is rolled into an intermediate billet by adopting the flat rolling mode; when the thickness of the target finished plate is within the second plate thickness range, in the rolling zone 200, the continuous casting billet is rolled into an intermediate billet by adopting the flat rolling-coiling mode. In one embodiment, when the thickness of the target finished plate is greater than 20 mm, the rolling adopts the flat rolling mode; when the thickness of the target finished plate is ≤12 mm, the rolling adopts the flat rolling-coiling mode; when the thickness of the target finished plate is between 12 and 20 mm, the rolling may adopt the flat rolling mode or the flat rolling-coiling mode.

[0066] Preferably, in the flat rolling-coil rolling mode, the thickness of the intermediate billet initially entering the coiling furnace is controlled within the range of 15-25 mm.

[0067] In one embodiment, the length of the sub-board is 20-56 m, and the number of sub-boards after segmentation is ≤12.

[0068] (3) The steel plate output from the rolling zone 200 is directly sent to the heat treatment zone 300, where the sub-plate is subjected to a solid solution treatment, and the steel plate after the solid solution treatment is rapidly cooled to a target temperature;

[0069] Specifically, the steel plate enters the solution treatment furnace 301, is heated to the solution temperature and kept warm for a period of time; wherein the heating temperature is higher than the dissolution temperature of the alloy carbide and lower than the rapid grain growth temperature. The steel plate that has completed the solution treatment enters the cooling device 302, and is rapidly cooled to below the precipitation temperature of the high chromium alloy carbide, thereby inhibiting the precipitation of the high chromium alloy carbide. In addition, the temperature of the steel plate after cooling needs to meet the temperature requirements of the pickling plate.

[0070] The time of the steel plate in the furnace is the sum of the heating time and the holding time. The heating time is related to the temperature of the steel plate entering the furnace and the thickness of the steel plate. The holding time should ensure that the alloy carbides are fully dissolved. According to the time of the steel plate in the furnace, the heating and holding method of the steel plate in the solution treatment furnace 301 can be selected as a traveling type or a swinging type.

[0071] Based on the above scheme, the steel plate can be hot-charged at a higher temperature into the solution treatment furnace 301 for solution treatment, which not only saves the cold charging heating time and shortens the production cycle, but also makes full use of the residual heat of the steel plate after rolling, improves the gas utilization rate, reduces energy consumption, and reduces carbon emissions.

[0072] In one embodiment, the temperature of the solution treatment furnace 301 is set to 1030-1150°C, and the steel plate is in the furnace for 0.5-60 minutes; the cooling device 302 is used to quickly cool the steel plate to below 150°C.

[0073] (4) The steel plates output from the heat treatment zone 300 are directly sent to the finishing zone 400 for finishing treatment;

[0074] In one embodiment, the trimming amount of the steel plate is 30-150 mm.

[0075] (5) The steel plates output from the finishing area 400 are directly sent to the pickling area 500 for pickling treatment. After the pickling is completed, the finished plates are obtained and collected offline.

[0076] In one embodiment, the steel plate travels at a speed of 2-6 m / min in the pickling device 501 .

[0077] Through the above production method, the continuous casting billet with a thickness of 80-360 mm can be used to manufacture the stainless steel pickling plate with a thickness of 2-120 mm.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous production line for stainless steel plates, characterized in that: It includes a heating zone, a rolling zone, a heat treatment zone, a finishing zone and a pickling zone, wherein the heating zone, the rolling zone, the heat treatment zone, the finishing zone and the pickling zone are sequentially connected and arranged along the running direction of the plate to form a continuous production line; Among them, the continuous casting slabs output from the heating zone are directly hot-sent to the rolling zone, the steel plates output from the rolling zone are directly sent to the heat treatment zone, the steel plates output from the heat treatment zone are directly sent to the finishing zone, and the steel plates output from the finishing zone are directly sent to the pickling zone; The heat treatment zone is arranged with a plurality of heat treatment units, each of which is arranged in sequence along the transverse direction of the production line, and each of which includes a solution treatment furnace and a cooling device arranged in sequence along the longitudinal direction of the production line; a plate transverse movement mechanism is respectively provided at the inlet section and the outlet section of the heat treatment zone, for delivering the plate inputted from the inlet side of the heat treatment zone into the corresponding solution treatment furnace, and delivering the plate outputted from each heat treatment unit to the outlet of the heat treatment zone; The pickling area is provided with a plurality of pickling units, each of which is arranged in sequence along the transverse direction of the production line, and each of which comprises a pre-pickling descaling device and a pickling device arranged in sequence along the longitudinal direction of the production line; a plate transverse shifting mechanism is respectively provided at the inlet section and the outlet section of the pickling area, which is used to send the plate input from the inlet side of the pickling area into the corresponding pickling unit, and to send the plate output from each pickling unit to the outlet of the pickling area; The rolling area is provided with two four-roller reversible rolling mills, the two rolling mills are arranged in sequence along the longitudinal direction of the production line, an organic front coiling furnace is arranged between the two rolling mills, and an organic rear coiling furnace is arranged at the exit side of the second rolling mill; In the finishing area, a plurality of plate cutting units are sequentially arranged along the transverse direction of the production line, and a plate transverse movement mechanism is arranged at the entrance section of the finishing area. The number of the pickling units is not less than the number of the plate cutting units, and each of the plate cutting units is directly connected to a pickling unit; At least one of the inlet side of the heat treatment zone, the outlet side of the heat treatment zone, the inlet side of the finishing zone and the inlet side of the pickling zone is provided with a loading and unloading device.

2. The continuous production line for stainless steel plates according to claim 1, characterized in that: The entrance section of the finishing zone is also provided with a cold straightening machine, and the plate transverse movement mechanism of the entrance section of the finishing zone is located downstream of the cold straightening machine.

3. The continuous production line for stainless steel plates according to claim 1, characterized in that: The heating zone, the rolling zone and the heat treatment zone are arranged as a first production line section, the finishing zone and the pickling zone are arranged as a second production line section, the first production line section and the second production line section are distributed side by side along the transverse direction of the production line, and the first production line section and the second production line section are connected by a plate transverse movement mechanism.

4. A method for continuous production of stainless steel plates, characterized in that: Based on the implementation of the stainless steel plate continuous production line according to any one of claims 1 to 3, the method comprises: The continuous casting slab is transported to a heating zone for heating; The continuous casting slab output from the heating zone is hot transported to the rolling zone, where the continuous casting slab is rolled into an intermediate slab and the rolled mother slab is cut into multiple sub-slabs, which are straightened by a hot straightening machine; The steel plates output from the rolling area are directly sent to the heat treatment area, where the sub-plates are solution treated and the solution treated steel plates are quickly cooled to the target temperature; The steel plates output from the heat treatment area are directly sent to the finishing area for finishing treatment; The steel plates output from the finishing area are directly sent to the pickling area for pickling treatment. After the pickling is completed, the finished plates are obtained and collected offline; When the thickness of the target finished plate is within the first thickness range, the flat rolling mode is used in the rolling zone to roll the continuous casting billet into an intermediate billet; when the thickness of the target finished plate is within the second thickness range, the flat rolling-coiling mode is used in the rolling zone to roll the continuous casting billet into an intermediate billet, and during the rolling process, the intermediate billet is allowed to enter the front coiling furnace and the rear coiling furnace to reduce the temperature drop.

5. The method for continuous production of stainless steel sheets according to claim 4, characterized in that: In the heating zone, the continuous casting billet is heated to 1150°C to 1210°C and kept at this temperature for 2 to 4 hours; In the heat treatment zone, the temperature of the solution treatment furnace is set at 1030-1150°C, and the steel plate is kept in the furnace for 0.5-60 min.

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