CN111941003A - Preparation method of warm-rolled stainless steel/carbon steel composite plate - Google Patents
Preparation method of warm-rolled stainless steel/carbon steel composite plate Download PDFInfo
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- CN111941003A CN111941003A CN202010681469.1A CN202010681469A CN111941003A CN 111941003 A CN111941003 A CN 111941003A CN 202010681469 A CN202010681469 A CN 202010681469A CN 111941003 A CN111941003 A CN 111941003A
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- 239000002131 composite material Substances 0.000 title claims abstract description 64
- 239000010935 stainless steel Substances 0.000 title claims abstract description 55
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 55
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 54
- 239000010962 carbon steel Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 230000009467 reduction Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 11
- 238000009792 diffusion process Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 238000004381 surface treatment Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract description 3
- 239000011651 chromium Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000012805 post-processing Methods 0.000 claims description 2
- 238000003303 reheating Methods 0.000 claims description 2
- 241000221535 Pucciniales Species 0.000 claims 1
- 230000004888 barrier function Effects 0.000 claims 1
- 239000010963 304 stainless steel Substances 0.000 description 9
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 9
- 238000005097 cold rolling Methods 0.000 description 5
- 238000005098 hot rolling Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to the technical field of composite board production, in particular to a preparation method of a warm-rolled stainless steel/carbon steel composite board. The method comprises the steps of performing surface treatment on selected stainless steel plate blanks and carbon steel plate blanks, coating an anti-seepage layer on one side of the stainless steel and carbon steel in composite contact, drying at room temperature, oppositely and symmetrically assembling the two blanks, welding and sealing the periphery of the combined composite blank, vacuumizing, rolling the composite blank in a heating furnace for multiple times, cooling in air after rolling, and performing section leveling treatment. According to the invention, the stainless steel is protected by coating the anti-seepage layer on the stainless steel plate blank, a specific heating temperature interval and heat preservation time, and the performance reduction of the composite plate caused by element diffusion in the rolling process is avoided. The impervious layer effectively avoids mutual diffusion of Cr and C elements during rolling at high temperature.
Description
Technical Field
The invention relates to the technical field of composite board production, in particular to a preparation method of a warm-rolled stainless steel/carbon steel composite board.
Background
The current stainless steel-carbon steel composite plate not only can show the corrosion resistance, wear resistance, heat resistance and other stainless steel characteristics of stainless steel, but also has higher formability, ductility and thermal conductivity of carbon steel. The stainless steel carbon steel composite board can greatly save precious metal elements (Cr and Ni) in the stainless steel, reduce the production cost and improve the performance. At present, stainless steel carbon steel composite plates are widely applied to key fields of pressure vessels, petroleum pipelines, seawater desalination equipment, automobile manufacturing and the like.
However, the rolling process for the stainless steel carbon steel composite plate comprises cold rolling and hot rolling. The rolling force of a rolling mill required for cold rolling the manufactured clad plate is particularly large, and the cold hardening caused by the continuous cold deformation of the rolled clad plate increases the strength and hardness of the plate and decreases the ductile-plastic index, so that the stamping performance is deteriorated and the clad plate can be used only for parts with simple deformation. The hot-rolled composite plate has low surface strength, poor quality, good plasticity and larger thickness. The method for preparing the stainless steel carbon steel composite plate by warm rolling can avoid cold work hardening caused by too low plate temperature during rolling and reduce the influence on the reduction of the surface strength of the composite plate during hot rolling.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for preparing a stainless steel-carbon steel composite plate by a warm rolling composite process of adding an element impermeable layer in the middle of the stainless steel-carbon steel composite plate, and the impermeable layer adding technology is adopted to solve the problem of diffusion of Cr and C elements on two sides of a composite interface between stainless steel and carbon steel so as to improve the overall performance of the stainless steel-carbon steel composite plate.
The technical scheme of the invention is realized as follows: the utility model provides a wear-resisting steel ball for ball mill which characterized in that: the method comprises the following steps:
s1), preparing a stainless steel carbon steel composite blank:
selecting a stainless steel and carbon steel plate-shaped blank with a certain size, wherein the thickness of the selected stainless steel plate is more than 2mm, the thickness of the selected carbon steel plate is more than 5mm, carrying out surface treatment on the stainless steel and carbon steel blank, removing an oxide layer, rust, grease and the like on the surface, polishing corners of the blank, and removing burrs to ensure that the whole blank is smooth and flat;
s2), adding a composite blank middle layer and assembling:
selecting proper stainless steel and carbon steel surfaces, coating an anti-seepage coating on the surfaces which are mutually contacted, drying the surfaces in a clean space at room temperature, and aligning the two blanks for assembly after the coating is dried;
s3), welding and sealing the blank:
welding and sealing the periphery of the selected composite blank of stainless steel and carbon steel, leaving a vacuumizing area at the last welding position for extracting gap gas between the composite blanks, and welding and sealing the non-welding area after vacuumizing is finished;
s4), heating and heat preservation treatment of the composite blank:
placing the composite blank in a heating furnace for heating → heat preservation → reheating → heat preservation again, wherein the first heating temperature is 400-500 ℃, the heat preservation time is 20-30 min, the second heating temperature is 500-600 ℃, and the heat preservation time is 30-50 min;
s5), rolling treatment of the composite blank:
and taking out the heat-preserved composite blank to perform multi-pass rolling, wherein the rolling reduction of the first pass is required to exceed 25%, the rolling reduction of the last pass is not more than 15%, the total rolling reduction is controlled to be 60-70%, the rolling speed is 0.1/s-0.5/s, and the composite blank is subjected to air cooling treatment after the rolling is finished.
S6), post-processing of the plate:
carrying out necessary post-treatment on the rolled composite plate, wherein the specific contents are as follows: flattening the rolled plate, cutting off redundant burrs, cutting and packaging the whole plate in equal size, and the like.
The impermeable coating in the step S2 is high temperature resistant and can control the diffusion of chromium element and carbon element between stainless steel and carbon steel.
The required vacuum degree of 10 is required in the step S3-3Pa。
The first rolling reduction in the S5 is 28%, the last rolling reduction is 13%, and the total reduction is controlled at 63% -68%.
The invention solves the defects in the background technology, improves the integral performance of the stainless steel carbon steel composite board,
has the following beneficial effects:
1. the process can reduce element diffusion on two sides of the composite interface, avoid the formation of a chromium-poor area and a decarburization area, and further improve the corrosion resistance and the interface bonding strength of the composite board;
2. according to the invention, the impermeable layer is used for protecting the stainless steel from being influenced by element diffusion in the compounding process, preventing the diffusion of elements such as Cr and C and the like, and avoiding the formation of chromium-poor areas and decarburization areas at two sides of a compounding interface, so that the overall performance of the plate is improved;
3. the invention has simple process and saves precious metals. Preparing a composite board by a method of adding an impermeable layer to avoid diffusion of partial elements;
4. the invention improves the combination property of the composite board by improving the process, and controls the temperature interval and the heat preservation time during rolling, particularly the method and the literature document of the composite board do not appear in the selected temperature interval and the heat preservation time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic illustration of the present invention as it is made;
Detailed Description
Example 1
Manufacturing of warm-rolled stainless steel carbon steel composite plate added with impermeable layer 304/Q235
As shown in fig. 1, a surface-treated 304 stainless steel plate blank is coated with an impermeable layer, the upper layer is a 304 stainless steel plate, the lower layer is a Q235 carbon steel plate, the stainless steel plate and the Q235 carbon steel plate are symmetrically combined together, the impermeable layer is arranged between the stainless steel and carbon steel interfaces, wherein the thickness of the 304 stainless steel plate is 3mm, the thickness of the Q235 steel plate is 27mm, the total thickness is 30mm, the length is 50mm, and the width is 25mm, the combined blank is vacuumized and seal-welded, placed in a heating furnace to be heated to 400 ℃, kept for 30min, heated to 550 ℃, kept for 40min, taken out from the heating furnace and rolled, the first pass reduction is 30%, the last pass reduction is 2%, the reductions are respectively 10mm, 4mm, 3mm and 1mm, and the total reduction is 60%.
The test performance of the stainless steel carbon steel composite board prepared by warm rolling in the embodiment is as follows: a mechanical property experiment is carried out according to the GB/T6396-2008 standard requirement, and the measured shear is 280MPa and the elongation is 38%. The shear strength requirement (210MPa) of the I-grade stainless steel composite plate in the national standard GB-T8165 is 30 percent higher.
The invention provides a principle of a warm-rolled stainless steel/carbon steel composite plate with reliable performance; the stainless steel is protected on the impermeable layer by warm rolling compounding, the assembly is formed by oppositely combining the stainless steel and the carbon steel in pairs, and the rolling temperature range (400-600 ℃) has obvious difference from the cold rolling and hot rolling temperatures (cold rolling is carried out at normal temperature, and hot rolling is carried out at 1100-1250 ℃) in the prior art. The coating adopted by the invention can play a role in preventing the Cr and the C from being diffused into the carbon steel at high temperature, prevent the Cr element in the stainless steel from being diffused into the carbon steel and prevent the C element in the carbon steel from being diffused into the stainless steel at high temperature, avoid the formation of chromium-poor areas and decarburization areas at two sides of a composite interface, has simple operation, and can reduce the problem of performance reduction caused by element diffusion, cold rolling and hot rolling under the working condition of the composite plate.
Example 2
Coating an impermeable layer on a 304 stainless steel plate blank subjected to surface treatment, wherein the upper layer is a 304 stainless steel plate, the lower layer is a Q235 carbon steel plate, the stainless steel plate and the carbon steel plate are symmetrically combined together, and the impermeable layer is arranged between the stainless steel and carbon steel interfaces, wherein the thickness of the 304 stainless steel plate is 3mm, the thickness of the Q235 steel plate is 27mm, the total thickness is 30mm, the length is 50mm, and the width is 25mm, vacuumizing and seal welding the combined blank, placing the blank in a heating furnace to heat to 450 ℃, keeping the temperature for 30min, heating to 550 ℃, keeping the temperature for 40min, taking out the blank from the heating furnace for rolling, the first pass of rolling is 30%, the last pass of rolling is 2%, the rolling amounts are respectively 10mm, 4mm, 3mm and 1mm, and the total rolling amount is 60%.
The test performance of the stainless steel carbon steel composite board prepared by warm rolling in the embodiment is as follows: a mechanical property experiment is carried out according to the GB/T6396-2008 standard requirement, and the measured shear is 280MPa and the elongation is 38%. The shear strength requirement (210MPa) of the I-grade stainless steel composite plate in the national standard GB-T8165 is 30 percent higher.
Example 3
Coating an impermeable layer on a 304 stainless steel plate blank subjected to surface treatment, wherein the upper layer is a 304 stainless steel plate, the lower layer is a Q235 carbon steel plate, the stainless steel plate and the carbon steel plate are symmetrically combined together, and the impermeable layer is arranged between the stainless steel and carbon steel interfaces, wherein the thickness of the 304 stainless steel plate is 3mm, the thickness of the Q235 steel plate is 27mm, the total thickness is 30mm, the length is 50mm, and the width is 25mm, vacuumizing and seal welding the combined blank, placing the blank in a heating furnace to be heated to 500 ℃, keeping the temperature for 30min, heating to 550 ℃, keeping the temperature for 40min, taking the blank out of the heating furnace for rolling, the first pass of rolling is 30%, the last pass of rolling is 2%, the rolling amounts are respectively 10mm, 4mm, 3mm and 1mm, and the total rolling amount is 60%.
The test performance of the stainless steel carbon steel composite board prepared by warm rolling in the embodiment is as follows: a mechanical property experiment is carried out according to the GB/T6396-2008 standard requirement, and the measured shear is 280MPa and the elongation is 38%. The shear strength requirement (210MPa) of the I-grade stainless steel composite plate in the national standard GB-T8165 is 30 percent higher.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The preparation method of the warm-rolled stainless steel/carbon steel composite plate is characterized by comprising the following steps of:
s1), preparation of composite blank: the method comprises the steps of carrying out surface treatment on stainless steel and carbon steel blanks, removing oxide layers, rusts and grease on the surfaces, polishing corners of the blanks, and removing burrs to ensure the smoothness and the flatness of the whole blanks;
s2), adding a composite blank middle layer and assembling: selecting proper stainless steel and carbon steel surfaces, coating an anti-seepage coating on the surfaces which are mutually contacted, drying the surfaces in a clean space at room temperature, and aligning the two blanks for assembly after the coating is dried;
s3), welding and sealing the blank: welding and sealing the periphery of the selected composite blank of stainless steel and carbon steel, leaving a vacuumizing area at the last welding position for extracting gap gas between the composite blanks, and welding and sealing the non-welding area after vacuumizing is finished;
s4), heating and heat preservation treatment of the composite blank: placing the composite blank in a heating furnace for heating → preserving heat → reheating → preserving heat again, wherein the heating temperature is 400-600 ℃, and the preserving heat time is 20-50 min;
s5), rolling treatment of the composite blank: and taking out the heat-preserved composite blank to perform multi-pass rolling, wherein the rolling reduction of the first pass is not lower than 25%, the rolling reduction of the last pass is not higher than 15%, the total rolling reduction is controlled at 60-70%, the rolling speed is 0.1-0.5/s, and the composite blank is subjected to air cooling treatment after the rolling is finished.
2. The method for preparing a warm-rolled stainless steel/carbon steel composite plate according to claim 1, wherein the thickness of the stainless steel plate blank used in the step S1 is greater than 2mm, and the thickness of the carbon steel plate blank is greater than 5 mm.
3. The method for preparing a warm-rolled stainless steel/carbon steel composite plate according to claim 1, wherein the barrier coating in the step S2 is resistant to high temperature and can control the diffusion of chromium and carbon between stainless steel and carbon steel.
4. The method for preparing a warm-rolled stainless steel/carbon steel composite plate according to claim 1, wherein the required vacuum degree of step S3 is 10-3Pa。
5. The method for preparing the warm-rolled stainless steel/carbon steel composite plate according to claim 1, wherein the first heating temperature in the step S4 is 400-500 ℃, and the heat preservation time is 20-30 min, and the second heating temperature is 500-600 ℃, and the heat preservation time is 30-50 min.
6. The method for preparing the warm-rolled stainless steel/carbon steel composite plate according to claim 1, wherein the rolling reduction of the first pass in the S5 is 28%, the rolling reduction of the last pass is 13%, and the total rolling reduction is controlled to be 63% -68%.
7. The method of making a warm rolled stainless steel/carbon steel composite panel according to claim 1, further comprising a post-processing step S6 of the panel including a flattening process of the panel, cutting off excess flash and equal-sized cutting and sealing of the entire panel.
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Cited By (6)
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| CN112548499A (en) * | 2020-12-05 | 2021-03-26 | 安徽宝恒新材料科技有限公司 | Processing method of three-layer composite steel plate |
| CN114273421A (en) * | 2021-12-22 | 2022-04-05 | 安徽工业大学 | Method for preparing carbon steel-stainless steel composite board for lining board in micro-oxidation atmosphere |
| CN114850217A (en) * | 2022-07-05 | 2022-08-05 | 太原理工大学 | Rolling method of corrugated stainless steel/carbon steel composite plate with controllable bending radius |
| CN115011773A (en) * | 2022-06-13 | 2022-09-06 | 北京科技大学 | Surface modified stainless steel/carbon steel laminated composite board and preparation method thereof |
| CN115058572A (en) * | 2022-06-13 | 2022-09-16 | 北京科技大学 | Stainless steel/carbon steel laminated composite board with interlayer and preparation method thereof |
| CN115958387A (en) * | 2022-11-28 | 2023-04-14 | 南京首勤特种材料有限公司 | Preparation method of stainless steel composite board, product and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112548499A (en) * | 2020-12-05 | 2021-03-26 | 安徽宝恒新材料科技有限公司 | Processing method of three-layer composite steel plate |
| CN114273421A (en) * | 2021-12-22 | 2022-04-05 | 安徽工业大学 | Method for preparing carbon steel-stainless steel composite board for lining board in micro-oxidation atmosphere |
| CN114273421B (en) * | 2021-12-22 | 2024-04-19 | 安徽工业大学 | Method for preparing carbon steel-stainless steel composite board for lining board in micro-oxidation atmosphere |
| CN115011773A (en) * | 2022-06-13 | 2022-09-06 | 北京科技大学 | Surface modified stainless steel/carbon steel laminated composite board and preparation method thereof |
| CN115058572A (en) * | 2022-06-13 | 2022-09-16 | 北京科技大学 | Stainless steel/carbon steel laminated composite board with interlayer and preparation method thereof |
| CN115058572B (en) * | 2022-06-13 | 2023-07-04 | 北京科技大学 | Stainless steel/carbon steel layered composite board added with intermediate layer and preparation method thereof |
| CN115011773B (en) * | 2022-06-13 | 2023-09-12 | 北京科技大学 | Surface modified stainless steel/carbon steel layered composite board and preparation method thereof |
| CN114850217A (en) * | 2022-07-05 | 2022-08-05 | 太原理工大学 | Rolling method of corrugated stainless steel/carbon steel composite plate with controllable bending radius |
| CN114850217B (en) * | 2022-07-05 | 2022-10-04 | 太原理工大学 | Rolling method of corrugated stainless steel/carbon steel composite plate with controllable bending radius |
| CN115958387A (en) * | 2022-11-28 | 2023-04-14 | 南京首勤特种材料有限公司 | Preparation method of stainless steel composite board, product and application thereof |
| CN115958387B (en) * | 2022-11-28 | 2023-11-07 | 南京首勤特种材料有限公司 | Preparation method of stainless steel composite board, product and application thereof |
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