CN111893264A - Production process of precision strip steel - Google Patents
Production process of precision strip steel Download PDFInfo
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- CN111893264A CN111893264A CN202010813004.7A CN202010813004A CN111893264A CN 111893264 A CN111893264 A CN 111893264A CN 202010813004 A CN202010813004 A CN 202010813004A CN 111893264 A CN111893264 A CN 111893264A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a production process of precision strip steel, belonging to the technical field of steel rolling, and the technical scheme is characterized in that raw materials are prepared, and a hot-rolled coil is selected as a raw material; pickling the hot-rolled coiled plate by using a continuous pickling line, and pickling by using 90-150g/L hydrochloric acid solution; uncoiling the hot rolled coil after acid washing, and sending the hot rolled coil to cold rolling equipment for rolling to obtain a rolled coil; sending the cold-rolled coil into an annealing furnace for spheroidizing annealing, flattening and straightening the annealed coil by using a flattening unit, and then shearing to obtain strip steel; the invention can reduce the phenomenon that impurities are retained on the surface of the steel plate in the processing process, simultaneously reduce the possibility of generating bubbles in the steel plate and improve the quality of the steel plate.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a production process of precision strip steel.
Background
The strip steel is a narrow and long steel plate produced by various steel rolling enterprises in order to meet the requirements of industrialized production of various types of metal or mechanical products by different industrial departments. At the end of the 20 th century, the world steel rolling technology has rapidly developed, and the steel rolling production has made great progress in the aspects of automation, high precision and continuity. Steel rolling production is an important production link and a main method for rolling steel ingots or steel billets into steel products. The strip steel product is widely applied to the industries of electronics, communication, computers, chemical engineering, household appliances, precision processing machinery, textile, printing, automobiles and the like.
The stainless steel strip generally adopts a steel coil subjected to conventional cold rolling and annealing as a raw material, and in the processing process of the strip steel, the strip steel is possibly not connected with a steel body due to defect characteristics, but is adhered to a plate surface to form a smooth pit after falling off, and the strip steel is poor in deoxidation in the production process, excessive gas is gathered in a plate blank due to improper argon blowing, bubbles in the plate are exposed or gathered to grow up, and the phenomenon of layering or poor welding in the subsequent processing and use process can be possibly caused.
Disclosure of Invention
The invention aims to provide a production process of precision strip steel, which can reduce the phenomenon that impurities are retained on the surface of a steel plate in the processing process, reduce the possibility of generating bubbles in the strip steel and improve the quality of the strip steel.
The technical purpose of the invention is realized by the following technical scheme:
a production process of precision strip steel comprises the following steps:
s1: preparing raw materials, and selecting a hot-rolled coil as a raw material;
s2: pickling the hot-rolled coiled plate by using a continuous pickling line, and pickling by using 90-150g/L hydrochloric acid solution;
s3: uncoiling the hot rolled coil after the pickling of S2, and sending the hot rolled coil to cold rolling equipment for rolling to obtain a rolled coil;
s4: sending the rolled coil subjected to the cold rolling of S3 into an annealing furnace for spheroidizing annealing, (1) heating the annealing furnace to 300 ℃ within 2-3h, and then, preserving the heat of the annealing furnace at 300 ℃ for 1-3 h; (2) heating the annealing furnace to 450 ℃ within 3-4h, and preserving heat for 2-3h after heating to 450 ℃; (3) heating the annealing furnace to 550 ℃ within 2.5-3.5h, and preserving heat for 2-3h after heating to 550 ℃; (4) heating the annealing furnace to 650 ℃ within 3-3.5h, and preserving heat for 1-2h after heating to 650 ℃; (5) heating the annealing furnace to 680 ℃ within 0.5-1h, and preserving heat for 10-12h after heating to 650 ℃; (6) firstly, setting an annealing furnace to cool to 600 ℃ within 1-2h, then cooling the temperature of the annealing furnace from 600 ℃ to 300 ℃ by adopting air cooling, then cooling the temperature of the annealing furnace to below 60 ℃ by adopting water cooling, and finally preparing an annealed coil;
s5: flattening and straightening the annealed coil by using a flattening unit, and then shearing to obtain strip steel;
s6: and (5) coating lubricating oil on two sides of the strip steel in the S5, and then packaging and warehousing.
Further, the temperature of the hydrochloric acid solution for acid washing is 60 to 80 ℃.
Further, the cold rolling in S3 is lubricated by an emulsion process, wherein the emulsion comprises 2-10% of mineral oil, an emulsifier and water.
Further, in S4, when the temperature is reduced to below 60 ℃, the annealing furnace is set to heat up to 300 ℃ within 3-5h, then the annealing furnace is kept at 300 ℃ for 2-3h, then the annealing furnace is set to heat up to 400 ℃ within 3-3.5h, the annealing furnace is kept at 400 ℃ for 1-2h, then the temperature of the annealing furnace is reduced to 300 ℃ with 280 plus materials by adopting air cooling, and then the temperature of the annealing furnace is reduced to below 60 ℃ by adopting water cooling and taken out.
Furthermore, the rolling speed of the leveling unit is 450-500 m/min.
Further, the technological process of the leveling unit in the S5 comprises the steps of feeding, uncoiling, S roller, leveling, S roller, straightening, S roller, coiling and uncoiling which are sequentially arranged.
In conclusion, the invention has the following beneficial effects:
1. the annealing furnace is used for annealing the rolled coil through the arrangement of the heating and cooling processes of the annealing furnace, and mainly has the functions of separating out solid-solution carbon in the rolled coil in a short time and growing up carbon element grains.
2. The emulsion process is adopted for lubrication during cold rolling, and the addition of the lubricant can reduce the friction coefficient, the friction resistance and the power consumption; the lubricant can reduce the friction coefficient, reduce the friction heat generated in the working process of equipment and play a role in cooling; meanwhile, the lubricant can prevent corrosion and protect the surface of the strip steel.
Drawings
FIG. 1 is a schematic diagram of a production process for embodying the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1:
a production process of precision strip steel comprises the following steps:
s1: preparing raw materials, and selecting a hot-rolled coil as a raw material;
s2: pickling the hot-rolled coiled plate by using a continuous pickling line, pickling by using 90g/L hydrochloric acid solution, and setting the temperature in a pickling tank to be 70 ℃;
s3: uncoiling the hot rolled coil after the pickling of S2, sending the hot rolled coil to a cold rolling device for rolling, and preparing a rolled coil, wherein the cold rolling is lubricated by adopting an emulsion process, and the emulsion comprises 2% of mineral oil, an emulsifier and water which are mixed and stirred to prepare the cold rolled coil;
s4: sending the rolled coil subjected to the cold rolling of S3 into an annealing furnace for spheroidizing annealing, (1) heating the annealing furnace to 300 ℃ within 3h, and then, preserving the heat of the annealing furnace at the temperature of 300 ℃ for 1 h; (2) heating the annealing furnace to 450 ℃ within 3h, and preserving heat for 2h after heating to 450 ℃; (3) heating the annealing furnace to 550 ℃ within 2.5h, and preserving heat for 2h after heating to 550 ℃; (4) heating the annealing furnace to 650 ℃ within 3h, and preserving heat for 1h after heating to 650 ℃; (5) heating the annealing furnace to 680 ℃ within 0.5h, and preserving heat for 10h after heating to 650 ℃; (6) firstly, setting an annealing furnace to cool to 600 ℃ within 1h, then cooling the temperature of the annealing furnace from 600 ℃ to 300 ℃ by adopting air cooling, and then cooling the temperature of the annealing furnace to below 60 ℃ by adopting water cooling; when the temperature is reduced to below 60 ℃, setting an annealing furnace to heat up to 300 ℃ within 3h, then, preserving the heat of the annealing furnace for 2h at the temperature of 300 ℃, then setting the annealing furnace to heat up to 400 ℃ within 3h, preserving the heat of the annealing furnace for 1h at the temperature of 400 ℃, then, reducing the temperature of the annealing furnace to 300 ℃ by adopting air cooling, then, reducing the temperature of the annealing furnace to below 60 ℃ by adopting water cooling, and taking out to prepare a coiled plate after annealing;
s5: leveling and straightening the annealed coil by using a leveling unit, wherein the process flow of the leveling unit comprises the steps of feeding, uncoiling, S roller, leveling, S roller, straightening, S roller, coiling and uncoiling which are sequentially arranged, the rolling speed of the leveling unit is 450m/min, the diameter of the roller is phi 335-phi 350mm, and then shearing is carried out to obtain the strip steel;
s6: and (5) coating lubricating oil on two sides of the strip steel in the S5, and then packaging and warehousing.
Example 2:
a production process of precision strip steel comprises the following steps:
s1: preparing raw materials, and selecting a hot-rolled coil as a raw material;
s2: pickling the hot-rolled coiled plate by using a continuous pickling line, pickling by using 100g/L hydrochloric acid solution, and setting the temperature in a pickling tank to be 70 ℃;
s3: uncoiling the hot rolled coil after the pickling of S2, sending the hot rolled coil to a cold rolling device for rolling, and preparing a rolled coil, wherein the cold rolling is lubricated by adopting an emulsion process, and the emulsion comprises 4% of mineral oil, an emulsifier and water which are mixed and stirred to prepare the cold rolled coil;
s4: sending the rolled coil subjected to the cold rolling of S3 into an annealing furnace for spheroidizing annealing, (1) heating the annealing furnace to 300 ℃ within 3h, and then, keeping the temperature of the annealing furnace at 300 ℃ for 2 h; (2) heating the annealing furnace to 450 ℃ within 4h, and preserving heat for 3h after heating to 450 ℃; (3) heating the annealing furnace to 550 ℃ within 3h, and preserving heat for 2.5h after heating to 550 ℃; (4) heating the annealing furnace to 650 ℃ within 3.5h, and preserving heat for 1.5h after heating to 650 ℃; (5) heating the annealing furnace to 680 ℃ within 1h, and keeping the temperature for 11h after heating to 650 ℃; (6) firstly, setting an annealing furnace to cool to 600 ℃ within 1h, then cooling the temperature of the annealing furnace from 600 ℃ to 300 ℃ by adopting air cooling, and then cooling the temperature of the annealing furnace to below 60 ℃ by adopting water cooling; when the temperature is reduced to below 60 ℃, setting an annealing furnace to heat up to 300 ℃ within 4h, then, preserving the heat of the annealing furnace for 3h at the temperature of 300 ℃, then setting the annealing furnace to heat up to 400 ℃ within 3.5h, preserving the heat of the annealing furnace for 1.5h at the temperature of 400 ℃, then, reducing the temperature of the annealing furnace to 300 ℃ by adopting air cooling, then, reducing the temperature of the annealing furnace to below 60 ℃ by adopting water cooling, and taking out to prepare an annealed coil;
s5: leveling and straightening the annealed coil by using a leveling unit, wherein the process flow of the leveling unit comprises the steps of feeding, uncoiling, S roller, leveling, S roller, straightening, S roller, coiling and uncoiling which are sequentially arranged, the rolling speed of the leveling unit is 450m/min, the diameter of the roller is phi 335-phi 350mm, and then shearing is carried out to obtain the strip steel;
s6: and (5) coating lubricating oil on two sides of the strip steel in the S5, and then packaging and warehousing.
Example 3:
s1: preparing raw materials, and selecting a hot-rolled coil as a raw material;
s2: pickling the hot-rolled coiled plate by using a continuous pickling line, pickling by using 100g/L hydrochloric acid solution, and setting the temperature in a pickling tank to be 70 ℃;
s3: uncoiling the hot rolled coil after the pickling of S2, sending the hot rolled coil to a cold rolling device for rolling, and preparing a rolled coil, wherein the cold rolling is lubricated by adopting an emulsion process, and the emulsion comprises 4% of mineral oil, an emulsifier and water which are mixed and stirred to prepare the cold rolled coil;
s4: sending the rolled coil subjected to the cold rolling of S3 into an annealing furnace for spheroidizing annealing, (1) heating the annealing furnace to 300 ℃ within 3h, and then, keeping the temperature of the annealing furnace at 300 ℃ for 2 h; (2) heating the annealing furnace to 450 ℃ within 4h, and preserving heat for 3h after heating to 450 ℃; (3) heating the annealing furnace to 550 ℃ within 3h, and preserving heat for 2.5h after heating to 550 ℃; (4) heating the annealing furnace to 650 ℃ within 3.5h, and preserving heat for 1.5h after heating to 650 ℃; (5) heating the annealing furnace to 680 ℃ within 1h, and keeping the temperature for 11h after heating to 650 ℃; (6) firstly, setting an annealing furnace to cool to 600 ℃ within 1h, then cooling the temperature of the annealing furnace from 600 ℃ to 300 ℃ by adopting air cooling, and then cooling the temperature of the annealing furnace to below 60 ℃ by adopting water cooling; preparing an annealed coil;
s5: leveling and straightening the annealed coil by using a leveling unit, wherein the process flow of the leveling unit comprises the steps of feeding, uncoiling, S roller, leveling, S roller, straightening, S roller, coiling and uncoiling which are sequentially arranged, the rolling speed of the leveling unit is 450m/min, the diameter of the roller is phi 335-phi 350mm, and then shearing is carried out to obtain the strip steel;
s6: and (5) coating lubricating oil on two sides of the strip steel in the S5, and then packaging and warehousing.
Example 1, example 2 and example 3 were used as test samples 1#, 2# and 3#, respectively, and then 3 test samples were cut into 5 × 1120 (thickness × width/mm × mm) pieces of strip steel by plasma cutting, and the magnitude of residual stress was measured at 6 positions from the edge to the center of the 3 test samples, respectively, with the test results shown in table 1.
Residual stress of test samples # 11, # 2 and # 3
As can be seen from the test results in Table 1, the residual stress in the 1# and 2# test samples after the second annealing is greatly reduced compared with the 3# test sample, so that the stress in the strip steel can be eliminated by the second annealing, and the surface of the 1# and 2# test samples is sufficiently pickled compared with the surface of the strip steel, so that the phenomenon of too large internal stress caused by non-uniform cold rolling temperature in the strip steel processing process can be reduced.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. The production process of the precision strip steel is characterized by comprising the following steps:
s1: preparing raw materials, and selecting a hot-rolled coil as a raw material;
s2: pickling the hot-rolled coiled plate by using a continuous pickling line, and pickling by using 90-150g/L hydrochloric acid solution;
s3: uncoiling the hot rolled coil after the pickling of S2, and sending the hot rolled coil to cold rolling equipment for rolling to obtain a rolled coil;
s4: sending the rolled coil subjected to the cold rolling of S3 into an annealing furnace for spheroidizing annealing, (1) heating the annealing furnace to 300 ℃ within 2-3h, and then, preserving the heat of the annealing furnace at 300 ℃ for 1-3 h; (2) heating the annealing furnace to 450 ℃ within 3-4h, and preserving heat for 2-3h after heating to 450 ℃; (3) heating the annealing furnace to 550 ℃ within 2.5-3.5h, and preserving heat for 2-3h after heating to 550 ℃; (4) heating the annealing furnace to 650 ℃ within 3-3.5h, and preserving heat for 1-2h after heating to 650 ℃; (5) heating the annealing furnace to 680 ℃ within 0.5-1h, and preserving heat for 10-12h after heating to 650 ℃; (6) firstly, setting an annealing furnace to cool to 600 ℃ within 1-2h, then cooling the temperature of the annealing furnace from 600 ℃ to 300 ℃ by adopting air cooling, then cooling the temperature of the annealing furnace to below 60 ℃ by adopting water cooling, and finally preparing an annealed coil;
s5: flattening and straightening the annealed coil by using a flattening unit, and then shearing to obtain strip steel;
s6: and (5) coating lubricating oil on two sides of the strip steel in the S5, and then packaging and warehousing.
2. The process for producing precision strip steel according to claim 1, characterized in that: the temperature of the hydrochloric acid solution for acid washing is 60-80 ℃.
3. The process for producing precision strip steel according to claim 1, characterized in that: and in the S3, the cold rolling is lubricated by adopting an emulsion process, wherein the emulsion comprises 2-10% of mineral oil, an emulsifier and water.
4. The process for producing precision strip steel according to claim 1, characterized in that: in S4, when the temperature is reduced to below 60 ℃, the annealing furnace is arranged to be heated to 300 ℃ within 3-5h, then the annealing furnace is insulated for 2-3h at the temperature of 300 ℃, then the annealing furnace is arranged to be heated to 400 ℃ within 3-3.5h, the annealing furnace is insulated for 1-2h at the temperature of 400 ℃, then air cooling is adopted to reduce the temperature of the annealing furnace to 280-300 ℃, and then water cooling is adopted to reduce the temperature of the annealing furnace to below 60 ℃ and then the annealing furnace is taken out.
5. The process for producing precision strip steel according to claim 1, characterized in that: the rolling speed of the leveling unit is 450-500 m/min.
6. The process for producing precision strip steel according to claim 1, characterized in that: the technological process of the leveling unit in the S5 comprises the steps of feeding, uncoiling, S roller, leveling, S roller, straightening, S roller, coiling and uncoiling which are sequentially arranged.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442698A (en) * | 2020-11-23 | 2021-03-05 | 浙江恒震特种材料股份有限公司 | Special steel strip production process |
| CN115386807A (en) * | 2022-09-19 | 2022-11-25 | 山西太钢不锈钢股份有限公司 | Ferrite stainless steel hot-rolled middle plate and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234171A (en) * | 2015-09-17 | 2016-01-13 | 武汉钢铁(集团)公司 | 4B cold-rolled precise steel strip and manufacturing method thereof |
| CN105369114A (en) * | 2015-12-03 | 2016-03-02 | 武汉钢铁(集团)公司 | Production method for thin pickling and annealing tool steel |
| CN106140812A (en) * | 2016-08-29 | 2016-11-23 | 湖北大帆金属制品有限公司 | A kind of method of working hot-rolled strip |
| CN109759444A (en) * | 2018-12-21 | 2019-05-17 | 浙江协和薄钢科技有限公司 | Cold-strip steel processing technology |
| CN110904319A (en) * | 2019-12-23 | 2020-03-24 | 新余钢铁股份有限公司 | Manufacturing process of high-carbon tool steel SK85 cold-rolled wide steel strip |
-
2020
- 2020-08-13 CN CN202010813004.7A patent/CN111893264A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234171A (en) * | 2015-09-17 | 2016-01-13 | 武汉钢铁(集团)公司 | 4B cold-rolled precise steel strip and manufacturing method thereof |
| CN105369114A (en) * | 2015-12-03 | 2016-03-02 | 武汉钢铁(集团)公司 | Production method for thin pickling and annealing tool steel |
| CN106140812A (en) * | 2016-08-29 | 2016-11-23 | 湖北大帆金属制品有限公司 | A kind of method of working hot-rolled strip |
| CN108193027A (en) * | 2016-08-29 | 2018-06-22 | 武汉佰起科技有限公司 | A kind of method of high efficiency working hot-rolled strip |
| CN109759444A (en) * | 2018-12-21 | 2019-05-17 | 浙江协和薄钢科技有限公司 | Cold-strip steel processing technology |
| CN110904319A (en) * | 2019-12-23 | 2020-03-24 | 新余钢铁股份有限公司 | Manufacturing process of high-carbon tool steel SK85 cold-rolled wide steel strip |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442698A (en) * | 2020-11-23 | 2021-03-05 | 浙江恒震特种材料股份有限公司 | Special steel strip production process |
| CN115386807A (en) * | 2022-09-19 | 2022-11-25 | 山西太钢不锈钢股份有限公司 | Ferrite stainless steel hot-rolled middle plate and preparation method thereof |
| CN115386807B (en) * | 2022-09-19 | 2023-12-22 | 山西太钢不锈钢股份有限公司 | Ferrite stainless steel hot-rolled middle plate and preparation method thereof |
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