CN114752734A - Hot rolling process method of X10CrAlSi18 heat-resistant stainless steel medium plate - Google Patents
Hot rolling process method of X10CrAlSi18 heat-resistant stainless steel medium plate Download PDFInfo
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- CN114752734A CN114752734A CN202210540441.5A CN202210540441A CN114752734A CN 114752734 A CN114752734 A CN 114752734A CN 202210540441 A CN202210540441 A CN 202210540441A CN 114752734 A CN114752734 A CN 114752734A
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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
- C21D8/0226—Hot rolling
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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
- C21D1/30—Stress-relieving
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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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention relates to a hot rolling process method of an X10CrAlSi18 heat-resistant stainless steel medium plate, belongs to the technical field of metal rolling, and solves the technical problems of coarse microstructure grains, low mechanical properties and poor surface quality of the X10CrAlSi18 heat-resistant stainless steel medium plate prepared by the prior art. The process route of the invention is as follows: the invention produces the heat-resistant Cr stainless medium plate with good mechanical property and excellent surface quality by controlling key process points of the processes of heating, rough rolling, finish rolling, heat treatment and the like and matching reasonable process parameters such as preheating zone furnace temperature, heating zone furnace temperature, rough rolling deformation, second-stage blank thickness, finish rolling initial rolling temperature, finish rolling final rolling reserved deformation and the like.
Description
Technical Field
The invention belongs to the technical field of metal rolling, and particularly relates to a hot rolling process method of an X10CrAlSi18 heat-resistant stainless steel medium plate.
Background
X10CrAlSi18 is one of the representative steel grades of ferrite heat-resisting stainless steel, is widely applied to industries such as power stations, boilers and the like, and has the characteristics of chemical components: the silicon element and the aluminum element are added on the basis of the chromium element, and a compact chromium, silicon and aluminum composite oxide film is formed on the surface of the material, so that the high temperature resistance and the oxidation resistance of the material are improved, and the maximum use temperature of the material can reach 800 ℃; meanwhile, the carbon content in the steel is controlled to be more than 0.07 percent, and the high-temperature strength of the material is ensured.
The traditional Cr stainless steel hot rolled plate production process route is as follows: and carrying out high-temperature continuous rolling on the uniformly heated Cr stainless blank in a rough rolling and finish rolling mode, carrying out heat treatment annealing and acid washing processes, and carrying out production and delivery after surface and size inspection.
The traditional Cr stainless hot rolled plate is continuously rolled at a high temperature, and the final rolling temperature of a finished product is high, so that the original grain structure in the steel plate before annealing is coarse, the grain structure in the steel plate after annealing is coarse, and the surface of the steel plate is subjected to thermal scratching to cause more and deep problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and solve the technical problems of coarse microstructure crystal grains, low mechanical property and poor surface quality of the X10CrAlSi18 heat-resistant stainless steel medium plate prepared by the prior art, and provides a hot rolling process method of the X10CrAlSi18 heat-resistant stainless steel medium plate.
The invention is realized by the following technical scheme:
the invention discloses a hot rolling process method of an X10CrAlSi18 heat-resistant stainless steel medium plate, which summarizes a hot rolling production process of the heat-resistant Cr stainless medium plate by improving blank temperature drop in a rough rolling process and carrying out process research on the thickness of blanks at two stages, the rolling temperature in a finish rolling link and the pass deformation rate of finish rolling finished products, and comprises the following steps:
blank smelting → blank continuous casting → blank grinding → blank heating → rough rolling → finish rolling control → annealing → performance inspection → surface and dimension inspection → packaging delivery; wherein:
(1) the temperature of a charging plate blank is not lower than 200 ℃ before the blank is heated, in order to avoid the situation that the blank is cracked before the blank is charged into the furnace or when the continuous casting blank runs in the heating furnace due to too fast temperature reduction of the continuous casting blank, after the polished continuous casting blank is fed into a factory, the charging and charging operation is quickly finished under the condition that the temperature of the charging plate blank is not lower than 200 ℃;
(2) feeding the continuous casting blank into a heating furnace for heating, wherein a preheating zone and a heating zone are sequentially arranged in the heating furnace according to the feeding direction of the blank, the furnace temperature of the preheating zone is 700-1050 ℃, and the furnace temperature of the heating zone is 1100-1200 ℃; the preheating zone can avoid cracking caused by thermal stress concentration caused by rapid heating after the continuous casting blank enters the furnace;
(3) And because the original end face of the continuous casting blank is a fine isometric crystal which is smaller than the grain structure of a hot cut section, the problem of stress cracking can be effectively resisted, and the problem of rolling edge cracking is weakened by adopting a widening longitudinal rolling mode in the rough rolling process. The rough rolling process adopts widening longitudinal rolling, and after 40-60% of deformation is finished, each pass of descaling, cooling and controlled rolling is adopted, and the thickness of a second-stage blank is controlled to be 30-55 mm according to the thickness of a finished product;
(4) and a finish rolling process: selecting corresponding initial rolling temperature according to the thickness of the finished product, wherein the reduction deformation rate of the final two finished product passes is 10-15%;
(5) and annealing the hot-rolled medium-thickness steel plate at the annealing temperature of 750-900 ℃, eliminating rolling stress and improving the problems of segregation and uneven distribution of the internal structure of the plate.
Compared with the prior art, the invention has the beneficial effects that:
the hot rolling process method of the X10CrAlSi18 heat-resistant stainless steel medium plate provided by the invention avoids the characteristic risk of easy cracking of steel, effectively controls edge cracking of a steel plate, optimizes the blank heating, low-temperature controlled rolling and heat treatment processes, achieves a yield of more than 83%, and has a production specification of 12mm in limit thickness and 20mm in maximum thickness, which are specified by the European standard, and stable quality.
Detailed Description
The present invention will be described in further detail with reference to examples.
A hot rolling process method of an X10CrAlSi18 heat-resistant stainless steel medium plate comprises the following steps: blank smelting → blank continuous casting → blank grinding → blank heating → rough rolling → finish rolling control → annealing → performance inspection → surface and dimension inspection → packaging delivery; wherein:
(1) the temperature of the plate blank charged into the furnace before the blank is heated is not lower than 200 ℃;
(2) feeding a continuous casting blank into a heating furnace for heating, wherein a preheating zone and a heating zone are sequentially arranged in the heating furnace according to the feeding direction of the blank, the furnace temperature of the preheating zone is 700-1050 ℃, and the furnace temperature of the heating zone is 1100-1200 ℃;
(3) the rough rolling process adopts widening longitudinal rolling, and after 40-60% of deformation is finished, each pass of descaling, cooling and controlled rolling is adopted, and the thickness of a second-stage blank is controlled to be 30-55 mm according to the thickness of a finished product;
(4) a finish rolling procedure: selecting corresponding initial rolling temperature according to the thickness of the finished product, wherein the reduction deformation rate of the final two finished product passes is 10-15%;
(5) annealing the hot-rolled medium-thickness steel plate at the annealing temperature of 750-900 ℃.
Three groups of examples are provided below, and specific process parameters and mechanical properties of the finished product are shown in the following table.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A hot rolling process method of an X10CrAlSi18 heat-resistant stainless steel medium plate is characterized by comprising the following steps: blank smelting → blank continuous casting → blank grinding → blank heating → rough rolling → finish rolling control → annealing → performance inspection → surface and dimension inspection → packaging delivery; wherein:
(1) the temperature of the plate blank charged into the furnace before the blank is heated is not lower than 200 ℃;
(2) feeding the continuous casting blank into a heating furnace for heating, wherein a preheating zone and a heating zone are sequentially arranged in the heating furnace according to the feeding direction of the blank, the furnace temperature of the preheating zone is 700-1050 ℃, and the furnace temperature of the heating zone is 1100-1200 ℃;
(3) the rough rolling process adopts widening longitudinal rolling, and after 40-60% of deformation is finished, descaling, cooling and controlled rolling are adopted in each pass, and the thickness of a second-stage blank is controlled to be 30-55 mm according to the thickness of a finished product;
(4) And a finish rolling process: selecting corresponding initial rolling temperature according to the thickness of the finished product, wherein the reduction deformation rate of the final two finished product passes is 10-15%;
(5) and annealing the hot-rolled medium-thickness steel plate at the annealing temperature of 750-900 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210540441.5A CN114752734B (en) | 2022-05-17 | 2022-05-17 | Hot rolling process method of X10CrAlSi18 heat-resistant stainless steel medium plate |
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|---|---|---|---|
| CN202210540441.5A CN114752734B (en) | 2022-05-17 | 2022-05-17 | Hot rolling process method of X10CrAlSi18 heat-resistant stainless steel medium plate |
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| CN114752734A true CN114752734A (en) | 2022-07-15 |
| CN114752734B CN114752734B (en) | 2023-08-22 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005325377A (en) * | 2004-05-12 | 2005-11-24 | Nippon Steel & Sumikin Stainless Steel Corp | Method for manufacturing heat resistant ferritic stainless steel sheet having excellent workability |
| CN101733274A (en) * | 2009-12-04 | 2010-06-16 | 东北大学 | Hot rolling method for improving combination property of medium/high chromium ferrite stainless steel |
| CN101947549A (en) * | 2010-09-10 | 2011-01-19 | 山东泰山钢铁集团有限公司 | Production technology for inhibiting nickel-saving austenitic stainless steel hot-rolled plate edge crack |
| CN103599926A (en) * | 2013-11-25 | 2014-02-26 | 山西太钢不锈钢股份有限公司 | Rolling method of high-alloy heat-resistant stainless steel coils |
| CN104593696A (en) * | 2015-01-21 | 2015-05-06 | 山西太钢不锈钢股份有限公司 | Heat-resistant steel sheet for power station boiler and manufacturing method thereof |
| CN107779579A (en) * | 2016-08-29 | 2018-03-09 | 王刚 | A kind of hot rolling for high chromium content ferrite stainless steel method |
| CN109642286A (en) * | 2016-10-17 | 2019-04-16 | 杰富意钢铁株式会社 | Ferrite-group stainless steel hot-roll annealing steel plate and its manufacturing method |
| CN113462967A (en) * | 2021-06-19 | 2021-10-01 | 山东盛阳金属科技股份有限公司 | 430 ferrite stainless steel and production process thereof |
-
2022
- 2022-05-17 CN CN202210540441.5A patent/CN114752734B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005325377A (en) * | 2004-05-12 | 2005-11-24 | Nippon Steel & Sumikin Stainless Steel Corp | Method for manufacturing heat resistant ferritic stainless steel sheet having excellent workability |
| CN101733274A (en) * | 2009-12-04 | 2010-06-16 | 东北大学 | Hot rolling method for improving combination property of medium/high chromium ferrite stainless steel |
| CN101947549A (en) * | 2010-09-10 | 2011-01-19 | 山东泰山钢铁集团有限公司 | Production technology for inhibiting nickel-saving austenitic stainless steel hot-rolled plate edge crack |
| CN103599926A (en) * | 2013-11-25 | 2014-02-26 | 山西太钢不锈钢股份有限公司 | Rolling method of high-alloy heat-resistant stainless steel coils |
| CN104593696A (en) * | 2015-01-21 | 2015-05-06 | 山西太钢不锈钢股份有限公司 | Heat-resistant steel sheet for power station boiler and manufacturing method thereof |
| CN107779579A (en) * | 2016-08-29 | 2018-03-09 | 王刚 | A kind of hot rolling for high chromium content ferrite stainless steel method |
| CN109642286A (en) * | 2016-10-17 | 2019-04-16 | 杰富意钢铁株式会社 | Ferrite-group stainless steel hot-roll annealing steel plate and its manufacturing method |
| CN113462967A (en) * | 2021-06-19 | 2021-10-01 | 山东盛阳金属科技股份有限公司 | 430 ferrite stainless steel and production process thereof |
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| CN114752734B (en) | 2023-08-22 |
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