CN114752734B - 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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- CN114752734B CN114752734B CN202210540441.5A CN202210540441A CN114752734B CN 114752734 B CN114752734 B CN 114752734B CN 202210540441 A CN202210540441 A CN 202210540441A CN 114752734 B CN114752734 B CN 114752734B
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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
-
- 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
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 property 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 discloses a heat-resistant Cr stainless medium plate with good mechanical properties and excellent surface quality, which is produced by controlling key process points of procedures such as heating, rough rolling, finish rolling, heat treatment and the like, matching reasonable process parameters such as furnace temperature in a preheating zone, furnace temperature in a heating zone, rough rolling deformation, two-stage billet thickness, finish rolling start rolling temperature, finish 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 types of ferrite heat-resistant stainless steel, and is widely applied to the industries of power stations, boilers and the like, and the chemical components of the steel are characterized in that: silicon element and aluminum element are added on the basis of chromium element, and a compact composite oxide film of chromium, silicon and aluminum 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 highest use temperature can reach 800 ℃; and meanwhile, the carbon content in the steel is controlled to be more than 0.07%, so that the high-temperature strength of the material is ensured.
The traditional production process route of the Cr stainless steel hot rolled plate is as follows: and (3) carrying out high-temperature continuous rolling on the uniformly heated Cr stainless blank in a rough rolling and finish rolling mode, and carrying out heat treatment annealing and pickling processes, and carrying out surface and size inspection to produce delivery.
The traditional Cr stainless hot rolled plate is rolled continuously at a high temperature, and the original grain structure in the steel plate before annealing is coarse due to the fact that the final rolling temperature of a finished product is high, so that the grain structure in the steel plate after annealing also shows a coarse phenomenon, and the surface hot scratch of the steel plate also shows a more and deeper problem.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, solve the technical problems of coarse microstructure grains, low mechanical property and poor surface quality of the X10CrAlSi18 heat-resistant stainless steel medium plate prepared by the prior art, and provide 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 relates to a hot rolling process method of an X10CrAlSi18 heat-resistant stainless steel medium plate, which improves the temperature drop of a blank in a rough rolling process, and carries out process study on the thickness of the blank in two stages, the rolling temperature in a finish rolling link and the pass deformation rate of a finish rolling finished product, thereby summarizing the hot rolling production process of the heat-resistant Cr stainless steel medium plate, and comprises the following steps:
blank smelting, blank continuous casting, blank grinding, blank heating, rough rolling, finish rolling control rolling, annealing treatment, performance inspection, surface and size inspection and packaging delivery; wherein:
(1) The temperature of the charging plate blank before the blank is heated is not lower than 200 ℃, so as to avoid cracking of the blank before the charging of the blank or during the running in a heating furnace due to the excessively fast cooling of the continuous casting blank, and the charging operations are rapidly organized under the condition of ensuring that the temperature of the charging plate blank is not lower than 200 ℃ after the polished continuous casting blank arrives at a factory;
(2) Heating the continuous casting blank in a heating furnace, 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 heat stress concentration caused by rapid heating after the continuous casting blank is fed into the furnace;
(3) In view of the fact that the original end face of the continuous casting blank is fine equiaxed crystal, the grain structure of the continuous casting blank is finer than that of a fire cut face, the problem of stress cracking can be effectively resisted, and the problem of rolling edge cracking is reduced by adopting a widening longitudinal rolling mode in a rough rolling process. The rough rolling procedure adopts stretching longitudinal rolling, and after finishing 40-60% deformation, each pass of descaling, cooling and rolling control is adopted, and the thickness of the two-stage billet is controlled to be 30-55 mm according to the thickness of the finished product;
(4) Finish rolling: 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 750-900 ℃, eliminating rolling stress and improving the problem of internal tissue segregation and uneven distribution of the plate.
Compared with the prior art, the invention has the beneficial effects that:
according to the hot rolling process method for the X10CrAlSi18 heat-resistant stainless steel medium plate, provided by the invention, the risk of easy cracking of steel types is avoided, the edge cracking of the steel plate is effectively controlled, the blank heating, low-temperature controlled rolling and heat treatment process optimization are performed, the yield is more than 83%, the produced specification reaches the limit thickness of 12mm specified by European standard, the maximum thickness reaches 20mm, and the quality is stable.
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 rolling, annealing treatment, performance inspection, surface and size inspection and packaging delivery; wherein:
(1) The temperature of the charging plate blank before heating the blank is not lower than 200 ℃;
(2) The continuous casting blank is sent into a heating furnace for heating, 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 procedure adopts stretching longitudinal rolling, and after finishing 40-60% deformation, each pass of descaling, cooling and rolling control is adopted, and the thickness of the two-stage billet is controlled to be 30-55 mm according to the thickness of the finished product;
(4) Finish rolling: 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 (3) annealing the hot-rolled medium-thickness steel plate, wherein the annealing temperature is 750-900 ℃.
Three examples are provided below, with specific process parameters and final mechanical properties as shown in the following table.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in 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 of: blank smelting, blank continuous casting, blank grinding, blank heating, rough rolling, finish rolling control rolling, annealing treatment, performance inspection, surface and size inspection and packaging delivery; wherein:
(1) The temperature of the charging plate blank before heating the blank is not lower than 200 ℃;
(2) Heating the continuous casting blank in a heating furnace, 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 procedure adopts stretching longitudinal rolling, and after finishing 40-60% deformation, each pass of descaling, cooling and rolling control is adopted, and the thickness of the two-stage billet is controlled to be 30-55 mm according to the thickness of the finished product;
(4) Finish rolling: 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 750-900 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 CN114752734A (en) | 2022-07-15 |
| CN114752734B true 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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| CN114752734A (en) | 2022-07-15 |
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