CN111944973A - Preparation method of heterogeneous layered structure duplex stainless steel - Google Patents
Preparation method of heterogeneous layered structure duplex stainless steel Download PDFInfo
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- CN111944973A CN111944973A CN201910412901.4A CN201910412901A CN111944973A CN 111944973 A CN111944973 A CN 111944973A CN 201910412901 A CN201910412901 A CN 201910412901A CN 111944973 A CN111944973 A CN 111944973A
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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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- 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
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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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- 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
- C21D8/0273—Final recrystallisation annealing
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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Abstract
The invention discloses a preparation method of a heterogeneous layered structure duplex stainless steel. The method comprises the steps of firstly carrying out high-temperature homogenizing annealing treatment on hot-rolled duplex stainless steel to obtain initial duplex stainless steel, then carrying out deep cold rolling treatment on the initial duplex stainless steel to form a lamellar ultrafine-grained organization structure, effectively enhancing the strength of the initial duplex stainless steel, and finally carrying out incomplete recrystallization annealing treatment on the initial duplex stainless steel for 1-3 min at 950-1100 ℃ to prepare the duplex stainless steel with the heterogeneous layered structure, wherein the organization of the duplex stainless steel consists of a recrystallization organization in ferrite, an ultrafine-grained organization and a nanometer twin-grained organization in austenite. The duplex stainless steel with the structure can effectively maintain the strength of the superfine duplex stainless steel, and simultaneously can effectively enhance the tensile plasticity of the duplex stainless steel through back stress reinforcement in the stretching process. The heterogeneous layered structure duplex stainless steel effectively improves the ductility of the duplex stainless steel, almost keeps the strength close to that of rolled duplex stainless steel, effectively improves the strong plasticity matching performance of the duplex stainless steel, and is convenient for further industrial application.
Description
Technical Field
The invention relates to a preparation method of a heterogeneous layered structure duplex stainless steel, belonging to the field of material preparation.
Background
Compared with austenitic steel and ferritic steel, duplex stainless steel has better thermal conductivity, lower linear expansion coefficient, lower brittle transition temperature, excellent strength and corrosion resistance, and excellent weldability and oxidation resistance, so that duplex stainless steel is widely applied to wide fields of paper making industry, petrochemical industry, light industry, food industry, marine operation, energy and environmental protection industry and the like. With the development of science and technology, various fields of industry have further requirements on the comprehensive mechanical properties of the duplex stainless steel. Generally, the strength of the hot rolled duplex stainless steel is lower than that of the cold deformed duplex stainless steel, and the industrial field with higher strength requirement is difficult to meet. Therefore, the fact that the tensile plasticity of the duplex stainless steel can be effectively increased while the strength of the duplex stainless steel is improved becomes a key for further wide application of the duplex stainless steel.
The severe plastic deformation can effectively refine crystal grains so as to achieve the effect of improving the strength, and the commonly used severe plastic deformation process comprises high-pressure torsion, equal-channel radial-angular extrusion, cumulative lap rolling and the like. These methods, while greatly improving the strength of duplex stainless steel, are accompanied by a reduction in ductility and work hardening rate. Therefore, further improving the strong plastic matching of duplex stainless steel is a problem to be solved for practical industry and application.
In recent years, a great deal of research shows that the heterogeneity of the structure of the metal material can effectively improve the comprehensive mechanical properties of the material. The main reason that the gradient structure, the bimodal structure, the harmonic structure and the heterogeneous layered structure can improve the strong plastic matching performance of the material is that a strain gradient and a soft-hard interface are introduced into the material, the yield strength of the material is improved by refined grains and back stress in the deformation process, and meanwhile, the tensile plasticity of the material is enhanced by a large number of geometrical essential dislocations propagated at the soft-hard interface.
A literature search of the prior art has revealed that Xie L et al, Materials Science and Engineering: a "(Material science and engineering A,2018,738:190-, however, the strength of the duplex stainless steel treated by the method is obviously reduced relative to the strength of the duplex stainless steel in a rolling state (cold deformation state), and the method cannot meet the industrial application field with higher strength requirement, the aim of effectively maintaining the strength of the duplex stainless steel while improving the ductility is still a problem which is difficult to solve in the scientific community.
Disclosure of Invention
The invention aims at the contradiction that the hot-rolled dual-phase stainless steel has low strength and the ultra-fine grain/nano crystalline dual-phase stainless steel has extremely low plasticity, and provides a preparation method of the dual-phase stainless steel with the heterogeneous laminated structure.
The invention is realized by the following technical scheme, a preparation method of the duplex stainless steel with the heterogeneous layered structure, the used duplex stainless steel is industrial 2507 duplex stainless steel, and the method comprises the following steps:
the first step is as follows: and (5) carrying out initial homogenizing annealing treatment. Annealing the duplex stainless steel plate for 2-4 hours at 1100-1200 ℃, and cooling with water to obtain initial duplex stainless steel with large grain characteristics;
the second step is that: and (5) rolling treatment with high deformation. Carrying out multi-pass rolling deformation treatment on the initial state duplex stainless steel until the reduction is 60-80% to obtain the high-strength superfine layered structure duplex stainless steel, namely the rolling state duplex stainless steel;
the third step: and (5) high-temperature short-time annealing treatment. And (3) carrying out short-time annealing treatment for 1-3 min on the rolled duplex stainless steel at 900-1100 ℃, and carrying out air cooling to obtain the heterostructure duplex stainless steel with excellent strong plasticity matching.
Furthermore, in the first step and the third step, the annealing treatment is that the annealing furnace is heated to a specified temperature and then the material is put into the annealing furnace.
Compared with the prior art, the invention has the following technical effects:
(1) the invention adopts rolling and annealing process which is mature and used in industry, and the rolling and annealing process is carried out by multiple passes, high deformation rolling and short-time annealing treatment; on one hand, on the premise of ensuring that the material does not lose efficacy, necessary conditions can be provided for recrystallization of the material through high-deformation rolling treatment, on the other hand, heterogeneous layered structure duplex stainless steel can be successfully prepared by utilizing short-time annealing treatment and the difference of duplex recrystallization nucleation, and the tensile plasticity of the heterogeneous layered structure duplex stainless steel is enhanced through a back stress strengthening mechanism in the stretching process, and the strength of the heterogeneous layered structure duplex stainless steel is almost kept unchanged;
(2) the invention has simple production and processing technology, and can obtain the heterogeneous layered structure duplex stainless steel by adopting initial homogenizing annealing treatment, subsequent rolling and short-time annealing treatment;
(3) the preparation process is clear and accurate, the reliability is high, the efficiency is high, and the material components can be selected widely;
(4) the equipment related to the process has a simple structure, is easy to control the process and regulate and control parameters, and has low technical requirements on workers.
Drawings
FIG. 1 is a schematic view of an exemplary process flow.
FIG. 2 is a diagram showing an initial phase of a duplex stainless steel alloy.
FIG. 3 is a metallographic picture of rolled 70% duplex stainless steel.
FIG. 4 is TEM bright field image of a heterostructure duplex stainless steel formed after annealing of rolled 70% duplex stainless steel at 1000 ℃ for 2 min.
FIG. 5 is a graph of mechanical properties of duplex stainless steel under different annealing parameters.
FIG. 6 is a test chart of the cyclic loading and unloading (back stress) of the duplex stainless steel with a heterostructure formed after annealing of rolled 70% duplex stainless steel at 1000 ℃ for 2 min.
Fig. 7 is a graph of the back stress magnitude test results of the above-mentioned heterostructure duplex stainless steel during the stretching process.
Wherein γ represents austenite, α represents ferrite, 1 is an annealing furnace, 2 is a duplex stainless steel sheet, and 3 is a small roll.
To specifically illustrate the embodiment of the present invention, a duplex stainless steel of Fe-25Cr-7Ni-3Mo-0.3N (2507) is taken as an example of the material. The implementation steps design three programs: homogenizing annealing treatment, high-deformation rolling treatment and high-temperature short-time annealing treatment of the initial duplex stainless steel.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and the detailed operation procedures of the embodiments are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
First, the present embodiment adopts the following apparatus: hot rolling and cold rolling multipurpose mill with 400 mm diameter and 350mm diameter and pipe annealing furnace. The specific operation of this example to prepare a heterogeneous layered structure duplex stainless steel is as follows:
the method comprises the following steps: and (5) carrying out initial homogenizing annealing treatment. Cutting a rectangular sample of 100mm multiplied by 50mm multiplied by 10mm on a duplex stainless steel plate, polishing the surface of the sample by using abrasive paper with the granularity of 600# to 1500# until the sample is completely flat, heating an annealing furnace to 1100 ℃, then placing the duplex stainless steel in a high-temperature annealing furnace at 1100 ℃, preserving heat for 2 hours, and finally cooling the duplex stainless steel to room temperature in a water cooling mode.
Step two: and (5) rolling treatment with high deformation. The duplex stainless steel after high-temperature long-time annealing is rolled synchronously at room temperature (cold rolling) by a small double roller with the roller diameter of 120mm and the roller width of 250mm, the upper and lower pressing rollers are 40Hz, the rolling amount is 0.2mm each time, the final rolling amount in the experiment is 70%, and the thickness of the final duplex stainless steel plate is 3 mm.
Step three: and (5) high-temperature short-time annealing treatment. And (2) carrying out heat preservation for 2min at 900 ℃ on the duplex stainless steel with the rolling reduction of 70%, specifically, heating the annealing furnace to 900 ℃, then directly putting the duplex stainless steel with the rolling reduction of 70% into a high-temperature annealing furnace for annealing treatment, taking out after 2min, and cooling to room temperature in an air cooling mode to obtain the duplex stainless steel with the heterogeneous layered structure. The yield strength of the heterogeneous layered structure duplex stainless steel is up to 1240MPa, the tensile strength is up to 1385MPa, the uniform elongation is 1.4 percent, and the fracture elongation is 8.6 percent. Compared with the rolled duplex stainless steel, the 2507 duplex stainless steel treated by the method disclosed by the invention has the advantages that the strength of the duplex stainless steel is improved, the plasticity and ductility of the duplex stainless steel are effectively improved, the good strength-plasticity matching is realized, the back stress strengthening plays a role in strengthening the strong plasticity of the material, and the industrial application can be greatly promoted.
Example 2
First, the present embodiment adopts the following apparatus: hot rolling and cold rolling multipurpose mill with 400 mm diameter and 350mm diameter and pipe annealing furnace. The specific operation of this example to prepare a heterogeneous layered structure duplex stainless steel is as follows:
the method comprises the following steps: and (5) carrying out initial homogenizing annealing treatment. Cutting a rectangular sample of 100mm multiplied by 50mm multiplied by 10mm on a duplex stainless steel plate, polishing the surface of the sample by using abrasive paper with the granularity of 600# to 1500# until the sample is completely flat, heating an annealing furnace to 1100 ℃, then placing the duplex stainless steel in a high-temperature annealing furnace at 1100 ℃, preserving heat for 2 hours, and finally cooling the duplex stainless steel to room temperature in a water cooling mode.
Step two: and (5) rolling treatment with high deformation. The duplex stainless steel after high-temperature long-time annealing is rolled synchronously at room temperature (cold rolling) by a small double roller with the roller diameter of 120mm and the roller width of 250mm, the upper and lower pressing rollers are 40Hz, the rolling amount is 0.2mm each time, the final rolling amount in the experiment is 70%, and the thickness of the final duplex stainless steel plate is 3 mm.
Step three: and (5) high-temperature short-time annealing treatment. And (2) performing heat preservation at 950 ℃ for 2min annealing treatment on the duplex stainless steel with the rolling reduction of 70%, specifically, heating the annealing furnace to 950 ℃, then directly putting the duplex stainless steel with the rolling reduction of 70% into a high-temperature annealing furnace for annealing treatment, taking out after 2min, and cooling to room temperature in an air cooling mode to obtain the duplex stainless steel with the heterogeneous layered structure. The yield strength of the heterogeneous layered structure duplex stainless steel is up to 1150MPa, the tensile strength is up to 1245MPa, the uniform elongation is 4.2%, and the fracture elongation is 11.5%. Compared with the rolled duplex stainless steel, the 2507 duplex stainless steel treated by the method disclosed by the invention has the advantages that the plasticity and ductility of the duplex stainless steel are effectively improved while the strength of the duplex stainless steel is basically kept, the good strength-plasticity matching is realized, and the industrial application can be greatly promoted.
Example 3
First, the present embodiment adopts the following apparatus: hot rolling and cold rolling multipurpose mill with 400 mm diameter and 350mm diameter and pipe annealing furnace. The specific operation of this example to prepare a heterogeneous layered structure duplex stainless steel is as follows:
the method comprises the following steps: and (5) carrying out initial homogenizing annealing treatment. Cutting a rectangular sample of 100mm multiplied by 50mm multiplied by 10mm on a duplex stainless steel plate, polishing the surface of the sample by using abrasive paper with the granularity of 600# to 1500# until the sample is completely flat, heating an annealing furnace to 1100 ℃, then placing the duplex stainless steel in a high-temperature annealing furnace at 1100 ℃, preserving heat for 2 hours, and finally cooling the duplex stainless steel to room temperature in a water cooling mode.
Step two: and (5) rolling treatment with high deformation. The duplex stainless steel after high-temperature long-time annealing is rolled synchronously at room temperature (cold rolling) by a small double roller with the roller diameter of 120mm and the roller width of 250mm, the upper and lower pressing rollers are 40Hz, the rolling amount is 0.2mm each time, the final rolling amount in the experiment is 70%, and the thickness of the final duplex stainless steel plate is 3 mm.
Step three: and (5) high-temperature short-time annealing treatment. And (2) carrying out heat preservation for 2min at 1000 ℃ on the duplex stainless steel with the rolling reduction of 70%, specifically, heating the annealing furnace to 1000 ℃, then directly putting the duplex stainless steel with the rolling reduction of 70% into a high-temperature annealing furnace for annealing treatment, taking out after 2min, and cooling to room temperature in an air cooling mode to obtain the duplex stainless steel with the heterogeneous layered structure. The yield strength of the heterogeneous layered structure duplex stainless steel is up to 1150MPa, the tensile strength is up to 1245MPa, the uniform elongation is 5.2%, and the fracture elongation is 12.5%. The metallographic phase diagrams of the initial duplex stainless steel after the homogenization annealing and before and after the cold rolling are shown in fig. 2 and 3, the microscopic TEM bright field image of the heterogeneous layered structure duplex stainless steel is shown in fig. 4, the engineering stress-engineering strain curve of the rolled and heterogeneous layered structure duplex stainless steel is shown in fig. 5, and the back stress strengthening (cyclic loading and unloading test result) is shown in fig. 6. Compared with the rolled duplex stainless steel, the 2507 duplex stainless steel treated by the method disclosed by the invention has the advantages that the plasticity and ductility of the duplex stainless steel are effectively improved while the strength of the duplex stainless steel is basically kept, the good strength-plasticity matching is realized, and the industrial application can be greatly promoted.
In order to further embody the structural and mechanical properties of the heterogeneous layered structure duplex stainless steel, comparative examples are given below for comparison.
Example 4
First, the present embodiment adopts the following apparatus: hot rolling and cold rolling multipurpose mill with 400 mm diameter and 350mm diameter and pipe annealing furnace. The specific operation of this example to prepare a heterogeneous layered structure duplex stainless steel is as follows:
the method comprises the following steps: and (5) carrying out initial homogenizing annealing treatment. Cutting a rectangular sample of 100mm multiplied by 50mm multiplied by 10mm on a duplex stainless steel plate, polishing the surface of the sample by using abrasive paper with the granularity of 600# to 1500# until the sample is completely flat, heating an annealing furnace to 1100 ℃, then placing the duplex stainless steel in a high-temperature annealing furnace at 1100 ℃, preserving heat for 2 hours, and finally cooling the duplex stainless steel to room temperature in a water cooling mode.
Step two: and (5) rolling treatment with high deformation. The duplex stainless steel after high-temperature long-time annealing is rolled synchronously at room temperature (cold rolling) by a small double roller with the roller diameter of 120mm and the roller width of 250mm, the upper and lower pressing rollers are 40Hz, the rolling amount is 0.2mm each time, the final rolling amount in the experiment is 70%, and the thickness of the final duplex stainless steel plate is 3 mm.
Step three: and (5) high-temperature short-time annealing treatment. And (2) performing 900 ℃ heat preservation 30S annealing treatment on the duplex stainless steel with the rolling reduction of 70%, specifically, heating the annealing furnace to 900 ℃, then directly putting the duplex stainless steel with the rolling reduction of 70% into a high-temperature annealing furnace for annealing treatment, taking out the duplex stainless steel after 30S, and cooling the duplex stainless steel to room temperature in an air cooling mode to obtain the duplex stainless steel with the heterogeneous layered structure. The yield strength of the heterogeneous layered structure duplex stainless steel is up to 1120MPa, the tensile strength is up to 1260MPa, the uniform elongation is only 1.0%, and the breaking elongation is only 10.1%. It can be seen that the structure of the annealed duplex stainless steel is only in a recovered state in a shorter time, and the mechanical properties thereof are not substantially changed significantly compared to those of the rolled duplex stainless steel, which does not facilitate industrial application.
Claims (9)
1. A preparation method of the heterogeneous layered structure duplex stainless steel is characterized by comprising the following steps:
step 1: annealing the duplex stainless steel plate for 2-4 hours at 1100-1200 ℃ by initial homogenizing annealing treatment, and water-cooling to obtain initial duplex stainless steel with large grain characteristics;
step 2: high-deformation rolling, namely performing multi-pass rolling deformation treatment on the initial state duplex stainless steel until the reduction is 60-80% to obtain high-strength superfine laminated structure duplex stainless steel, namely the rolled state duplex stainless steel;
and step 3: and (3) high-temperature short-time annealing treatment, namely performing short-time annealing treatment for 1-3 min on the rolled duplex stainless steel at 900-1100 ℃, and performing air cooling to obtain the heterostructure duplex stainless steel with excellent strong plasticity matching.
2. A method of manufacturing a heterolamellar duplex stainless steel according to claim 1, characterized in that the material is industrial 2507 duplex stainless steel.
3. A method for preparing a duplex stainless steel with a heterogeneous layered structure according to claim 1, wherein in the first step, the homogenizing annealing is performed by heating the annealing furnace to 1100 ℃ to 1200 ℃ and then annealing the duplex stainless steel in the annealing furnace.
4. A method of manufacturing a hetero-layered structure duplex stainless steel according to claim 1, wherein in the first step, the cooling manner of the homogenization annealing is water cooling.
5. The method of preparing a heterolamellar duplex stainless steel according to claim 1, wherein in step two the reduction per pass is 2% up to 60-80%.
6. A method for preparing a hetero-lamellar structure duplex stainless steel according to claim 1, characterized in that the rolling mode in step two is room temperature simultaneous rolling, i.e. cold rolling.
7. A method for preparing a duplex stainless steel with a heterogeneous laminated structure according to claim 1, wherein the high-temperature short-time annealing in the third step comprises heating the annealing furnace to 900-1100 ℃, and then placing the duplex stainless steel in the annealing furnace for annealing.
8. A method for preparing a heterolamellar duplex stainless steel according to claim 1, characterized in that the cooling mode of the high temperature short time annealing in step three is air cooling.
9. A preparation method of a heterogeneous layered structure duplex stainless steel is characterized by comprising the following steps:
the heterogeneous layered structure duplex stainless steel is prepared by utilizing homogenization annealing treatment, high-deformation rolling treatment and high-temperature short-time annealing treatment, and comprises three procedures: the method comprises the following steps of initial homogenizing annealing treatment, high-deformation rolling treatment and high-temperature short-time annealing treatment, and specifically comprises the following steps:
the method comprises the following steps: carrying out initial homogenizing annealing treatment, cutting a rectangular sample of 100mm multiplied by 50mm multiplied by 10mm on a Fe-25Cr-7Ni-3Mo-0.3N duplex stainless steel plate, polishing the surface of the rectangular sample by using abrasive paper with the granularity of 600-1500 #, heating an annealing furnace to 1100 ℃, then placing the duplex stainless steel in a high-temperature annealing furnace at 1100 ℃, preserving heat for 2 hours, and finally cooling to room temperature in a water cooling mode;
step two: high-deformation rolling treatment, namely performing room-temperature synchronous cold rolling on the Fe-25Cr-7Ni-3Mo-0.3N duplex stainless steel subjected to high-temperature long-time annealing by a small double roller with the roller diameter of 120mm and the roller width of 250mm, wherein the upper and lower pressing rollers are 40Hz, the rolling reduction is 0.2mm each time, the final rolling reduction is 70%, and the thickness of the final duplex stainless steel plate is 3 mm;
step three: and (2) high-temperature short-time annealing treatment, namely performing heat preservation at 1000 ℃ for 2min on the Fe-25Cr-7Ni-3Mo-0.3N duplex stainless steel with the rolling reduction of 70%, specifically, heating the annealing furnace to 1000 ℃, directly putting the duplex stainless steel with the rolling reduction of 70% into a high-temperature annealing furnace for annealing treatment, taking out after 2min, and cooling to room temperature in an air cooling mode to obtain the duplex stainless steel with the heterogeneous layered structure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899444A (en) * | 2021-01-20 | 2021-06-04 | 东北大学 | Heat treatment process of high-strength high-toughness ferrite-austenite duplex stainless steel |
| CN115011772A (en) * | 2022-04-18 | 2022-09-06 | 钢铁研究总院有限公司 | Method for refining ferrite grain size in duplex stainless steel and duplex stainless steel |
| CN115612814A (en) * | 2022-10-11 | 2023-01-17 | 中山大学 | Method for preparing gradient structure biphase stainless steel based on thermal coupling recrystallization |
| CN116516121A (en) * | 2023-05-16 | 2023-08-01 | 广东海洋大学 | 321 austenitic stainless steel belt with lamellar crystal grain size isomerism and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003147489A (en) * | 2001-11-08 | 2003-05-21 | Nippon Steel Corp | Duplex stainless steel sheet and manufacturing method |
| KR20030049334A (en) * | 2001-12-14 | 2003-06-25 | 주식회사 포스코 | A method of continuous annealing for cold-rolled 22Cr duplex stainless steel |
| CN101903554A (en) * | 2008-02-05 | 2010-12-01 | 新日铁住金不锈钢株式会社 | Ferrite-austenite stainless steel sheet excellent in ridging resistance and workability and process for manufacturing the same |
| CN105200341A (en) * | 2015-09-23 | 2015-12-30 | 宝钢不锈钢有限公司 | Economical duplex stainless steel with tensile strength larger than 1000 MPa and manufacturing method thereof |
| CN105331899A (en) * | 2015-09-24 | 2016-02-17 | 宝钢不锈钢有限公司 | Ferritic stainless steel with good crease resistance and manufacturing method of ferritic stainless steel |
| CN105543714A (en) * | 2015-12-25 | 2016-05-04 | 东北大学 | Duplex stainless steel thin strip and near-net shaping preparation method thereof |
| CN105886956A (en) * | 2016-07-01 | 2016-08-24 | 东北大学 | Economical duplex stainless steel sheet and preparation method thereof |
| CN109355485A (en) * | 2018-11-19 | 2019-02-19 | 重庆大学 | A kind of preparation method of High-strength high-plasticity ferrite austenite dual phase steel |
| CN109694997A (en) * | 2019-02-25 | 2019-04-30 | 上海大学 | Change the heat treatment process for promoting Fe-Mn-Al-C Mechanical Properties of Dual Phase Steels using γ → α ppolymorphism |
-
2019
- 2019-05-17 CN CN201910412901.4A patent/CN111944973A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003147489A (en) * | 2001-11-08 | 2003-05-21 | Nippon Steel Corp | Duplex stainless steel sheet and manufacturing method |
| KR20030049334A (en) * | 2001-12-14 | 2003-06-25 | 주식회사 포스코 | A method of continuous annealing for cold-rolled 22Cr duplex stainless steel |
| CN101903554A (en) * | 2008-02-05 | 2010-12-01 | 新日铁住金不锈钢株式会社 | Ferrite-austenite stainless steel sheet excellent in ridging resistance and workability and process for manufacturing the same |
| CN105200341A (en) * | 2015-09-23 | 2015-12-30 | 宝钢不锈钢有限公司 | Economical duplex stainless steel with tensile strength larger than 1000 MPa and manufacturing method thereof |
| CN105331899A (en) * | 2015-09-24 | 2016-02-17 | 宝钢不锈钢有限公司 | Ferritic stainless steel with good crease resistance and manufacturing method of ferritic stainless steel |
| CN105543714A (en) * | 2015-12-25 | 2016-05-04 | 东北大学 | Duplex stainless steel thin strip and near-net shaping preparation method thereof |
| CN105886956A (en) * | 2016-07-01 | 2016-08-24 | 东北大学 | Economical duplex stainless steel sheet and preparation method thereof |
| CN109355485A (en) * | 2018-11-19 | 2019-02-19 | 重庆大学 | A kind of preparation method of High-strength high-plasticity ferrite austenite dual phase steel |
| CN109694997A (en) * | 2019-02-25 | 2019-04-30 | 上海大学 | Change the heat treatment process for promoting Fe-Mn-Al-C Mechanical Properties of Dual Phase Steels using γ → α ppolymorphism |
Non-Patent Citations (1)
| Title |
|---|
| LIN XIE等: "Managing both strength and ductility in duplex stainless steel with heterogeneous lamella structure", 《MATERIALS SCIENCE&ENGINEERING A》 * |
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| CN112899444A (en) * | 2021-01-20 | 2021-06-04 | 东北大学 | Heat treatment process of high-strength high-toughness ferrite-austenite duplex stainless steel |
| CN112899444B (en) * | 2021-01-20 | 2022-03-25 | 东北大学 | Heat treatment process of high-strength high-toughness ferrite-austenite duplex stainless steel |
| CN115011772A (en) * | 2022-04-18 | 2022-09-06 | 钢铁研究总院有限公司 | Method for refining ferrite grain size in duplex stainless steel and duplex stainless steel |
| CN115011772B (en) * | 2022-04-18 | 2024-01-02 | 钢铁研究总院有限公司 | Method for refining ferrite grain size in duplex stainless steel and duplex stainless steel |
| CN115612814A (en) * | 2022-10-11 | 2023-01-17 | 中山大学 | Method for preparing gradient structure biphase stainless steel based on thermal coupling recrystallization |
| CN116516121A (en) * | 2023-05-16 | 2023-08-01 | 广东海洋大学 | 321 austenitic stainless steel belt with lamellar crystal grain size isomerism and preparation method thereof |
| CN116516121B (en) * | 2023-05-16 | 2023-12-01 | 广东海洋大学 | 321 austenitic stainless steel belt with lamellar crystal grain size isomerism and preparation method thereof |
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