CN103757555A - Economical double-phase stainless steel with excellent sheet breakage elongation - Google Patents
Economical double-phase stainless steel with excellent sheet breakage elongation Download PDFInfo
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- CN103757555A CN103757555A CN201410000434.1A CN201410000434A CN103757555A CN 103757555 A CN103757555 A CN 103757555A CN 201410000434 A CN201410000434 A CN 201410000434A CN 103757555 A CN103757555 A CN 103757555A
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Abstract
The invention relates to high-quality economical double-phase stainless steel with excellent sheet breakage elongation, which belongs to the technical field of steel alloy materials. The high-quality economical double-phase stainless steel with excellent sheet breakage elongation is characterized by comprising the following components in percentage by mass: less than or equal to 0.06% of C, less than or equal to 1.5% of Mn, less than or equal to 0.01% of S, less than or equal to 1.0% of Si, less than or equal to 0.015% of P, 19.0-22.0% of Cr, 1.0-2.0% of Mo, 0.4-1.4% of W, 3.0-5.0% of Ni, 0.15-0.25% of N, 0.001-0.01% of B, 0.005-0.20% of rare earth Ce or Y, and the balance of Fe. The components are comprehensively matched and molten by using a conventional ordinary smelting process method, are subsequently cast, and further subjected to hot forging, cold rolling and solid-solution treatment so as to finally prepare the high-quality economical double-phase stainless steel with excellent sheet breakage elongation.
Description
Technical field
The present invention relates to a kind of economical diphase stainless steel of thin plate tension set excellence, belong to steel alloy material technical field.
Background technology
Duplex stainless steel is comprised of austenite and ferrite, but still there is intensity height and the poor contradiction of plasticity in the widespread use of existing economical diphase stainless steel, large and the low problem of thin plate unit elongation of its hot-work difficulty, under this background, deficiency for existing duplex stainless steel, be necessary that very much new generation has the economical diphase stainless steel of thin plate unit elongation excellence, this series products cold and hot working performance is better than existing duplex stainless steel, there is low-cost and excellent corrosion resisting property simultaneously, substitute traditional stainless steel kind, and be widely used in household electrical appliances, the field such as goods and sun power, further to promote breed structure optimization and the technical progress of China's stainless steel industry, and significantly reduce noble alloy resource interdependency, for national resources saving, make and should have contribution.
Summary of the invention
The object of the present invention is to provide a kind of low cost and there is good corrosion resistance and the high-performance diphase stainless steel alloy material of the thin plate tension set excellence of hot workability.
The high-performance economical diphase stainless steel alloy material of a class thin plate tension set excellence of the present invention, is characterized in that having following composition and mass percent: C≤0.06%, Mn≤1.5%, S≤0.01%, Si≤1.0%, P≤0.015%, Cr:19.0～22.0%, Mo:1.0-2.0, W:0.4-1.4%, Ni:3.0-5.0%, N:0.15～0.25%, B:0.001～0.01%, Rare-Earth Ce or Y:0.005～0.20%, rest part is iron.
The high-performance economical diphase stainless steel alloy material of a class thin plate tension set excellence of the present invention, adopt the conventional smelting process of tradition, after comprehensive batching is founded, casting, through forge hot, cold rolling, through solution treatment, finally make the economical diphase stainless steel alloy material of thin plate tension set excellence again.Steel in this composition range is two-phase region 700～1300 ℃ of scopes, and austenite content is about 35～55% variations, and the tensile break strength of room temperature is in 750～950Mpa scope, and yield strength is in 500～700Mpa scope, and tension set is in 60～80% scopes.
Mechanism of the present invention is as described below:
According to the principle of alloying principle and phase-change induced plastic (TRIP) effect, lot of experiments is found, this economical diphase stainless steel is controlled suitable composition and suitable solution treatment, and suitable cold and hot roll process, make duplex stainless steel in deformation process, produce a certain amount of martensitic transformation, thereby effectively improve its plasticity, make it in tensile deformation process, keep good stable unit elongation.
Embodiment
After now specific embodiments of the invention being described in.
embodiment 1
In the present embodiment, adopt composition and the mass percent of duplex stainless steel as follows:
Cr 20.5%
Mo 1.8%
W 0.7%
Ni 3.5%
Mn 0.5%
N 0.19%
C 0.029%
Ce 0.10%
Si 0.5%
S 0.004％
P 0.011％
B 0.001%
Fe surplus
Adopt the conventional smelting process of tradition, through comprehensive metering, calculate and after batching founds casting, ingot casting is through the solution treatment of forge hot, cold rolling and certain temperature, the room temperature tensile breaking tenacity of its thin plate is greater than 800MPa, and yield strength is greater than 600MPa, and tension set is greater than 70%.
embodiment 2
In the present embodiment, adopt composition and the weight percent of duplex stainless steel as follows:
Cr 19.5%
Mo 1.3%
W 1.0%
Ni 3.7%
Mn 0.7%
N 0.17%
C 0.046%
Ce 0.10%
Si 0.6%
S 0.003％
P 0.014％
B 0.001%
Fe surplus
Adopt the conventional smelting process of tradition, through comprehensive metering, calculate and after batching founds casting, ingot casting is through the solution treatment of forge hot, cold rolling and certain temperature, the room temperature tensile breaking tenacity of its thin plate is greater than 800MPa, and yield strength is greater than 600MPa, and tension set is greater than 65%.
embodiment 3
In the present embodiment, adopt composition and the weight percent of duplex stainless steel as follows:
Cr 21.5%
Mo 1.5%
W 1.3%
Ni 4.5%
Mn 1.5%
N 0.21%
C 0.035%
Ce 0.10%
Si 0.9%
S 0.005％
P 0.015％
B 0.001%
Fe surplus
Adopt the conventional smelting process of tradition, through comprehensive metering, calculate and after batching founds casting, ingot casting is through the solution treatment of forge hot, cold rolling and certain temperature, the room temperature tensile breaking tenacity of its thin plate is greater than 800MPa, and yield strength is greater than 600MPa, and tension set is greater than 60%.
The resistance to corrosion of such material and mechanical property are all better than 316L, are the optimal candidate materials of replacing 316L, can reduce material cost.In addition, this material has excellent cold and hot working, and its thin plate tension set is greater than 60%.
Claims (1)
1. a high-performance economical diphase stainless steel for thin plate tension set excellence, is characterized in that having following composition and mass percent: C≤0.06%, Mn≤1.5%, S≤0.01%, Si≤1.0%, P≤0.015%, Cr:19.0～22.0%, Mo:1.0-2.0, W:0.4-1.4%, Ni:3.0-5.0%, N:0.15～0.25%, B:0.001～0.01%, Rare-Earth Ce or Y:0.005～0.20%, rest part is iron; Adopt the conventional smelting process of tradition, after comprehensive batching is founded, casting, through forge hot, cold rolling, then through solution treatment, finally makes the high-performance economical diphase stainless steel alloy material of thin plate tension set excellence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410000434.1A CN103757555A (en) | 2014-01-02 | 2014-01-02 | Economical double-phase stainless steel with excellent sheet breakage elongation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410000434.1A CN103757555A (en) | 2014-01-02 | 2014-01-02 | Economical double-phase stainless steel with excellent sheet breakage elongation |
Publications (1)
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| CN103757555A true CN103757555A (en) | 2014-04-30 |
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| CN201410000434.1A Pending CN103757555A (en) | 2014-01-02 | 2014-01-02 | Economical double-phase stainless steel with excellent sheet breakage elongation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961991A (en) * | 2020-09-02 | 2020-11-20 | 燕山大学 | TRIP type duplex stainless steel with ultrahigh strength-elongation product and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010222695A (en) * | 2009-03-25 | 2010-10-07 | Nippon Steel & Sumikin Stainless Steel Corp | Alloy-saving two-phase stainless steel material having excellent corrosion resistance, and method for manufacturing the same |
| CN101935809A (en) * | 2010-09-10 | 2011-01-05 | 钢铁研究总院 | High performance rare-earth duplex stainless steel alloy material and preparation method thereof |
| CN103173687A (en) * | 2013-03-07 | 2013-06-26 | 上海大学 | Nickel-free economic double-phase stainless steel and its making method |
| JP2013204044A (en) * | 2012-03-27 | 2013-10-07 | Nippon Steel & Sumikin Stainless Steel Corp | Duplex stainless steel with high weldability |
-
2014
- 2014-01-02 CN CN201410000434.1A patent/CN103757555A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010222695A (en) * | 2009-03-25 | 2010-10-07 | Nippon Steel & Sumikin Stainless Steel Corp | Alloy-saving two-phase stainless steel material having excellent corrosion resistance, and method for manufacturing the same |
| CN101935809A (en) * | 2010-09-10 | 2011-01-05 | 钢铁研究总院 | High performance rare-earth duplex stainless steel alloy material and preparation method thereof |
| JP2013204044A (en) * | 2012-03-27 | 2013-10-07 | Nippon Steel & Sumikin Stainless Steel Corp | Duplex stainless steel with high weldability |
| CN103173687A (en) * | 2013-03-07 | 2013-06-26 | 上海大学 | Nickel-free economic double-phase stainless steel and its making method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961991A (en) * | 2020-09-02 | 2020-11-20 | 燕山大学 | TRIP type duplex stainless steel with ultrahigh strength-elongation product and preparation method thereof |
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Application publication date: 20140430 |