CN103757559A - Economical type duplex stainless steel with phase change plastification effect - Google Patents
Economical type duplex stainless steel with phase change plastification effect Download PDFInfo
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- CN103757559A CN103757559A CN201410000448.3A CN201410000448A CN103757559A CN 103757559 A CN103757559 A CN 103757559A CN 201410000448 A CN201410000448 A CN 201410000448A CN 103757559 A CN103757559 A CN 103757559A
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Abstract
The invention relates to an economic type duplex stainless steel with a phase change plastification effect, belonging to the technical field of steel and iron alloy materials. The economical type duplex stainless steel comprises the following components in percentage by weight: not more than 0.03 percent of C, not more than 0.03 percent of S, not more than 0.03 percent of P, 19.0-21.0 percent of Cr, 8-12 percent of Mn, 0.1-0.5 percent of Ni, 0.15-0.35 percent of N, not more than 1.0 percent of Si, 0.001-0.01 percent of B, 0.005-0.20 percent of rare earth Ce or Y and the balance of Fe. A conventional melting process method is adopted and comprehensive ingredients are melted, are poured and formed, and are subjected to solution treatment, thus obtaining the economical type duplex stainless steel with quite good phase change plastification effect and elongation.
Description
Technical field
The present invention relates to one and there is the particularly preferred duplex stainless steel of phase transformation plasticization effect unit elongation, belong to steel alloy material technical field.
Background technology
Duplex stainless steel is comprised of austenite and ferrite.The main component of duplex stainless steel is chromium, nickel, molybdenum, in order to reduce costs, reduces the content of nickel in steel, can adopt alloying elements such as adding nitrogen, manganese.Along with the further sustainable growth of domestic stainless steel production capacity and apparent consumption demand, the problem of chromium and molybdenum resource has emerged and is increasingly outstanding, still there is intensity height and the poor contradiction of plasticity in the widespread use of existing economical diphase stainless steel simultaneously, large and the low problem of thin plate unit elongation of its hot-work difficulty, under this background, for the deficiency of existing duplex stainless steel, be necessary that very much new generation has the duplex stainless steel of the particularly preferred resource-conserving of phase-change induced plastic (TRIP) effect unit elongation, 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 one to there is phase transformation plasticization effect and the particularly preferred economical diphase stainless steel of unit elongation.
Economical diphase stainless steel of the present invention, it is characterized in that thering is following composition and mass percent: C≤0.03%, S≤0.03%, P≤0.03%, Cr:19.0～21.0%, Mn:8～12%, Ni:0.1～0.5%, N:0.15 ~ 0.35%, Si≤1.0%, B:0.001～0.01%, Rare-Earth Ce or Y:0.005～0.20%, surplus is iron.
The preparation method of the economical diphase stainless steel alloy material with TRIP effect of the present invention, is characterized in that: adopt the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into, prepare in advance the master alloy that needs use; Master alloy is comprised of iron and rare earth metal, selects Fe-Ce or Fe-Y master alloy; Both compositions are respectively: in Fe-Ce master alloy, the quality percentage composition of Ce is 23.5%; In Fe-Y master alloy, the quality percentage composition of Y is 15%; After comprehensive batching is founded, casting, through forge hot, cold rolling, then through solution treatment, finally makes the duplex stainless steel with TRIP effect.Steel in this composition range is two-phase region 850～1300 ℃ of scopes, austenite content changes about 30～60%, through forge hot and cold rolling, again through certain temperature solution treatment, the tensile break strength of room temperature is in 800～1000Mpa scope, yield strength is in 500～700Mpa scope, and tension set is in 55～75% scopes.
Mechanism of the present invention is as described below:
According to alloying principle, with Mn and N, for nickel, stable austenite, reduces noble metal nickel content.According to the principle of phase-change induced plastic (TRIP) effect, lot of experiments is found, the composition that the control of this economical diphase stainless steel is suitable 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 19.8%
Ni 0.3%
Mn 8.5%
C 0.026%
Rare-Earth Ce 0.10%
N 0.206%
S 0.004%
Si 0.5%
P 0.006%
B 0.001%
Fe surplus
Adopt the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into.Through comprehensive metering, calculate and after batching founds, casting, through forge hot and cold rolling, again through certain solution treatment, finally make the diphase stainless steel alloy material with TRIP effect, the room temperature tensile breaking tenacity of this material is greater than 850MPa, and yield strength is greater than 500MPa, and tension set is greater than 55%.
embodiment 2
In the present embodiment, adopt composition and the mass percent of duplex stainless steel as follows:
Cr 20.1%
Ni 0.3%
Mn 10.2%
C 0.028%
Rare-Earth Ce 0.10%
N 0.261%
Si 0.8%
S 0.002%
P 0.009%
B 0.002%
Fe surplus
Adopt the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into.Through comprehensive metering, calculate and after batching founds, casting, through forge hot, cold rolling, through suitable solution treatment, finally make the duplex stainless steel with TRIP effect again, its room temperature tensile breaking tenacity is greater than 850MPa, yield strength is greater than 500MPa, and tension set is greater than 65%.
embodiment 3
In the present embodiment, adopt composition and the mass percent of duplex stainless steel as follows:
Cr 20.8%
Ni 0.3%
Mn 11.5%
C 0.021%
Rare-Earth Ce 0.10%
N 0.35%
Si 0.5%
S 0.003%
P 0.007%
B 0.0015%
Fe surplus
Adopt the conventional smelting process of tradition, before casting, rare earth intermediate alloy is dropped into.Through comprehensive metering, calculate and after batching founds, casting, through forge hot and cold rolling, through certain solution treatment, finally make the diphase stainless steel alloy material with TRIP effect again, its room temperature tensile breaking tenacity is greater than 900MPa, yield strength is greater than 500MPa, and tension set is greater than 65%.
Such two-phase stainless steel has excellent plasticity, has good corrosion resisting property simultaneously, can be used as the aspects such as automobile, general instruments engineering, is the optimal candidate material of replacing 304 series, can significantly reduce material cost and reduce material usage.In addition, this material has good hot workability in 850～1300 ℃, has excellent cold-forming property simultaneously.
Claims (1)
1. one kind has the economical diphase stainless steel of phase transformation plasticization effect, it is characterized in that this duplex stainless steel has following composition and mass percent: C≤0.03%, S≤0.03%, P≤0.03%, Cr:19.0～21.0%, Mn:8～12%, Ni:0.1～0.5%, N:0.15 ~ 0.35%, Si≤1.0%, B:0.001～0.01%, Rare-Earth Ce or Y:0.005～0.20%, surplus is iron; This duplex stainless steel adopts conventional smelting process, and after batching is founded, casting, through forge hot, cold rolling, then through solution treatment, finally makes the economical diphase stainless steel with phase transformation plasticization effect.
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| CN201410000448.3A CN103757559B (en) | 2014-01-02 | 2014-01-02 | There is the economical diphase stainless steel of phase transformation plasticization effect |
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| CN201410000448.3A CN103757559B (en) | 2014-01-02 | 2014-01-02 | There is the economical diphase stainless steel of phase transformation plasticization effect |
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| CN103757559A true CN103757559A (en) | 2014-04-30 |
| CN103757559B CN103757559B (en) | 2016-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440014A (en) * | 2019-01-14 | 2019-03-08 | 东北大学 | A kind of low chrome content, low nickel two phase stainless steel and preparation method thereof |
| CN109487172A (en) * | 2019-01-14 | 2019-03-19 | 东北大学 | One kind having excellent thermoplastic two phase stainless steel and preparation method thereof |
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|---|---|---|---|---|
| JP2003089851A (en) * | 2001-09-14 | 2003-03-28 | Nisshin Steel Co Ltd | High strength duplex stainless steel sheet having high elasticity, and production method therefor |
| CN101215674A (en) * | 2008-01-08 | 2008-07-09 | 上海大学 | Economical diphase stainless steel alloy material and preparation method thereof |
| CN102251193A (en) * | 2011-07-06 | 2011-11-23 | 上海大学 | Economical biphase stainless steel with excellent corrosion resistance and preparation method thereof |
| CN102766823A (en) * | 2012-07-17 | 2012-11-07 | 上海大学 | Duplex stainless steel with phase change plastification effect 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 |
-
2014
- 2014-01-02 CN CN201410000448.3A patent/CN103757559B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089851A (en) * | 2001-09-14 | 2003-03-28 | Nisshin Steel Co Ltd | High strength duplex stainless steel sheet having high elasticity, and production method therefor |
| CN101215674A (en) * | 2008-01-08 | 2008-07-09 | 上海大学 | Economical diphase stainless steel alloy material and preparation method thereof |
| CN102251193A (en) * | 2011-07-06 | 2011-11-23 | 上海大学 | Economical biphase stainless steel with excellent corrosion resistance and preparation method thereof |
| CN102766823A (en) * | 2012-07-17 | 2012-11-07 | 上海大学 | Duplex stainless steel with phase change plastification effect 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440014A (en) * | 2019-01-14 | 2019-03-08 | 东北大学 | A kind of low chrome content, low nickel two phase stainless steel and preparation method thereof |
| CN109487172A (en) * | 2019-01-14 | 2019-03-19 | 东北大学 | One kind having excellent thermoplastic two phase stainless steel and preparation method thereof |
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|---|---|
| CN103757559B (en) | 2016-08-17 |
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Effective date of registration: 20190312 Address after: 225300 Luomu Industrial Concentration Zone, Zhangguo Town, Xinghua City, Taizhou City, Jiangsu Province Patentee after: TAIZHOU XINLONGXIANG METAL PRODUCT CO., LTD. Address before: No. 99, Baoshan District Road, Shanghai, Shanghai Patentee before: Shanghai University |
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