CN102191440A - Economical antibacterial duplex stainless steel and preparation method thereof - Google Patents
Economical antibacterial duplex stainless steel and preparation method thereof Download PDFInfo
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- CN102191440A CN102191440A CN 201110144635 CN201110144635A CN102191440A CN 102191440 A CN102191440 A CN 102191440A CN 201110144635 CN201110144635 CN 201110144635 CN 201110144635 A CN201110144635 A CN 201110144635A CN 102191440 A CN102191440 A CN 102191440A
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Abstract
The invention relates to economical antibacterial duplex stainless steel and a preparation method thereof, belonging to technical field of the steel alloy material. The nitrogen-containing economical antibacterial duplex stainless steel comprises the following components by weight percent: more than 0 and no more than 0.03% of C, 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, 18.0-20.0% of Cr, 1.5-2.5% of Ni, 0.5-1.5% of Mo, 0.5-2.0% of Cu, 0.15-0.25% of N, 0.001-0.01% of B, 0.005-0.20% of rare earth element Ce or Y and the of balance iron. The traditional and conventional smelting process is adopted and the adding method of intermediate alloy sealed with the pure iron pipe is adopted when materials are fed, namely Fe-Ce intermediate alloy or Fe-Y intermediate alloy is prepared in advance, comprehensive dosing and melting is performed, then casting moulding is performed, and certain solution-aging treatment is performed to finally prepare the nitrogen-containing economical antibacterial duplex stainless steel. The antibacterial duplex stainless steel has low cost and good corrosion resistance and bactericidal property.
Description
Technical field
The present invention relates to a kind of economical antibiotic high-performance diphase stainless steel and preparation method thereof, belong to steel and alloy material technology field.
Background technology
Duplex stainless steel is made up of austenite and ferrite.The main component of duplex stainless steel is chromium, nickel, molybdenum, and wherein nickel is the most expensive; In order to reduce cost, reduce the content of nickel in the steel, can adopt alloying elements such as adding nitrogen, copper.Along with the development of AOD, VOD refinery practice, especially can control the adding of nitrogen in the AOD stove, also promoted the exploitation of nitrogen bearing duplex stainless steel, as its nitrogen content of 2205 steel about 0.15%.The adding of nitrogen has not only improved the anti-local corrosion performance of steel, and has solved stainless Welding Problems, makes duplex stainless steel become a kind of welding structured material, has expanded the range of application of duplex stainless steel greatly.The reduction with cost of further developing along with metallurgical technology, add-on to nitrogen also can accurately be controlled, thereby new low nickel high-nitrogen super duplex stainless steel has appearred, as its nitrogen content of UNSS32750(0.25～0.35%, nickel content is about 6～8%) and its nitrogen content of UNSS32906(0.30～0.40%, nickel content is about 5.8～7.5%).Ratio by suitable chromium, nickel, molybdenum, copper and nitrogen etc. cooperates, and sophisticated thermal treatment process, chromium can improved, nitrogen, obtain ideal phase ratio when reducing nickel, molybdenum, so not only improve the mechanical property of duplex stainless steel, and its corrosion resistance also is greatly improved.In addition, because metallic nickel price volalility in recent years is very serious, the content that reduces nickel in the stainless steel helps keeping the stable of stainless steel market.So the scientific research personnel keeps the stable this respect in stainless steel market to do a large amount of explorations when improving stainless performance.
The research of anti-bacteria stainless steel starts from the nineties in 20th century, through ten years development, develop multiple germ resistance stainless steel, but add the two-phase proportion in the alloying element change duplex stainless steel, brought difficulty for the exploitation of antimicrobial form duplex stainless steel, therefore the anti-bacteria stainless steel of existing exploitation mostly is ferrite antibacterial stainless steel, austenite antimicrobial stainless steel and martensite antimicrobial stainless steel.
Summary of the invention
The object of the present invention is to provide a kind of low cost and have good corrosion resistance and bactericidal economical antibacterial duplex stainless steel alloy material.
Nitrogenous economical antibacterial duplex stainless steel alloy material of the present invention is characterized in that having following composition and mass percent:
0＜C≤0.04%, S≤0.01%, Si≤1.0%, P≤0.015%, Cr:18.0～20.0%, Ni:1.5 ~ 2.5%, Mo:0.5～1.5%, Cu:0.5～2.0%, N:0.15～0.25%, B:0.001～0.01%, Rare-Earth Ce or Y:0.005～0.20%, rest part are iron.
The preparation method of the nitrogenous economical antibacterial duplex stainless steel alloy material of the present invention is characterized in that: adopt the conventional smelting process of tradition, adopt pure iron seal of tube master alloy throw-in play when feeding intake, be i.e. the master alloy that need use well of prepared beforehand; Master alloy is made up of iron and rare earth metal, selects Fe-Ce or Fe-Y master alloy for use; Both compositions are respectively: the quality percentage composition of Ce is 23.5% in the Fe-Ce master alloy; The quality percentage composition of Y is 15% in the Fe-Y master alloy; After comprehensive batching was founded, casting finally made nitrogenous economical antibacterial duplex stainless steel alloy material.Steel in this composition range is the two-phase region 850～1200 ℃ of scopes, austenite content is about 40～60% variations, and through certain solution treatment, the tensile break strength of room temperature is in 850～1100Mpa scope, yield strength is in 400～650Mpa scope, and tension set is in 25～45% scopes.Through certain antimicrobial treatment, sterilizing rate is 99.99%.
Mechanism of the present invention is as described below:
Can enlarge the principle of austenitic area according to copper, the lot of experiments development is added an amount of copper and can be substituted part of nickel and reach stable austenite phase purpose; Simultaneously nitrogen can replace nickel and the rare earth action principle in steel, also can stablize austenite in the dual phase steel with proper amount of cheap nitrogen, thereby reduces the consumption of valuable nickel; And after in this double phase stainless steel alloy, adding Rare-Earth Ce or Y, sulphur content in the alloy reduces or forms dystectic rare-earth sulfide disperse greatly in matrix, avoid low melting point sulfide to be present on the phase boundary, thereby improved the high temperature thermoplasticity of steel effectively.
Copper is finished and is adjusted the two phase structure effect after the certain temperature ageing treatment can be separated out ε-Cu phase, and ε-Cu has certain bactericidal property.Can make the bactericidal property that improves economical anti-bacteria stainless steel by adjusting aging temp and timeliness time.
Embodiment
After now specific embodiments of the invention being described in.
Embodiment 1
In the present embodiment, adopt the composition and the mass percent of duplex stainless steel as follows:
Cr 18.7%
Ni 2.1%
Cu 0.5%
Mo 1.0%
N 0.20%
C 0.026%
Rare-Earth Ce 0.10%
Si 0.7%
S 0.005％
P 0.011％
B 0.003%
The Fe surplus
Adopt the conventional smelting process of tradition, when feeding intake, adopt pure iron seal of tube master alloy throw-in play, i.e. the good master alloy of prepared beforehand.The alloy that consists of Fe and Ce of master alloy, the quality percentage composition of Ce is 23.5% in the Fe-Ce master alloy.Calculate and after batching founded, casting finally made nitrogenous ultralow nickel duplex stainless steel alloy material through comprehensive metering.As cast condition is 1050 ℃ of solution treatment after forge hot, and its room temperature tensile breaking tenacity is greater than 1000MPa, and yield strength is greater than 600MPa, and tension set is greater than 30%.800 ℃ of timeliness, its sterilizing rate are 86.7%.
Embodiment 2
In the present embodiment, adopt the composition and the weight percent of duplex stainless steel as follows:
Cr 19.1%
Ni 1.8%
Cu 0.9%
Mo 0.9%
N 0.21%
C 0.025%
Rare-Earth Ce 0.10%
Si 0.60%
S 0.004%
P 0.010%
B 0.004%
The Fe surplus
Adopt the conventional smelting process of tradition, when feeding intake, adopt pure iron seal of tube master alloy throw-in play.It is the good master alloy of prepared beforehand.The alloy that consists of Fe and Ce of master alloy, the quality percentage composition of Ce is 23.5% in the Fe-Ce master alloy.Calculate and after batching founded, casting finally made the high nitrogen and low nickel duplex stainless steel alloy material through comprehensive metering.As cast condition is 1050 ℃ of solution treatment after forge hot, and its room temperature tensile breaking tenacity is greater than 900MPa, and yield strength is greater than 580MPa, and tension set is greater than 38%.800 ℃ of timeliness, its sterilizing rate are 99.99%.
Embodiment 3
In the present embodiment, adopt the composition and the weight percent of duplex stainless steel as follows:
Cr 19.2%
Ni 1.8%
Mo 1.2%
Cu 1.50%
N 0.18%
C 0.027%
Rare-Earth Ce 0.10%
Si 0.50%
S 0.004%
P 0.010%
B 0.002%
The Fe surplus
Adopt the conventional smelting process of tradition, when feeding intake, adopt pure iron seal of tube master alloy throw-in play.It is the good master alloy of prepared beforehand.The alloy that consists of Fe and Ce of master alloy, the quality percentage composition of Ce is 23.5% in the Fe-Ce master alloy.Calculate and after batching founded, casting finally made the high nitrogen and low nickel duplex stainless steel alloy material through comprehensive metering.As cast condition is 1050 ℃ of solution treatment after forge hot, and its room temperature tensile breaking tenacity is greater than 1000MPa, and yield strength is greater than 430MPa, and tension set is greater than 32%.800 ℃ of timeliness, its sterilizing rate are 99.99%.
Claims (2)
1. an economical antibacterial duplex stainless steel is characterized in that having following composition and mass percent: 0＜C≤0.04%, S≤0.01%, Si≤1.0%, P≤0.015%, Cr:18.0～20.0%, Ni:1.5～2.5%, Mo:0.5～1.5%, Cu:0.5～2.0%, N:0.15～0.25%, B:0.001～0.01%, Rare-Earth Ce or Y:0.005～0.20%, rest part are iron.
2. press the preparation method of the described economical antibacterial duplex stainless steel of claim 1, it is characterized in that: adopt the conventional smelting process of tradition, adopt pure iron seal of tube rare earth intermediate alloy input when feeding intake, rare earth intermediate alloy is selected Fe-Ce or Fe-Y master alloy for use; Both compositions are respectively: the quality percentage composition of Ce is 23.5% in the Fe-Ce master alloy, and the quality percentage composition of Y is 15% in the Fe-Y master alloy; After batching was founded, casting was handled through solid solution aging again, finally makes economical antibacterial duplex stainless steel.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994903A (en) * | 2012-12-10 | 2013-03-27 | 上海大学 | Duplex stainless steel with paradoxical phase proportion change and preparation method thereof |
| CN103014525A (en) * | 2012-12-10 | 2013-04-03 | 上海大学 | High-silicon double-phase stainless steel and preparation method thereof |
| CN106337105A (en) * | 2016-08-29 | 2017-01-18 | 中国科学院金属研究所 | Heat treatment method for antibacterial double-phase stainless steel material |
| CN107881413A (en) * | 2017-10-18 | 2018-04-06 | 江苏理工学院 | A kind of antibacterial duplex stainless steel and its processing technology |
| CN109023072A (en) * | 2018-09-04 | 2018-12-18 | 合肥久新不锈钢厨具有限公司 | A kind of high stability corrosion-resistant stainless steel and preparation method thereof |
| CN109825758A (en) * | 2018-12-21 | 2019-05-31 | 南京沃尔德特钢有限公司 | A kind of antibacterial duplex stainless steel |
| CN111593269A (en) * | 2020-05-26 | 2020-08-28 | 上海大学 | Antimicrobial adhesion seawater corrosion resistant duplex stainless steel for ship pump valve and preparation method and application thereof |
| CN114855094A (en) * | 2022-05-23 | 2022-08-05 | 东北大学 | Corrosion-resistant antibacterial martensitic stainless steel and preparation method and application thereof |
| EP4006185A4 (en) * | 2019-07-31 | 2022-11-02 | JFE Steel Corporation | Austenitic-ferritic duplex stainless steel plate |
| CN115948635A (en) * | 2023-03-09 | 2023-04-11 | 太原科技大学 | Copper-containing antibacterial stainless steel and surface treatment process thereof |
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| JPH0741906A (en) * | 1993-07-28 | 1995-02-10 | Nippon Yakin Kogyo Co Ltd | Superplastic two-phase stainless steel |
| CN1970815A (en) * | 2006-07-21 | 2007-05-30 | 上海大学 | Rare earth-containing high-nitrogen ultralow-nickel super-duplex stainless steel alloy materials and method for preparing same |
| CN101215675A (en) * | 2008-01-08 | 2008-07-09 | 上海大学 | Resource-saving diphase stainless steel alloy material and preparation method thereof |
| CN101215674A (en) * | 2008-01-08 | 2008-07-09 | 上海大学 | Economical diphase stainless steel alloy material and preparation method thereof |
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Patent Citations (4)
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| JPH0741906A (en) * | 1993-07-28 | 1995-02-10 | Nippon Yakin Kogyo Co Ltd | Superplastic two-phase stainless steel |
| CN1970815A (en) * | 2006-07-21 | 2007-05-30 | 上海大学 | Rare earth-containing high-nitrogen ultralow-nickel super-duplex stainless steel alloy materials and method for preparing same |
| CN101215675A (en) * | 2008-01-08 | 2008-07-09 | 上海大学 | Resource-saving diphase stainless steel alloy material and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994903A (en) * | 2012-12-10 | 2013-03-27 | 上海大学 | Duplex stainless steel with paradoxical phase proportion change and preparation method thereof |
| CN103014525A (en) * | 2012-12-10 | 2013-04-03 | 上海大学 | High-silicon double-phase stainless steel and preparation method thereof |
| CN106337105A (en) * | 2016-08-29 | 2017-01-18 | 中国科学院金属研究所 | Heat treatment method for antibacterial double-phase stainless steel material |
| CN106337105B (en) * | 2016-08-29 | 2018-02-16 | 中国科学院金属研究所 | A kind of heat treatment method of antibacterial duplex stainless steel material |
| CN107881413A (en) * | 2017-10-18 | 2018-04-06 | 江苏理工学院 | A kind of antibacterial duplex stainless steel and its processing technology |
| CN109023072A (en) * | 2018-09-04 | 2018-12-18 | 合肥久新不锈钢厨具有限公司 | A kind of high stability corrosion-resistant stainless steel and preparation method thereof |
| CN109825758A (en) * | 2018-12-21 | 2019-05-31 | 南京沃尔德特钢有限公司 | A kind of antibacterial duplex stainless steel |
| EP4006185A4 (en) * | 2019-07-31 | 2022-11-02 | JFE Steel Corporation | Austenitic-ferritic duplex stainless steel plate |
| CN111593269A (en) * | 2020-05-26 | 2020-08-28 | 上海大学 | Antimicrobial adhesion seawater corrosion resistant duplex stainless steel for ship pump valve and preparation method and application thereof |
| CN114855094A (en) * | 2022-05-23 | 2022-08-05 | 东北大学 | Corrosion-resistant antibacterial martensitic stainless steel and preparation method and application thereof |
| CN115948635A (en) * | 2023-03-09 | 2023-04-11 | 太原科技大学 | Copper-containing antibacterial stainless steel and surface treatment process thereof |
| CN115948635B (en) * | 2023-03-09 | 2023-05-09 | 太原科技大学 | Copper-containing antibacterial stainless steel and surface treatment process thereof |
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Application publication date: 20110921 |