CN104593681A - High-chromium nickel-free antibacterial dual-phase stainless steel - Google Patents
High-chromium nickel-free antibacterial dual-phase stainless steel Download PDFInfo
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- CN104593681A CN104593681A CN201510034010.1A CN201510034010A CN104593681A CN 104593681 A CN104593681 A CN 104593681A CN 201510034010 A CN201510034010 A CN 201510034010A CN 104593681 A CN104593681 A CN 104593681A
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Abstract
The invention discloses a high-chromium nickel-free antibacterial dual-phase stainless steel and belongs to the field of steel alloy materials. The dual-phase stainless steel is used for solving the problem that the stainless steel is high in production cost and high in nickel content and cannot be used in pumps, valves and meter cases in a drinking water network, food mechanical mincers and kitchen and bath products. The dual-phase stainless steel comprises the following chemical components in percentages by weight: 22.0-26.0% of Cr, 0.8-1.2% of Mo, 0.16-0.30% of N, 0.8-1.2% of Mn, 1.0-1.4% of Al, 0.6-1.0% of Si, 0.0003-0.0006% of Ag, 0.005-0.008% of Ti, less than or equal to 0.03% of P, less than or equal to 0.03% of S and the balance of Fe. The dual-phase stainless steel is mainly used for pumps, valves and meter cases in the drinking water network, food mechanical mincers and the like.
Description
Technical field
The present invention relates to a kind of stainless steel, be specifically related to a kind of high chromium without nickel antibacterial duplex stainless steel, belong to steel alloy material field.
Background technology
Duplex stainless steel refers to the stainless steel that its tissue is made up of austenite phase and ferritic phase.Such steel has the feature of austenite and ferritic stainless steel concurrently, and with ferritic phase ratio, plasticity, toughness are higher, without brittleness at room temperature, intergranular corrosion resistance performance and welding property are significantly increased, and the 475 DEG C of fragility and the thermal conductivity that also maintain ferritic stainless steel high simultaneously, has the features such as superplasticity.Compared with austenitic stainless steel, intensity high and intergranular corrosion resistance and resistance to muriate stress corrosion are significantly improved.Duplex stainless steel has excellent resistance to pitting performance, is also a kind of joint nickel and stainless steel.
Along with the high speed development of national economy and the continuous progress of society, health is more and more subject to showing great attention to of people.Water is Source of life, and water is purer, and people is more healthy.Water meter relation water safety maintains you, and I am healthy.Water meter is ordinary people always, Zhi Shui enterprise, infrastructure management company pay the important measurement instrument receiving water rate, hardly realizes that also the moment also exists and is related to our healthy and important knowledge that is economic interests a slight water meter.Country's dispatch forbids that gray iron water meter enters water meter market after in July, 2012, the rough ambient condition can trembling with fear extremely hot because of the not resistance to sky of plastic table, the high quality requirement of pump works to water meter can not be met, indoor table of metalling run out also needs normal maintain and replace, water safety without guarantee, so can not market demands be met.304 trade mark stainless steel water meters are not owing to meeting healthy water requirement standard (nickel is far more than 0.2%), and waste precious metal nickel, production cost is high.Therefore design high chromium and have important practical application meaning without nickel antibacterial duplex stainless steel, this kind of stainless steel can be widely used in pump, valve, watchcase and the food machinery mincer etc. drunk in the network of rivers.
Summary of the invention
The object of the present invention is to provide a kind of high chromium without nickel antibacterial duplex stainless steel, high to solve existing stainless steel production cost, nickel content is high, is not suitable for being applied to the defect of the pump drunk in the network of rivers, valve, watchcase and food machinery mincer etc.
The present invention is achieved by the following technical solutions:
High chromium is without nickel antibacterial duplex stainless steel, and chemical composition by weight percentage consists of:
Cr:22.0 ~ 26.0; Mo:0.8 ~ 1.2; N:0.16 ~ 0.30; Mn:0.8 ~ 1.2; Al:1.0 ~ 1.4; Si:0.6 ~ 1.0; Ag:0.0003-0.0006; Ti:0.005-0.008; P≤0.03; S≤0.03; Surplus is Fe.
Preferably, high chromium is without nickel antibacterial duplex stainless steel, and chemical composition by weight percentage consists of:
Cr:22.0; Mo:1.0; N:0.16; Mn:1.0; Al:1.2; Si:0.8; Ag:0.0003-0.0006; Ti:0.005-0.008; P≤0.03; S≤0.03; Surplus is Fe.
Described Fe derives from not nickeliferous discarded stainless steel, has not only saved cost, and makes refuse obtain recycle, protects environment.
Described Ag is selected from the one in aluminium silver alloys or manganese silver alloys.
Described N is selected from N
2or the one in nitrogen Chrome metal powder, wherein N
2the mode adopting bottom to be blown into adds.
Height chromium of the present invention is without the working method of nickel antibacterial duplex stainless steel: there is no for adapting to current medium-sized and small enterprises or seldom have the present situation of the refining furnaces such as AOD, VOD, and adopt medium-frequency induction furnace, use absolutely waste stainless steel (bits) change steel, decarburization, reduction, refining one step to complete.
Chromium is the element determining stainless steel attribute, is to obtain stainless steel rustless property and corrosion proof guarantee, and high chromium-stainless steel corrosion resistant performance is far more than 304 series stainless steels.
The effect of nitrogen in stainless steel be formed very consumingly, stable and expand austenitic area, nitrogen can significantly improve the intensity of material in stainless steel under the prerequisite of not obvious reduction material plasticity and toughness, can also improve stainless corrosion resistance and creep-resistant property.
Manganese can improve the solubleness of nitrogen in steel, adopts appropriate cheap manganese and nitrogen effectively can stablize austenite structure in duplex stainless steel, thus reduces the use content of metallic nickel.
Silver has excellent antibacterial ability, and its sterilizing ability is 100 times of copper, is 800 times of nickel.
The modifying function of titanium, the element good with various consistency produces synergistic effect, improves stainless erosion resistance, intensity comprehensively, makes it have good castability and processing characteristics; Titanium can make the dense internal organization of steel, crystal grain thinning power; Reduce aging sensitivity and cold shortness, improving welding property.
It is the passivation protection film of main component that molybdenum can be strengthened with Cr, can improve the anti-stress-corrosion crack of duplex stainless steel.Molybdenum can make the grain refining of steel, improves hardening capacity and thermostrength, and can keep enough intensity and creep resisting ability, improves mechanical property.
Compared with prior art the invention has the beneficial effects as follows:
(1) by regulating high chromium without each element proportioning of nickel antibacterial duplex stainless steel, not only making production cost greatly lower, and its corrosion resistance and creep-resistant property are improved greatly, and there is good antimicrobial property, castability, hot workability;
(2) height chromium of the present invention is not nickeliferous without nickel antibacterial duplex stainless steel, is mainly used in the pump drunk in the network of rivers, valve, watchcase and food machinery mincer and kitchen guarding's goods;
(3) nickel of high price is replaced greatly to reduce production cost with chromium at a low price, nitrogen, manganese.
Specific embodiment
Below in conjunction with embodiment, the present invention is being further described.
Embodiment 1
A kind of high chromium is without nickel antibacterial duplex stainless steel, and chemical composition by weight percentage consists of: Cr:22.0; Mo:0.8; N:0.16; Mn:0.8; Al:1.0; Si:0.6; Ag:0.0003; Ti:0.005; P:0.03; S:0.03; Surplus is Fe.
Embodiment 2
A kind of high chromium is without nickel antibacterial duplex stainless steel, and chemical composition by weight percentage consists of: Cr:26.0; Mo:1.2; N:0.30; Mn:1.2; Al:1.4; Si:1.0; Ag:0.0006; Ti:0.008; P:0.02; S:0.01; Surplus is Fe.
Embodiment 3
A kind of high chromium is without nickel antibacterial duplex stainless steel, and chemical composition by weight percentage consists of: Cr:24.0; Mo:1.0; N:0.20; Mn:1.0; Al:1.3; Si:0.8; Ag:0.0005; Ti:0.006; P:0.01; S:0.02; Surplus is Fe.
Embodiment 4
A kind of high chromium is without nickel antibacterial duplex stainless steel, and chemical composition by weight percentage consists of: Cr:22.0; Mo:1.0; N:0.16; Mn:1.0; Al:1.2; Si:0.8; Ag:0.0004; Ti:0.005; P:0.01; S:0.01; Surplus is Fe.
Claims (3)
1. high chromium is without a nickel antibacterial duplex stainless steel, it is characterized in that chemical composition is by weight percentage:
Cr:22.0 ~ 26.0; Mo:0.8 ~ 1.2; N:0.16 ~ 0.30; Mn:0.8 ~ 1.2; Al:1.0 ~ 1.4; Si:0.6 ~ 1.0; Ag:0.0003-0.0006; Ti:0.005-0.008; P≤0.03; S≤0.03; Surplus is Fe.
2. high chromium according to claim 1 is without nickel antibacterial duplex stainless steel, it is characterized in that chemical composition is by weight percentage:
Cr:22.0; Mo:1.0; N:0.16; Mn:1.0; Al:1.2; Si:0.8; Ag:0.0003-0.0006; Ti:0.005-0.008; P≤0.03; S≤0.03; Surplus is Fe.
3. high chromium according to claim 1 and 2 is without nickel antibacterial duplex stainless steel, it is characterized in that: described Ag is selected from the one in aluminium silver alloys or manganese silver alloys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510034010.1A CN104593681A (en) | 2015-01-22 | 2015-01-22 | High-chromium nickel-free antibacterial dual-phase stainless steel |
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| CN201510034010.1A CN104593681A (en) | 2015-01-22 | 2015-01-22 | High-chromium nickel-free antibacterial dual-phase stainless steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110938782A (en) * | 2019-10-30 | 2020-03-31 | 武汉科技大学 | Low-cost heat-resistant steel and preparation method thereof |
Citations (5)
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| CN101457328A (en) * | 2009-01-04 | 2009-06-17 | 上海大学 | High chromium, high manganese and high nitrogen biphase stainless steel and preparation method thereof |
| CN101956143A (en) * | 2010-11-25 | 2011-01-26 | 福州大学 | Silver-contained antibacterial super duplex-phase stainless steel and fabrication method thereof |
| CN102383047A (en) * | 2011-10-31 | 2012-03-21 | 江苏亚盛金属制品有限公司 | High-nitrogen nickel-free super two-phase stainless steel |
| CN103173687A (en) * | 2013-03-07 | 2013-06-26 | 上海大学 | Nickel-free economic double-phase stainless steel and its making method |
| JP2013185231A (en) * | 2012-03-09 | 2013-09-19 | Nippon Steel & Sumikin Stainless Steel Corp | Ferrite-austenite 2-phase stainless steel plate having low in-plane anisotropy and method for producing the same |
-
2015
- 2015-01-22 CN CN201510034010.1A patent/CN104593681A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457328A (en) * | 2009-01-04 | 2009-06-17 | 上海大学 | High chromium, high manganese and high nitrogen biphase stainless steel and preparation method thereof |
| CN101956143A (en) * | 2010-11-25 | 2011-01-26 | 福州大学 | Silver-contained antibacterial super duplex-phase stainless steel and fabrication method thereof |
| CN102383047A (en) * | 2011-10-31 | 2012-03-21 | 江苏亚盛金属制品有限公司 | High-nitrogen nickel-free super two-phase stainless steel |
| JP2013185231A (en) * | 2012-03-09 | 2013-09-19 | Nippon Steel & Sumikin Stainless Steel Corp | Ferrite-austenite 2-phase stainless steel plate having low in-plane anisotropy and method for producing the same |
| 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 |
|---|---|---|---|---|
| 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 |
| CN110938782A (en) * | 2019-10-30 | 2020-03-31 | 武汉科技大学 | Low-cost heat-resistant steel and preparation method thereof |
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Application publication date: 20150506 |
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