CN1050227A - Magnetism-free stainless steel - Google Patents
Magnetism-free stainless steel Download PDFInfo
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- CN1050227A CN1050227A CN 90107850 CN90107850A CN1050227A CN 1050227 A CN1050227 A CN 1050227A CN 90107850 CN90107850 CN 90107850 CN 90107850 A CN90107850 A CN 90107850A CN 1050227 A CN1050227 A CN 1050227A
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Abstract
The invention belongs to field of Austenitic stainless steel.Mainly be applicable to the austenite one phase magnetism-free stainless steel of making the electrical equipment component.Steel of the present invention has been adjusted each the constituent content scope in the steel grade according to deficiency of the prior art, and make steel of the present invention have matrix and stablize, after 20%～80% distortion, still be single-phase austenite structure, and the permeability performance is stable.Steel of the present invention has also simultaneously that the cold and hot working performance is good, and hardening coefficient is low, and the cold-heading deformation rate reaches more than 80%, and component surface is smooth, and sharp corner does not have any cracking phenomena.
Description
The invention belongs to field of Austenitic stainless steel.Be applicable to and make the electrical equipment austenite magnetism-free stainless steel of parts in addition.
Cold heading magnetism-free stainless steel is a kind of stable austenitic stainless steel, and it is mainly used in the structural part or other parts of working in strong-electromagnetic field, therefore requires this steel grade that good over-all properties and high diamagnetism will be arranged.The domestic steel that is used for this field has the Shaanxi steel to grind the non-magnetic iron-base stainless steel used for cold upsetting of being studied at present, (patent publication No. CN1033293A).Though this steel has diamagnetism preferably, because of manganese too high levels in this steel constitution, the work hardening rate of steel is risen, cold-heading degenerates, and antioxidant property descends and the high deficiency of composition interalloy content.External in addition patent in this regard is also more, and as the nonmagnetic steel that the clear 62-20855 of Japan introduces, the main drawback of this steel is the increase along with deflection, and permeability obviously degenerates.The nonmagnetic steel of clear 55-28366 report is arranged again, though mechanical property is suitable with steel of the present invention, magnetic property is relatively poor.What the clear 54-127823 of Japan also introduced is one piece of duplex stainless steel, and this steel does not require magnetic property, so this class steel does not belong to steel class of the present invention.
The object of the invention provides a kind of single-phase austenitic, has good mechanics, the magnetism-free stainless steel of magnetic and processing characteristics.
For solving purpose of the present invention, the concrete Chemical Composition of our designed magnetism-free stainless steels is (weight %) C≤0.08%; Si≤1.5%; Mn1.0～2.0%; Cr 13.2～14.95%; Ni 12.0～13.9%; Cu 2.5～3.5%; P≤0.025%; S≤0.015%; Re 0.005～0.05%, and all the other are iron.
According to concrete element interaction in the designed non-magnetic rustproof steel constitution of the object of the invention, be described in detail as follows.In steel of the present invention, C is fused to the element that matrix plays strengthening effect, suitably improves C content, can make austenite more stable mutually, also can suppress to process simultaneously the formation of bringing out martensitic phase.But along with the raising of C content, deformability reduces, and resistance to deformation improves, and solidity to corrosion obviously degenerates, so this steel requires C≤0.08%.Silicon is the deoxidation residual element, and it is favourable to deep deoxidation to improve Si content, can reduce the harm of oxygen to this steel cold heading performance.Si can strengthen matrix, improves steel resistance of oxidation at high temperature, but Si content surpasses at 1.5% o'clock, easily forms ferrite, and the permeability of steel is obviously risen, and this is that the present invention must overcome, thus in steel of the present invention the Si content requirement≤1.5%.Mn has the effect of deoxidization desulfuration in steel of the present invention, also has Mn can suppress ferritic formation simultaneously, makes austenite more stable mutually, and Mn increases the melting degree of N in the steel, and it is very favourable that inhibition processing is induced martensite.When Cr content was higher, Mn can suppress the formation of delta ferrite again, and can eliminate because of adding the thermal crack phenomenon that copper causes.But evidence, when Mn content surpassed 2%, work hardening rate rose, and cold heading performance increases with Mn content and obviously degenerates, and the antioxidant property of steel descends.Therefore Mn content is 1.0～2.0% in the steel of the present invention.Cr guarantees stainless, the anti-corrosion principal element of this magnetism-free stainless steel in steel of the present invention, and Cr can make matrix purifying and atmospheric corrosion resistance, and Cr content should be 13.2～14.9% for this reason.If Cr content is low excessively, then act on not obvious.But the Cr too high levels then easily generates ferrite, and permeability is improved, overcome this influence, then must improve austenite former, as Ni, Mn, C, Cu etc., to cause the alloy content of steel to raise like this, the cost of steel increases, so Cr content should not surpass 15%.Ni be stable austenite mutually and suppress processing and induce martensitic element, for the cold-heading that improves steel with prevent that generation from bringing out martensite, Ni content should be controlled at 12.0～13.9%.Can improve the solidity to corrosion of steel like this and improve the cold and hot working of steel.In steel of the present invention, add the deoxidization desulfuration effect that rare earth element can improve steel, improve the degree of cleaning of steel, improve processing characteristics, improve the solidity to corrosion of steel, but excessive rare earth then can produce re inclusion, thereby influence the quality of steel.So total amount of rare earth Re 0.005～0.05%.
The smelting process of steel of the present invention is to adopt vacuum induction furnace smelting, or adopts medium-frequency induction furnace to add electroslag, and remelting process is smelted.The hot-workability of this steel grade is good, and the steel ingot cogging Heating temperature is 1100 ℃～1150 ℃, and whole rammer temperature should be greater than 900 ℃.The reply material carries out pickling and scale removal after cold rolling, cold-drawn, and the deflection during cold working can be set according to material specification.
It is stable that magnetism-free stainless steel of the present invention has the matrix of steel compared with prior art, is single-phase austenite, and through adding post-construction deformation 20%～80%, it is organized and still is single-phase austenite.The cold and hot working performance is good, and hardening coefficient is low, and the cold-heading deformation rate reaches more than 80%, and parts surface is smooth in addition, and sharp corner does not have any cracking phenomena yet, has overcome magnetism-free stainless steel and has brought deficiencies such as processing difficulties because of Mn content is high, and its permeability is low and stable.
Embodiment
Magnetism-free stainless steel of the present invention has been smelted four stove steel by above-mentioned composition scope, and its concrete Chemical Composition sees Table 1.Smelting is carried out in the 200kg vacuum induction furnace.The steel ingot cogging Heating temperature is 1130 ℃, and final forging temperature is 950 ℃.And then through rolling, operations such as solution treatment, pickling scale removal, cold-drawn.The mechanical property of steel of the present invention sees Table 2.Magnetic property sees Table 3.
Table 3 steel magnetic property of the present invention table
Claims (1)
1, a kind of single-phase austenite magnetism-free stainless steel is characterized in that the concrete Chemical Composition of this steel is (weight %): C≤0.08%; Si≤1.5%; Mn1.0～2.0%; Cr13.2～14.95%; Ni12.0～13.9%; Cu2.5～3.5%; P≤0.025%; S≤0.015%; Re0.005～0.05%, all the other are Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107850 CN1015002B (en) | 1990-09-24 | 1990-09-24 | Magnetism-free stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107850 CN1015002B (en) | 1990-09-24 | 1990-09-24 | Magnetism-free stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050227A true CN1050227A (en) | 1991-03-27 |
| CN1015002B CN1015002B (en) | 1991-12-04 |
Family
ID=4880738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90107850 Expired CN1015002B (en) | 1990-09-24 | 1990-09-24 | Magnetism-free stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015002B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100577844C (en) * | 2005-04-04 | 2010-01-06 | 住友金属工业株式会社 | Austenitic stainless steel |
| CN1996690B (en) * | 2006-01-05 | 2010-07-28 | 凤凰科技集团有限公司 | An energy-saving vibration prevention hammer |
| CN101413091B (en) * | 2008-11-28 | 2010-11-17 | 江苏大学 | Novel easy-to-cut stainless steel 303B and manufacturing method thereof |
| CN101937755A (en) * | 2010-08-20 | 2011-01-05 | 白城电力镇赉变压器有限责任公司 | Mine flame-proof type dry transformer and mobile substation flameproof shell |
| CN101298649B (en) * | 2007-05-06 | 2011-07-13 | 大同特殊钢株式会社 | High-strength nonmagnetic stainless steel, component containing the same and manufacturing method thereof |
| CN105026594A (en) * | 2013-02-28 | 2015-11-04 | 日新制钢株式会社 | Austenitic stainless-steel sheet and process for producing high-elastic-limit nonmagnetic steel material therefrom |
| CN107838414A (en) * | 2017-10-20 | 2018-03-27 | 福州市富恒新材料有限公司 | A kind of high convergency non-magnetic rustproof powdered steel and its manufacture method |
-
1990
- 1990-09-24 CN CN 90107850 patent/CN1015002B/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100577844C (en) * | 2005-04-04 | 2010-01-06 | 住友金属工业株式会社 | Austenitic stainless steel |
| CN1996690B (en) * | 2006-01-05 | 2010-07-28 | 凤凰科技集团有限公司 | An energy-saving vibration prevention hammer |
| CN101298649B (en) * | 2007-05-06 | 2011-07-13 | 大同特殊钢株式会社 | High-strength nonmagnetic stainless steel, component containing the same and manufacturing method thereof |
| CN101413091B (en) * | 2008-11-28 | 2010-11-17 | 江苏大学 | Novel easy-to-cut stainless steel 303B and manufacturing method thereof |
| CN101937755A (en) * | 2010-08-20 | 2011-01-05 | 白城电力镇赉变压器有限责任公司 | Mine flame-proof type dry transformer and mobile substation flameproof shell |
| CN105026594A (en) * | 2013-02-28 | 2015-11-04 | 日新制钢株式会社 | Austenitic stainless-steel sheet and process for producing high-elastic-limit nonmagnetic steel material therefrom |
| CN108754333A (en) * | 2013-02-28 | 2018-11-06 | 日新制钢株式会社 | Austenite stainless steel plate and the manufacturing method for using its non magnetic steel of high elastic limit |
| CN108754333B (en) * | 2013-02-28 | 2021-02-09 | 日铁不锈钢株式会社 | Austenitic stainless steel sheet and method for producing high-elastic-limit nonmagnetic steel material using same |
| CN107838414A (en) * | 2017-10-20 | 2018-03-27 | 福州市富恒新材料有限公司 | A kind of high convergency non-magnetic rustproof powdered steel and its manufacture method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1015002B (en) | 1991-12-04 |
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