CN100467658C - Non-magnetic high-strength stainless steel material and method for manufacturing the same - Google Patents
Non-magnetic high-strength stainless steel material and method for manufacturing the same Download PDFInfo
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- CN100467658C CN100467658C CNB2006101455989A CN200610145598A CN100467658C CN 100467658 C CN100467658 C CN 100467658C CN B2006101455989 A CNB2006101455989 A CN B2006101455989A CN 200610145598 A CN200610145598 A CN 200610145598A CN 100467658 C CN100467658 C CN 100467658C
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Abstract
The present invention provides a non-magnetic high-intensity stainless steel material and the process, with a weight percentage of components as follows: C less than or equal to 0.08 percent, Mn less than or equal to 0.08 percent, Ni 25.0-27.0 percent, Cr 16.0-18.0 percent, Ti 2.5-3.5 percent, Al 0.20-0.35 percent, V 0.30-0.50 percent and the remainder is Fe. The stainless steel material can be made into bar, thread and strip products with wearing resistance, high intensity and non-magnetism characteristics after a heat treatment. The material intensity sigma b is more than or equal to 1150MPa, sigma 0.2 is more than or equal to 900 MPa and hardness Hv is more than or equal to 330. The magnetoconductivity Mu 100 is less than or equal to 1.006 Gs/Oe and Br is less than or equal to 0.02T. The corrosion speed in the 3.5 percent NaCl solution is less than or equal to 0.02mm per year and the corrosion speed in the 5 percent H2SO4 solution is less than or equal to 0.04mm per year. The present invention can be used to make structure pieces, top shells, the internal and external frames and so forth in a plurality of fields.
Description
Technical field
The present invention relates to a kind of nonmagnetic, high-strength stainless steel material and manufacture method thereof.
Background technology
The magnetic recording system of aircraft such as satellite has adopted brush DC slotless bimoment motor and brushless slotless direct-current machine.The motor shaft of this motor and overcoat all need a kind of high strength not have the non-magnetic rustproof steel of hairline.Traditional magnetism-free stainless steel such as 0Cr16Ni14,0Cr18Ni9 etc. are widely used in the electron tube.Wherein 0Cr16Ni14 is mainly used in the no magnetic hardware in the electron-beam tube.This material permeability is low, μ
100≤ 1.005Gs/Oe, remanent magnetism B
R1000≤ 10.15Gs, and have good rustless property (forges material tensile strength only 600～700MPa) but intensity is low; 0Cr18Ni9 is a kind of typical stainless material, and its rustless property and hairline aspect can both satisfy the requirement of satellite magnetic recorder with motor, but intensity not high equally (about the about 520MPa of tensile strength); And the higher carbon steel materials such as 35Mn of intensity have higher magnetic usually, can't satisfy the requirement of motor works better.
Summary of the invention
Purpose of the present invention is exactly to prepare a kind of nonmagnetic, high-intensity stainless steel type material by design of alloy and necessary metallurgical means, to satisfy under some specified conditions such as satellite the special service requirements to material.
For realizing purpose of the present invention, adopted following technical scheme:
Composition (wt%) is C≤0.08%, Si≤0.8%, and Mn≤0.8%, Ni 25.0～27.0%, Cr 16.0～18%, and Ti 2.5～3.5%, and Al 0.20～0.35%, V 0.30～0.50%, and the alloy of surplus Fe adopts vacuum induction furnace+electric slag refusion and smelting mode to make alloy.
ESR ingot is pressed desired specification, forge hot finished product bar through 1100～1200 ℃ of heating.
For the silk material, ESR ingot is heated to 1100～1200 ℃, forge hot becomes square billet, is rolled into wire rod through 1100～1150 ℃ again; Wire rod is carried out 1050 ℃ solution treatment, and carry out shrend, wire rod carries out surface treatment after the shrend, again it is cold drawing to desired size, carries out the centre solution treatment under 1000～1100 ℃, and last deflection with 30～75% is cold drawing to a material.
For band, ESR ingot is heated to 1120～1200 ℃, is thermally processed into the cold belt base; After 1050 ℃ of solution treatment and shrend, be cold-rolled to desired thickness, cut edge after 1050 ℃ of continuous annealing furnace thermal treatments, be cold-rolled to required specification through 50～75% draft then.
In order to obtain uniform formation and high strength, finished product bar, silk material or band need carry out solution treatment and timeliness thermal treatment, this material heat treatment system: 850 ℃～950 ℃ solution treatment, shrend is carried out 750～800 ℃ again, timeliness thermal treatment in 1.5～2.5 hours.
The existing stainless solidity to corrosion of material through technique scheme is made has obtained high strength and nonmagnetic energy again, wherein the intensity of material: tensile strength sigma simultaneously
b〉=1150MPa, yield strength σ
0.2〉=900MPa, Vickers' hardness H
V〉=330; Magnetic property: magnetic permeability mu
100≤ 1.006Gs/Oe, Br≤0.02T; Corrosion resistance nature: alloy corrosion speed≤0.02mm/ under the 3.5%NaCl solution environmental, alloy corrosion speed≤0.04mm/ under the 5%H2SO4 solution environmental.
Contribution of the present invention is: should reach for satisfying steel grade that high intensity level realizes not having magnetic again, stainless no hairline characteristic, by rational steel grade chemical ingredients, give full play to the effect of each alloying element, adopt vacuum induction furnace+electroslag remelting process, produce a kind of the do not have high strength of magnetic, the stainless material of no hairline.
The technical requirements that motor shaft that this materials processing is made and overcoat can satisfy satellite magnetic recording system drive-motor.This material also can be applicable to make free gyroscope housing, internal and external frame etc. on the space shuttle simultaneously, and particularly its no magnetic, high-strength and corrosion resistance characteristic can be widely used in fields such as Aeronautics and Astronautics and navigation.
Further specify technical scheme of the present invention below by embodiment.
Embodiment 1:
Composition (wt%) is C 0.04%, and Si 0.44%, and Mn 0.27%, and Ni 26.95%, and Cr 16.08%, and Ti 2.32%, and Al 0.23%, and V 0.48%, the alloy of surplus Fe.In vacuum induction furnace, smelt, casting φ 80mm rod, being welded into length is the 2400mm electrode, carries out esr again, and ESR ingot is through 1180 ℃ of heating, and forge hot becomes 60 * 60mm square billet, after the figuring of surface, becomes φ 50mm finished product bar through 1150 ℃ of forge hots.The material heat treatment system: 850 ℃ * 1h solution treatment, and carry out shrend, carry out 750 ℃ again, timeliness thermal treatment in 2.5 hours.Can obtain tensile strength sigma
b1180MPa, yield strength σ
0.2925MPa, Vickers' hardness H
V380, magnetic property: magnetic permeability mu
1001.0058Gs/Oe, Br0.02T; Corrosion resistance nature: alloy corrosion speed is 0.0119mm/ under the 3.5%NaCl solution environmental, and alloy corrosion speed is the Stainless Steel Alloy bar of the no hairline of 0.0374mm/ under the 5%H2SO4 solution environmental.
Embodiment 2:
Composition (wt%) is C 0.07%, and Si 0.49%, and Mn 0.47%, and Ni 26.05%, and Cr 16.88%, Ti 2.78%, and Al 0.29%, and V 0.37%, the alloy of surplus Fe, smelt in vacuum induction furnace, casting φ 80mm rod is welded into the 2400mm electrode, carries out esr again; Through 1100～1200 ℃ of heating, forge hot becomes 90 * 90mm square billet then, and reconditioning is rolled into φ 14mm wire rod through 1100～1150 ℃ again after 1100～1150 ℃ of heating are rolled into 40 * 40mm square billet; Wire rod carried out 1050 ℃ solution treatment; and carry out shrend; wire rod carries out cleanup acid treatment after the shrend; again it is cold drawing to φ 9mm, under 1050 ℃ * 1h, heat-treats, be cold drawing to φ 7mm after the pickling again; the following 1050 ℃ * 1h of protective atmosphere thermal treatment; be cold drawing to φ 5mm, the following 1050 ℃ * 1h of protective atmosphere thermal treatment is cold drawing to φ 3.5mm finished silk material.Silk material heat treating regime: 900 ℃ * 1h solution treatment, timeliness thermal treatment in 780 ℃ * 2.5 hours.Can obtain tensile strength sigma
b1200MPa, yield strength σ
0.21100MPa, Vickers' hardness H
V360; Magnetic property: magnetic permeability mu
1001.0049Gs/Oe, Br0.02T; Corrosion resistance nature: alloy corrosion speed is 0.0110mm/ under the 3.5%NaCl solution environmental, and alloy corrosion speed is the Stainless Steel Alloy silk material of the no hairline of 0.0385mm/ under the 5%H2SO4 solution environmental.
Embodiment 3:
Composition (wt%) is C 0.04%, and Si 0.42%, and Mn 0.447%, Ni 26.28%, and Cr 17.25%, and Ti 2.98%, Al 0.26%, V0.35%, the alloy of surplus Fe, smelt in vacuum induction furnace, casting φ 80mm rod is welded into the 2400mm electrode, carry out esr again, ESR ingot is heated to 1120～1200 ℃, forge hot becomes 40 * 150～200mm slab, and reconditioning is after 1100～1150 ℃ of heating are rolled into 4.5 * 150～200mm mm cold belt base; Through cold rolling loose after the monolithic clot, straight processing after 1050 ℃ of solution treatment and the shrend, carry out again welding rolling after pickling, the reconditioning, cold rolling one-tenth 1.5mm is thick, cut edge after the thermal treatment of 1050 ℃ * 4m/min continuous annealing furnace, it is thick to be cold-rolled to 0.7mm, again through the thermal treatment of 1050 ℃ * 5m/min continuous annealing furnace, and the cold rolling 0.30mm finished product of 10 rollers.The material heat treatment system: 950 ℃ * 1h solution treatment, and carry out shrend, carry out 900 ℃ again, timeliness thermal treatment in 1.5 hours.Can obtain tensile strength sigma
b1270MPa, yield strength σ
0.21070MPa, Vickers' hardness H
V370, magnetic property: magnetic permeability mu
1001.0046Gs/Oe, Br0.01T; Corrosion resistance nature: alloy corrosion speed is 0.0109mm/ under the 3.5%NaCl solution environmental, and alloy corrosion speed is the Stainless Steel Alloy band of no hairline of Stainless Steel Alloy bar of the no hairline of 0.0375mm/ under the 5%H2SO4 solution environmental.
Claims (4)
1. nonmagnetic, high-strength stainless steel material is characterized in that: chemical ingredients (wt%) is C≤0.08%, Si≤0.8%, Mn≤0.8%, Ni 25.0～27.0%, and Cr 16.0～18%, and Ti 2.5～3.5%, Al 0.20～0.35%, V0.30～0.50%, surplus Fe.
2. the method for the bar of nonmagnetic according to claim 1, the high-strength stainless steel material of a manufacturing, it is characterized in that: adopt the smelting mode that adds the electroslag remelting in the vacuum induction furnace, ESR ingot is through 1100～1200 ℃ of heating, by desired specification, through forge hot finished product bar, finished product bar heat treating regime is: 850 ℃～950 ℃ solution treatment, and carry out shrend, carry out 750～800 ℃ again, timeliness thermal treatment in 1.5～2.5 hours.
3. a manufacturing is nonmagnetic according to claim 1, the method of the silk material of high-strength stainless steel material, it is characterized in that: adopt the smelting mode that adds the electroslag remelting in the vacuum induction furnace, ESR ingot is through 1100～1200 ℃ of heating, hammer cogging, be rolled into wire rod through 1100～1150 ℃ again, wire rod carried out 1050 ℃ solution treatment, and carry out shrend, wire rod carries out surface treatment after the shrend, again it is cold drawing to desired size, under 1000～1100 ℃, carry out the centre solution treatment, last deflection with 30～75% is cold drawing to the finished silk material, and finished silk material heat treating regime is: 850 ℃～950 ℃ solution treatment, and carry out shrend, carry out 750～800 ℃ again, timeliness thermal treatment in 1.5～2.5 hours.
4. a manufacturing is nonmagnetic according to claim 1, the method of the band of high-strength stainless steel material, it is characterized in that: adopt the smelting mode that adds the electroslag remelting in the vacuum induction furnace, ESR ingot is heated to 1100～1200 ℃, be thermally processed into the cold belt base, through 1050 ℃ of solution treatment and shrend, be cold-rolled to desired thickness, cut edge after 1050 ℃ of continuous annealing furnace thermal treatments, be cold-rolled to required specification through 50～75% draft then, finished product band heat treating regime is: 850 ℃～950 ℃ solution treatment, and carry out shrend, carry out 750～800 ℃ again, timeliness thermal treatment in 1.5～2.5 hours.
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| CN102199735B (en) * | 2011-04-29 | 2013-04-03 | 刘彦辉 | Metal silk screen used for printing |
| CN103372756B (en) * | 2012-04-23 | 2016-08-03 | 上海申江锻造有限公司 | A kind of manufacture method of low carbon austenite non-magnetic steel motor support drum forging |
| CN102719642A (en) * | 2012-06-21 | 2012-10-10 | 中国科学院金属研究所 | Production process of high-strength high-toughness GH2132 rod/wire material |
| CN103600041B (en) * | 2013-11-18 | 2015-09-30 | 乐山力盾铸钢有限公司 | The casting method of the hard nonmagnetic steel of resistance to marine corrosion of a kind of high-strength height |
| CN104002105B (en) * | 2014-06-06 | 2016-05-04 | 无锡市神力齿轮冷挤有限公司 | Without magnetic planet axis processing technology |
| CN105018703A (en) * | 2015-07-28 | 2015-11-04 | 苏州市鑫渭阀门有限公司 | Solution treatment technology for high-pressure stainless steel pump |
| CN105463340A (en) * | 2015-11-25 | 2016-04-06 | 铜陵市经纬流体科技有限公司 | High-toughness high-manganese low-nickel stainless steel pump valve casting and manufacturing method thereof |
| CN109022685A (en) * | 2017-06-12 | 2018-12-18 | 鞍钢股份有限公司 | A kind of manufacturing method of 9Ni steel plate remanent magnetism control |
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| CN110951957A (en) * | 2019-11-13 | 2020-04-03 | 江阴康瑞成型技术科技有限公司 | Non-magnetic stainless steel bar for low-permeability microelectronic product and production process thereof |
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