CN105296863A - Half-hard magnetic alloy and manufacturing method thereof - Google Patents
Half-hard magnetic alloy and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a half-hard magnetic alloy and a manufacturing method thereof. The half-hard magnetic alloy comprises the following chemical components in percentage by weight: C not more than 0.30%, Nb not more than 0.20%, 2.00-4.00% of Cr, 0.20-0.50% of Mn, 2.00-4.00% of Co, and the balance of Fe and inevitable impurities; and through the cold working deformation of not lower than 90% and proper heat treatment, the alloy can obtain the half-hard magnetic performance of the remanence Br of 0.77-1.25 T and the coercivity Hc of 960-3360 A/m. The half-hard magnetic alloy has the advantages of realizing the saving of noble resources and reducing the raw material cost and selling price of the half-hard magnetic alloy.
Description
Technical field
The invention belongs to half-hard magnetic material technical field, particularly a kind of semi-hard magnetic alloy and manufacture method thereof.
Background technology
Half-hard magnetic material is the material with certain coercive force and remanent magnetism high as far as possible and certain square ratio, its coercive force between soft magnetism and Hard Magnetic, within the scope of 800 ~ 20000A/m.Because half-hard magnetic material can carry out cold working, can be made into strip and filament material, method carries out machine-shaping stamping-out, deep-draw also can be adopted further bending etc., is thus subject to extensive concern.
Half-hard magnetic material is widely used in the aspects such as hysteresis machine rotor, blocking relay iron core, sensor, tensioner, theft protection element and electromechanical braking system.Its market large usage quantity, data display according to statistics, the whole world only antitheft magnetic stripe half-hard magnetic material demand just reaches more than 700 ton/year.The antitheft magnetic stripe output of current China accounts for the whole world more than 50%, and conservative estimation strip market demand is monthly several tons to tens tons.
Semi-hard magnetic alloy can be divided into α/γ inversion of phases (as Fe-52%Co-9%V by its magnetic hardening mechanism, Fe-52%Co-6%Ni-4%V, Fe-20%Mo-5%Ni etc.), two-phase separation type is (as Fe-15%Ni-8%Al-5%Co, Fe-30%Cr-10%Co, Fe-20%Co-13%Ni-8%Al etc.) and precipitation type (as medium carbon steel, Co-Cr steel etc.), wherein α/γ inversion of phases semi-hard magnetic alloy is due to Co, Mo, V, Ni, elements such as w content is very high, good plasticity can be obtained by reasonable component proportioning, after heat treatment can obtain excellent semi-hard magnet performance, it is the main flow of current half-hard magnetic material.But the noble elements such as this kind of semi-hard magnetic alloy Co, Mo, V, Ni, W generally containing high level, its cost and price are all higher, and serious by raw material market influence of fluctuations.To the not high field of half-hard magnetic material performance requriements as made anti-theft tag time, use traditional high Co, Mo, V, Ni, W half-hard magnetic material not only to waste material and resource, too increase manufacturing cost.
Summary of the invention
The object of the present invention is to provide a kind of semi-hard magnetic alloy and manufacture method thereof, solve the problem that noble element content is higher.
A kind of semi-hard magnetic alloy, chemical composition is by weight percentage, C≤0.30%; Nb≤0.20%; Cr:2.00 ~ 4.00%; Mn:0.20 ~ 0.50%; Co:2.00 ~ 4.00%; All the other are Fe and inevitable impurity.
A manufacture method for semi-hard magnetic alloy, concrete steps and parameter as follows:
1, alloy adopts conventional vacuum to smelt, forging, hot rolling mode be machined to wire rod or the cold belt base of desired size, and after wire rod or cold belt base are cooled to room temperature, the mode adopting pickling or pickling to add sized flap wheel reconditioning respectively removes surface scale;
2, the wire rod obtained by step 1 or cold belt base, require through one or many cold-drawn according to final dimension or cold rollingly obtain cold-drawn bar, hand-drawn wire material or cold-strip finished product, and cold-drawn or the deflection being cold-rolled to finished product are not less than 90%; Through repeatedly cold-drawn or cold rolling time, need to carry out process annealing process, annealing process is 850 DEG C × 1.5h;
3, the cold-drawn bar obtained by step 2, hand-drawn wire material or cold-strip finished product, adopt (900 ± 50 DEG C) × (1 ~ 1.5h) the come out of the stove technique of rapid cooling of rapid cooling or (500 ± 10 DEG C) × (5 ~ 8h)+(550 ± 10 DEG C) × (2 ~ 4h) of coming out of the stove to carry out finished product thermal treatment; After this process heat process, can obtain that remanent magnetism is 0.77 ~ 1.25T, coercive force is the semi-hard magnetic alloy of 960 ~ 3360A/m.
The invention has the advantages that: achieve precious resource saving and reduce material cost and the price of semi-hard magnetic alloy.
Embodiment
Embodiment 1
Chemical composition is by weight percentage: C<0.01, Mn:0.50, Cr:3.97, Co:3.37, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to Ф 12mm wire rod and after pickling, pull into Ф 3.5mm rod product through a cold-drawn, cold-drawn finished product deflection is 91.5%, at H
2the performance obtained after adopting the process of (490 DEG C × 5h)+(550 DEG C × 2h) rapid cooling of coming out of the stove process heat under atmosphere is: Br=0.83T; Hc=960A/m.
Embodiment 2:
Chemical composition is by weight percentage: C<0.01, Mn:0.50, Cr:3.97, Co:3.37, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to Ф 12mm wire rod and after pickling, pull into Ф 0.5mm silk material finished product through twice cold-drawn, cold-drawn finished product deflection is 99%, at H
2the performance obtained after adopting the process of (510 DEG C × 8h)+(540 DEG C × 4h) rapid cooling of coming out of the stove process heat under atmosphere is: Br=1.13T; Hc=1360A/m.
Embodiment 3:
Chemical composition is by weight percentage: C:0.30, Mn:0.20, Cr:2.47, Co:3.61, Nb:0.2%, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to the thick cold belt base of 5.5mm and pickling, after reconditioning, cold rollingly roll into 0.05mm band finished product through twice, cold rolling finished product deflection is 95%, at H
2850 DEG C × 1.5h the performance obtained after the process of rapid cooling process heat of coming out of the stove is adopted to be under atmosphere: Br=0.77T; Hc=3360A/m.
Embodiment 4:
Chemical composition is by weight percentage: C:0.30, Mn:0.20, Cr:2.47, Co:3.61, Nb:0.2, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to Ф 13.5mm wire rod and after pickling, pull into Ф 3.5mm rod product through a cold-drawn, drawing deformation amount is 93.3%, at H
2950 DEG C × 1.5h the performance obtained after the process of rapid cooling process heat of coming out of the stove is adopted to be under atmosphere: Br=0.84T; Hc=2320A/m.
Embodiment 5:
Chemical composition is by weight percentage: C:0.044, Mn:0.45, Cr:2.03, Co:2.01, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to Ф 13.5mm wire rod and after pickling, pull into Ф 3.5mm rod product through a cold-drawn, drawing deformation amount is 93.3%, at H
2the performance obtained after adopting the process of (510 DEG C × 8h)+(550 DEG C × 4h) rapid cooling of coming out of the stove process heat under atmosphere is: Br=1.04T; Hc=1120A/m.
Embodiment 6:
Chemical composition is by weight percentage: C:0.164, Mn:0.21, Cr:2.01, Co:3.98, Nb:0.13, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to Ф 12mm wire rod and after pickling, pull into Ф 1.0mm silk material finished product through twice cold-drawn, drawing deformation amount is 90.2%, at H
2900 DEG C × 1h the performance obtained after the process of rapid cooling process heat of coming out of the stove is adopted to be under atmosphere: Br=1.25T; Hc=1360A/m.
Embodiment 7:
Chemical composition is by weight percentage: C:0.164, Mn:0.21, Cr:2.01, Co:3.98, Nb:0.13, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to the thick cold belt base of 5.5mm and pickling, after reconditioning, roll into 0.1mm band finished product through once cold rolling, cold rolling reduction is 98.2%, at H
2900 DEG C × 1.5h the performance obtained after the process of rapid cooling process heat of coming out of the stove is adopted to be under atmosphere: Br=1.10T; Hc=1440A/m.
Embodiment 8:
Chemical composition is by weight percentage: C:0.057, Mn:0.22, Cr:2.34, Co:3.52, and all the other are Fe and inevitable impurity.Adopt vacuum induction furnace smelting, through common process forging, be hot-rolled down to Ф 12mm wire rod and after pickling, pull into Ф 3.5mm rod product through a cold-drawn, drawing deformation amount is 92.2%, at H
2the performance obtained after adopting the process of (500 DEG C × 6h)+(560 DEG C × 3h) rapid cooling of coming out of the stove process heat under atmosphere is: Br=1.13T; Hc=1120A/m.
Claims (2)
1. a semi-hard magnetic alloy, is characterized in that, chemical composition is by weight percentage, C≤0.30%; Nb≤0.20%; Cr:2.00 ~ 4.00%; Mn:0.20 ~ 0.50%; Co:2.00 ~ 4.00%; All the other are Fe and inevitable impurity.
2. a manufacture method for semi-hard magnetic alloy according to claim 1, is characterized in that, concrete steps and parameter as follows:
1) alloy adopts conventional vacuum to smelt, forging, hot rolling mode be machined to wire rod or the cold belt base of desired size, and after wire rod or cold belt base are cooled to room temperature, the mode adopting pickling or pickling to add sized flap wheel reconditioning respectively removes surface scale;
2) wire rod obtained by step 1 or cold belt base, require through cold-drawn according to final dimension or cold rollingly obtain cold-drawn bar, hand-drawn wire material or cold-strip finished product, and cold-drawn or the deflection being cold-rolled to finished product are not less than 90%; Through cold-drawn or cold rolling time, carry out process annealing process, annealing process is 850 DEG C × 1.5h;
3) the cold-drawn bar obtained by step 2, hand-drawn wire material or cold-strip finished product, adopt (900 ± 50 DEG C) × (1 ~ 1.5h) the come out of the stove technique of rapid cooling of rapid cooling or (500 ± 10 DEG C) × (5 ~ 8h)+(550 ± 10 DEG C) × (2 ~ 4h) of coming out of the stove to carry out finished product thermal treatment; After this process heat process, can obtain that remanent magnetism is 0.77 ~ 1.25T, coercive force is the semi-hard magnetic alloy of 960 ~ 3360A/m.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970100A (en) * | 2016-05-24 | 2016-09-28 | 钢铁研究总院 | High-usage-temperature high-saturation semihard magnetic alloy and preparation method thereof |
| CN108642396A (en) * | 2018-04-16 | 2018-10-12 | 浙江南德精密合金有限公司 | A kind of bias slice of high stability, its manufacturing method and with its manufactured acoustic magnetic anti-theft label |
| CN110735081A (en) * | 2019-11-05 | 2020-01-31 | 杭州科兴磁业有限公司 | Fe-Cr-Co semi-hard magnetic alloy and its preparation method |
| CN112652481A (en) * | 2020-12-15 | 2021-04-13 | 杭州科兴磁业有限公司 | Processing technology of iron-chromium-cobalt semi-hard magnetic |
| CN112795851A (en) * | 2020-12-29 | 2021-05-14 | 钢铁研究总院 | Low-cost low-alloy semi-hard magnetic alloy and preparation method thereof |
| CN113564465A (en) * | 2021-07-05 | 2021-10-29 | 北京科技大学 | Forging FeCo alloy with stretching and impact toughness and preparation method thereof |
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| CN108642396A (en) * | 2018-04-16 | 2018-10-12 | 浙江南德精密合金有限公司 | A kind of bias slice of high stability, its manufacturing method and with its manufactured acoustic magnetic anti-theft label |
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| CN112652481A (en) * | 2020-12-15 | 2021-04-13 | 杭州科兴磁业有限公司 | Processing technology of iron-chromium-cobalt semi-hard magnetic |
| CN112652481B (en) * | 2020-12-15 | 2023-04-07 | 杭州科兴磁业有限公司 | Processing technology of iron-chromium-cobalt semi-hard magnetic |
| CN112795851A (en) * | 2020-12-29 | 2021-05-14 | 钢铁研究总院 | Low-cost low-alloy semi-hard magnetic alloy and preparation method thereof |
| CN112795851B (en) * | 2020-12-29 | 2022-02-25 | 钢铁研究总院 | Low-cost low-alloy semi-hard magnetic alloy and preparation method thereof |
| CN113564465A (en) * | 2021-07-05 | 2021-10-29 | 北京科技大学 | Forging FeCo alloy with stretching and impact toughness and preparation method thereof |
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