CN103667900B - A kind of preparation method of high-magnetic-strengelectrical electrical steel for automobile motor - Google Patents
A kind of preparation method of high-magnetic-strengelectrical electrical steel for automobile motor Download PDFInfo
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- CN103667900B CN103667900B CN201310615069.0A CN201310615069A CN103667900B CN 103667900 B CN103667900 B CN 103667900B CN 201310615069 A CN201310615069 A CN 201310615069A CN 103667900 B CN103667900 B CN 103667900B
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Abstract
The invention discloses a kind of preparation method of high-magnetic-strengelectrical electrical steel for automobile motor, does is each chemical composition mass percent of this electrical steel: C 0.02-0.04, Si 1.2-2.4, Mn 0.5-1.5, Ni 0.3-0.6, Als 0.01-0.03, Zn 0.04-0.08, Ti 0.02-0.05, Sn 0.03-0.07, Li 0.01-0.03, Bi 0.005-0.015, Ce 0.02-0.03, Er 0.01-0.02, P≤0.015, S ≤ 0.005, surplus is iron and inevitable impurity.The present invention with the addition of the elements such as appropriate Sn, Bi, Ce, Er, can purify steel inclusion, thus reduces heat treatment process temperature, reduces iron loss; Simultaneously the present invention, with the secondary cold-rolling method of process annealing, can improve the weave construction of steel plate, improves recrystallize rate, reduces grain-size and evenly, thus improves finished product magnetic.
Description
Technical field
The present invention relates to a kind of preparation method of high-magnetic-strengelectrical electrical steel for automobile motor, belong to metal material processing and field shaping technique.
Background technology
Along with developing rapidly and the high frequency future development of electric motor of automobile of Domestic Automotive Industry, require more and more higher to the over-all properties of the electrical steel that electric machine iron core uses, not only require that there is good intensity, toughness and processing characteristics, also need that there is high magnetic strength and low iron loss.Current domestic common electrical steel, when being rolled, due to the unstable of performance and the unreasonable of technique, is difficult to obtain high magnetic strength.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of high-magnetic-strengelectrical electrical steel for automobile motor, improve the magnetic induction density of electrical steel, reduce its iron loss.
For achieving the above object, the technical solution used in the present invention is as follows:
A preparation method for high-magnetic-strengelectrical electrical steel for automobile motor, comprises the following steps:
(1) smelt according to clean steel process, controlling molten steel finalization Ingredient percent is: C0.02-0.04, Si1.2-2.4, Mn0.5-1.5, Ni0.3-0.6, Als0.01-0.03, Zn0.04-0.08, Ti0.02-0.05, Sn0.03-0.07, Li0.01-0.03, Bi0.005-0.015, Ce0.02-0.03, Er0.01-0.02, P≤0.015, S≤0.005, surplus is iron and inevitable impurity, and continuous casting becomes thickness to be the slab of 200-250mm;
(2) continuous casting steel billet is warming up to 240-280 DEG C with 120-160 DEG C/h, insulation 5-10h, 520-560 DEG C is warming up to again with 140-180 DEG C/h, insulation 3-5h, 780-840 DEG C is warming up to again with 100-150 DEG C/h, insulation 2-3h, then 330-360 DEG C is cooled to 200-250 DEG C/h, insulation 4-6h, then be warming up to 720-760 DEG C with 150-200 DEG C/h, insulation 3-4h, 1080-1160 DEG C is warming up to again with 140-180 DEG C/h, insulation 2-3h, then carries out continuous roughing, becomes thickness to be the roughing plate of 20-25mm through 4-6 passes;
(3) less than 50 DEG C are cooled to by putting into 0-5 DEG C of icy salt solution after the removing surface of roughing plate, then 320-360 DEG C is warming up to 150-200 DEG C/h, insulation 4-8h, 640-680 DEG C is warming up to again with 120-160 DEG C/h, insulation 3-4h, 810-850 DEG C is warming up to again with 80-120 DEG C/h, insulation 2-3h, then 520-560 DEG C is cooled to 100-150 DEG C/h, insulation 4-5h, then be warming up to 960-990 DEG C with 180-240 DEG C/h, insulation 1-2h, then carry out continuous finish rolling, become thickness to be the finish rolling plate of 5-10mm through 2-4 passes;
(4) it is cold rolling to carry out first time after finish rolling plate surface acid-washing, and being cold-rolled to thickness is at 75%H after 2-4mm
2+ 25%N
2380-440 DEG C is warming up to 160-220 DEG C/h under protective atmosphere, insulation 4-6h, 710-740 DEG C is warming up to again with 120-180 DEG C/h, insulation 2-3h, then 520-560 DEG C is cooled to 100-150 DEG C/h, insulation 3-5h, 830-870 DEG C is warming up to again with 150-200 DEG C/h, insulation 2-3h, then 430-460 DEG C is cooled to 160-220 DEG C/h, insulation 3-5h, 680-720 DEG C is warming up to again with 110-140 DEG C/h, insulation 2-3h, then 220-250 DEG C is cooled to 200-250 DEG C/h, insulation 5-8h, air cooling is to room temperature, then second time is carried out cold rolling, being cold-rolled to final thickness of slab is 0.2-0.3mm, again at 20%H
2+ 80%N
2330-360 DEG C is warming up to 150-200 DEG C/h under protective atmosphere, insulation 4-7h, 550-590 DEG C is warming up to again with 120-160 DEG C/h, insulation 3-4h, be warming up to 750-780 DEG C with 80-120 DEG C/h again, insulation 2-3h, is then cooled to 480-520 DEG C with 100-150 DEG C/h, insulation 4-5h, be warming up to 880-940 DEG C with 150-200 DEG C/h again, insulation 2-3h, is then cooled to 440-480 DEG C with 180-240 DEG C/h, insulation 3-6h, be cooled to 180-240 DEG C with 100-150 DEG C/h again, insulation 5-10h, air cooling is to room temperature, coating, finishing gets product.
Beneficial effect of the present invention:
The present invention with the addition of the elements such as appropriate Sn, Bi, Ce, Er, can purify steel inclusion, thus reduces heat treatment process temperature, reduces iron loss; Simultaneously the present invention, with the secondary cold-rolling method of process annealing, can improve the weave construction of steel plate, improves recrystallize rate, reduces grain-size and evenly, thus improves finished product magnetic.The electrical steel that the present invention obtains has the features such as magnetic strength is high, iron loss is low, intensity is high, good toughness, good processability, meets the performance requriements of electrical steel for automobile motor completely.
Embodiment
A preparation method for high-magnetic-strengelectrical electrical steel for automobile motor, comprises the following steps:
(1) smelt according to clean steel process, controlling molten steel finalization Ingredient percent is: C0.02-0.04, Si1.2-2.4, Mn0.5-1.5, Ni0.3-0.6, Als0.01-0.03, Zn0.04-0.08, Ti0.02-0.05, Sn0.03-0.07, Li0.01-0.03, Bi0.005-0.015, Ce0.02-0.03, Er0.01-0.02, P≤0.015, S≤0.005, surplus is iron and inevitable impurity, and continuous casting becomes thickness to be the slab of 250mm;
(2) continuous casting steel billet is warming up to 260 DEG C with 140 DEG C/h, insulation 8h, then is warming up to 540 DEG C with 160 DEG C/h, insulation 4h, then be warming up to 820 DEG C with 120 DEG C/h, insulation 2h, then 340 DEG C are cooled to 220 DEG C/h, insulation 5h, then be warming up to 740 DEG C with 180 DEG C/h, insulation 3h, 1120 DEG C are warming up to again with 160 DEG C/h, insulation 2h, then carries out continuous roughing, becomes thickness to be the roughing plate of 25mm through 5 passes;
(3) being cooled to less than 50 DEG C by putting into 1 DEG C of icy salt solution after the removing surface of roughing plate, being then warming up to 330 DEG C with 180 DEG C/h, insulation 7h, 660 DEG C are warming up to again with 150 DEG C/h, insulation 4h, then be warming up to 820 DEG C with 100 DEG C/h, insulation 3h, then 540 DEG C are cooled to 120 DEG C/h, insulation 5h, then be warming up to 970 DEG C with 220 DEG C/h, insulation 2h, then carry out continuous finish rolling, become thickness to be the finish rolling plate of 6mm through 4 passes;
(4) it is cold rolling to carry out first time after finish rolling plate surface acid-washing, and being cold-rolled to thickness is at 75%H after 3mm
2+ 25%N
2be warming up to 410 DEG C with 190 DEG C/h under protective atmosphere, insulation 5h, then be warming up to 720 DEG C with 160 DEG C/h; insulation 3h, is then cooled to 540 DEG C with 120 DEG C/h, insulation 4h; be warming up to 850 DEG C with 180 DEG C/h again, insulation 3h, is then cooled to 440 DEG C with 200 DEG C/h; insulation 5h, then be warming up to 710 DEG C with 130 DEG C/h, insulation 2h; then be cooled to 230 DEG C with 240 DEG C/h, insulation 6h, air cooling is to room temperature; then carry out second time cold rolling, being cold-rolled to final thickness of slab is 0.25mm, then at 20%H
2+ 80%N
2be warming up to 340 DEG C with 180 DEG C/h under protective atmosphere, insulation 6h, then be warming up to 570 DEG C with 140 DEG C/h; insulation 4h, then be warming up to 760 DEG C with 100 DEG C/h, insulation 3h; then be cooled to 490 DEG C with 150 DEG C/h, insulation 5h, then be warming up to 920 DEG C with 180 DEG C/h; insulation 2h, is then cooled to 460 DEG C with 220 DEG C/h, insulation 4h; be cooled to 220 DEG C with 120 DEG C/h again, insulation 8h, air cooling is to room temperature; coating, finishing gets product.
Through inspection, chemical composition is: C0.033%, Si1.87%, Mn0.92%, Ni0.36%, Als0.022%, Zn0.057%, Ti0.034%, Sn0.046%, Li0.013%, Bi0.0084%, Ce0.027%, Er0.015%, P0.0078%, S0.0032%, surplus is iron and inevitable impurity, its mechanical property is: tensile strength 603MPa, yield strength 478MPa, elongation 29.6%; Magnetic performance is: B
50=1.84T, P
15/50=2.79W/kg.
Claims (1)
1. a preparation method for high-magnetic-strengelectrical electrical steel for automobile motor, is characterized in that comprising the following steps:
(1) smelt according to clean steel process, controlling molten steel finalization Ingredient percent is: C0.02-0.04, Si1.2-2.4, Mn0.5-1.5, Ni0.3-0.6, Als0.01-0.03, Zn0.04-0.08, Ti0.02-0.05, Sn0.03-0.07, Li0.01-0.03, Bi0.005-0.015, Ce0.02-0.03, Er0.01-0.02, P≤0.015, S≤0.005, surplus is iron and inevitable impurity, and continuous casting becomes thickness to be the slab of 200-250mm;
(2) continuous casting steel billet is warming up to 240-280 DEG C with 120-160 DEG C/h, insulation 5-10h, 520-560 DEG C is warming up to again with 140-180 DEG C/h, insulation 3-5h, 780-840 DEG C is warming up to again with 100-150 DEG C/h, insulation 2-3h, then 330-360 DEG C is cooled to 200-250 DEG C/h, insulation 4-6h, then be warming up to 720-760 DEG C with 150-200 DEG C/h, insulation 3-4h, 1080-1160 DEG C is warming up to again with 140-180 DEG C/h, insulation 2-3h, then carries out continuous roughing, becomes thickness to be the roughing plate of 20-25mm through 4-6 passes;
(3) less than 50 DEG C are cooled to by putting into 0-5 DEG C of icy salt solution after the removing surface of roughing plate, then 320-360 DEG C is warming up to 150-200 DEG C/h, insulation 4-8h, 640-680 DEG C is warming up to again with 120-160 DEG C/h, insulation 3-4h, 810-850 DEG C is warming up to again with 80-120 DEG C/h, insulation 2-3h, then 520-560 DEG C is cooled to 100-150 DEG C/h, insulation 4-5h, then be warming up to 960-990 DEG C with 180-240 DEG C/h, insulation 1-2h, then carry out continuous finish rolling, become thickness to be the finish rolling plate of 5-10mm through 2-4 passes;
(4) it is cold rolling to carry out first time after finish rolling plate surface acid-washing, and being cold-rolled to thickness is at 75%H after 2-4mm
2+ 25%N
2380-440 DEG C is warming up to 160-220 DEG C/h under protective atmosphere, insulation 4-6h, 710-740 DEG C is warming up to again with 120-180 DEG C/h, insulation 2-3h, then 520-560 DEG C is cooled to 100-150 DEG C/h, insulation 3-5h, 830-870 DEG C is warming up to again with 150-200 DEG C/h, insulation 2-3h, then 430-460 DEG C is cooled to 160-220 DEG C/h, insulation 3-5h, 680-720 DEG C is warming up to again with 110-140 DEG C/h, insulation 2-3h, then 220-250 DEG C is cooled to 200-250 DEG C/h, insulation 5-8h, air cooling is to room temperature, then second time is carried out cold rolling, being cold-rolled to final thickness of slab is 0.2-0.3mm, again at 20%H
2+ 80%N
2330-360 DEG C is warming up to 150-200 DEG C/h under protective atmosphere, insulation 4-7h, 550-590 DEG C is warming up to again with 120-160 DEG C/h, insulation 3-4h, be warming up to 750-780 DEG C with 80-120 DEG C/h again, insulation 2-3h, is then cooled to 480-520 DEG C with 100-150 DEG C/h, insulation 4-5h, be warming up to 880-940 DEG C with 150-200 DEG C/h again, insulation 2-3h, is then cooled to 440-480 DEG C with 180-240 DEG C/h, insulation 3-6h, be cooled to 180-240 DEG C with 100-150 DEG C/h again, insulation 5-10h, air cooling is to room temperature, coating, finishing gets product.
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| CN201310615069.0A CN103667900B (en) | 2013-11-28 | 2013-11-28 | A kind of preparation method of high-magnetic-strengelectrical electrical steel for automobile motor |
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| CN201310615069.0A CN103667900B (en) | 2013-11-28 | 2013-11-28 | A kind of preparation method of high-magnetic-strengelectrical electrical steel for automobile motor |
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| CN103667900B true CN103667900B (en) | 2016-01-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188970A (en) * | 1996-10-21 | 1998-07-29 | 川崎制铁株式会社 | Grain-oriented electromagnetic steel sheet and process for producing the same |
| CN101346484A (en) * | 2005-12-27 | 2009-01-14 | Posco株式会社 | Non-oriented electrical steel sheets with improved magnetic property and method for manufacturing the same |
| CN102367547A (en) * | 2011-10-31 | 2012-03-07 | 山西太钢不锈钢股份有限公司 | Manufacture method of high-silicon aluminum content non-oriented silicon steel strip |
| CN102676914A (en) * | 2012-05-09 | 2012-09-19 | 首钢总公司 | Cold-rolled non-oriented electric steel and preparation method thereof |
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- 2013-11-28 CN CN201310615069.0A patent/CN103667900B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188970A (en) * | 1996-10-21 | 1998-07-29 | 川崎制铁株式会社 | Grain-oriented electromagnetic steel sheet and process for producing the same |
| CN101346484A (en) * | 2005-12-27 | 2009-01-14 | Posco株式会社 | Non-oriented electrical steel sheets with improved magnetic property and method for manufacturing the same |
| CN102367547A (en) * | 2011-10-31 | 2012-03-07 | 山西太钢不锈钢股份有限公司 | Manufacture method of high-silicon aluminum content non-oriented silicon steel strip |
| CN102676914A (en) * | 2012-05-09 | 2012-09-19 | 首钢总公司 | Cold-rolled non-oriented electric steel and preparation method thereof |
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