CN100486758C - Method for manufacturing low-iron-loss cold-rolled orientation free silicon steel plate using asynchronous rolling process - Google Patents
Method for manufacturing low-iron-loss cold-rolled orientation free silicon steel plate using asynchronous rolling process Download PDFInfo
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- CN100486758C CN100486758C CNB2005100468120A CN200510046812A CN100486758C CN 100486758 C CN100486758 C CN 100486758C CN B2005100468120 A CNB2005100468120 A CN B2005100468120A CN 200510046812 A CN200510046812 A CN 200510046812A CN 100486758 C CN100486758 C CN 100486758C
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Abstract
The invention provides the method that manufactures the low iron damaged cold rolled nontropism silicon armor plate with the asynchronism steel rolling technics. Its characteristic is that it generally brings the asynchronism steel rolling fashion in the two press and prolonging working procedures of the heat rolling and the cold rolling. The axis direction rotated speed ratio of the top and the bottom rollers on the rolling machine is 1:1.05~1:1.30.The asynchronism steel rolling fashion contains the first path asynchronism rolling, the last path asynchronism rolling and the hypo-asynchronism rolling. The low iron damaged cold rolled nontropism silicon armor of the invention is calculated by the quality percent ratio as Si+Al<=4.2,C<=0.005,Mn 0.2~0.35,P<=0.02,S<=0.002,N2<=0.003,O2<=0.002 and the remains are Fe and the ineluctable impurity. The method can get the good social and economical benefits.
Description
Technical field
The invention belongs to Ferrous Metallurgy and processing technique field, promptly relate to a kind of method that adopts the low iron loss orientation free silicon steel plate of asynchronous rolling process manufacturing.
Background technology
Orientation free silicon steel plate is a material of making generator and motor iron-core, and low iron loss is its crucial performance requirement.
The manufacturing process flow of cold-rolled non-oriented silicon steel generally includes: smelting, continuous casting, hot rolling, cold rolling, anneal, be coated with master operations such as insulating barrier and winding, finished product thickness is generally 0.35,0.50 and 0.65mm.The approach that reduces the cold-rolled non-oriented silicon steel iron loss mainly contains at present: (one) reduces the content of impurity in the silicon steel, and this need improve smelting technique and update the equipment; (2) content of Si+Al in the raising silicon steel, but this can reduce magnetic conductivity, and can make the cold-forming property variation of steel; (3) improve and adjust rolling mill practice, optimize the silicon steel plate microstructure, this technological approaches is comparatively simple and easy to do, thus be subjected to the attention of professional and technical personnel and enterprise.
Nippon Steel Manufacturing Corp opens the manufacture method that discloses two kinds of non-oriented magnetic steel sheets among flat 7-207343 and the flat 8-193220 of Te Kai the spy, and its composition (percetage by weight) is: C≤0.015; Si 0.05～1.0; Mn 0.1～1.5; P≤0.15; S≤0.03; Al≤1.0; N
2≤ 0.01; O
2≤ 0.02; Surplus is Fe and unavoidable impurities.After the hot finishing,, be rolled to final thickness by the secondary cold-rolling method again through 700～1000 ℃ of annealing.For the second time cold rolling reduction ratio is 2～15%, adopts the asymmetrical rolling mode, the top and bottom rolls circumferential speed is poor 〉=and 0.5% (flat 7-207343), or top and bottom rolls diameter difference, and little roller diameter: big roller diameter≤0.8 (flat 8-193220).These two parts of data of openly speciallyying permit in the communique show: magnetic strength (B in the plate face of the cold-rolled non-oriented silicon steel made from inventive method
50) anisotropy reduces.In the manufacturing process of the orientation free silicon steel plate of higher Si+Al content, not seeing has the asymmetrical rolling of employing mode to carry out cold rolling processing.In addition, Nippon Steel Manufacturing Corp discloses " senior non-oriented electromagnetic steel sheet having hot rolled plate making process " in flat 3-138317, and composition is C≤0.008%; (Si+2Al) 1.8～5%; Mn0.02～0.5%; S≤0.0015%; N≤0.0020%; Surplus is Fe and unavoidable impurities, above-mentioned non-orientation silicon steel slab is heated to 1100～1200 ℃ carries out hot rolling.At least 1 passage adopts the asymmetrical rolling mode in the wherein hot finishing operation, and upper and lower roll circumferential speed is poor 〉=and 5%.Silicon steel plate magnetic strength (the B of this inventive method manufacturing
50) and iron loss (P
15) etc. performance improvement is all arranged.
Summary of the invention
The objective of the invention is to start with, to seek a kind of method of making low-iron-loss cold-rolled orientation free silicon steel plate from improving and adjust rolling mill practice.
Influencing on the rule basis of the deformation characteristics of having studied asynchronous rolling process and rolling parameter, the asymmetrical rolling mode is introduced comprehensively the manufacture process of orientation free silicon steel plate, promptly in hot rolling and cold-rolled process, all adopt the asymmetrical rolling mode, propose a kind of method of making low-iron-loss cold-rolled orientation free silicon steel plate with asynchronous rolling process.Asymmetrical rolling is to utilize the upper and lower working roll circumferential speed of milling train not wait and a kind of special rolled mode of forming, it has the power of rolling and moment of torsion is low and rolled sheet metal precision advantages of higher, its distinctive stranding form of rolling can make rolling sheet material produce entire body detrusion simultaneously, thereby changes tissue and the texture characteristic and the distribution thereof of sheet material.
Method with asynchronous rolling process manufacturing low-iron-loss cold-rolled orientation free silicon steel plate proposed by the invention, comprise smelting, continuous casting, hot rolling, pickling, cold rolling, anneal, be coated with insulating barrier and each operation of winding, it is characterized in that introducing in hot rolling and cold rolling two calendering procedures asymmetrical rolling mode, the circumferential speed of the upper and lower working roll of asynchronous rolling machine is than being 1:1.05～1:1.30 comprehensively.
Said comprehensive introducing asymmetrical rolling mode comprises among the present invention: first passage asymmetrical rolling, extreme trace time asymmetrical rolling and first and last two passage asymmetrical rollings.In the first and last two passage asymmetrical rollings, two passages can adopt different speed ratios.
The silicon steel composition (by weight percentage) that method of the present invention was suitable for is: Si+Al≤4.2; C≤0.005; Mn0.2～0.35; P≤0.02; S≤0.003; N
2≤ 0.003; O
2≤ 0.002; Surplus is Fe and unavoidable impurities.
Its hot rolling technology of method of the present invention is since the thick hot roughing plate of 30～40mm, and by six passage hot finishing to 2.0～2.4mm, total reduction ratio is 92～94%, and percentage pass reduction is 20～40%.The hot rolling heating-up temperature is 1130～1180 ℃, and finishing temperature is that 830～870 ℃, coiling temperature are 580～620 ℃.Hot rolled plate enters cold rolling process after pickling.
Its cold-rolling process of method of the present invention 2.0～2.4mm hot rolled plate after the pickling, adopt the once cold rolling method to roll finished product thickness 0.35,0.50 and 0.65mm, total reduction ratio is 73～85%, cold rolling five passages that are divided into, percentage pass reduction is 20～35%, and cold rolling direction is consistent with the hot rolling direction all the time.After cold rolling, the finished products through 900～1050 ℃, 10 seconds～5 minutes is coated with insulating barrier and winding again and promptly makes low-iron-loss cold-rolled orientation free silicon steel plate.
Adopt the cold-rolled non-oriented silicon steel of method manufacturing of the present invention to compare iron loss (P with the silicon steel plate congruent, same specification that common process is produced
15) tangible reduction arranged.
Because method of the present invention is just by improving and adjust the purpose that rolling mode and technological parameter reach the reduction iron loss, so implement at existing production line more easily on technology.
The specific embodiment
Below in conjunction with specific embodiment method of the present invention is done further to replenish and explanation.
Embodiment 1
Chemical composition (by weight percentage) is: C 0.0028; Si+Al=2.54+0.31; Mn 0.30; P 0.018; S0.0022; N
20.0015; O
20.0018; The continuous casting billet of surplus Fe and unavoidable impurities, after 1180 ℃ of soaking, first roughing is then carried out the hot finishing of six passages to 2.0mm to 30mm, total reduction ratio is 93%, promptly via 30mm → 18.0mm → 10.8mm → 6.5mm → 4.1mm → 2.5mm → 2.0mm.First passage adopts the asymmetrical rolling mode, and top and bottom rolls circumferential speed ratio is 1: 1.28, and all the other passages all adopt synchronous rolling mode.850 ℃ of finishing temperatures, 610 ℃ of coiling temperatures.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.35mm, total reduction ratio is 82%, and percentage pass reduction is 28～30%, i.e. 2.0mm → 1.4mm → 0.98mm → 0.69mm → 0.49mm → 0.35mm.First and last two passage cold rolling process are introduced the asymmetrical rolling mode, and the top and bottom rolls circumferential speed is than being 1:1.05, and all the other passage cold rolling process all adopt synchronous rolling mode.
After cold rolling, the finished products that silicon steel plate carried out 900 ℃, 5 minutes is handled, be coated with insulating barrier again and warehouse for finished product is gone in winding.
Embodiment 2
Chemical composition (by weight percentage) is: C 0.0028; Si+Al=2.54+0.31; Mn 0.30; P 0.018; S0.0022; N
20.0015; O
20.0018; The continuous casting billet of surplus Fe and unavoidable impurities, after 1138 ℃ of soaking, first roughing is to 35mm, and after the hot finishing of six passages is thick to 2.4mm, total reduction ratio is 93%, promptly via 35mm → 21mm → 12.5mm → 7.8mm → 5.2mm → 3.0mm → 2.4mm.Adopt first and last two passage asymmetrical rollings, the roll circumferential speed is than being 1:1.125, and all the other four-pass are synchronous rolling mode.830 ℃ of finishing temperatures, 600 ℃ of coiling temperatures.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.5mm, total reduction ratio is 80%, and percentage pass reduction is 25～30%, i.e. 2.4mm → 1.8mm → 1.35mm → 1.01mm → 0.71mm → 0.5mm.The conventional synchronous rolling mode of preceding four-pass cold rolling process, the extreme trace cold rolling process is introduced the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than employing 1:1.063.
After cold rolling, the finished products that silicon steel plate carried out 1000 ℃, 1 minute is handled, be coated with insulating barrier again and warehouse for finished product is gone in winding.
Embodiment 3
Chemical composition (by weight percentage) is: C 0.005; Si+Al=3.10+1.0; Mn 0.2; P 0.02; S 0.003; N
20.003; O
20.002; The continuous casting billet of Fe surplus, after 1138 ℃ of soaking, first roughing is to 40mm, and the hot finishing of carrying out six passages thereafter is thick to 2.4mm, and total reduction ratio is 94%, promptly via 40mm → 24mm → 14.4mm → 9.14mm → 5.74mm → 3.56mm → 2.4mm.Extreme trace adopts the asymmetrical rolling mode, and top and bottom rolls circumferential speed ratio is 1: 1.30, and all the other passage hot-rolled process all adopt synchronous rolling mode.870 ℃ of finishing temperatures, 620 ℃ of coiling temperatures.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.65mm, total reduction ratio is 73%.Percentage pass reduction is 20～25%, respectively from 2.4mm → 1.88mm → 1.41mm → 1.06mm → 0.85mm → 0.65mm.Extreme trace adopts the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than being 1:1.125, and all the other four-pass adopt synchronous rolling mode.
After cold rolling, silicon steel plate is carried out 1000 ℃, 30 seconds finished products, apply insulating barrier again and warehouse for finished product is gone in winding.
Embodiment 4
Chemical composition (by weight percentage) is: C 0.002; Si+Al=2.10+0.90; Mn 0.35; P 0.018; S 0.0025; N
20.0012; O
20.0010; The continuous casting billet of Fe surplus, after 1150 ℃ of soaking, first roughing is to 35mm, and the hot finishing of then carrying out six passages is thick to 2.4mm, and total reduction ratio is 93%, via 35mm → 21mm → 12.5mm → 7.8mm → 4.8mm → 3.0mm → 2.4mm.Extreme trace adopts the asymmetrical rolling mode, and top and bottom rolls circumferential speed ratio is 1: 1.05, and other passage adopts synchronous rolling mode.845 ℃ of finishing temperatures, coiling temperature are 590 ℃.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.5mm, total reduction ratio 80%, percentage pass reduction is 25～30%, i.e. 2.4mm → 1.8mm → 1.35mm → 1.01mm → 0.71mm → 0.5mm.First passage adopts the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than being 1:1.125, and all the other four-pass all adopt synchronous rolling mode.
After cold rolling, silicon steel plate is carried out 950 ℃, 1 minute finished products, again winding warehouse-in after being coated with insulating barrier.
Embodiment 5
Chemical composition (by weight percentage) is: C 0.002; Si+Al=2.10+0.90; Mn 0.35; P 0.018; S 0.0025; N
20.0012; O
20.0010; The continuous casting billet of Fe surplus, after 1150 ℃ of soaking, first roughing is to 35mm, and the hot finishing of then carrying out six passages is thick to 2.4mm, and total reduction ratio is 93%, promptly via 35mm → 21mm → 12.5mm → 7.8mm → 4.8mm → 3.0mm → 2.4mm.First passage adopts the asymmetrical rolling mode, and the top and bottom rolls circumferential speed is than being 1:1.28, and other passage adopts synchronous rolling mode.850 ℃ of finishing temperatures, 580 ℃ of coiling temperatures.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.5mm, total reduction ratio 80%, percentage pass reduction is 25～30%, i.e. 2.4mm → 1.8mm → 1.35mm → 1.01mm → 0.71mm → 0.5mm.First passage adopts the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than being 1:1.30, and all the other four-pass all adopt synchronous rolling mode.
After cold rolling, silicon steel plate is carried out 950 ℃, 1 minute finished products, again winding warehouse-in after being coated with insulating barrier.
Embodiment 6
Chemical composition (by weight percentage) is: C 0.002; Si+Al=2.10+0.90; Mn 0.35; P 0.018; S 0.0025; N
20.0012; O
20.0010; The continuous casting billet of Fe surplus, after 1150 ℃ of soaking, first roughing is to 35mm, and the hot finishing of then carrying out six passages is thick to 2.4mm, and total reduction ratio is 93%, promptly via 35mm → 21mm → 12.5mm → 7.8mm → 4.8mm → 3.0mm → 2.4mm.First and last two passages adopt the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than being 1:1.17, and other passage adopts synchronous rolling mode.855 ℃ of finishing temperatures, 600 ℃ of coiling temperatures.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.5mm, total reduction ratio 80%, percentage pass reduction is 25～30%, i.e. 2.4mm → 1.8mm → 1.35mm → 1.01mm → 0.71mm → 0.5mm.First and last two passages adopt the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than being 1:1.17, and all the other passages all adopt synchronous rolling mode.
After cold rolling, silicon steel plate is carried out 950 ℃, 1 minute finished products, again winding warehouse-in after being coated with insulating barrier.
Embodiment 7
Chemical composition (by weight percentage) is: C 0.003; Si+Al=2.0+1.0; Mn 0.25; P 0.010; S 0.0025; N
20.001; O
20.0015; The continuous casting billet of Fe surplus, after 1130 ℃ of soaking, first roughing is to 35mm, and the hot finishing of then carrying out six passages is thick to 2.4mm, and total reduction ratio is 93%, promptly via 35mm → 21mm → 12.5mm → 7.8mm → 4.8mm → 3.0mm → 2.4mm.First passage adopts the asymmetrical rolling mode, and the circumferential speed ratio of top and bottom rolls is 1: 1.17, and other passage adopts synchronous rolling mode.860 ℃ of finishing temperatures, coiling temperature are 605 ℃.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.50mm, total reduction ratio 80%, percentage pass reduction is 25～30%, i.e. 2.4mm → 1.80mm → 1.35mm → 1.01mm → 0.71mm → 0.50mm.Extreme trace time cold rolling process is introduced the asymmetrical rolling mode, and the circumferential speed ratio of top and bottom rolls is 1: 1.063, and all the other passages are synchronous rolling mode.
After cold rolling, silicon steel plate is carried out 950 ℃, 1 minute finished products, again winding warehouse-in after being coated with insulating barrier.
Embodiment 8
Chemical composition (by weight percentage) is: C 0.003; Si+Al=2.0+1.0; Mn 0.25; P 0.010; S 0.0025; N
20.001; O
20.0015; The continuous casting steel billet of Fe surplus, after 1135 ℃ of soaking, roughing is thick to 35mm, and the hot finishing of carrying out six passages then is to 2.4mm, and total reduction ratio is 93%, promptly via 35mm → 21mm → 12.5mm → 7.8mm → 4.8mm → 3.0mm → 2.4mm.The first and last passage adopts the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than being 1:1.063, and other passage adopts synchronous rolling mode.840 ℃ of finishing temperatures, coiling temperature are 600 ℃.
Behind the pickling descale, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.35mm, total reduction ratio 85%, percentage pass reduction is 30～35%, i.e. 2.4mm → 1.56mm → 1.02mm → 0.71mm → 0.50mm → 0.35mm.First passage cold rolling process is introduced the asymmetrical rolling mode, and the circumferential speed of top and bottom rolls is than being 1:1.05, and all the other passages are synchronous rolling mode.
After cold rolling, silicon steel plate is carried out 1050 ℃, 10 seconds finished products, again winding warehouse-in after being coated with insulating barrier.
Claims (6)
1, a kind of method of making low-iron-loss cold-rolled orientation free silicon steel plate with asynchronous rolling process, comprise smelting, continuous casting, hot rolling, pickling, cold rolling, anneal, be coated with insulating barrier and each operation of winding, it is characterized in that: introduce the asymmetrical rolling mode in hot fine rolling and the cold rolling process, the circumferential speed of the upper and lower working roll of asynchronous rolling machine is than being 1:1.05～1:1.30 comprehensively; Cold rolling employing once cold rolling method, total reduction ratio is 73～85%, percentage pass reduction is 20～35%.
2, make the method for low-iron-loss cold-rolled orientation free silicon steel plate by claim 1 is described with asynchronous rolling process, it is characterized in that passage asymmetrical rolling headed by said comprehensive introducing asymmetrical rolling mode.
3,, it is characterized in that said comprehensive introducing asymmetrical rolling mode is an extreme trace time asymmetrical rolling by the described method of claim 1 with asynchronous rolling process manufacturing low-iron-loss cold-rolled orientation free silicon steel plate.
4,, it is characterized in that said comprehensive introducing asymmetrical rolling mode is first and last twice time asymmetrical rollings by the described method of claim 1 with asynchronous rolling process manufacturing low-iron-loss cold-rolled orientation free silicon steel plate.
5, by the described method with asynchronous rolling process manufacturing low-iron-loss cold-rolled orientation free silicon steel plate of claim 1, it is characterized in that said hot fine rolling operation is divided into six passages, total reduction ratio is 92～94%, and the reduction ratio of each passage is 20～40%.
6, a kind of with the described method of claim 1 with asynchronous rolling process manufacturing low-iron-loss cold-rolled orientation free silicon steel plate, it is characterized in that the low-iron-loss cold-rolled orientation free silicon steel plate of manufacturing, composition percentage by weight is calculated as: Si+Al≤4.2; C≤0.005; Mn0.2～0.35; P≤0.02; S≤0.003; N
2≤ 0.003; O
2≤ 0.002; Surplus is Fe and inevitable other impurity.
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Families Citing this family (14)
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| CN101967602B (en) * | 2010-10-19 | 2012-08-08 | 东北大学 | Non-oriented silicon steel thin strip and preparation method thereof |
| CN103071677B (en) * | 2012-12-29 | 2015-09-09 | 东北大学 | A kind of Differential speed rolling technology prepares the method for orientation silicon steel |
| CN105772502A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Asymmetrical rolling method for producing high-grade non-oriented silicon steel |
| CN105779727B (en) * | 2014-12-23 | 2018-01-05 | 鞍钢股份有限公司 | A kind of hot rolling production method for improving non-oriented electrical steel electromagnetic performance |
| CN105779729A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Hot-rolling production method capable of improving surface quality of high-silicon non-oriented electrical steel |
| CN105986176A (en) * | 2015-03-03 | 2016-10-05 | 鞍钢股份有限公司 | Production method of half-process cold-rolled non-oriented electrical steel |
| CN106521334B (en) * | 2016-10-28 | 2018-05-04 | 东北大学 | The preparation method of high strength and ductility low-carbon silicomanganese system's Q＆P steel plates and asymmetrical rolling |
| CN108906887A (en) * | 2018-06-14 | 2018-11-30 | 沈阳大学 | A kind of preparation method of electric machine iron core orientation free silicon steel plate |
| CN110157976B (en) * | 2019-06-28 | 2020-11-03 | 辽宁石油化工大学 | Preparation method of Fe-6.9% Si thin strip containing rare earth Nd |
| CN111687210A (en) * | 2020-05-18 | 2020-09-22 | 包头钢铁（集团）有限责任公司 | Method for producing 0.35mm non-oriented silicon steel by using cold continuous rolling mill |
| CN113512635B (en) * | 2021-07-09 | 2022-12-02 | 马鞍山钢铁股份有限公司 | Low-iron-loss non-oriented electrical steel suitable for high-frequency working condition and production method thereof |
| CN113399454B (en) * | 2021-07-14 | 2023-05-02 | 安徽凤杰金属资源有限公司 | High-stability metal ultrathin strip processing technology |
| CN113492153B (en) * | 2021-07-16 | 2023-01-31 | 山西太钢不锈钢股份有限公司 | Rolling method of austenitic stainless steel and austenitic stainless steel for electronic components |
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