CN103031425A - Method for producing non-oriented electrical steel coated semi-processed product - Google Patents
Method for producing non-oriented electrical steel coated semi-processed product Download PDFInfo
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- CN103031425A CN103031425A CN2011103030908A CN201110303090A CN103031425A CN 103031425 A CN103031425 A CN 103031425A CN 2011103030908 A CN2011103030908 A CN 2011103030908A CN 201110303090 A CN201110303090 A CN 201110303090A CN 103031425 A CN103031425 A CN 103031425A
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Abstract
The invention provides a method for producing a non-oriented electrical steel coated semi-processed product. The method is applicable to cold-rolled electrical steel needing punching stress relief annealing treatment after punching annealing and mainly comprises the processes of smelting, hot rolling, cold rolling, annealing, coating, rewinding and packaging. The method is characterized in that a bending-straightening process is added after annealing of a finished product before coating, the relationship between the diameter D of a bending roll of a multi-roll steel belt repeated-bending device and the thickness d of a steel plate is 10d<=D<=20d; the relationships among the tensile force F of a finished steel plate, the cross section S of the steel plate and the yield strength RP0.2 are 0.8*S* Rp0.2<=F<=1.6*S*Rp0.2; and the insertion depth of the bending roll is not smaller than the radius of the bending roll. The method is simple and feasible; and without changing production processes, a design of different technological parameters of repeated bending is adopted, so that each grade of steel achieves optimal critical deformation and work hardening modulus and the further improvement on the electromagnetic property of the finished product is promoted.
Description
Technical field
The invention belongs to the electrical steel production technical field, relate in particular to a kind of method of producing non-oriented electrical steel coated semi handicraft product.
Background technology
Half handicraft product was to adopt the cold roll production that certain roughness is arranged in the past, with critical draft produce without coating prod.After annealing, increase the once cold rolling operation, need to increase certain equipment investment.The iron core of producing without coating prod in addition is because short circuit between each lamination causes the iron core vortex loss larger.
Mostly cold rolling non-orientation silicon steel is that with the moulding of high speed stamping automatic laminating moulding is to rely on the shrink-fit between the riveting button to realize.And shrink range is relevant with the intensity of material, and the intensity that improves steel can increase the iron core rivet force.Silicon steel is in order to reach preferably electromagnetic performance generally with annealed state delivery, and the intensity of steel is lower after the annealing, and this high strength that requires during with folded riveting contradicts.
Summary of the invention
The object of the invention is to overcome the existing defective of above-mentioned prior art, provide that a kind of alternating bending makes deformation of products or energy storage to steel plate before the coating behind finished products, and then improve the production method of the non-oriented electrical steel coated semi handicraft product of its intensity and electromagnetic performance.
The present invention is achieved in that the method for this production non-oriented electrical steel coated semi handicraft product is applicable to need carry out the cold rolling electric that the punching stress relief annealing is processed after the punching annealing, mainly comprise smelting, hot rolling, cold rolling, annealing, coating, rewinding, packaging process, be characterized in increasing by one bending straightening operation before the coating behind finished products, the bending roll diameter D of the multiple roll steel band alternating bending device that adopts and the pass between the steel plate thickness d are: 10d≤D≤20d; Finished steel plate tension force F and steel plate cross section S and yield strength Rp
0.2The pass be: 0.8 * S * Rp
0.2≤ F≤1.6 * S * Rp
0.2The bending roll depth of penetration is not less than the bending roll radius.
The bending roll diameter does not have too greatly bending effect, and too little meeting makes steel band that broken belt occur in BENDING PROCESS.The purpose that steel plate applies tension force is in order to make steel plate that certain viscous deformation occur, to increase dislocation desity, and tension force too conference makes steel produce significantly surrender, even broken belt.The bending roll depth of penetration determines the alternating bending angle, and angle reaches 180, and effect is best repeatedly when spending, and the too little flecition that do not have realizes difficulty when spending greater than 180.
The present invention adopts this bending straightening operation to produce certain extension and metamorphosis to steel plate, improve steel band skin stress state or further by work hardening steel band is carried out energy storage, promote to improve effect after the punching annealing, and then promote the electromagnetic performance of the finished product.For guaranteeing that steel plate has preferably plate shape, set up again a straightener after being preferably in this multiple roll steel band alternating bending device.
The inventive method is simple, in the situation that does not change production process before and after the existing product, adopt different alternating bending process parameters design, make each trade mark reach best critical strain and work hardening amount, promote the finished product electromagnetic performance further to promote, improved the competitiveness of product in market.Simultaneously alternating bending increases the energy storage of steel plate internal modification, makes plate plate strength increase, is conducive to improve the punching performance.The steel plate internal modification can increase and is conducive to grain growth Speed improving in the punching annealing process in addition, has improved electromagnetic performance.
Embodiment
The present invention is further described by the following embodiment.
The chemical component weight per-cent of embodiment of the invention electrical steel is: C:0.002%, and Si:2.05%, Mn:0.30%, P:0.012%, S:0.002%, Als:0.23%, all the other are iron and inevitable impurity element.
Embodiment of the invention production method comprises following process steps:
A) smelt: adopt converter smelting, the RH vacuum refinement is processed, and molten steel composition is by above-mentioned requirements control, and continuous casting becomes steel billet;
B) hot rolling and normalizing are processed: with heating steel billet to 1100 ℃, start rolling temperature is 1020 ℃, and finishing temperature is 860 ℃, and coiling temperature is 650 ℃, and the Hot Rolled Plate Normalizing temperature is 920 ℃;
C) cold rolling finished products: steel plate adopts 930 ℃ of continuous annealings after cold continuous rolling becomes 0.5mm thick.Steel plate width is 1020mm.
D) bending straightening: increase by 11 roller steel band alternating bending devices behind finished products before the coating, bending roll diameter D is 7.5mm, and bending roll depth of penetration and unit operation tension force are as shown in table 1.Promote steel band top layer deformation and extension by the technique adjustment.Finished steel plate yield strength Rp
0.2Be 440Mpa.Steel plate tension force F=1.2 * S * Rp
0.2=1.2 * 1.02 * 0.0005 * 440 * 100000=27 (kN) is such as embodiment 1.
Table 1 embodiment of the invention straightening roll depth of penetration, steel plate tension force and effect
*Electromagnetic performance is performance after the punching stress relief annealing in the table
Claims (1)
1. method of producing non-oriented electrical steel coated semi handicraft product, be applicable to carry out the cold rolling electric that the punching stress relief annealing is processed after the punching annealing, mainly comprise smelting, hot rolling, cold rolling, annealing, coating, rewinding, packaging process, it is characterized in that increasing by one bending straightening operation before the coating behind finished products, the bending roll diameter D of the multiple roll steel band alternating bending device that adopts and the pass between the steel plate thickness d are: 10d≤D≤20d; Finished steel plate tension force F and steel plate cross section S and yield strength Rp
0.2The pass be: 0.8 * S * Rp
0.2≤ F≤1.6 * S * Rp
0.2The bending roll depth of penetration is not less than the bending roll radius.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103030908A CN103031425A (en) | 2011-09-29 | 2011-09-29 | Method for producing non-oriented electrical steel coated semi-processed product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103030908A CN103031425A (en) | 2011-09-29 | 2011-09-29 | Method for producing non-oriented electrical steel coated semi-processed product |
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| CN103031425A true CN103031425A (en) | 2013-04-10 |
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| CN2011103030908A Pending CN103031425A (en) | 2011-09-29 | 2011-09-29 | Method for producing non-oriented electrical steel coated semi-processed product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112912186A (en) * | 2018-10-24 | 2021-06-04 | 日本制铁株式会社 | Non-oriented magnetic steel sheet and method for manufacturing laminated iron core using same |
Citations (4)
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|---|---|---|---|---|
| WO1997022723A1 (en) * | 1995-12-19 | 1997-06-26 | Pohang Iron & Steel Co., Ltd. | Process for producing nondirectional electrical steel sheet excellent in close adhesion of insulating film |
| CN1864879A (en) * | 2006-06-06 | 2006-11-22 | 湖南华菱涟源钢铁有限公司 | A method for making semi-processed cold rolled silicon steel in thin slab continuous casting and continuous rolling process |
| CN1887512A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | Production process of cold rolled orientation-free electrical steel plate with low iron loss and high magnetic induction |
| CN101492786A (en) * | 2008-01-23 | 2009-07-29 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
-
2011
- 2011-09-29 CN CN2011103030908A patent/CN103031425A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997022723A1 (en) * | 1995-12-19 | 1997-06-26 | Pohang Iron & Steel Co., Ltd. | Process for producing nondirectional electrical steel sheet excellent in close adhesion of insulating film |
| CN1887512A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | Production process of cold rolled orientation-free electrical steel plate with low iron loss and high magnetic induction |
| CN1864879A (en) * | 2006-06-06 | 2006-11-22 | 湖南华菱涟源钢铁有限公司 | A method for making semi-processed cold rolled silicon steel in thin slab continuous casting and continuous rolling process |
| CN101492786A (en) * | 2008-01-23 | 2009-07-29 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
Non-Patent Citations (2)
| Title |
|---|
| 日本塑性加工学会编，江国屏等译: "《压力加工手册》", 31 October 1984 * |
| 王华春主编: "《精整工》", 30 April 2011, 中国建材工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112912186A (en) * | 2018-10-24 | 2021-06-04 | 日本制铁株式会社 | Non-oriented magnetic steel sheet and method for manufacturing laminated iron core using same |
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Application publication date: 20130410 |