CN103031423A - Method for improving performance of high-efficiency and high-grade non-oriented electrical steel product - Google Patents
Method for improving performance of high-efficiency and high-grade non-oriented electrical steel product Download PDFInfo
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- CN103031423A CN103031423A CN2011103030715A CN201110303071A CN103031423A CN 103031423 A CN103031423 A CN 103031423A CN 2011103030715 A CN2011103030715 A CN 2011103030715A CN 201110303071 A CN201110303071 A CN 201110303071A CN 103031423 A CN103031423 A CN 103031423A
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Abstract
The invention provides a method for improving performance of high-efficiency and high-grade non-oriented electrical steel product and is suitable for cold rolled electrical steel which needs hot rolled plate normalizing treatment before being cold rolled. The method for improving the performance of the high-efficiency and high-grade non-oriented electrical steel product mainly comprises a smelting process, a hot rolling process, a normalizing process, a cold rolling process and an annealing process. The method for improving the performance of the high-efficiency and high-grade non-oriented electrical steel product is characterized in that a drawing process is added between the hot rolling process and the normalizing process, and is realized by a set of withdrawal and straightening devices. A tensile force F applied to a steel plate meets the following relational expression: F is not less than S*Rp0.2 but is not greater than 1.2*S*Rp0.2, wherein S refers to the cross sectional area of a hot rolled plate, and Rp0.2 refers to the yield strength of the hot rolled plate. By adopting the method provided by the invention, by aiming at the drawing process parameter design of the high-efficiency and high-grade non-oriented electrical steel product with different grades, all grades can respectively reach the best tension parameter of critical strain, and therefore, the electromagnetic performance of a finished product is further promoted, and the market competitiveness of the product is improved. Meanwhile, a surface adhesion iron sheet is also promoted to loosen through the drawing process, so that the product pickling quality is improved.
Description
Technical field
The invention belongs to the electrical steel production technical field, relate in particular to a kind of method that stretching device improves efficient and high grade electrical steel product performance of using.
Background technology
Cold rolling non-oriented electrical steel is processed by normalizing efficiently and in the high trade mark products production and is improved hot rolled strip original structure homogeneity and alligatoring is mingled with and two-phase, improves the favorable texture component, improves the product electromagnetic performance with this.In electrical steel product market competition day by day serious today, how further the electromagnetic performance index of improving product becomes R﹠D personnel's top priority.
In cold rolling electrical steel product was produced, the hot-rolled steel sheet surface was for waiting axle recrystallized structure, and the centre is banded structure, and along with the raising of silicone content, the equiaxed structure ratio further reduces; Top layer equiaxed grain structure favorable texture component is far above heart section banded structure, but conventional Hot Rolled Plate Normalizing processed, and because heart section deformation quantity is large, recrystallize speed is high, cause whole normalizing after, favourable component reduces.
Summary of the invention
The object of the invention is to overcome the existing defective of above-mentioned prior art; provide a kind of application stretching device to the further machining deformation in steel plate top layer or energy storage; to promote textura epidermoidea in normalizing is processed, to first develop; obtain preferably normalized structure, and then improve the method that non-oriented electrical steel efficiently reaches high trade mark product electromagnetic performance.
The present invention is achieved in that this raising non-oriented electrical steel efficiently and the method for high trade mark product performance is applicable to the cold rolling electric that cold rolling front need carry out the Hot Rolled Plate Normalizing processing; mainly comprise smelting, hot rolling, normalizing, cold rolling, annealing operation; be characterized in increasing by one stretching process before normalizing is processed after hot rolling; realized that by one group of straightening device the tensile force f that steel plate is applied should satisfy: S * Rp
0.2≤ F≤1.2 * S * Rp
0.2,
Wherein: S is the hot-rolled sheet cross-sectional area; Rp
0.2Be the hot-rolled sheet yield strength.
What form in the high grade cold rolling non-oriented silicon steel hot-rolled sheet operation of rolling is the plate texture that is parallel to rolling surface with (111) face, and this unfavorable texture can be genetic to finished product, and (111) plane texture is unfavorable to magnetic property.The present invention enters the position, stokehold or sets up a straightening device in the Abrollhaspel front at steel band; and match with straightening device before the existing cold rolling electric normalizing machine welding machine; between two straightening devices, set up tension force; thereby make steel plate produce certain viscous deformation; hot-rolled sheet part crystal grain is around＜111〉the crystal orientation rotation; (111) plate texture is converted into＜111〉silk weaving structures,＜111〉silk weaving structures＜111〉crystal orientation be parallel to draw direction, thus steel plate texture improved.
Adopt the inventive method, and the drawing parameter of and high trade mark product efficient for different trades mark design, can make each trade mark reach the tension parameters of best critical strain, thereby promote the finished product electromagnetic performance further to promote, improve the competitiveness of product in market, also promote the surface adhesion iron sheet loose by drawing process simultaneously, improved the product pickling quality.
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:0.003%, and Si:2.1%, Mn:0.25%, P:0.13%, S:0.004%, Als:0.34%, all the other are iron and inevitable impurity element.
The main production flow process of embodiment of the invention electrical steel is: converter smelting; the RH vacuum refinement; steel billet rolls into the thick hot-rolled sheet of 2.2mm after 1150 ℃ of heating; it is 720 ℃ that hot-rolled sheet batches temperature; hot-rolled sheet is cold-rolled to 0.5mm after 950 ℃ * 1.5min normalizing, cold-reduced sheet is annealed through 930 ℃ * 2min.The hot-rolled sheet yield strength is 395Mpa, and the hot-rolled sheet width is 1020mm.The embodiment of the invention enters the position, stokehold at steel band and sets up five roller straightening devices, matches with five roller straightening devices before the existing normalizing machine welding machine, sets up tension force between two straightening devices, and the tensile force f of applying for the normalizing front spring satisfies S * Rp
0.2≤ F≤1.2 * S * Rp
0.2, such as the tensile force f of embodiment 1=1.1 * 0.0022 * 1.020 * 395=975 (kN).
The performance of embodiment of the invention electrical steel sees Table 1.
The performance of table 1 embodiment of the invention electrical steel
Claims (1)
1. one kind is improved non-oriented electrical steel efficiently and the method for high trade mark product performance; be applicable to cold rolling front need and carry out the cold rolling electric that Hot Rolled Plate Normalizing is processed; mainly comprise smelting, hot rolling, normalizing, cold rolling, annealing operation; it is characterized in that increasing by one stretching process before normalizing is processed after hot rolling; realized that by one group of straightening device the tensile force f that steel plate is applied should satisfy: S * Rp
0.2≤ F≤1.2 * S * Rp
0.2, wherein S is the hot-rolled sheet cross-sectional area; Rp
0.2Be the hot-rolled sheet yield strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103030715A CN103031423A (en) | 2011-09-29 | 2011-09-29 | Method for improving performance of high-efficiency and high-grade non-oriented electrical steel product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103030715A CN103031423A (en) | 2011-09-29 | 2011-09-29 | Method for improving performance of high-efficiency and high-grade non-oriented electrical steel product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103031423A true CN103031423A (en) | 2013-04-10 |
Family
ID=48018822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103030715A Pending CN103031423A (en) | 2011-09-29 | 2011-09-29 | Method for improving performance of high-efficiency and high-grade non-oriented electrical steel product |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107626754A (en) * | 2016-07-18 | 2018-01-26 | 鞍钢股份有限公司 | A kind of method for improving cold rolling electrical steel product pickling quality |
| CN112195319A (en) * | 2020-09-25 | 2021-01-08 | 张家港扬子江冷轧板有限公司 | Normalizing treatment method for preventing non-oriented silicon steel from being internally oxidized |
| CN112877527A (en) * | 2021-01-11 | 2021-06-01 | 长春工业大学 | Method for preparing high-strength non-oriented electrical steel based on critical deformation |
| CN114369754A (en) * | 2021-11-29 | 2022-04-19 | 广东中晟电磁科技股份有限公司 | Method for producing low-and-medium-grade non-oriented electrical steel through prestress |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041222A (en) * | 2006-03-22 | 2007-09-26 | 宝山钢铁股份有限公司 | Cold-rolled non-oriented electrical steel and the method for preparing the same |
-
2011
- 2011-09-29 CN CN2011103030715A patent/CN103031423A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041222A (en) * | 2006-03-22 | 2007-09-26 | 宝山钢铁股份有限公司 | Cold-rolled non-oriented electrical steel and the method for preparing the same |
Non-Patent Citations (1)
| Title |
|---|
| 王华春: "《精整工》", 30 April 2011, article "2.2.1拉伸矫直", pages: 2.2.1 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107626754A (en) * | 2016-07-18 | 2018-01-26 | 鞍钢股份有限公司 | A kind of method for improving cold rolling electrical steel product pickling quality |
| CN112195319A (en) * | 2020-09-25 | 2021-01-08 | 张家港扬子江冷轧板有限公司 | Normalizing treatment method for preventing non-oriented silicon steel from being internally oxidized |
| CN112877527A (en) * | 2021-01-11 | 2021-06-01 | 长春工业大学 | Method for preparing high-strength non-oriented electrical steel based on critical deformation |
| CN112877527B (en) * | 2021-01-11 | 2023-01-31 | 长春工业大学 | Method for preparing high-strength non-oriented electrical steel based on critical deformation |
| CN114369754A (en) * | 2021-11-29 | 2022-04-19 | 广东中晟电磁科技股份有限公司 | Method for producing low-and-medium-grade non-oriented electrical steel through prestress |
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Application publication date: 20130410 |