CN103031421A - Production method of non-oriented electrical steel coating semi-processed product - Google Patents
Production method of non-oriented electrical steel coating semi-processed product Download PDFInfo
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- CN103031421A CN103031421A CN2011103030433A CN201110303043A CN103031421A CN 103031421 A CN103031421 A CN 103031421A CN 2011103030433 A CN2011103030433 A CN 2011103030433A CN 201110303043 A CN201110303043 A CN 201110303043A CN 103031421 A CN103031421 A CN 103031421A
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Abstract
The invention provides a production method of a non-oriented electrical steel coating semi-processed product. The production method of the non-oriented electrical steel coating semi-processed product mainly comprises the procedures of smelting, hot rolling, cold rolling, annealing, coating, rewinding and packing. The production method of the non-oriented electrical steel coating semi-processed product is characterized in that on a rewinding operating line, a stretching procedure is added between an unwinding technology section and a winding technology section and realized by a group of straightening and withdrawal devices; a pull force F is applied onto a coated steel plate; and moreover, F which is more than or equal to S*Rp0.2 but less than or equal to 1.2*S*Rp0.2 is satisfied, wherein S represents the cross sectional area of a finished steel plate and Rp0.2 represents the yield strength of the finished steel plate. With the adoption of the production method of the non-oriented electrical steel coating semi-processed product, not only can the continuous high-efficiency production be realized, but also the energy consumption can be saved and the smoothing procedure can be omitted; not only can the processing performance and the mechanical performance required by a user be kept, but also the electromagnetic performance abnormality improvement after the reannealing can be realized; not only can the excellent characteristics of the traditional semi-processed product be kept, but also the great improvement in the installation performance through the coating can be realized; and in addition, the standard grade of steel can be selected while marks are reduced and the production stability of the whole system can be maintained.
Description
Technical field
The invention belongs to the electrical steel production technical field, relate in particular to a kind of manufacture method of cold rolling non-oriented electrical steel coated semi handicraft product.
Background technology
The best use-pattern of cold rolling non-oriented electrical steel product is that the punching after annealing prepares motor or electrical equipment electromagnetic conversion member, can eliminate like this electromagnetic performance that causes because of the machining stress effect in punching and the course of processing and worsen.Widely used half handicraft product has successfully solved this problem both at home and abroad, annealing equipment electrical steel factory by means of the user is improved thermal treatment process, and successfully solve the control contradiction of iron loss and magnetic strength two indexes in the electromagnetic performance, reach the product of high efficiency production high performance index.Existing half handicraft product need carry out " under the critical pressure " after final softening material annealing smooth, and purpose is to promote grain growth or abnormal growth in afterwards user's annealing, obtains excellent electromagnetic performance index.Along with raising and the product of electrical equipment and electrical industry level of automation are saved energy and reduce the cost, the requirement of high-level efficiency index, without coated semi technique basis the coated semi handicraft product is proposed in tradition, purpose is to keep original half handicraft product to contrast the excellent processing characteristics of full handicraft product and again annealing afterwards on the basis of excellent electromagnetic property, by means of the effect of full handicraft product coating to the integrated iron core loss control, obtain whole more excellent electromagnetic performance.
Often produce by means of existing multi-functional continuous annealing furnace in the production of coated semi handicraft product, incomplete recrystallized annealing is adopted in thermal treatment, carries out continuous coated production at the efficient travel line of integral body.This product has kept the required processing characteristics of user, but because processing without " under the critical pressure ", can only obtain after the product punching being similar to former steel grade end properties in user's stress relieving and can not obtain the excellent electromagnetic property of growing up and obtaining because of tissue abnormalities.
Cold rolling electric is the stress sensitivity steel, and along with the raising silicone content raising of the trade mark, more how stress to performance impact can be at the after-applied stress energy storage of product coating, and not destroying again coating is exactly the technological difficulties that the present invention need to solve.
Summary of the invention
The object of the invention is to overcome the existing deficiency of above-mentioned prior art, a kind of efficient production method that can carry out the non-oriented electrical steel coated semi handicraft product of " critical strain and stress energy storage " after finishing coating process to product is provided.
The present invention is achieved in that the production method of this non-oriented electrical steel coated semi handicraft product mainly comprises smelting, hot rolling, cold rolling, annealing, coating, rewinding, packaging process, it is characterized in that on the rewinding service line, between uncoiling and coiling technique section, increase by one stretching process, realized by one group of straightening device, steel plate after the coating is applied certain pulling force, and this tensile force f should satisfy: S * Rp
0.2≤ F≤1.2 * S * Rp
0.2, wherein: S is the production board cross-sectional area; Rp
0.2Be the production board yield strength.
Stretching process of the present invention is realized by one group of straightening device, according to circumstances can select three rollers, five rollers or multiple roll straightening device; Described pulling-straightening roller should be the rubber roll of not hindering steel strip surface.The straightening device possesses thin plate tension leveling function, can realize the little extensional of steel band; Determine the product critical guideline of deformation for the different trades mark or different subjects alloy content; With former unit tension force and continuously operation be consistent and be stable, reach critical strain and energy storage effect with this.
The applicable cold rolling non-orientation silicon steel composition range of the inventive method is: C＜0.010%, Si＜1.6%, Mn＜1.0%, P＜0.20%, S＜0.01%, Als＜1.0%; Mainly be applicable to the user and possess the thermal treatment unit that eliminates stress; Also be applicable to the processing of all kinds of complex chip and assemble required mechanical performance index.Adopt production method of the present invention in the selection of steel grade, can reduce trade mark production with reference to the required trade mark of user, and coating process reaches before, and other processing parameter keep original trade mark production technique constant.
Adopt the inventive method both to realize continuous high-efficient production, saved again energy consumption, reduced smooth operation; Both kept the required processing characteristics of user, mechanical property, realized again that the rear electromagnetic performance of again annealing improved unusually; The excellent specific property that had both kept traditional half handicraft product has realized again the significantly improvement of coating to the installation performance; Also can carry out steel grade with reference to the former trade mark and select, or reduce the trade mark and select, and realize that other process control technology is constant, can make total system production stable.
Embodiment
The present invention is further described by the following embodiment.
The chemical composition of embodiment of the invention cold rolling non-orientation silicon steel is: C:0.004%, Si:1.14%, Mn:0.33%, P:0.12%, S:0.002%, Als:0.28%.Its main production flow process is: converter smelting, and the RH vacuum refinement, steel billet rolls into the thick hot-rolled sheet of 2.2mm after 1120 ℃ of heating, and hot-rolled sheet batches 710 ℃ of temperature, and hot-rolled sheet is cold-rolled to 0.5mm, and cold-reduced sheet is annealed through 910 ℃ * 2min.The production board yield strength is 260Mpa, and finished width is 1030mm.The embodiment of the invention increases by one group of five roller drawing and straightening device between uncoiling on the rewinding service line and coiling technique section, the tensile force f of granting finished steel plate satisfies: S * Rp
0.2≤ F≤1.2 * S * Rp
0.2, such as the tensile force f of embodiment 1=1.1 * 0.0005 * 1.030 * 245 * 1000000=138 (kN).The performance of embodiment of the invention steel plate sees Table 1.
The performance of table 1 embodiment of the invention steel plate
*Electromagnetic performance is performance after the punching stress relief annealing in the table
Claims (2)
1. the production method of a non-oriented electrical steel coated semi handicraft product, mainly comprise smelting, hot rolling, cold rolling, annealing, coating, rewinding, packaging process, it is characterized in that on the rewinding service line, between uncoiling and coiling technique section, increase by one stretching process, realized by one group of straightening device, steel plate after the coating is applied certain pulling force, and this tensile force f should satisfy: S * Rp
0.2≤ F≤1.2 * S * Rp
0.2, wherein: S is the production board cross-sectional area; Rp
0.2Be the production board yield strength.
2. the production method of described non-oriented electrical steel coated semi handicraft product according to claim 1 is characterized in that described straightening device is three rollers, five rollers or multiple roll straightening device; Described pulling-straightening roller is rubber roll.
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| CN201110303043.3A CN103031421B (en) | 2011-09-29 | 2011-09-29 | A kind of production method of non-oriented electrical steel coated semi handicraft product |
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| CN201110303043.3A CN103031421B (en) | 2011-09-29 | 2011-09-29 | A kind of production method of non-oriented electrical steel coated semi handicraft product |
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| CN103031421A true CN103031421A (en) | 2013-04-10 |
| CN103031421B CN103031421B (en) | 2015-11-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779877A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Efficient production method for semi-process 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 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105779877A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Efficient production method for semi-process non-oriented electrical steel |
| CN105779877B (en) * | 2014-12-23 | 2017-10-27 | 鞍钢股份有限公司 | A kind of high-efficiency method for producing of half-technique 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 |
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| CN103031421B (en) | 2015-11-25 |
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