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Production method of non-oriented electrical steel coating semi-processed product

A technology of oriented electrical steel and production method, which is applied in the field of electrical steel production, can solve problems such as inability to obtain excellent electromagnetic properties, and achieve the effects of retaining excellent characteristics, continuous and efficient production, and saving energy consumption

Active Publication Date: 2013-04-10
ANGANG STEEL CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This product retains the processing performance required by the user, but because there is no "critical reduction" treatment, the product can only be obtained in the stress-relief annealing after punching, which is similar to the original steel product performance and cannot be obtained due to the abnormal growth of the structure. Excellent electromagnetic properties obtained

Method used

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  • Production method of non-oriented electrical steel coating semi-processed product

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Embodiment Construction

[0010] The present invention will be further described below by way of examples.

[0011] The chemical composition of the cold-rolled non-oriented silicon steel in the embodiment of the present invention is: C: 0.004%, Si: 1.14%, Mn: 0.33%, P: 0.12%, S: 0.002%, Als: 0.28%. Its main production process is: converter smelting, RH vacuum refining, steel billet heated at 1120°C and then rolled into 2.2mm thick hot-rolled sheet, hot-rolled sheet coiling temperature is 710°C, hot-rolled sheet cold-rolled to 0.5mm, cold-rolled sheet Annealed at 910°C×2min. The yield strength of the finished plate is 260Mpa, and the width of the finished plate is 1030mm. In the embodiment of the present invention, a group of five-roller tension leveling devices are added between the uncoiling and coiling process sections of the recoil operation line, and the tension F applied to the finished steel plate satisfies: S×Rp 0.2 ≤F≤1.2×S×Rp 0.2 , such as the pulling force F=1.1×0.0005×1.030×245×1000000=13...

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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 [0001] The invention belongs to the technical field of electrical steel production, in particular to a method for manufacturing a cold-rolled non-oriented electrical steel coated semi-process product. Background technique [0002] The best way to use cold-rolled non-oriented electrical steel products is to anneal after punching to prepare electromagnetic conversion components for motors or electrical appliances, which can eliminate the deterioration of electromagnetic properties caused by processing stress during punching and processing. The semi-process products widely used at home and abroad have successfully solved this problem. With the help of the user's annealing equipment, the electrical steel production plant can improve the heat treatment process, and successfully solve the control contradiction between the iron loss and magnetic induction in the electromagnetic properties, and achieve high-efficiency production. performance indicators of the product...

Claims

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Application Information

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IPC IPC(8): C21D8/12C21D8/02
Inventor 高振宇张智义金文旭张仁波李文权罗理张本尊李亚东石良陈春梅
Owner ANGANG STEEL CO LTD
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