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Method for producing non-oriented electrical steel coated semi-process products

A technology of grain-oriented electrical steel and production method, applied in the direction of manufacturing tools, other manufacturing equipment/tools, etc., can solve the problems of large iron core eddy current loss, increase equipment investment, etc., to improve electromagnetic performance, increase product energy storage, grain size The effect of increased growth rate

Active Publication Date: 2015-10-07
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production process of this product, a cold rolling process needs to be added after annealing, so a certain amount of equipment investment is required
In addition, the eddy current loss of the iron core produced by uncoated products is relatively large

Method used

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  • Method for producing non-oriented electrical steel coated semi-process products

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Embodiment Construction

[0008] The present invention will be further described below by way of examples.

[0009] The weight percent of the chemical composition of the electrical steel in the embodiment of the present invention is: C: 0.002%, Si: 2.35%, Mn: 0.27%, P: 0.015%, S: 0.003%, Als: 0.24%, the rest is iron and unavoidable impurity elements.

[0010] The production method of the embodiment of the present invention comprises the following process steps:

[0011] a) Smelting: use converter smelting, RH vacuum refining treatment, the composition of molten steel is controlled according to the above requirements, and continuous casting into billets;

[0012] b) Hot rolling and normalizing treatment: heating the steel billet to 1100°C, starting rolling temperature at 1020°C, finishing rolling temperature at 860°C, coiling temperature at 650°C, and hot rolled sheet normalizing temperature at 920°C;

[0013] c) Annealing of cold-rolled finished products: the steel plate is continuously annealed at 9...

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Abstract

The invention relates to a production method for a non-oriented electrical steel coating semi-technical product. The method is appropriate for cold-rolled electrical steel which needs stamped steel stress relief annealing treatment after stamped steel annealing, and mainly comprises the processes of smelting, hot rolling, cold rolling, annealing, coating, recoiling and packaging. The method is characterized in that on a recoiling operation line, a curve straightening process is added between an uncoiling process and a coiling process, the relation between the diameter D of each bending roll of a multi-roll steel belt alternating bending device and the thickness d of a steel plate is 10d< / =D< / =20d; the relation among the tension force F of a finished product, the cross section S of the steel plate and yield strength Rp0.2 is 0.8*S*Rp0.2< / =F< / =1.6*S*Rp0.2; and the insertion depth of each bending roll is not smaller than the radius of each bending roll. The method disclosed by the invention is simple and feasible, under the condition of not changing the production processes of the original product, a cold rolling process is replaced by alternating bending, so that the internal deformation stored energy of the steel plate is increased, the strength of the steel plate is increased, and the performance of a stamped steel is improved; and the increase of internal deformation of the steel plate is conductive to the improvement of the electromagnetic performance of the steel plate.

Description

technical field [0001] The invention belongs to the technical field of electrical steel production, and in particular relates to a production method of non-oriented electrical steel coated semi-process products. Background technique [0002] In the past, semi-process products were produced by cold rolls with a certain roughness. Uncoated semi-process products produced at a critical reduction rate can improve the riveting performance of punching sheets. However, in the production process of this product, a cold rolling process needs to be added after annealing, so a certain amount of equipment investment needs to be increased. In addition, the eddy current loss of the iron core produced by the uncoated product is relatively large. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned defects in the prior art, and to provide a non-critical cold-rolling process that repeatedly bends the steel plate on the recoil operation l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/04C21D8/12C21D8/02
Inventor 高振宇张智义金文旭李亚东李文权罗理张仁波刘立新刘文鹏陈春梅
Owner ANGANG STEEL CO LTD
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