Hot rolling method of cold-rolling low-carbon non-oriented electrical steel

An oriented electrical steel, low-carbon and low-silicon technology, which is applied in the field of hot rolling of cold-rolled low-carbon, low-silicon non-oriented electrical steel, can solve the problem of restricting the production, promotion, high cost, Long development cycle and other problems, to achieve the effect of stable rolling state, lower production cost, and simplified control method
CN101654731BInactive Publication Date: 2011-04-27PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PANGANG GROUP RESEARCH INSTITUTE CO LTD
Publication Date
2011-04-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a manufacture method of cold-rolling non-oriented electrical steel, in particular to a hot rolling method of cold-rolling low-carbon non-oriented electrical steel, comprising a finishing step and a coiling step after the finishing step. At least two passes of rolling are carried out on a plate blank in the finishing step; two phase regions of the austenite and the ferriteof a plate blank have a temperature range with an upper limit lower than 900 DEG C and a lower limit higher than 850 DEG C; and the plate blank is forcefully cooled between two adjacent passes in thefinishing step and has a rolling temperature higher than 900 DEG C in the prior pass and a rolling temperature lower than 850 DEG C in the later pass. The hot rolling method enables a common finishing mill group to be suitable for the production of the cold-rolling low-carbon non-oriented electrical steel, simplifies the control method, decreases the production cost and is beneficial to the production and the popularization of the cold-rolling low-carbon non-oriented electrical steel.
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Description

technical field

[0001] The invention relates to a method for manufacturing cold-rolled non-oriented electrical steel, in particular to a method for hot-rolling cold-rolled low-carbon and low-silicon non-oriented electrical steel. Background technique

[0002] The main performance parameters of cold-rolled non-oriented electrical steel include iron loss, magnetic induction, punching performance, lamination coefficient, etc. Traditional cold-rolled non-oriented electrical steel usually relies on increasing silicon content to reduce iron loss. However, with the increase of silicon content, the magnetic induction and saturation magnetic induction decrease, and the hardness and yield strength increase significantly, reducing impact. tablet performance. Therefore, in order to meet the needs of low iron loss, high magnetic induction, and good punching performance in the manufacture of micro and small motors, small transformers, etc., a cold-rolled low-carbon, low-silicon, non-orie...

Claims

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