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

A technology of oriented electrical steel, low carbon and low silicon, 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 high cost, restrictions on the production, promotion, Long development cycle and other problems, to achieve the effect of stable rolling state, lower production cost, and simplified control method

Inactive Publication Date: 2011-04-27
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development cycle of special equipment and special rolling control model is long and the cost is high, which seriously limits the production and promotion of cold-rolled low-carbon, low-silicon, non-oriented electrical steel

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment

[0021] In the non-oriented electrical steel production line of a certain factory, the engineering test of cold-rolled low-carbon and low-silicon non-oriented electrical steel was carried out according to the hot rolling method of the present invention, and other processes except hot rolling were implemented according to existing requirements.

[0022] Specifically, the finishing rolling unit is a six-stand finishing rolling unit capable of six-pass finishing rolling, the temperature range of starting rolling is the same as the existing one, and the above-mentioned forced cooling is set between the penultimate pass and the penultimate pass. During the period, forced cooling is cooling water cooling.

[0023] Limited by the performance of specific equipment, in order to ensure that the starting rolling temperature meets the requirements and the processing capacity of each pass before the penultimate pass, and the slab can be directly cooled by forced cooling between the penultima...

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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 945 DEG C and a lower limit higher than 925 DEG C; and the plate blank is forcefully cooled between two adjacent passes in thefinishing step and has a rolling temperature higher than 945 DEG C in the prior pass and a rolling temperature lower than 925 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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C38/04C21D8/12
Inventor 李正荣李军刘勇李卫平李俊洪胡松涛董君
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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