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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, and can solve the problem of long development cycle, high cost and limitation of cold-rolled low-carbon, low-silicon, non-oriented electrical steel Production, promotion and other issues to achieve the effect of ensuring electromagnetic performance, stable rolling state, and meeting the requirements of grain size and texture

Inactive Publication Date: 2011-04-13
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, its finishing rolling unit is a six-stand finishing rolling unit capable of achieving six passes of finishing rolling, and the temperature range of starting rolling is the same as that of the existing ones. The above three consecutive passes are respectively the fourth from last, third from last and last In the second pass, the forced cooling is cooled by cooling water.

[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 for...

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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 three passes of rolling are carried out on a plate blank in the finishing step; two phase regions of the austenite and the ferrite of 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 has a rolling temperature higher than 900 DEG C in the first pass, no temperature in the second pass and a rolling temperature lower than 850 DEG C in the third pass of the three continuous passes in the finishing step and is forcefully cooled between the first pass and the third pass of the three continuous passes. 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): C21D8/12C22C38/06C22C38/04
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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