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

A technology of oriented electrical steel, low-carbon and low-silicon, applied in metal rolling, temperature control, etc., can solve the problems of high cost, long development cycle, restrictions on the production and promotion of cold-rolled low-carbon, low-silicon non-oriented electrical steel, etc. Achieve the effect of stable rolling state, ensure electromagnetic properties, and meet the requirements of grain size and texture

Inactive Publication Date: 2011-07-06
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Abstract
  • Description
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  • 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-rolled low-carbon low-silicon non-oriented electrical steel

Examples

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 manufacturing method of cold-rolled non-oriented electrical steel, in particular to a hot rolling method of cold-rolled low-carbon low-silicon non-oriented electrical steel, which comprises the steps of finish rolling and reeling after finish rolling; the plate blank is rolled for at least three passes at the finish rolling process; the upper limit of the temperature ranges of two phase areas of austenite and ferrite of the plate blank is lower than 945 DEG C, and the lower limit thereof is higher than 925 DEG C; the rolling temperature of the first pass in the three continuous passes of the finish rolling of the plate blank is higher than 945 DEG C, the second pass does not conduct rolling, the rolling temperature of the third pass is lower than 925 DEG C, and the plate blank is cooled forcibly between the first and the third passes in the three continuous passes. The hot rolling method leads a common finishing mill group to be applicable for the productionof the cold-rolled low-carbon low-silicon non-oriented electrical steel, simplifies the control method, reduces the production cost, and is beneficial to the production and promotion of the cold-rolled low-carbon low-silicon 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): B21B1/22B21B37/74C22C38/06
Inventor 李正荣李军刘勇李卫平尤秀妆
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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