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Method for production of non-oriented electrical steel

A technology of oriented electrical steel and production methods, applied in the direction of metal rolling, etc., can solve the problems affecting the smooth progress of the cold rolling process, transverse cracks on the surface of the cast strip, poor plasticity, etc., to reduce internal defects, promote aggregation and growth, Effect of improving toughness and magnetic properties

Inactive Publication Date: 2003-12-31
BAOSHAN IRON & STEEL CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0006] The defect of this method is that, since about 100Kg / mm2 pressure is added on the crystallization roller, although the crystal defects are reduced and the toughness is improved, the temperature of the cast strip just solidified is at least above 1400°C, the strength is low, and the plasticity is extremely poor, which improves the casting and rolling process. It is easy to produce transverse cracks on the surface of the cast strip, which will affect the smooth progress of the subsequent cold rolling process

Method used

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  • Method for production of non-oriented electrical steel
  • Method for production of non-oriented electrical steel
  • Method for production of non-oriented electrical steel

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Embodiment

[0048] The composition of non-oriented silicon steel is shown in Table 1. The starting temperature of hot rolling is 800°C for Examples 1 and 2, 900°C for Example 3, and 1000°C for Examples 4, 5, 6, and 7; the coiling temperature is 700°C, Among them, embodiment 1 and embodiment 2 are 560°C; cold-rolled plate thickness is 0.5mm; heat treatment system is as follows: embodiment 1 is 800°C×10s, embodiment 2 is 860°C×30s+900°C×20s, and the remaining samples are 860°C×30s+1050°C×20s. The magnetic properties and hot rolling reduction of the electrical steel produced by the method of the present invention are shown in Table 2, and the finished product structure is shown in Table 2. Figure 4 .

[0049] Element

[0050] hot rolling

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Abstract

The present invention is the double-roller thin belt continuous casting process of producing non-oriented electrical steel. Molten steel containing silicon in 0-3.5 % is made to pass through two crystallizing rollers to form coagulated shell and led out the crystallizing rollers to form cast belt; and the belt is hot rolled in a hot milling roll at 800-1000 deg.c to produce a hot rolling deformation of 5-25 % and wound. The simple technological process can produce high performance non-oriented electrical steel effectively.

Description

technical field [0001] The invention relates to a method for producing non-oriented electrical steel, in particular to a method for producing non-oriented electrical steel by twin-roll strip continuous casting. Background technique [0002] Non-oriented electrical steel sheet is the main core material for motors, and the usual production process is as follows: figure 1 and figure 2 shown. The existing non-oriented electrical steel process has problems such as large equipment investment, complicated process, large energy consumption, and large environmental load. [0003] In order to improve the efficiency of the motor, it is hoped that the iron loss of non-oriented electrical steel is low and the magnetic induction is high; in order to reduce the iron loss of non-oriented electrical steel, it is usually used to increase the purity of molten steel, increase the content of Si and Al, increase the annealing temperature and prolong the annealing time, etc. However, as the ir...

Claims

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Application Information

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IPC IPC(8): B21B1/46B22D11/06C21D8/02C21D8/12
Inventor 甘青松杨春媚丁培道
Owner BAOSHAN IRON & STEEL CO LTD
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