A method for producing high-grade electrical steel products with low cost and high efficiency

A technology for high-grade steel products, applied in the field of low-cost and high-efficiency production of high-grade electrical steel products, can solve the problems of increased roll preparation and auxiliary processing workload, large consumption of shot blasting material and pickling, and large production consumption. , to achieve the effect of reducing roll consumption and preparation, reducing production consumption and realizing reuse

Active Publication Date: 2019-06-28
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of high-grade electrical steel products, the hot-rolled coils need to be processed by normalization, shot blasting, pickling, rolling and other processes. The process is long and the production consumption is large; especially after normalization, the high-silicon steel strip The dense and highly cohesive silicon-containing or silicon oxide scale on the surface needs further treatment. Shot blasting is often used to break the surface iron scale, and sufficient pickling is used to ensure the surface quality of the strip, resulting in consumption of shot blasting materials and pickling. Huge; in order to meet the specifications of the finished product, it is necessary to use a large-roughness roll for the first pass of aging rolling in the subsequent rolling process, and finally use the corresponding smooth roll according to the surface quality requirements of the finished product, resulting in roll preparation and processing. An increase in the amount of auxiliary work

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take the production of non-oriented silicon steel containing 2.8% silicon as an example.

[0029] The 11-roller straightening machine is used, the roughness of the straightening rollers is controlled at 25 μm, the tensile elongation is controlled at 3.5%, and the measured surface roughness of the steel strip is 1.85 μm.

[0030] The surface quality of the steel strip after pickling is good. During cold rolling, the finished pass roll with a roughness of 0.86 μm is used for the first pass, and the rolling process is stable, reaching the level of the roll surface with a large roughness ( 2.0μm or more) roll rolling effect and control requirements.

[0031] In this embodiment, 1.8 kg / t of shot blasting material consumption is saved; roll consumption is reduced by more than 50%.

Embodiment 2

[0033] Take the production of non-oriented silicon steel containing 3.0% silicon as an example.

[0034] The 11-roller straightening machine is used, the roughness of the straightening rollers is controlled to 21 μm, the tensile elongation is controlled to 2.5%, and the measured surface roughness of the steel strip is 1.95 μm.

[0035] The surface quality of the steel strip after pickling is good. During cold rolling, the finished pass roll with a roughness of 1.2 μm is used for the first pass. 2.0μm or more) roll rolling effect and control requirements.

[0036] In this embodiment, 2.0 kg / t of shot blasting material consumption is saved, and roll consumption is reduced by more than 50%.

Embodiment 3

[0038] Take the production of non-oriented silicon steel containing 3.3% silicon as an example.

[0039] The 11-roller straightening machine is used, the roughness of the straightening rollers is controlled to 15 μm, the tensile elongation is controlled to 2.5%, and the measured surface roughness of the steel strip is 2.50 μm.

[0040] The surface quality of the steel strip after pickling is good. During cold rolling, the finished pass roll with a roughness of 1.3 μm is used for the first pass, and the rolling process is stable. 2.0μm or more) roll rolling effect and control requirements.

[0041] In this embodiment, 2.2kg / t of shot blasting material consumption is saved; roll consumption is reduced by more than 50%.

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Abstract

The invention relates to a method for low-cost high-efficiency production of a high-grade electrical steel product. The method comprises the following steps: 1) arranging a multi-roller straightener after a normalizing annealing procedure, wherein straightening rollers employs large-roughness roller surfaces; 2) controlling the elongation percentage of a high-grade electrical steel band to be 0.5to 10%; 3) controlling the surface roughness of the steel band to be 1.0 to 4.0 [mu]m; 4) carrying out primary rolling pass with a final-pass roller having a roughness meeting requirements; and 5) after rolling, transferring the high-grade electrical steel band to a subsequent heat treatment procedure for a finished product. According to the invention, multi-roller straightening is used for replacing shot blasting; the surface of the high-grade electrical steel band is repeatedly bent and stretched by the multi-roller straightener, so scale is fully fragmented; a concave-convex surface can increase the acid leaching area during pickling and allows rolling effect of large-roughness rollers to be achieved, so requirements on initial-pass aged rolling are totally met; and the final-pass roller with appropriate surface roughness is used as a primary-pass roller during primary-pass rolling, so consumption in production is lowered, and process flow is shortened.

Description

technical field [0001] The invention relates to the technical field of electrical steel production, in particular to a method for producing high-grade electrical steel products with low cost and high efficiency. Background technique [0002] High-grade electrical steel products are widely used in the manufacture of high-end, precision, and sharp-point motors and iron cores for instruments and meters. They are important metal functional soft magnetic materials. In the production process of high-grade electrical steel products, the hot-rolled coils need to be processed by normalization, shot blasting, pickling, rolling and other processes. The process is long and the production consumption is large; especially after normalization, the high-silicon steel strip The dense and highly cohesive silicon-containing or silicon oxide scale on the surface needs further treatment. Shot blasting is often used to break the surface iron scale, and sufficient pickling is used to ensure the su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12
CPCY02P10/20
Inventor 高振宇陈春梅赵健胡洪旭王玉琦李亚东张智义马云龙朱丽君孟祥权
Owner ANGANG STEEL CO LTD
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