A process for improving the electromagnetic properties of ordinary grain-oriented silicon steel

Abstract

The invention provides a technical method for improving the electromagnetic property of ordinary oriented silicon steel, and the technical method is suitable for a manufacturing process of ordinary magnetic induction oriented silicon steel with manganese sulfide as the main inhibitor. According to the technical method, a normalizing procedure before acid pickling can be omitted. The economical manufacturing process includes the steps of smelting, blank casting, hot continuous rolling, flattening in a hot rolled coil cooling process, acid pickling, primary cold rolling, intermediate annealing,secondary cold rolling, surface treatment and MgO coating, high-temperature annealing, insulating layer coating and hot stretching flattening. According to a traditional technical process and technical control of ordinary oriented silicon steel, the coiled sheet residual heat after hot rolling production and traditional technical equipment for implementing sheet surface examination are used, corresponding technical method implementation is conducted, and the electromagnetic property and property percent of pass of ordinary oriented silicon steel products or the hit rate for higher grades whenproduct improvement is implemented are improved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a process method for improving the electromagnetic properties of ordinary oriented silicon steel. Background technique [0002] Cold-rolled grain-oriented electrical steel products are important metal functional soft magnetic materials for the development of the electric power industry, and are mainly used in the manufacture of iron cores for various types of power transmission and transformation transformers. [0003] Only a few large iron and steel complexes at home and abroad can carry out the production of the whole process and the whole process. It is one of the typical products of the metallurgical long process. Because of the difficulty of production and the complicated process, it is called "the jewel in the crown" of metallurgical products. [0004] Grain-oriented silicon steel can be divided into ordinary grain-oriented silicon steel products and high magnetic ind...

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Problems solved by technology

[0007] In the prior art, the patent CN201010597079.2 discloses "A Preparation Process for Ordinary Oriented Silicon Steel", which improves the performance by increasing the intermediate annealing temperature and increasing the reduction rate of the primary cold rolling, and the cost is relatively large; P. "Laser scribing (notching) technology in industrial applications" reported by RauscheP et al. mentions that laser scribing and notching can refine magnetic domains to improve performance, but in industrial applications, corresponding equipment needs to be added, which is costly and complicated.

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