Production method for non-oriented electrical steel product with excellent longitudinal electromagnetic properties

Abstract

The invention relates to a production method for a non-oriented electrical steel product with excellent longitudinal electromagnetic properties. The production method comprises the following steps: 1)determining the thickness of a hot-rolling raw material according to the specification of a finished product, wherein the overall reduction rate of cold rolling is a large reduction rate in a range of 86 to 95%; 2) increasing the furnace-entering tension of a steel band and controlling the elongation percentage of a cold-rolled steel band to be 0.50 to 5.00%; 3) increasing the tension control ofthe heating section of an annealing furnace during heat treatment and controlling the reduction of the width of a steel band at an outlet to be 2 to 10 mm; and 4) adjusting the length and rapid heating rate of the heating section of the annealing furnace and controlling the heating rate to be 400 to 850 DEG C/min. The production method provided by the invention employs the principles of materialsscience, is based on conventional processes, controls the reduction rate of cold rolling, fully takes the influence of steel band stress on microscopic texture and structure into consideration and controls recrystallization during heat treatment of the product, and thus, the non-oriented electrical steel product with excellent longitudinal electromagnetic properties is eventually produced.

Description

technical field [0001] The invention relates to the technical field of cold-rolled silicon steel, in particular to a production method of a non-oriented electrical steel product with excellent longitudinal electromagnetic properties. Background technique [0002] Cold-rolled non-oriented electrical steel products are important metal functional soft magnetic materials, which are widely used in the manufacture of stator and rotor cores of large, medium, small and micro motors. However, in the manufacture of iron cores in special industries such as instruments and meters, inductors and reactors, in view of the process requirements, high-grade non-oriented electrical steel thin strip products with excellent longitudinal electromagnetic properties are often required to control the overall core loss while improving Directional magnetic properties. [0003] At present, in the production of conventional non-oriented silicon steel, the reduction rate of cold rolling is usually contr...

AI Technical Summary

Problems solved by technology

However, the longitudinal electromagnetic properties of non-oriented electrical steel products produced by the above methods often cannot meet the requirements of use.

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