Short-process manufacturing method of cold rolling non-oriented high-silicon steel sheet

Abstract

The invention belongs to the field of manufacture of an electrical steel sheet, and particularly relates to a short-process manufacturing method of a cold rolling non-oriented high-silicon steel sheet. The short-process manufacturing method comprises the following steps: firstly smelting molten steel which meets the requirements of chemical components of high-silicon steel; then pouring the molten steel into a tundish, carrying out crystallizing roller cast rolling to lead a non-oriented thin high-silicon steel strip out, and carrying out hot rolling on the thin high-silicon steel strip to obtain a hot rolling plate; cooling the hot rolling plate to 150-300 DEG C for warm rolling to obtain a high-silicon steel warm rolling plate; pickling to remove iron oxide scale positioned on a surface, and carrying out cold rolling at 50-100 DEG C to obtain a high-silicon steel cold rolling plate with the thickness of 0.2-0.35 mm; annealing the high-silicon steel cold rolling plate in a hydrogen atmosphere to obtain the cold rolling non-oriented high-silicon steel sheet with 6.5% by weight of Si. According to the technical scheme, a method which combines the cast rolling, the hot rolling, the warm rolling and the cold rolling is adopted; the adopted warm rolling is low in temperature, so that the problem of bad warm rolling plate shape caused by thermal crown is prevented; and especially, the problem of poor surface quality is solved by adopting the cold rolling, so that a thin-specification non-oriented high-silicon steel sheet product with good plate shape and excellent surface quality is easy to manufacture.

Description

technical field [0001] The invention belongs to the field of electrical steel plate manufacturing, in particular to a short-process manufacturing method of cold-rolled non-oriented high-silicon steel sheet. Background technique [0002] As an important soft magnetic material, non-oriented electrical steel is the core component of electrical components such as motors, transformers and magnetic shielding. Compared with conventional ~3wt.% Si non-oriented electrical steel, when the silicon content of non-oriented electrical steel increases to 6.5.wt%, its comprehensive magnetic properties will be greatly improved, which is manifested as extremely low mid-high frequency iron loss, which is close to With zero saturation magnetostriction, high magnetic permeability and low coercive force, it is an ideal core material for making low-noise, low-iron-loss transformers and motors, and is also the first choice for high-frequency electronic components. It has broad market prospects, eve...

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Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a short-process manufacturing method of cold-rolled non-oriented high-silicon steel sheet, with the purpose of solving the problem of complex production process, many manufacturing processes, high equipment requirements, and large energy consumption of high-silicon steel sheet. , large environmental load and deterioration of product surface quality

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