Method for manufacturing high silicon electrical steel

Abstract

The invention discloses a method for manufacturing high-silicon silicon steel sheet, which relates to the technical field of silicon steel sheet production, and comprises the following steps: S1, taking mixed powder; S2, rolling the mixed powder for the first time; S3, carrying out the first rolled mixed powder First sintering; S4, second rolling; S5, electrostatic powder coating on the surface of the mixed powder rolled in the second rolling; S6, mixed powder after second sintering electrostatic powder coating; S7, finish rolling; S8, annealing treatment; The manufacturing method of the high-silicon silicon steel sheet disclosed in the invention adopts a segmented sintering process, and the phase of the obtained strip is a single iron-silicon solid solution, and the thickness of the strip can be controlled by rolling passes, and the strip after the initial sintering The material has good shear property and can be mechanically processed such as shearing and stamping. During the preparation process, due to the sintering effect and the solid solution of Si, the tensile strength of the strip increases gradually. At a frequency above 1kHz, The samples had relatively low core losses.

Description

technical field [0001] The invention relates to the technical field of silicon steel sheet production, in particular to a method for manufacturing a high-silicon silicon steel sheet. Background technique [0002] Silicon steel is mainly used as the iron core of various transformers and motors. With the rapid development of the electronic industry and automation level, transformers and motors are required to be used at high frequencies, which will lead to an exponential increase in iron loss and increased magnetostriction. The noise increases. In order to meet the requirements of high-frequency and inverter transformers for small iron loss, high magnetic permeability, and low magnetostriction, it is found that when the silicon content is 6.5%, the thinner the silicon steel sheet, the better the performance. Therefore Obtaining thin silicon steel sheets with a silicon content of 6.5% is the best choice, but the silicon content of ordinary silicon steel sheets is only 1 to 3%, ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect of poor comprehensive performance of the silicon steel sheet processed by the traditional method, and design a manufacturing method of the high-silicon silicon steel sheet. Stamping and other mechanical processing, the tensile strength of the strip is high, and the core loss is low

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