A method for preparing high silicon steel sheet by powder rolling

Abstract

The invention discloses a method for preparing high-silicon steel flakes by powder rolling, which belongs to the technical field of powder metallurgy. The invention adopts electrolytic iron powder and silicon powder covered by iron powder, and forms Fe-6.5wt.% Si mixed element powder after simple mixing by a v-shaped mixer. The green sheet is formed by powder rolling, sintered at high temperature to make it metallurgically bonded, hot-rolled to a certain thickness for multiple passes, then cold-rolled 2-4 times, and finally annealed at high temperature to obtain high-silicon steel with excellent properties Flakes. The powder rolling method can effectively shorten the technological process for preparing thin slices. The use of silicon powder coated with iron powder in the raw material greatly improves the formability of the powder system, avoiding the complexity of the process and subsequent degumming caused by the addition of forming agents. The problem of carbon residue has the advantages of simple operation, high production efficiency, high product precision, no pollution and inclusions, and excellent performance.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and relates to a method for preparing high-silicon steel flakes through powder rolling. Background technique [0002] Magnetic materials are mainly divided into two categories: permanent magnets and soft magnetic materials. Permanent magnetic materials are mainly used to provide stable magnetic fields, information storage, etc., and soft magnetic materials are mainly used for electric energy conversion and electromagnetic signal conversion in the power electronics industry. The remanence and coercivity of soft magnetic materials are very small, and they are easily magnetized repeatedly in a magnetic field. When the external magnetic field is removed, most or all of the obtained magnetism will be lost, so they have been widely used in electrical equipment and electronic equipment. The development of traditional soft magnetic materials has gone through the process from pure iron, silicon...

AI Technical Summary

Problems solved by technology

[0004] Although 6.5% Si silicon steel has excellent magnetic properties and wide application prospects, 6.5% Si high silicon steel is brittle in texture and poor in processability, making it difficult to prepare by conventional rolling methods, thus restricting its production and application

However, although the above methods avoid or solve the problem of difficult deformation of the alloy to a certain extent, they only stay in the laboratory research stage and are difficult to apply to industrial production.