Method for preparing high-silicon steel sheet through powder rolling

Abstract

The invention discloses a method for preparing a high-silicon steel sheet through powder rolling, and belongs to the technical field of powder metallurgy. The method comprises the following steps thatelectrolytic iron powder and silicon powder coated with iron powder are adopted, the raw materials are simply mixed through a v-shaped mixer to form Fe-6.5wt.%Si. A green sheet is formed through a powder rolling method, is subjected to high-temperature sintering so as to be subjected to metallurgical bonding, and is subjected to multi-pass hot rolling to a certain thickness and then is subjectedto cold rolling for 2-4 times, and finally annealing is carried out at a high temperature to obtain the high-silicon steel sheet with excellent performance. By adopting the powder rolling method, theprocess flow for preparing the sheet can be effectively shortened, the formability of a powder system is greatly improved by adopting the silicon powder coated with the iron powder in raw materials, so that the process complexity and the subsequent debinding residual carbon problem caused by addition of a forming agent are avoided, and the method has the advantages of being simple to operate, highin production efficiency, high in product precision, free of pollution and included foreign materials, excellent in performance and the like.

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.