Method for preparing high-performance biphase rare-earth permanent magnet material using hydrogenation heat treatment process

Abstract

The invention discloses a preparing method of high-performance double-phase, rare-earth, permanent magnetic material by hydrogenation thermal treatment. Firstly, it adopts vacuum welting method to prepare alloy; secondly, adopts fast quenching method or mechanical alloying method to prepare prealloy powder; then, places the prealloy powder in a hydrogen processing device, vacuumize the device and charges in hydrogen for hydrogen absorption and dehydrogenation reactions at 600-1000 deg.C; and finally, adopts adhesion process, cold press process, and thermal press or thermal stress process to prepare an alloyed magnet. It has better synthetic permanent magnetic performance, and its producing device and process are simple, and the consumption of process is low.

Description

technical field

[0001] The invention relates to a method for preparing a high-performance dual-phase rare earth permanent magnet material by a hydrogenation heat treatment method. Background technique

[0002] Rare earth bonded magnet is a magnetic material made of magnetic rare earth alloy powder bonded with organic or soft metal binder. Rare earth bonded magnets have a high performance-price ratio, can be directly formed or processed into components with complex shapes, have high toughness, are not easy to break, crack, and have small deviations in magnetic properties, which meet the high performance requirements of magnetic materials in recent years. The requirements of globalization and low price, so its total sales can grow rapidly. The magnetic properties of rare earth bonded magnets are affected by the properties of the magnetic powder and the bonding density, among which the magnetic properties of the powder are considered to be the first f...