Ferro-cerium-based rapid quenching permanent magnet powder and preparation method of ferro-cerium-based rapid quenching permanent magnet powder

Abstract

The invention relates to ferro-cerium-based rapid quenching permanent magnet powder and a preparation method of the ferro-cerium-based rapid quenching permanent magnet powder. The alloy composition chemical formula of the ferro-cerium-based rapid quenching permanent magnet powder is [Ce100-x, Rex]aFe100-a-b-cBbTMc, wherein the x is the mass percent of the rare earth gross, the a, the b and the c show the mass percents of corresponding elements respectively, 0<=x<=50%, 27.5%<=a<=32%, 0.8%<=b<=1.5%, 0.5%<=c<=5%, the Re is one or more of Nd, Pr, Dy and Tb, and the TM is one or more of Ga, Co, Cu, Nb and Al. According to the preparation method, the ferro-cerium-based rapid quenching permanent magnet powder and Re'-Fe-B without Ce can be prepared with a water-cooling electromagnetic roller (a copper alloy roller or a molybdenum roller), and a ferro-cerium-based hot-pressing magnet with double hard magnetic principal phases or multiple hard magnetic principal phases can be prepared with the two kinds of magnetic powder. The ferro-cerium-based rapid quenching permanent magnet powder fills up blanks of middle-grade magnet powder and lower-grade magnet powder on the market at present, the product performance cost ratio is high, and the ferro-cerium-based rapid quenching permanent magnet powder and the preparation method are suitable for engineering production.

Description

technical field

[0001] The invention belongs to the technical field of rare earth permanent magnet materials, and in particular relates to a cerium-iron-based quick-quenching permanent magnet powder and a preparation method thereof. Background technique

[0002] The quick-quenching permanent magnet powder is the core material of the hot-pressed / thermo-rheological permanent magnet, which determines the performance of the magnet. The hot-pressed / thermo-rheological process has the characteristics of simplicity, low temperature, short time, and near-net forming, especially in the radiation orientation and It is unique in the preparation of multi-pole oriented magnetic rings and nano-two-phase composite magnets. The metal neodymium Nd in the current hot-pressed / thermo-rheological NdFeB magnets accounts for more than 90% of the cost of raw materials. With the increasing production of rare earth permanent magnets in the world in recent years, the use of a large amount of metal neo...

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