Method and device for producing alloy powder for permanent magnet

Abstract

The present invention relates to an alloy powder manufacturing process which can continuously and feasibly execute a series of procedures from hydrogen adsorbing to crushing and cooling. The present invention relates to a permanent magnet used alloy powder manufacturing device which crushes the raw material alloy block including rare earth element, metallic element, boron element to obtain the alloy powder and the making method thereof. The structure of the device is that a hydrogen adsorbing part, a heat treating part and a cooling part are arranged along the central axis in sequence, and atthe same time these components are combined into an integrated container. The integrated container can do positive rotation and inverse rotation. For example the hydrogen adsorbing part and the coolingpart respectively comprises a groove-shaped or pin-shaped spiral part, the spiral direction of each spiral part in the hydrogen adsorbing part and the cooling part is inversed to each other. The inne r circumferential surface of the heat treating part comprises a projecting part. The inlet side of the hydrogen adsorbing part of the integrated container is arranged with an air lead-in pipe and theoutlet side of the cooling part is arranged with an air discharging pipe, and the air lead-in pipe is arranged with a hydrogen supplying equipment and an inert gas supplying equipment. With these structures a serious of coarse crushing processes from hydrogen adsorbing to crushing and cooling can be continuously executed.

Description

technical field [0001] The present invention relates to an apparatus and method for producing alloy powder used in the production of permanent magnets such as rare earth sintered magnets. Specifically, it relates to a technique for effectively implementing a series of processes including hydrogen adsorption, pulverization, and cooling. Background technique [0002] For example, R-B-M types such as Nd-Fe-B (R is one or more rare earth elements including Y, M is an essential component of Fe and contains other metal elements) sintered magnets have good magnetic properties and as the main component Nd has the advantages of abundant resources and low price, so its demand has greatly increased recently. In view of this situation, research and development to improve the magnetic properties of R-B-M sintered magnets, and improvement of the manufacturing method for producing high-quality rare earth sintered magnets have been carried out. [0003] As a method of manufacturing rare ea...

AI Technical Summary

Problems solved by technology

In order to avoid this phenomenon, it is considered that it is better to expand the hydrogen adsorption area, but this will cause the enlargement of the device and the complexity of management.

[0011] In addition to the hydrogen adsorption process, the subsequent heat treatment process and cooling process are also performed separately, so it is very cumbersome

Patent Document 2 describes the continuous treatment of hydrogen adsorption process and heat treatment, but in terms of actual treatment, this document does not describe the effective and feasible composition of each process

Images