Method for alloying Ga element through neodymium-iron-boron permanent magnet material

Abstract

The invention relates to a method for alloying a Ga element through a neodymium-iron-boron permanent magnet material, and belongs to the field of rear earth permanent magnet materials. The method can be used for smelting an alloy by utilizing a Fe-Ga alloy as a raw material with other neodymium-iron-boron raw materials together. The method comprises the following steps: smelting the Fe-Ga alloy and other neodymium-iron-boron raw materials together, then carrying out powder preparation, oriented pressing, sintering and tempering heat treatment to obtain a product. Because the melting point of metal Ga is about 30 DEG C, the metal Ga easily forms a liquid state at normal temperature, and if the metal Ga is taken as the raw material, the metal Ga generally needs to be enclosed into a Fe or Nd block through punching when a neodymium-iron-boron alloy ingredient is smelted. According to the method, the melting point of the Fe-Ga alloy is far higher than normal temperature, the Ga element is added in the form of the Fe-Ga alloy, so that the step of enclosing the metal Ga into the Fe-or Nd block through the punching can be completely omitted, the volatilization of the Ga element in a smelting process can be greatly reduced, the utilization rate of Ga is enhanced, and further higher magnet property is obtained. The method disclosed by the invention can effectively utilize the waste product obtained in the production of the magnetostrictive material Fe-Ga alloy and is easy to operate and suitable for industrial production.

Description

technical field

[0001] The invention belongs to the field of rare earth permanent magnet materials, and in particular provides a method for alloying Ga elements with NdFeB permanent magnet materials. technical background

[0002] NdFeB permanent magnets are widely used in electronics, automobiles, computers, electric power, machinery, energy, environmental protection, national defense, Medical equipment and many other fields. In recent years, my country's NdFeB manufacturing technology has made remarkable progress, permanent magnet equipment has been continuously developed and improved, new technologies have been adopted, and product grades have been rapidly improved. For example, the traditional ingot casting technology is changed to the scale ingot casting technology SC which is nearly rapidly cooled and solidified; the hydrogen broken HD and the improved jet mill JM powder making technology are used to make the powder particles finer and have a narrower size distribution...

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