Method for producing rare-earth permanent magnet high in Ce content through one-step heat treatment technology

Abstract

The invention discloses a method for producing a rare-earth permanent magnet high in Ce content through a one-step heat treatment technology. The mass percent general formula of the magnet is (Pr, Nd)xCey(Fe1-zMz)100-x-y-wBw, wherein M is one or more of Nb, V, Ti, Co, Cr, Mo, Mn, Ni, Ga, Zr, Ta, Ag, Au, Al, Pb, Cu and Si, 29<=x+y<=33, 1 / 4<=y / x<=3 / 2, 0.5<=z<=2, and 0.8<=w<=1.5. Based on the double main phase alloy technology, low temperature sintering is adopted, heat treatment is conducted only for one step, and then the rare-earth permanent magnet high in Ce content is produced. 60 by weight% Ce substitution amount can be achieved by using the method, the balanced use of rare-earth elements is promoted, the production processes are reduced, and the cost is effectively reduced.

Description

technical field

[0001] The invention relates to a method for producing rare earth permanent magnets with high Ce content by one-step heat treatment technology. Background technique

[0002] Sintered NdFeB magnet is currently the permanent magnet material with the strongest magnetism, the widest application and the most rare earth consumption. It is widely used in high-tech fields such as information, energy, medical care, transportation and national defense. It is the most important rare earth functional material and the national economy. key basic materials. As the world's largest exporter of rare earths, in recent years, it has carried out macro-control on the rare earth industry, implemented export quotas, levied and gradually raised export tariffs, strengthened environmental supervision, implemented protective mining of rare earth resources, and the era of cheap competition for rare earth products has passed. Rare earth prices have been rising all the way, and the globa...