The nanocrystalline rapidly quenched NdFeB magnet has great market potential and application prospect. It has been widely used in automobiles, computers, home appliances, medical care and household appliances.
At present, the evolution rules and mechanisms of nanocrystalline fast quenched NdFeB magnetic powder and bonded magnets in the process of preparation of fast quenched NdFeB magnetic powder and bonded magnets have been systematically studied. The innovative research results have been obtained.
(1) The magnetic properties of nanocrystalline fast quenched NdFeB magnetic powder are (BH) m=16.2MGO, through the integration of pure purification technology with micro calcium alloy removal and microporous foam ceramic filtration, the reduction of component segregation in thin plate ingot technology, improved induction or electro soliton remelting rapid quenching technology and dynamic crystallization process. E, Hd=8kOe, is similar to the similar products of MQ company of America.
(2) The bonded NdFeB permanent magnets with a density of 6.50 to 6.55g/cm3 are prepared by advanced technology of fast quenching NdFe magnetic powder preprocessing, uniform mixing, prepressing granulation, high density molding curing and surface coating. The magnetic properties of the permanent magnets are (BH) m=13.2MGOe and Hcj=8kOe, which are equivalent to those of the same kind abroad. It is at the advanced level of the world. The above research results have broken the monopoly status and technical blockade in the field of high performance fast quenching NdFeB magnetic powder and bonded NdFeB magnets in the United States and Japan, promoted the research and production level of the bonded NdFeB magnet industry in our country, and enhanced the core competitive ability of the international market of China's bonded NdFeB magnet products and micro motor and other related industries.