Neodymium iron boron material and preparation method and application thereof

Abstract

The invention discloses a neodymium iron boron material, and a preparation method and application thereof. The preparation method of a neodymium-iron-boron alloy sheet comprises the steps that a liquid alloy liquid is poured on a ground cooling roller, and the liquid alloy liquid is cooled to form the neodymium-iron-boron alloy sheet, wherein the rotating speed of the cooling roller is 27-32 r / min, and the temperature of a cooling liquid in the cooling roller is -2 DEG C - 15 DEG C; and an air pipe is arranged above the cooling roller, and the cooling roller is subjected to air injection cooling through the air pipe. According to the preparation method of the neodymium-iron-boron alloy sheet, the coercivity can be effectively improved, and the prepared neodymium-iron-boron alloy sheet hasexcellent physical and chemical properties.

Description

technical field

[0001] The invention relates to a neodymium iron boron material, its preparation method and application. Background technique

[0002] When the total RE of NdFeB alloy sheet is less than 31.5%, the current method can reduce the reduction of coercive force to a certain extent, but in high-grade products, especially in RE≤30.5%, the current process is prone to coercive force deviation. low case.

[0003] Chinese patent CN201610650925.X discloses a preparation method of NdFeB alloy flakes. In the casting stage, the alloy is cast by controlling the temperature of the water entering the quenching roll at 17-19°C, and grinding the quenching roll. , alloy flakes with lower oxygen content and better crystal shape were obtained. However, the above methods still lead to low coercive force when preparing NdFeB alloy sheets with total rare earth RE<30.5%.

[0004] Chinese patent CN201710305563.5 also discloses a method for preparing Nd-Iron ore alloy flakes, which ...