Rare earth permanent magnet material recycled from waste and preparation method thereof

Abstract

The invention provides a rare earth permanent magnet material utilizing recycled waste materials. An alloy material is high in coercivity. The preparation method is simple in process, low in production cost and suitable for industrial production. The permanent magnet material comprises the following components in percentage by mass: 18-22% of Nd, 7.2-8.8% of Y, 3.6-4.4% of Eu, 3.6-4.4% of Dy, 2-6% of B, 0.1-0.5% of P, 0.15-0.20% of Ag, 0.45-0.60% of Ni, 0.01-0.04% of Si, 0.45-0.60% of Ti and the balance of Fe; the mass ratio of Nd to Y to Eu to Dy in the permanent magnet material is 10:4:2:2; and the permanent magnet material also comprises 0.045-0.060% of N in percentage by mass.

Description

technical field

[0001] The invention belongs to the field of metal materials, and relates to a rare earth permanent magnet material recycled from scraps and a preparation method thereof. Background technique

[0002] CN201410725480.8 application relates to a preparation method of rare earth permanent magnet material, the preparation method includes the following steps: respectively provide Re-Fe-B quenching powder and Ce-based quenching powder, wherein the Re-Fe-B quenching The rare earth Re in the powder is one or more of Nd, Pr, Dy, Tb, and the chemical formula of the Ce-based quenching powder is Ce x Fe (100-x-y-z) B y m z , M is selected from one or more of Ga, Co, Al, Zn, Cu, Nb and Zr, x, y and z are the mass percentages of the corresponding elements, and 28%≤x≤35%, 0.8% ≤y≤1.5%, 0%≤z≤2%; uniformly mix the Ce-based quenching powder with the Re-Fe-B quenching powder to obtain a mixed magnetic powder, wherein the Ce in the mixed magnetic powder The mass percentage o...

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