LOW-B RARE EARTH MAGNET

摘要

The present invention discloses a low-B rare earth magnet. The rare earth magnet contains a main phase of R2T14B and comprises the following raw material components: 13.5 at %˜4.5 at % of R, 5.2 at %˜5.8 at % of B, 0.3 at %˜0.8 at % of Cu, 0.3 at %˜3 at % of Co, and the balance being T and inevitable impurities, the R being at least one rare earth element comprising Nd, and the T being an element mainly comprising Fe. 0.3˜0.8 at % of Cu and an appropriate amount of Co are co-added into the rare earth magnet, so that three Cu-rich phases formed in the grain boundary, and the magnetic effect of the three Cu-rich phases existing in the grain boundary and the solution of the problem of insufficient B in the grain boundary can obviously improve the squareness and heat-resistance of the magnet.

主权项

1. A low-B rare earth magnet, the rare earth magnet contains a main phase of R2T14B and comprises the following raw material components:
13.5 at %˜14.5 at % of R, 5.2 at %˜5.8 at % of B, 0.3 at %˜0.8 at % of Cu, 0.3 at %˜3 at % of Co, and the balance being T and inevitable impurities, the R being at least one rare earth element comprising Nd, and the T being an element mainly comprising Fe.