Patent ID: 6491765
Filing Date: 2002-12-10
Classification: B82Y,H01F

Abstract:
A method for manufacturing alloy powder for Râ€”Feâ€”B rare earth magnets, comprising a first pulverization step of coarsely pulverizing a material alloy for rare earth magnets and a second pulverization step of finely pulverizing the material alloy,wherein said first pulverization step comprises a step of pulverizing the material alloy by a hydrogen pulverization method, and said second pulverization step comprises a step of removing at least part of fine powder having a particle size of 1.0 &mgr;m or less to adjust the particle quantity of the fine powder having a particle size of 1.0 &mgr;m or less to 10% or less of the particle quantity of the entire powder.