Rare earth magnet and method for manufacturing the same

CAFC
  • US 6,537,385 B2
  • Filed: 07/09/2002
  • Issued: 03/25/2003
  • Est. Priority Date: 05/09/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for manufacturing alloy powder for R—

  • Fe—

    B rare earth magnets, comprising a first pulverization step of coarsely pulverizing an R—

    Fe—

    B alloy for rare earth magnets produced by a rapid cooling method and a second pulverization step of finely pulverizing the material alloy,wherein said second pulverization step comprises a step of removing at least part of the powder in which the concentration of rare earth element is greater than the average concentration of rare earth element contained in the entire powder.

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