Rare earth magnet and method for manufacturing the same
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United States of America Patent
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Issued Date -
May 8, 2003
app pub date -
Nov 13, 2002
filing date -
May 9, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The method for manufacturing alloy powder for R--Fe--B type rare earth magnets of the present invention includes 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. In the first pulverization step, the material alloy is pulverized by a hydrogen pulverization method. In the second pulverization step, easily oxidized super-fine powder (particle size: 1.0 .mu.m or less) is removed to adjust the particle quantity of the super-fine powder to 10% or less of the particle quantity of the entire powder.
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