Iron-base alloy permanent magnet powder and method for producing the same
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United States of America Patent
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Nov 12, 2002
Grant Date -
Aug 23, 2001
app pub date -
Dec 13, 2000
filing date -
Dec 21, 1999
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Abstract
The method for producing iron-base alloy permanent magnet powder of the present invention includes the steps of: chilling an Fe--R--B molten alloy by melt quenching, thereby forming a rapidly solidified alloy having a thickness in a range of 80 .mu.m to 300 .mu.m; crystallizing the rapidly solidified alloy by heat treatment, thereby producing an alloy having permanent magnet properties; and pulverizing the alloy to produce powder having an average particle size in a range of 50 .mu.m to 300 .mu.m or less and a ratio of minor axis size to major axis size of powder particles in a range of 0.3 to 1.0.
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