Method for producing neodymium-iron-boron rare earth permanent magnetic device
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United States of America Patent
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Feb 28, 2017
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Sep 3, 2015
app pub date -
Sep 29, 2013
filing date -
May 5, 2013
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Abstract
A method for producing neodymium-iron-boron rare earth permanent magnetic materials mainly comprises processes of: alloy smelting, coarsely pulverization, milling, magnetic compaction, sintering, machining, vacuum heat treatment, and etc. Magnetic performance of permanent magnetic devices is increased by improving technologies of hydrogen pulverization, milling by jet mill, and vacuum heat treatment, in such a manner that usage amount of rare earth is decreased. The present invention is applicable in producing rare earth permanent magnetic materials having high performance.
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