| 简介 |
PROBLEM TO BE SOLVED : To provide a method of efficiently deoiling and sintering a rare earth permanent magnet compact formed by a wet forming method. SOLUTION : In the process of forming the rare earth permanent magnet, an R-Fe-B (R is not less than a kind of rare earth element including Y) base permanent magnet coarse powder is pulverized in the gas flow of N2or Ar that contains oxygen of ≤0.01%. Fine powder obtained is collected in a mineral oil belonging to the fourth second petroleum having inflammation point of ≥21°C and COPYRIGHT : (C)2008, JPO&INPIT |
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