发明名称 PROCESS FOR PRODUCING RARE EARTH PERMANENT MAGNET AND METHOD FOR MIXING MATERIAL POWDER AND LUBRICANT
摘要 PROBLEM TO BE SOLVED: To provide a process for producing a rare earth permanent magnet in which even a smaller quantity of lubricant added can exhibit the effect as a lubricant sufficiently. SOLUTION: The process for producing an R-T-B (R: one kind or more than one kind of rare earth elements, T: Co and/or Fe, B: boron) based rare earth permanent magnet comprises a step for pulverizing a material alloy roughly, a step for adding lubricant to roughly pulverized powder produced in the rough pulverization step, a step for pulverizing the roughly pulverized powder added with lubricant finely, a step for stirring the mixture of finely pulverized powder and lubricant produced in the fine pulverization step in a temperature zone between 30°C and melting point of the lubricant, a step for shaping the finely pulverized powder passed through the mixing step in a magnetic field, and a step for sintering the compact obtained in the shaping step. COPYRIGHT: (C)2007,JPO&INPIT
申请公布号 JP2006310786(A) 申请公布日期 2006.11.09
申请号 JP20060063254 申请日期 2006.03.08
申请人 TDK CORP 发明人 ISHIZAKA TSUTOMU;NISHIZAWA KOICHI;SAKAMOTO TOKUJI
分类号 H01F41/02;B22F9/04;C22C33/02;C22C38/00 主分类号 H01F41/02
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