| 摘要 |
PROBLEM TO BE SOLVED: To provide an iron-based powder mixture for powder metallurgy that excels in fluidity as powder, giving a green compact whose withdrawal from a metal mold is easier than in the prior art, the obtained green compact having a density stabilized and enhanced as compared with that of the prior art. SOLUTION: The iron-based powder mixture for powder metallurgy can be produced by a process comprising adding a free lubricant to an iron-based powder and mixing them, wherein the free lubricant has a particle diameter of≤200μm and a crush strength, as measured with respect to particles of average diameter, of 0.2 to 2 MPa and wherein the free lubricant is contained in an amount of 0.1 to 1 mass pts. per 100 mass pts. of iron-based powder. At this time, as the free lubricant, the one obtained by being subjected to granulation by fusion spraying is preferably used. COPYRIGHT: (C)2006,JPO&NCIPI
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