| 摘要 |
PROBLEM TO BE SOLVED: To provide an iron-base mixed powder which improves machinability of a sintered compact without causing degradation of the mechanical properties. SOLUTION: In a process of mixing a powder for an alloy, a powder for improving machinability and a lubricant with the iron-base powder, this iron- base mixed powder is characterized by employing a hydroxyapatite powder with or without a calcium fluoride powder as the powder for improving machinability, and including the amount of 0.02-0.40 mass% in total in Ca terms, with respect to the total quantity of the iron-based powder, the powder for the alloy and the powder for improving machinability. The hydroxyapatite powder preferably consists of crystallites having the sizes controlled to be larger than 200Å, preferably larger than 400Å, and further preferably larger than 600Å. COPYRIGHT: (C)2003,JPO
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