| 摘要 |
PROBLEM TO BE SOLVED: To provide an iron-base powdery mixture with which the machinability can be improved without bringing about the deterioration of mechanical characteristic of a sintered material. SOLUTION: In the iron-base powdery mixture mixing the iron-base powder, powder for alloy, powder for improving the machinability and further, lubricant, as the powder for improving the machinability, manganese sulfide powder and further, calcium phosphate powder and/or hydroxyapatite powder are added. The content of the powder for improving the machinability is made to be the total 0.1-1.0 mass% to the total content of the iron-base powder, powder for alloy and the powder for improving the machinability. The calcium phosphate powder is desirable to use one or more kinds selected among tricalcium phosphate, calcium hydrogen phosphate and calcium dihydrogen phosphate. Further, a part or the whole of the iron-base powder can be used as the iron-base powder applying a segregation-preventive treatment, in which the powder for alloy and/or the powder for improving the machinability, are stuck on the surface with a binder. COPYRIGHT: (C)2006,JPO&NCIPI
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