| 摘要 |
PURPOSE:To manufacture a sintered austenitic stainless steel article having superior corrosion resistance and low porosity by mixing austenitic stainless steel powder with a specified amount of Fe-P powder, compacting the powdery mixture and sintering it in a reducing atmosphere or in vacuum. CONSTITUTION:Austenitic stainless steel powder is mixed with Fe-P powder contg. 25.8% P so that the powdery mixture contains 0.2-1.0wt% P. The powdery mixture is compacted to a prescribed shape and sintered in two steps in an atmosphere to a reducing gas such as hydrogen or in vacuum at 1,000-1,045 deg.C which is below the eutectic point of the Fe-P and at 1,200-1,400 deg.C which is above the eutectic point of the Fe-P. A liq. phase is produced during the sintering by the presence of the Fe-P as a low m.p. alloy, causing thermal shrinkage and a sintered austenitic stainless steel article having superior corrosion resistance and <=7% porosity is obtd.
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