抄録
The injection characteristics and the sintering behaviors of binary mixture of stainless steel powders having diffrent particle sizes were investigated. Two types of SUS316L powder, the higher-pressure water atomized powder (SF, d=9.72μm)and the gas atomized powder(GA, d-25μm)were used. The results obtained were as follows.
1)With decreasing the SF/GA ratio, the amount of required binder for injection molding could be diminished and the apparent density of molded compacts increased.
2)Sinterability of the molded compacts markedly increased with increasing the SF/GA ratio, while the increase of the ratio tended to result excessive grain growth when sintered at temperature above 1250°C. 3)Injection molded compacts showed uniformly distributed fine spheroidized pore structures as compared to those of die pressed compacts, after sintering.
