オーステナイト系ステンレス鋼粉の固相急速焼結

抄録

Austenite type stainless steel powders (SUS304L) with rapid solid sintering were investigated by condition of heating rate 10K/s constant. The sintering was at a constant temperature of 1573K and holding time changes from 60s to 360s. The cooling methods were done by 2 different types: cool in N₂ gas and furnace cool. Sintered specimens were evaluated on each mechanical property. As a result, radial crashing strength was obtained almost the same values when holding time is over 300s compared with continuous furnace sintering condition. And, influence of cooling method (cool in N₂ gas or furnace cool) was not observed. Dimensional change ratio gained good values compared by liquid sintering. The values were maxima as 1.5% contraction ratios for both outside and inside direction. In this experiment, rapid solid sintering was able to be finished only for 490s.