抄録
High speed steel and low-alloyed steel were bonded by powder sintering processes in order to investigate the effects of carbon content of high speed steel and sintering temperature on the bonding behavior. Two type bonding methods were studied: (1) high speed steel and low-alloyed steel compacts were bonded by sintering without bonding pressure, (2) two-layer powder of the steels compacted and then sintered. The density, microstructure and four-point bending rupture strength of the bonded specimens were examined. It was found that the sintered temperature at which the bonded specimens of two compacts showed the highest rupture strength was 20 K higher than the temperature at which sintered high speed steel specimens showed the highest rupture strength, and that there was no significant influence of carbon content and sintering temperature on the rupture strength for the specimens bonded by two-layer powder compacting.
