抄録
In order to improve toughness and wear resistance of high speed steels, P/M high C high V high speed steels were investigated in this experiment. Modified SKH55 steel powders containing 1.08 to 3.56%C and 2.25 to 11.97%V were consolidated using hot isostatic press. It was found that a P/M steel containing under 10%V has transverse rupture strength of more than 350 kg/mm2. The wear characteristics of P/M steels were examined, rubbed against SNCM8, with the plate-disc type machine under unlubricated conditions. P/M high C high V high speed steels were found to have an excellent wear resistance. At 2.86 m/sec of sliding speed (adhesive wear zone), the wear rate decreased with increasing carbide content. While at 0.3m/sec of sliding speed (abrasive wear zone), the wear rate decreased linearly with increasing MC carbide content.
