Abstract
The effect of systematic variation in nitrogen and/or carbon content upon the properties of cutting tool materials were investigated for JIS SKH 10 series high-speed steels (0.6 to 1.5%C, 0 to 1.0%N, 4%Cr, 12%W, 5%V and 5%Co). These steels were produced by using gas atomized powders and HIP processing.
The following results were obtained in this study.
1) Effect of nitrogen on incipient melting temperature is greater than that of carbon. Compared with JIS SKH51 series, effect of nitrogen is larger and incipient melting temperature decreases about 4°C with increasing 0.1%N.
2) Bend strength increases with replacement of carbon by nitrogen.
3) From the result of Ohogoshi's wear test, improvement of adhesive wear resistance was found on the steel with more than 0.4%N.
