Abstract
This study is aimed to investigate the wear resistance of high speed steel made from atomized powders. The specimens for wear test were prepared by canning extrusion of the SKH9 steel powders with or without various kinds of carbide or nitride powders. Wear tests were, also, carried out for commercial forged SKH9 steel and commercial isostatically compressed SKH9 steel made from atomized powders. The results are summarized as follows:
1) At high sliding speed, the high speed steel made from powders shows better wear resistance than the forged high speed steel. But at low sliding speed, no significant differences are found between them.
2) Addition of TiC, WC, TiN or AlN increases wear resistance of high speed steel at both high and low sliding speeds.
3) Especially, TiC and TiN are very effective in improving wear resistance.
