Super-hard powder metal tool steel

摘要

Metal cutting/shaping tools such as hobs, forming tools, and rolls have been made in recent years from either high speed steel or cemented tungsten carbide. The tool steels have included both conventional and P/M versions of AISI M2, M4, M42, and T15. Each of these grades has provided an increasing level of hardness and wear resistance, but still not enough for today's most demanding tooling requirements or longer production runs.