Inventors:
Joseph F. MUHA - Pittsburgh PA, US
Andrzej L. WOJCIESZYNSKI - Pittsburgh PA, US
Brian J. MCTIERNAN - Sewickley PA, US
International Classification:
B32B 15/00, B22F 3/15, C22C 38/44, B22F 3/26
Abstract:
A fully dense, powder-metallurgy produced maraging steel alloy article of prealloyed powder for use as a tool for high temperature applications. The article in the as-produced condition having a hardness less than 40 HRC to provide machinability and thereafter the article upon maraging heat treatment having a hardness greater than 45 HRC. A method for producing this article comprises compacting prealloyed powder to produce a fully dense article having a hardness less than 40 HRC and thereafter maraging heat treating to a hardness greater than 45 HRC.