BRIAN JOSEPH MCTIERNAN
Engineers in Sewickley, PA
License number
Pennsylvania PE060750
Category
Engineers
Type
Professional Engineer
Address
Address
Sewickley, PA 15143
Professional information
Maraging Steel Article And Method Of Manufacture
US Patent:
2007005, Mar 8, 2007
Filed:
Sep 6, 2005
Appl. No.:
11/218618
Inventors:
Joseph Muha - Pittsburgh PA, US
Andrzej Wojcieszynski - Pittsburgh PA, US
Brian McTiernan - Sewickley PA, US
Andrzej Wojcieszynski - Pittsburgh PA, US
Brian McTiernan - Sewickley PA, US
International Classification:
C22C 38/52
US Classification:
419029000, 419066000, 420107000
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.
Maraging Steel Article And Method Of Manufacture
US Patent:
2012023, Sep 13, 2012
Filed:
Feb 23, 2012
Appl. No.:
13/403368
Inventors:
Joseph F. MUHA - Pittsburgh PA, US
Andrzej L. WOJCIESZYNSKI - Pittsburgh PA, US
Brian J. MCTIERNAN - Sewickley 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
US Classification:
419 27, 419 29, 148335
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.