Method for producing powder metal compositions for wear and temperature resistance applications and method of producing same

US10124411B2 · kind B2 · utility

Assignees

• Federal-Mogul LLC · US
• la Corporation de l'École Polytechnique de Montréal · CA

Inventors

• Philippe Beaulieu · Thurso, CA
• Denis B. Christopherson, JR. · Waupun, US
• Leslie John Farthing · Rugby, GB
• Todd Schoenwetter · Beaver Dam, US
• Gilles L'Esperance · Candiac, CA

Key dates

• Filing date: Sep 16, 2015
• Grant date: Nov 13, 2018
• Expiry date: Dec 19, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A powder metal composition for high wear and temperature applications is made by atomizing a melted iron based alloy including 3.0 to 7.0 wt. % carbon; 10.0 to 25.0 wt. % chromium; 1.0 to 5.0 wt. % tungsten; 3.5 to 7.0 wt. % vanadium; 1.0 to 5.0 wt. % molybdenum; not greater than 0.5 wt. % oxygen; and at least 40.0 wt. % iron. The high carbon content reduces the solubility of oxygen in the melt and thus lowers the oxygen content to a level below which would cause the carbide-forming elements to oxidize during atomization. The powder metal composition includes metal carbides in an amount of at least 15 vol. %. The microhardness of the powder metal composition increases with increasing amounts of carbon and is typically about 800 to 1,500 Hv50.