Inventors:
V. Durga Nageswar Rao - Bloomfield Township MI
Robert Alan Rose - Grosse Pointe Park MI
David Alan Yeager - Plymouth MI
Carlo Alberto Fucinari - Farmington Hills MI
Assignee:
Ford Global Technologies, Inc. - Dearborn MI
International Classification:
B22F 100
C10M10304
Abstract:
An iron or copper based metal powder useful for plasma deposition of a coating that has a dry coefficient of friction 0. 75 or less and readily conducts heat through the coating. The powder comprises (a) H. sub. 2 O atomized and annealed particles consisting essentially of (by weight) carbon 0. 15-85%, oxygen 0. 1-0. 45%, an air hardening agent selected from manganese and nickel of 0. 1-6. 5%, and the remainder iron or copper, with at least 90% of the particles having oxygen and iron or copper combined in the lowest atomic oxygen form for an oxide of such metal. A method of making anti-friction iron powder that is economical, selectively produces FeO and promotes fine flowable particles. The method comprises (a) steam atomization of a molten steel that excludes other oxygen, the steel containing carbon up to 0. 4% by weight to produce a collection of comminuted particles, and (b) annealing the particles in an air atmosphere for a period of time of 0. 25-2.