Federal-mogul Corporation

La Corporation De L'ecole Polytechnique De Montreal

Tenneco Gmbh

Corporation De L'ecole Polytechnique De Montreal

La Corporation De L'ecole Polytechnique De Montreal-campus of University of Montreal

Todd Schoenwetter

Denis B Christopherson, Jr

Leslie John Farthing

Philippe Beaulieu

Gilles L'Esperance

Gilles L'Espérance

Jeremy Koth

Gilles L'esperance

Leslie Farthing

Phillipe Beaulieu

Jr Denis B Christopherson

Denis B Christopherson

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.

Powder metal material for wear and temperature resistance applications

Method for producing powder metal compositions for wear and temperature resistance applications

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

A thermal spray powder is provided for use in a thermal spray technique, such as flame spraying, plasma spraying, cold spraying, and high velocity oxygen fuel spraying (HVOF). The thermal spray powder is formed by water or gas atomization and comprises 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, based on the total weight of the thermal spray powder. The thermal spray powder can be applied to a metal body, such as a piston or piston ring, to form a coating. The thermal spray powder can also provide a spray-formed part.

Thermal spray applications using iron based alloy powder

A powder metal steel alloy composition for high wear and temperature applications is made by water atomizing a molten steel alloy composition containing C in an amount of at least 3.0 wt %; at least one carbide-forming alloy element selected from the group consisting of: Cr, V, Mo or W; an O content less than about 0.5 wt %, and the balance comprising essentially Fe apart from incidental impurities. 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 element(s) to oxidixe during water atomization. The alloy elements are thus not tied up as oxides and are available to rapidly and readily form carbides in a subsequent sintering stage. The carbon, present in excess, is also available for diffusing into one or more other admixed powders that may be added to the prealloyed powder during sintering to control microstructure and properties of the final part.

Powdered metal alloy composition for wear and temperature resistance applications and method of producing same

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

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Waupun, WI, United States of America

Todd Schoenwetter