Hardsurfacing material for engine components and method for depositing same
AssigneeEaton Corporation
InventorsRoger D. Dennis, Michael L. Killian, Jay M. Larson, Sundaram L. Narasimhan, Dennis T. Vukovich, Homer D. Wireman
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Abstract
A method for applying a hardsurfacing material to a workpiece such as a reciprocating aircraft engine tappet in which a carbon-containing wear resistant material in powder form is applied to a surface of the workpiece in the molten state while a sharp temperature gradient is established from the surface into the body of the workpiece to ensure that solidification occurs from the body upward. The resulting surface material consists of wear resistant carbides in a tough martensitic matrix with minimal formation of graphite.
Claims15
A method for applying a wear resistant metallic material to a first surface of a metallic workpiece comprising the steps of supporting the workpiece in intimate contact with a block of heat conducting material with the first surface oriented substantially horizontally, depositing the wear resistant material to said first surface in a molten state, and simultaneously with said deposition step directing a fluid coolant only onto a second surface of a portion of said workpiece directly underlying said first surface.
In apparatus for applying a wear resistant metallic material to metal workpiece having a first surface and a second surface underlying said first surface, comprising a support block formed of a heat conducting material, said support bloc, having a cavity formed therein to receive the workpiece in intimate contact therewith;
- and means for applying the wear resistant material in a molten state to said first surface of said workpiece;
- the improvement comprising means for directing a fluid coolant onto said second surface.
A body member for an internal combustion engine tappet having a wear resistant face formed on a first surface thereof wherein said wear resistant face is formed by supporting the body member in intimate contact with a block of heat conducting material with the first surface oriented substantially horizontally, depositing the wear resistant material to said first surface in a molten state, and simultaneously with said deposition step directing a fluid coolant onto a second surface of a portion of said body member underlying said first surface.
Dependencies are inferred from the claim text.