Methods of forming wear resistant layers on metallic surfaces
AssigneeKennametal Inc.
InventorsPrakash K. Mirchandani, Morris E. Chandler
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Abstract
Methods for forming a wear resistant layer metallurgically bonded to at least a portion of a surface of a metallic substrate may generally comprise positioning hard particles adjacent the surface of the metallic substrate, and infiltrating the hard particles with a metallic binder material to form a wear resistant layer metallurgically bonded to the surface. In certain embodiments of the method, the infiltration temperature may be 50° C. to 100° C. greater than a liquidus temperature of the metallic binder material. The wear resistant layer may be formed on, for example, an exterior surface and/or an interior surface of the metallic substrate. Related wear resistant layers and articles of manufacture are also described.
Claims51
A method of forming a wear resistant layer on at least a region of a surface of a metallic substrate, the method comprising:
- positioning a mandrel proximate to the surface of the metallic substrate to define a gap between the mandrel and the surface of the metallic substrate;
- positioning a homogeneous layer consisting of hard particles in the gap adjacent the metallic substrate;
- positioning a homogeneous layer consisting of a solid metallic binder material adjacent the homogeneous layer consisting of hard particles;
- and
- infiltrating the homogeneous layer consisting of hard particles with the metallic binder material in the homogeneous layer consisting of the solid metallic binder material, thereby binding together the hard particles to form the wear resistant layer metallurgically bonded to the surface of the metallic substrate.
A method of forming a wear resistant layer on at least a region of a surface of a metallic substrate comprising one of a steel, nickel, a nickel alloy, titanium, a titanium alloy, aluminum, an aluminum alloy, copper, a copper alloy, cobalt, and a cobalt alloy, the method comprising:
- positioning a mandrel proximate to the surface of the metallic substrate to define a gap between the mandrel and the surface of the metallic substrate;
- positioning hard particles comprising at least one of carbide particles, nitride particles, boride particles, silicide particles, oxide particles, and particles comprising a solid solution of at least two of carbide, nitride, boride, silicide, and oxide in the gap adjacent the metallic substrate;
- positioning a metallic binder material comprising at least one of copper, a copper alloy, aluminum, an aluminum alloy, iron, an iron alloy, nickel, a nickel alloy, cobalt, a cobalt alloy, titanium, a titanium alloy, magnesium, a magnesium alloy, a bronze, and a brass adjacent the hard particles;
- and
- infiltrating the hard particles with the metallic binder material, thereby binding together the hard particles to form the wear resistant layer metallurgically bonded to the surface;
- wherein a cross-sectional shape of the metallic substrate differs from a cross-sectional shape of the wear resistant layer the cross-section taken perpendicular to the longitudinal axis passing through the metallic substrate and wear resistant layer.
Dependencies are inferred from the claim text.