Method for facing a substrate
AssigneeCutting & Wear Resistant Developments Limited
InventorsMark A. Russell, Frederick B. Russell
Life of this patent
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Abstract
A method of facing a substrate comprises the steps of first welding a body of a hard facing material to the substrate and then filling a space around the body with a molten metal. The method can be used in the hard facing of metal components with, for example, hard facing materials such as tungsten carbide. The substrate can comprise a metal surface, which can, for example, be the surface of any suitable component, tool, or implement subject to wear in use. The method is particularly suitable for hard facing the wear surfaces of components for use in drill strings in down-hole drilling technology, for example, drill stabilizers.
Claims24
A method of hard facing a substrate, which comprises the steps of:
- a) first welding a plurality of bodies of a hard facing material to the substrate to define spaces around and between said bodies;
- and,
- b) then filling said spaces with a molten metal to anchor said plurality of bodies to the substrate, wherein, prior to the welding step, the bodies have a flat surface and make only point contact with a curved surface of the substrate, and, after the welding step, voids remain between the bodies and between the bodies and the substrate which are filled with molten metal to anchor the bodies.
A method of facing a substrate, which comprises the steps of:
- (a) assembling bodies of a facing material on a perforated mat or support having a pattern of holes corresponding to the desired relative position of the bodies on the substrate;
- (b) removably affixing the perforated mat or support bearing the bodies of facing material to the substrate;
- (c) welding the plurality of bodies of facing material to the substrate;
- (d) separating the perforated mat or support from the substrate with the bodies of facing materials affixed to the substrate;
- and
- (e) filling the spaces around the bodies of facing material with an anchoring material.
Dependencies are inferred from the claim text.