Coating processes – Solid particles or fibers applied – Uniting particles to form continuous coating with...
Patent
1997-10-21
1999-03-09
Pianalto, Bernard
Coating processes
Solid particles or fibers applied
Uniting particles to form continuous coating with...
427192, 427195, 427309, 4273743, 4273744, 4273761, 4273763, 4273768, 427377, 427380, 4273837, 4273855, 4273981, 427422, 427447, 427456, B05D 302
Patent
active
058797432
ABSTRACT:
A wear-resistant hardfacing and a method for applying such a hardfacing is taught herein. A finely powdered, wear-resistant alloy and a polyvinyl alcohol (PVA) solution slurry is coated onto the metal surface of a tool, implement, or similar item to be hardfaced. Alternatively, a binding coating of PVA solution may be applied to the metal surface followed by application of a layer of a powdered alloy. After the slurry or PVA binding coating has dried, leaving a dry coat of alloy in a PVA matrix, the metal surface is heated to the fusion temperature of the alloy in vacuum, in an inert gas atmosphere, or in hydrogen atmosphere. The metal item with the fused coating is heat treated to impart desired mechanical properties to the part substrate material. The method of the present invention gives a smooth, dense coating of the wear-resistant hardfacing without nonmetallic inclusions.
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Deere & Company
Pianalto Bernard
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