Abstract: A process for producing a nickel-chromium/chromium carbide coating on a substrate comprises flame spraying nickel/chromium carbide composite powder onto the substrate to cause burnout of some of the carbon in the carbide during spraying with the result that some of the chromium becomes alloyed with the nickel. The nickel/chromium carbide composite powder comprises particles each having a core of chromium carbide at least partially coated with nickel, and the coating comprises chromium carbide particles in a matrix of nickel-chromium alloy.

Abstract: This invention relates to the protection of metallic surfaces susceptible to abrasion by rock-like material. According to the invention, a metallic surface susceptible to abrasion by rock-like material is protected by stud welding studs of abrasion resistant metallic material to the metallic surface in closely spaced relationship to cause the majority of the rock-like material to contact the abrasion resistant studs instead of the metallic surface. Typical of such metallic surfaces are a ground engaging tool, earth-working equipment, or chutes for conveying the rock-like material. The abrasion resistant metallic material comprising the stud can be formed of cast material of compacted metallic powder.