Method for forming diamond abrasion-resisting layer

The invention relates to a method for forming a diamond abrasion-resisting layer. The method for forming the diamond abrasion-resisting layer comprises the steps that a nickel-based alloy is sprayed on the surface of an object through a plasma arc high-temperature spray gun, and a molten bath is formed; diamond powder is sprayed into the molten bath by the spray gun through argon, the diamond powder is evenly covered on the surface of a cladding workpiece, and the diamond abrasion-resisting layer is formed; the particle size of used nickel-based alloy powder is 100-150 meshes, and the particle size of the used diamond powder is 35-100 meshes; the diamond powder is a diamond with a cladding layer, and metal of the cladding layer is copper, nickel and titanium; and a nozzle of the nickel-based alloy powder is located in the middle, and a plurality of nozzles of the diamond powder are arranged around the nickel-based alloy powder. Thus, the method for forming the diamond abrasion-resisting ...