The invention provides a preparation method of a rose gold
coating of a high-speed steel cutter, which comprises the following steps: performing Ti
ion etching on the surface of the high-speed steel cutter and synchronously depositing a Ti layer by adopting a
vacuum arc ion plating method, then introducing N2 and C2H2 gas to perform
combination reaction with Ti ions to form rose gold ions and deposit a Ti (C, N) layer on the Ti layer, and finally forming the rose gold
coating. Comprising a Ti layer and a Ti (C, N) layer. The LAB values of the colors of the rose gold
coating are L 61, a 13 and b 17, the thickness is 1-1.5 microns, the
surface roughness is smaller than 50 nm, the
hardness is 30-35 GPa, the
adhesive force is larger than 60 N, and the rose gold coating has excellent
wear resistance. The method solves the problems of low
cost efficiency and insufficient performance of a gold-
copper alloy coating, has the characteristics of high production efficiency, low process cost, stable coating performance, capability of achieving rose gold appearance quality and the like, is suitable for improving the core value and brand competitiveness of cutter products, and is relatively high in practicability and generalization performance.