DIAMOND FLUX-CORED WIRE FOR ADDITIVE MANUFACTURING AND PREPARATION METHOD THEREOF

The invention relates to the technical field of additive manufacturing of diamond tools, in particular to a diamond flux-cored wire for additive manufacturing and a preparation method thereof. The diamond flux-cored wire for additive manufacturing includes brazing filler metal skin and diamond flux-cored; the brazing filler metal skin is wrapped on the surface of the diamond flux core; according to parts by mass, the diamond core consists of the following raw materials: 20-55 parts of surface modified diamond, 15-35 parts of brazing flux, 10-40 parts of metal additive and 1-5 parts of dispersant A; the material of the solder skin is nickel-chromium alloy or copper-tin alloy. When that diamond flux-cored wire material of the invention is use for adding material to manufacture a diamond tool, the diamond doe not suffer from thermal damage, the utilization rate is high, and the distribution state and concentration are easy to control; the diamond flux-cored wire material can adapt to a wide range of heat source forms (can be applied to arc additive, laser additive, plasma additive and other heat source forms); and the diamond tool prepared by adding material with the diamond flux-cored wire material has high quality and long service life.