Copper mold casting face and preparation method Ni-Co-W alloy plating solution

The present invention discloses a Ni-Co-W alloy electroplating solution and a preparation method in a copper mold casting face. The method proceeds as follows: Step 1: Preparation of base bath; Step: Preparation of tungstic acid; The third step: the mixed solution; prepared a plating solution into the group: NiCl2 8 ~ 12g / L, Ni (NH2SO3) 2 450 ~ 550g / L, Co (NH2SO3) 2 25 ~ 30g / L, H2WO4 0.27 ~ 1.36g / L, H3BO3 25 ~ 30g / L. Advantage is that the production method to improve the conductivity of the plating solution, stable plating current, good surface quality of the mold copper plate coating to improve the coating hardness and wear resistance, hardness HV260 or more, using the normal on-line, offline testing found that greatest wear surface only 0.4mm, satisfies the maximum allowable wear mold is not greater than 1mm requirements; stress reduction plating, thermal stability, extend the service life of the mold copper plate.