A process for the production of a coated plasticising screw for the injection molding or extrusion of plastic material, wherein at least the wearing surfaces of the plasticising screw are coated with a metal-based alloy, comprising the following steps:coating at least said wearing surfaces with said alloy,heating the coated plasticising screw for fusing said alloy to said plasticising screw, andcooling off said coated plasticising screw,wherein in the fusing operation all the coated wearing surfaces are simultaneously exposed to a temperature which is above the melting temperature of said alloy.