The invention relates to a preparation method of a wear-resistant
coating for a high-accuracy roller piece. In the invention, a
nickel-based (or
cobalt-based) prefabricated layer is prepared by using a supersonic
flame spraying process, and the prefabricated layer is treated by adopting an
induction heating method, so that the bonding intensity between the
coating and a substrate is enhanced. Thewear-resistant
coating is prepared by adopting a
composite surface treatment technology, so that a workpiece is prevented from being deformed in the
machining process, the prepared coating is dense and crackless and has uniform
hardness and high binding intensity, and the surface
wear resistance and
impact resistance of the workpiece are enhanced; and moreover, a preparation technology has the advantages of simple process, high cladding efficiency, low
machining cost and the like. After
machining, the binding intensity between the coating and the substrate is more than or equal to 70 MPa, andthe
hardness of the coating can be up to HRB 55-70 by adjusting the adding amount of
solid-phase wolfram
carbide (WC) in spraying
powder. The preparation method can be widely applied to the preparation of surface reinforced
layers for industrial components with severe working conditions, such as high-frequency friction pairs,
papermaking rollers, pumping rods, loops and the like.