In order to ensure the smooth operation of the laser cladding process and the quality and performance of the final coating, the surface of the sprayed workpiece must be thoroughly cleaned to remove all grease, dust, oxides, moisture and other contaminants. And the workpiece surface needs to have a certain roughness to provide a good mechanical bite force to ensure a firm combination between the coating and the substrate. The size and shape of the workpiece should meet the requirements of the hot cladding equipment to ensure that the coating can be uniformly and completely covered on the surface of the workpiece. In some special cases, it is necessary to carry out special pretreatment on the workpiece surface, such as preheating, shot peening, etc., to improve the adhesion and wear resistance of the coating. Special attention should be paid to the surface of the workpiece should not have cracks, slag inclusion, porosity and other defects, these defects will affect the adhesion and overall performance of the coating.

   Spraying laser cladding materials have very strict requirements on the surface of the workpiece, and only by meeting these requirements can the quality and performance of the coating achieve the desired effect. Therefore, before spraying laser cladding materials, the surface of the workpiece must be fully prepared and treated.