Provided is a
welding repair method for surface defects of a centrifugal composite roller. The method specifically comprises the following steps that (1)
welding repair specifications are selected; (2) a groove is ground and cleaned; (3)
welding repair is carried out on the groove; and (4) the welding repair positions are ground. Damaged portions of a workpiece are subjected to welding repair
recovery through
electric arc heating and welding rod melting. The specifications of short sections, the intermittent mode, dispersed welding and multi-layer and multi-pass welding are followed in the
welding process. Compared with the prior art, the welding
repair method has the beneficial effects that pores,
slag inclusion, shrinkage and other defects of the centrifugal composite roller are repaired through a
cold welding method. The method has the advantages that neither preheating before welding nor
thermal treatment after welding is needed, the deformation of welded products is small, the welding operation is easy, the number of assisting procedures before welding is small, the labor intensity of welders is relieved, and the welding environment is improved. The method is suitable for welding repair and
recovery of various positions, mechanical
cutting is easily carried out after welding is completed, and the
quality level of finished products is greatly improved.