Experimental research and engineering application of laser cladding reparations

Abstract

Cast-iron parts are employed widely in all kinds of industries, which are very difficult to repair with overlaying welding methods such as electric arc, Ar arc, etc. Laser cladding is a great approach to repair this kind of parts. This paper did some experimental research of laser cladding reparations on the cast-iron parts. Growth rules of laser cladding layer has been studied through metallographic analysis. Powder gradient variation technology has been taken to solve the problem of tendency of cracks in the cladding layer, and the qualified strength and hardness are also acquired. Based on the success of experimental research, the laser cladding reparation technology is successfully applied inthe cast-iron mold in auto industry.