Research Status and Development Trends of Deformation Control in Laser Cladding Forming Process
Due to its advantages of high energy density,low dilution rate,dense cladding layer,small heat-affected zone,and high bonding strength,laser cladding technology has been widely applied in fields such as aviation,aerospace,automotive and mechanical manufacturing.However,the existence of thermal stress and residual stress during the laser cladding process can cause the deformation of the cladding parts,thereby affecting their accuracy and performance.Therefore,deformation control in laser cladding is always a hot and difficult research topic.The causes and mechanisms of cladding deformation was first introduced,and then the traditional methods for controlling cladding deformation,including process parameter optimization and scan path optimization were discussed.Process parameter optimization mainly adjusts laser power,scanning speed,powder feeding speed and other parameters,which can reduce the cladding deformation to some extent,but it also has certain limitations.Scan path optimization controls cladding deformation by optimizing the scanning trajectory,such as using staggered scanning and symmetrical scanning.Furthermore,the temperature control methods,including preheating insulation and forced cooling,and the role of pre-deformation in controlling cladding deformation,were summarized.Finally,the control effects of field-assisted technology on laser cladding deformation were introduced and the future development direction of laser cladding deformation control technology was prospected.
laser claddingdeformation controlscan-ning pathtemperature field
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