Study On Process Of ER630 Laser-Electric Composite Additive Forming

As the core component of the mine hydraulic support,the hydraulic cylinder is often worn and fractured on the surface of the inner and outer walls due to its harsh working conditions.If the overall replacement cost is high and the resources are wasted.In this regard,laser melting technology can provide a solution.The traditional powder laser melting additive repair technology uses metal powder as raw material to achieve excellent melting effect,but the powder cost is high and the material utilization rate is low.To solve this problem,the laser cladding coating additive repair process with metal wire as raw material was proposed,and it was expected to replace powder with wire for additive repair.ER630,solid 630 stainless steel wire,also known as 17-4PH.In this paper,ER630 stainless steel was used as melting coating material to study the laser melting coating process of wire.The influence of process parameters on the forming single channel,the influence of process parameters on the forming multilayer,the influence of process parameters on the temperature field distribution in the forming process and the influence of forming temperature on the forming quality were analyzed.Due to the rapid forming speed and cooling rate of molten pool,it is difficult to monitor the temperature field of the forming process in real time by equipment.Therefore,the finite element simulation of the forming process is carried out by means of simulation.The change of temperature field in the forming process is analyzed,and the influence of forming temperature on the forming quality is studied and analyzed.Firstly,through the single factor analysis experiment,the effects of wire feeding direction,wire feeding density and laser power on the single-channel forming quality were explored.Through the study of different process parameters on the forming appearance,cross-section size parameters and local hardness distribution of cross-section of the forming single channel,it is found that the continuity and flatness of the whole using the reverse wire feeding are significantly better than those of the forward wire feeding,which is favorable.