Lathe Spindle Remanufacturing Based on Laser Cladding Technology

With the promotion of the sustainable development strategy,remanufacturing research on damaged and retired machine tool containing high additional value is getting increasing attention.As one of the core components of the machine tool,damage lathe spindle remanufacturing becomes the key issue for machine tool remanufacture.The FeCr alloy was deposited on 45 steel spindle used Nd∶YAG laser by laser cladding technology.The microstructure,phase constitution,hardness and wear resistance of the cladding layer were investigated by scanning electron microscope,X-ray diffractometer,Vickers digital micro-hardness and sliding wear tester.The laser cladding layer on spindle was ground by the grinder.The results shows that the cladding layer is free of cracks,presents a remarkable hardness up to 547HV0.1,and has excellent wear resistance which is 3.7times of the substrate.Remanufacturing spindle restore the design size,and has less amount of wear compared with that of a new spindle after the same service time.It illustrates that laser cladding is a promising technology for lathe spindle remanufacturing.