Influence of Organics Cladding Pretreatment on Microstructures and Properties of Austenitic Steel Coating via Laser Remanufacturing Technology

We report a new organics cladding pretreatment technique to fabricate the austenitic steel coating via the laser remanufacturing technology and demonstrate that the organics cladding pretreatment could refine the grains and alleviate defects of the coating remarkably, which consequently enhances significantly the mechanical property. In addition, a new synchronous lateral powder feeding device is employed to prevent the nozzle from being blocked by organics coated powder and also protect the surface of the molten pool from being oxidized. This new organics cladding pretreatment technique may be important for the technological improvement in the mechanical property of coating fabricated via laser remanufacturing method.