Research on the Effect of Laser Cladding Powder Feeding Quantity on the Structure and Properties of 17-4PH Stainless Steel Based Tungsten Carbide Cladding Layer
Based on the repair and remanufacturing of friction damage areas in mechanical equipment,17-4PH martensitic precipitation hardening stainless steel used for steam turbine blades was selected as the research object.Laser cladding technology was used for innovative surface repair.Ni and WC alloy powders were melted on the surface of 17-4PH stainless steel at different powder feeding rates.The microstructure and composition distribution of the cladding layer,the interface between the cladding layer and the substrate,and the substrate were observed and tested.Test the mechanical properties of the cladding layer and analyze the direct impact of powder feeding on the coating quality during the testing process.The experimental results show that under the same laser power(1 250 W)and powder feeding rate(10 mm/s),the microhardness of the cladding layer increases with the increase of powder feeding amount.
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