Effects of Annealing Temperature on Properties and Residual Stress of Spinning Laser Cladding Layer
Fe-based alloy cladding layer was prepared on 27SiMn steel by laser cladding technology,and processed by power spinning technology to improve the surface properties of the cladding layer through severe plastic deformation.The cladding cylindrical parts prepared by strong spinning process usually need heat treatment to eliminate large residual stress,which can affect the wear resistance of the cladding layer.After annealing at 350℃,450℃ and 550℃ for 2 h,the residual stress,microhardness and wear resistance were measured.The results show that the residual stress in the cladding layer decreases obviously after heat treatment,but at the same time,the surface hardness of the cladding layer decreases with the increase in temperature.After 350℃ stress relief annealing,the wear resistance reaches the best,followed by 450℃ stress relief annealing,which is better than that of the non heat treated cladding layer,and the wear resistance at 550℃ decreases to a certain extent.
power spinninglaser claddingheat treatmentmicrohardnessfriction and wear
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