Effects of laser peening on the microstructure evolution and wear performance of Fe-based cladding layer
Aimed to eliminate the defects such as pore,microcrack and residual stress in traditional laser cladding layers,and improved cladding layer's mechanical property,Fe-based cladding layer was post-processed by laser peening(LP),microstructure evolution and wear mechanism of cladding layer before and after LP were comparative analyzed.The results show that,after LP process,there was no phase transition in the cladding layer,the broadening effect was generated on(110)crystal plane diffraction peak,grains of the surface layer were refined,the complex residual stress field on the surface of the cladding layer was changed,the uniformly distributed residual compressive stress was obtained,the layer's microhardness was 1.3 times of that before LP,the layer's friction coefficient is 25％lower than that before LP,the wear performance of the cladding layer was enhanced effectively.
万方数据
维普
