The austenitic stainless steel was coated on 25 steel traction pin by laser cladding technology,and the microstructure and structure of the coating were analyzed and characterized by optical microscopy,scan-ning and transmission electron microscopy and X-ray diffractometer.The hardness and wear properties of the coating were tested by microhardness and wear testers.The results show that the cladding layer of the austenit-ic stainless steel is composed of equiaxed,dendrite and planar crystals,and the heat affected zone is com-posed of martensite and sorbite.The inner dendrite of the cladding layer is γ phase,and the inter dendrite is composed of γ phase and carbide Cr3C2.The microhardness of the cladding layer,heat affected zone and ma-trix are 310 HV0.1,280 HV0.1 and 170 HV0.1,respectively.The wear test indicates that the matrix of the steel is adhesive wear and abrasive wear,and the cladding layer is abrasive wear.The wear resistance of the clad-ding layer is twice that of the 25 steel matrix after 1 h wear test.
维普
万方数据
