Characterization of Fe-Based Layers Deposited by Laminar Plasma Cladding on Low-Carbon Steel

In order to investigate the experimental characteristics of Fe-based cladded layers obtained by laminar plasma cladding, Fe-based cladded layers on Q235 steel were prepared by using a homemade laminar plasma cladding system. Then, the characteristics of the Fe-based layers were measured and discussed in order to explore the cladding mechanism of Fe-based powder on the surface of Q235 steel. Experimental results show that the substrate was mainly composed of equiaxed ferrite and fine-grained pearlite, while the heat-affected zone was composed of coarse grains and the cladded layer of acicular ferrite and (Fe, Cr) x (C, B) y . The cladded layer was mainly composed of α -(Fe, Ni) and (Cr, Fe) 7 (C,B) 3 phases, which could improve the hardness of the cladded layer up to 600 HV 0.2 . The average friction coefficients of the substrate and cladded layer were around 0.20 and 0.14, respectively, showing that the cladded layer has greater wear resistance.