Wear properties of self-lubricating Cr_xS_y/Ni coatings on 304 stainless steel by pre-placed laser cladding

Self-lubricating NiCrBSi–Ni/MoS2 coatings are prepared on 304 stainless steel by pre-placed laser cladding, in which Ni/MoS2 is almost completely decomposed and the CrxSy anti-friction phase is in situ generated. Meanwhile, (Cr, Fe)2B and (Cr, Fe)7C3 are generated from the molten pool as a result of oversaturated B and C atoms in γ-Ni and the diffusion of Fe atoms. Therefore, the composite coatings are mainly composed of γ-(Ni, Fe), (Cr, Fe)2B,...