等离子熔覆Ni基Ti (C,N) 复合增强涂层研究

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Abstract： The Q235 steel has issues with poor wear resistance and hardness.Toaddress this，a Ti（C，N）-reinforced Ni-based composite coating was fabricated on the surface of Q235 steel using plasma cladding technology.The influence of diferent TiCand TiN particleconcentrations onthe microstructureand properties of theNi-based composite coating was investigated.The results show that the Ni-based reinforced coating primarily consists of matrix phases such as FeNi3 ， Cr2Ni3 ，and NiTi，as well as hard phases like Ti（C，N）.The microhardness of the coating increases with the TiC content， reaching a maximum of 847.6HV1.0 when 20wt% TiCand 10wt% TiN are aded.As the TiN content increases，the wear mechanism transitions from oxidative wear to adhesive wear，abrasive wear，and oxidative wear. The coating exhibits the lowest wear weight loss rate， 1.21×10-3g/ （N·h），when the mass fractions of TiC and TiN are 20% and 10% ，respectively.

Keywords：plasmacladding;Ti （C，N） ;microhardness;wear

1序言

Q235钢作为一种常见的低碳结构钢，在多个领域中具有重要用途，具有一定强度、良好的可塑性和优越的焊接性能，使其成为建筑工程、汽车制造、船舶制造、石油化工、机械制造及电力设备等行业中不可或缺的材料[1]，但Q235钢易受交变载荷的影响，导致严重的磨损问题[2。（剩余8476字）