Titanium carbonitride (TiCN) coating was prepared on 45# carbon steel by electrical discharge coating (EDC), and the compositions, morphology and microstructure of the coating were studied. In addition, its friction and wear behaviors relative to the physical vapor deposition (PVD) TiN coating were investigated. The results show that the TiCN coating features a thickness of 15μm with a primary phase of TiC 0.3 N 0.7 . The wear rates of the two coatings have no clear distinction at low applied loads. However, severe abrasive wear appears in the PVD TiN coating when the applied load exceeds 30 N, while the TiCN coating features better wear resistance. The abrasive wear with coating peelings is found to be the predominant wear mechanism at high applied loads.
以铬/石墨半烧结体电极为工具电极,利用液相脉冲放电涂层(EDC)技术,在普通中碳钢表面制备出以Cr_7C_3为主相的耐磨涂层。对涂层的硬度、结合力、摩擦性能进行了检测与分析,并考察了峰值电流、脉冲宽度对涂层性能的影响。结果表明,涂层与基体呈冶金结合结合力达83.5 N o涂层厚度随峰值电流及脉冲宽度的增加而增加。当峰值电流小于10 A时,涂层硬度逐渐增加,而当脉冲宽度大于8μs时,涂层硬度逐渐减小。硬度从涂层表面至基体呈逐渐减小的梯度分布,涂层表面硬度最高达1820 HV0.5。与H13热作模具钢相比,在相同的载荷下,涂层的摩擦因数较小,仅为0.12左右,展现出良好的减摩耐磨特性。
