激光熔覆Ni-Co基合金复合涂层的组织与耐磨性

发布时间：2018-04-06 02:23

本文选题：干滑动摩擦磨损　切入点：激光熔覆　出处：《热加工工艺》2015年04期

【摘要】：借助于光学显微镜、X射线衍射仪、维氏硬度计、摩擦磨损试验机等研究了1Cr17Mn6Ni5N不锈钢表面激光熔覆Ni/Co基合金复合涂层的组织与干滑动摩擦磨损性能。结果表明:涂层材料由含35%WC的Ni基合金(Ni35WC)和一定量的Co基合金粉混合构成。激光熔覆Ni35WC+30%Co基合金复合涂层硬度比单一的Ni基合金熔覆层的提高50~70 HV;复合涂层的干滑动摩擦磨损速率相比不锈钢基材的下降约51%,相比Ni基合金熔覆层的下降约25%。干滑动摩擦磨损抗力的提高被认为是固溶强化、细晶强化和硬质点化合物产生的弥散硬化共同作用的结果。
[Abstract]:By means of optical microscope X-ray diffractometer, Vickers hardness tester and friction and wear tester, the microstructure and dry sliding friction and wear properties of laser cladding Ni/Co based alloy composite coating on 1Cr17Mn6Ni5N stainless steel were studied.The results show that the coating material is composed of Ni-based alloy containing 35%WC and a certain amount of Co-based alloy powder.The hardness of the laser cladding Ni35WC 30%Co based alloy composite coating is 50 / 70 higher than that of the single Ni base alloy cladding layer, and the dry sliding friction and wear rate of the composite coating is about 51% lower than that of the stainless steel substrate and 25% lower than that of the Ni base alloy cladding layer.The increase of dry sliding friction and wear resistance is considered to be the result of the combination of solution strengthening, fine grain strengthening and dispersion hardening produced by hard spot compounds.
【作者单位】：温州大学机电工程学院;南京工业职业技术学院文理学院;
【基金】：温州市激光与光电重大科技专项资助项目(J20120005) 温州市激光与光电重点科技专项资助项目(J20120010)
【分类号】：TG174.44

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