第49卷第4期2023年8月文章编号：1673-5196（2023)04-0017-07兰州理工大学学报JournalofLanzhouUniversityofTechnologyVol.49No.4Aug.2023WC含量对定向结构Ni60涂层微观组织及其摩擦性能的影响殷翔*1，马成燕，周（1.甘肃建投兰州新区建设管理有限公司，甘肃兰州730087；2.兰州理工大学材料科学与工程学院，甘肃兰州730050）摘要：采用火焰喷涂和感应重熔十强制冷却复合技术在45钢基体上制备了Ni60/WC定向结构涂层，研究了不同WC质量分数（5%、20%、35%、50%)对定向结构涂层微观组织、硬度和摩擦磨损性能的影响.结果表明：随着WC质量分数的增加，定向结构涂层中靠近界面处的枝晶表现为合并择优生长的趋势；定向结构涂层内的各类硬质相填充于晶界，起到了强化晶界的作用.涂层的硬度随着WC质量分数增加呈现正相关上升趋势，涂层的摩擦系数与磨损率随着涂层中WC质量分数的增加先减小后增大.关键词：Ni60合金；WC颗粒；微观结构演变；显微硬度；摩擦磨损性能中图分类号：TG149EffectofWCcontentonmicrostructureandfribologicalpropertiesofdirectionalNi60coatingYINXiang',MACheng-yan',ZHOUKai',WANGXin-min',WANGYi',WEIHeng-li?(1.GansuConstructionInvestmentLanzhouNewAreaConstructionManagementCo,Ltd.,Lanzhou730o87,China;2.CollegeofMateri-alsScienceandEngineering,LanzhouUniv.ofTech.,Lanzhou730050,China)Abstract:Ni60/WCdirectionalcoatingswerepreparedon45steelsubstratebyflamesprayingandinduc-tionremelting+forcedcooling.TheeffectsofWCmass-fraction(5%,20%,35%,50%)wereinvestiga-tedonmicrostructure,hardnessandtribologicalpropertiesofdirectionalcoatings.TheresultsshowedthatthedendritesneartheinterfaceofthedirectionalcoatingshowatrendofcombinedpreferentialgrowthwiththeincreaseofWCmass-fraction.Allkindsofhardphasesinthedirectionalcoatingareevenlydis-tributedinthegrainboundaries,whichplaysaroleinstrengtheningthegrainboundaries.ThehardnessofcoatingshowedapositivecorrelationwiththeWCmass-fraction,andfrictioncoefficientandwearrateofdirectionalstructurecoatingfirstdecreaseandthenincreasewiththeincreaseofWCmass-fraction.Keywords:Ni60alloy;WCparticles;microstructureevolution;microhardness;frictionandwearprop-erty镍基合金因其优异的耐磨耐蚀性能已广泛用于机械加工、航空...
