CeO_(2)添加量对激光选区熔化TC4合金摩擦磨损性能的影响  

Effect of CeO_(2)Addition on Friction and Wear Properties of Selective Laser-Melted TC4 Alloys

作　　者：李振华 宋都都 章煜 尹博 闫洪军[2] 蒋杨英 唐建良 LI Zhenhua;SONG Dudu;ZHANG Yu;YIN Bo;YAN Hongjun;JIANG Yangying;TANG Jianliang(School of Marine Engineering Equipment,Zhejiang Ocean University,Zhoushan 316022,China;Zhoushan 7412 Factory,Zhoushan 316022,China)

机构地区：[1]浙江海洋大学海洋工程装备学院,浙江舟山316022 [2]舟山市7412工厂,浙江舟山316022

出　　处：《材料保护》2024年第7期66-72,135,共8页Materials Protection

基　　金：国家自然科学基金(No.51205359)。

摘　　要：钛合金具有广阔的应用前景,为提高钛合金的成形质量和耐磨性能,采用激光选区熔化(Selective Laser Melting,SLM)技术制备TC4合金,通过添加不同含量(0、0.10%、0.15%、0.20%、0.25%)的CeO_(2)对TC4合金进行改性。使用XRD、SEM、电子万能试验机、摩擦磨损试验机和三维光学轮廓仪探究了CeO_(2)含量对TC4合金的显微组织、相组成、力学性能及摩擦磨损性能的影响。结果表明:采用激光选区熔化技术制备添加适量CeO_(2)的TC4合金,相比TC4合金原样,其组织得到细化,力学性能提升,摩擦系数和磨损量明显下降,黏着磨损和磨粒磨损的作用效果减弱。当CeO_(2)的含量为0.15%时,试样的硬度达到356.8 HV,屈服强度和抗拉强度分别达到1027 MPa和1293 MPa,远超锻件水平,平均摩擦系数和磨损量达到最低值,分别为0.412和3.729×10^(-2)mm^(3),其磨损机制为轻微的黏着磨损和磨粒磨损。Titanium alloys have broad application prospects.In order to improve the forming quality and wear resistance of titanium alloys,selective laser melting(SLM)technology was used to prepare TC4 alloys,and the TC4 alloys were further modified by adding different contents(0,0.10%,0.15%,0.20%,0.25%)CeO_(2).Subsequently,XRD,SEM,electronic universal testing machine,friction and wear testing machine and three-dimensional optical profilometer were used to explore the effect of CeO_(2)content on the microstructure,phase composition,mechanical properties and friction and wear properties of TC4 alloy.Results showed that compared to the original TC4 alloy,the TC4 alloy obtained by selective laser melting technology with adding an appropriate amount of CeO_(2)possessed refined structure,strong mechanical pro-pensities,low friction coefficient and wear amount and weak effects of adhesive wear and abrasive wear.When the CeO_(2)content was 0.15%,the hardness of the as-obtained sample reached 356.8 HV,the yield and tensile strengths reached 1027 MPa and 1293 MPa,far exceeding the level of forgings.Meanwhile,the average friction coefficient and wear amount reached the lowest values,which were 0.412 and 3.729×10^(-2)mm^(3),respectively,and the wear mechanisms were slight adhesive and abrasive wear.

关 键 词：激光选区熔化 TC4钛合金 稀土改性 摩擦学性能 

分 类 号：TH117[机械工程—机械设计及理论]