稀土Y_(2)O_(3)对激光熔覆Fe60-Y_(2)O_(3)涂层显微组织和摩擦学性能的影响  

Microstructure and Tribological Properties of Laser Cladding Fe60-Y_(2)O_(3)Coating

作　　者：王鑫 赵恩兰[1] 王义赛 贺亦柏 史俊勤 杨海峰[1,2] WANG Xin;ZHAO Enlan;WANG Yisai;HE Yibo;SHI Junqin;YANG Haifeng(School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《铸造技术》2023年第7期657-664,共8页Foundry Technology

基　　金：国家自然科学基金(52275224);凝固技术国家重点实验室开放课题(SKLSP202324)。

摘　　要：稀土在激光熔覆中可改善激光熔覆层的组织和性能,研究了添加质量分数为1.0%的稀土氧化物Y_(2)O_(3)对激光熔覆Fe60涂层显微组织和摩擦学性能的影响。使用激光熔覆技术在16Mn基板表面制备了Fe60涂层和Fe60-Y_(2)O_(3)涂层;采用XRD、OM、SEM、EDS对比分析了Fe60涂层和Fe60-Y_(2)O_(3)涂层的显微组织;通过维氏硬度计、摩擦磨损试验机、3D形貌仪和SEM研究了两种涂层的显微硬度、摩擦学性能和磨损机理。结果表明,与Fe60涂层相比,Fe60-Y_(2)O_(3)涂层的二次枝晶臂间距为2.925μm,减小了17.4%;截面显微硬度为701 HV0.3,提高了9.5%;摩擦系数为0.312,降低了40.3%;体积磨损率为2.36×10-5 mm3/(N·m),降低了30.8%。可见,Fe60-Y_(2)O_(3)涂层具有细化的显微组织、更高的显微硬度、更低的摩擦系数和更好的抗磨损性能。Rare earth can improve the microstructure and properties of the laser cladding layer in laser cladding.In this paper,the effects of rare earth Y_(2)O_(3)with a mass fraction of 1.0%on the microstructure and tribological properties of a laser cladding Fe60 coating were studied.First,an Fe60 coating and Fe60-Y_(2)O_(3)coating were prepared on the surface of a 16Mn substrate by laser cladding.Then,the microstructure of both the Fe60 coating and Fe60-Y_(2)O_(3)coating was analysed by XRD,OM,SEM and EDS.Finally,the microhardness,tribological properties and wear mechanism of the two coatings were studied by a Vickers hardness tester,friction and wear tester,3D profilometer and SEM.The results show that compared with the Fe60 coating,the secondary dendrite arm spacing of the Fe60-Y_(2)O_(3)coating is 2.925μm,which is reduced by 17.4%;the cross-section microhardness is 701 HV0.3,which is increased by 9.5%;the friction coefficient is 0.312,which is decreased by 40.3%;and the volume wear rate is 2.36×10-5 mm3/(N·m),which is decreased by 30.8%.Therefore,the Fe60-Y_(2)O_(3)coating with finer grains has a higher microhardness,lower friction coefficient and better wear resistance.

关 键 词：激光熔覆 Fe60-Y_(2)O_(3)涂层 细化晶粒 磨损 

分 类 号：TH142.1[一般工业技术—材料科学与工程] TG301[机械工程—机械制造及自动化]