Y_(2)O_(3)添加量对超高速激光熔覆IN718合金涂层组织和耐磨性能的影响  

Influence of Y_(2)O_(3) addition on microstructure and wear resistance of ultra-high-speed laser-clad IN718 alloy coatings

作　　者：李蕊[1] Li Rui(School of Intelligent Manufacturing,Xinxiang Institute of Vocational Technology,Xinxiang Henan 453000,China)

机构地区：[1]新乡职业技术学院智能制造学院,河南新乡453000

出　　处：《金属热处理》2024年第7期173-180,共8页Heat Treatment of Metals

摘　　要：采用超高速激光熔覆技术制备了添加Y_(2)O_(3)的IN718合金复合涂层,分析了不同Y_(2)O_(3)添加量对涂层组织形貌、相组成、硬度和耐磨性能的影响。结果表明,Y_(2)O_(3)的添加降低或消除了涂层内部的孔洞缺陷,形成了致密且细化的晶粒组织。当Y_(2)O_(3)添加量为1.0%时,涂层的硬度最高,平均硬度为380.2 HV0.1,同时还具有较优的耐磨性能,其摩擦因数和磨损量分别为0.66和5.03×10^(-4)mm^(3)/(N·m),磨损机制为磨粒磨损、粘着磨损和氧化磨损。涂层中弥散分布的Y_(2)O_(3)形成新的形核点,从而细化组织晶粒,使涂层硬度和耐磨性能得到了提升。IN718 alloy composite coatings with Y_(2)O_(3) addition were prepared by ultra-high-speed laser-cladding technology.The effect of Y_(2)O_(3) addition on coating microstructure and morphology,phase composition,hardness and wear resistance was analyzed.The results show that the addition of Y_(2)O_(3) reduces the pore defects in the coating and forms a dense and refined grain.The hardness of the coatings is the highest when Y_(2)O_(3) content is 1.0%which average value is 380.2 HV0.1,meanwhile,it has superior wear resistance with the friction coefficient of 0.66 and the wear rate of 5.03×10^(-4)mm^(3)/(N·m),and the wear mechanism is combined of abrasive wear,adhesive wear and oxidative wear.The dispersed Y_(2)O_(3) in the coatings forms nucleation point,resulting in the refinement of grains and improvement of hardness and wear resistance.

关 键 词：超高速激光熔覆 IN718合金 Y_(2)O_(3)含量 组织形貌 耐磨性能 

分 类 号：TG174[金属学及工艺—金属表面处理]