摘要
利用激光熔覆法加工制备了添加氧化钇纳米颗粒的17Cr2NiSi合金钢涂层。研究了氧化钇对微观结构,微观硬度,耐热以及耐滑动摩擦的影响。结果表明钇元素在合金涂层中与硅氧富集结合,并小于1%(质量分数)添加的纳米氧化钇在合金涂层成型过程中促进树状晶向纤维晶转变,并且降低涂层主相在600℃高温的氧化腐蚀过程,改善表面摩擦的塑性剥离,从而使铁合金涂层的氧化损失最高降低90%,表面摩擦系数最多降低10%,明显改善了铁合金的耐热氧化与耐磨性能。
The 17Cr2NiSi alloy steel coating with nano-yttria was prepared by laser cladding.The effect of yttrium oxide on microstructure,microhardness,heat resistance and sliding friction resistance was studied.The results showed that yttrium element enriched and combined with silicon and oxygen in the alloy coating,and the addition of nano-yttrium oxide less than 1%(mass fraction)promoted the transformation of dendritic crystal to fibrous crystal in the forming process of the alloy coating,and reduced the oxidation corrosion process of the main phase of the coating at 600℃,improved the plastic peeling of surface friction,thereby reducing oxidation weight loss of the coating by 90%and friction coefficient by 11%.So that the alloy coating had better heat resistance and sliding friction resistance.
作者
刘小鱼
隋意
岳俊宇
孙晓华
李磊
刘常升
LIU Xiao-yu;SUI Yi;YUE Jun-yu;SUN Xiao-hua;LI Lei;LIU Chang-sheng(School of Materials Science and Engineering,Northeastern University,Shenyang 110004,China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China;School of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Hebei Daqin Electric Power Technology Co.,Ltd.,Qinhuangdao 066004,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2020年第5期11-18,共8页
Chinese Rare Earths
基金
国家重点研发项目(2017YFB0305801)
辽宁省自然科学基金项目(U1508213)。
关键词
纳米氧化钇
激光熔覆
耐热
耐磨
nano-yttria
laser cladding
heat resistance
wear resistance
