激光熔覆WC/Ni基复合涂层高温滑动干摩擦磨损性能  

High Temperature Dry Sliding Friction and Wear Performance of Laser Cladding WC/Ni Composite Coating

作　　者：杨胶溪[1] 张健全[1] 常万庆 王艳芳 陈虹[1] 王喜兵[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《材料工程》2016年第6期110-116,共7页Journal of Materials Engineering

基　　金：国家973计划(2011CB606365-3);国家自然科学基金(50971004);研究生创新平台建设(101000543214524)

摘　　要：利用激光熔覆技术制备微米团聚和块状两种不同类型WC/Ni基复合涂层。在MMG-10型摩擦磨损试验机上对涂层进行高温滑动干摩擦磨损实验,并用SEM和EDS对涂层进行磨损形貌观察和成分分析。结果表明,激光熔覆WC/Ni基复合涂层高温磨损性能随着WC含量增加而提高,WC形态为微米团聚质量分数为60%的复合涂层具有优良的高温耐磨性能。高温下60%WC/Ni基复合涂层主要磨损机制由低温下的磨料磨损转变为氧化磨损和磨料磨损复合作用。Two different types of agglomerate and angular WC/Ni matrix composite coatings were deposited by laser cladding.The high temperature wear resistance of these composite coatings was tested with a ring-on-disc MMG-10 apparatus.The morphologies of the worn surfaces were observed using a scanning electron microscopy(SEM)equipped with an energy dispersive spectroscopy(EDS)for elemental composition.The results show that the high temperature wear resistance of the laser clad WC/Ni-based composite coatings is improved significantly with WC mass fraction increasing.The 60%agglomerate WC/Ni composite coating has optimal high temperature wear resistance.High temperature wear mechanism of 60% WC/Ni composite coating is from abrasive wear of low temperature into composite function of the oxidation wear and abrasive wear.

关 键 词：激光熔覆 复合涂层 碳化钨 高温滑动干摩擦 磨损性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]