水介质下2种摩擦副材料磨损行为和机理研究  

Study on Wear Behavior and Mechanism of Two Friction Pairs in Water Medium

作　　者：曹四龙 王凌倩[1] 胥卫奇 周健松[1] CAO Si-long;WANG Ling-qian;XU Wei-qi;ZHOU Jian-song(Key Laboratory of Science and Technology on Wear and Protection of Materials,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]中国科学院兰州化学物理研究所中国科学院材料磨损与防护重点实验室,甘肃兰州730000

出　　处：《水下无人系统学报》2021年第6期709-715,共7页Journal of Unmanned Undersea Systems

摘　　要：针对水中兵器关键部件在服役过程中发生的摩擦磨损问题,开展适用于水介质下的摩擦副材料及其摩擦学性能研究。利用激光熔覆技术制备了Co基合金涂层,研究了Co基合金涂层及Co基合金-PEF复合涂层与2种合金材料在水介质条件下配副时的摩擦学行为,并与38CrMoAl-锡青铜摩擦副进行了对比。结果表明:在水介质中,38CrMoAl-锡青铜摩擦副具有最高的摩擦系数和磨损率,分别为0.420和1.503×10^(-5)mm^(3)/(N·m),磨损机理主要为严重的黏着磨损和磨粒磨损;Co基合金涂层具有较高的显微硬度和抗塑性变形能力,与GH2130和GH4169对磨时摩擦系数分别为0.209和0.306,磨损率为2.321×10^(-6)mm^(3)/(N·m)和4.283×10^(-6)mm^(3)/(N·m),磨损机理主要为磨粒磨损;Co基合金-PEF复合涂层与GH2130构成的摩擦副摩擦系数为0.079,涂层磨损率为1.257×10^(-8)mm^(3)/(N·m),在4种摩擦副中表现出最优异的摩擦磨损性能。In view of the friction and wear problems of key components of underwater weapons,research on friction pair materials suitable for water media and their tribological properties is carried out.Co-based alloy coatings are prepared by laser cladding technology.The tribological behavior of Co-based alloy coatings and Co-based alloy-PEF composite coatings sliding against two kinds of alloys in water is studied and compared with that of a 38CrMoAl-tin bronze friction pair.The results show that the 38CrMoAl-tin bronze friction pair has the highest friction coefficient and wear rate in water,with values of 0.420 and 1.503×10^(-5)mm^(3)/N·m,respectively.The wear mechanism mainly involves severe adhesive wear and abrasive wear.The Co-based alloy coating exhibits high microhardness and resistance to plastic deformation.When the Co-based alloy coating slides against GH2130 and GH4169,the friction coefficients are 0.209 and 0.306,while the wear rates are 2.321×10^(-6)mm^(3)/N·m and 4.283×10^(-6)mm^(3)/N·m,respectively.The wear mechanism mainly involves abrasive wear.The friction coefficient of the friction pair,Co-based alloy-PEF composite coating and GH2130,is 0.079,and the wear rate is 1.257×10^(-8)mm^(3)/N·m,which shows the best friction and wear performance among the four friction pairs.

关 键 词：水中兵器 Co基合金涂层 水介质 摩擦学性能 磨损机理 

分 类 号：TJ630.4[兵器科学与技术—武器系统与运用工程] TB34[一般工业技术—材料科学与工程]