WC-11Co硬质合金与不同岩石的摩擦磨损特性  

Friction and wear performances of WC-11Co cemented carbides sliding against different rocks

作　　者：李秀林[1,2] 陈丽勇[1,2] 易丹青[1,2] 赵声志[3,4] 张忠健[3,4] 郑晓晨[1] 王斌[1,2] 刘会群[1,2] 彭宇[3,4] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083 [3]株洲硬质合金集团有限公司,株洲412000 [4]硬质合金国家重点实验室,株洲412000

出　　处：《粉末冶金材料科学与工程》2015年第3期398-405,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：五矿湖南有色基金项目(YSZN2013CL01);国家科技支撑计划项目(2011BAE09B03和2014BAC03B05)

摘　　要：在MMU-10型多功能摩擦磨损试验机上采用销盘湿式摩擦方式,研究WC-11Co硬质合金与两种花岗岩摩擦副的摩擦磨损性能,利用扫描电子显微镜观察硬质合金的磨损表面形貌。结果表明:在同一摩擦条件下,硬质合金/高硬度花岗岩摩擦副的摩擦因数较低;当载荷为700 N时,硬质合金/高硬度花岗岩摩擦副的硬质合金磨损质量损失较高,与硬质合金/低硬度花岗岩摩擦副的硬质合金磨损质量损失差约为4%;而在其他低载荷摩擦条件下,两摩擦副的硬质合金磨损质量损失差均在12%左右,这表明在较低载荷作用下,配副材料对硬质合金磨损的影响相对增大;硬质合金/高硬度花岗岩的磨损机理主要为Co粘结相塑性变形、WC晶粒脱落,硬质合金/低硬度花岗岩的磨损机理主要为硬质合金表面的刮擦。The friction and wear properties of WC-11 Co cemented carbides against two kinds of granites were evaluated on the MMU-10 pin-on-disk multifunctional friction and wear tester under wet sliding condition, and the morphological analyses of the worn surface were studied by scanning electron microscope. The results show that, under the same friction condition, the friction coefficient of the cemented carbides against granite with higher hardness is lower than those of the cemented carbides against granite with lower hardness. Under the 10ad of 700 N, the mass loss of the cemented carbides against granite with higher hardness is 4% more than that of the cemented carbides against granite with lower hardness; and under the lower load, the mass loss difference of the cemented carbides between the two friction pairs is about 12%, which indicates that rubbing-pair material has relatively decreasing influence on the wear of the cemented carbides. The main wear mechanism of the cemented carbides against granite with higher hardness is the plastic deformation of cobalt binder phase and the removals of some tungsten carbide grains, and scratching mainly occurs in the cemented carbides against granite with lower hardness.

关 键 词：硬质合金 摩擦磨损性能 摩擦因数 质量损失 

分 类 号：TH117.1[机械工程—机械设计及理论]