【作者】 邱明； 张永振； 杜三明； 上官宝； 陈跃； 铁喜顺； 孙乐民； 杨晓伟；

【Author】 QIU Ming, ZHANG Yong-zhen, DU San-ming, YANG Xiao-wei, ZHU Jun, ( Theory of Lubrication and Bearing Institute, Xi’an Jiaotong University , Xi’an 710049, China; College of Mechatronic Engineering, Henan University of Science & Technology, Luoyang 471003, China; College of Materials Science and Engineering, Henan University of Science & Technology, Luoyang 471003, China;)

【机构】 河南科技大学机电工程学院； 河南科技大学 材料科学与工程学院；

【摘要】 环境气氛的组成影响摩擦副的摩擦磨损行为．本文在氮气和氧气2种不同环境气氛条件下, 对CrNiMo钢与H96黄铜摩擦配副进行了高速(30～60 m／s)销盘摩擦磨损试验,并通过扫描电镜和能谱仪进行微观分析．结果表明,氧气气氛中CrNiMo钢的磨损率始终很低,而氮气气氛中CrNiMo 钢的磨损率明显比氧气气氛中的磨损率高。在氧气气氛中CrNiMo钢摩擦表面形成薄而致密的氧化膜是其磨损率保持较低值的主要原因,而在氮气气氛中CrNiMo钢摩擦表面形成厚而疏松的表面膜促使其磨损加剧。更多还原

【Abstract】 The atmosphere components have an influence on tribological behaviors of tribo-pairs. Through change the atmosphere component, the effect of atmosphere component on the tribological behaviors of steel against brass at high sliding velocity has been investigated. The wear test was carried out on a high-speed friction and wear test rig whose test atmosphere can be controlled. The tests had performed at four sliding velocities (30, 40, 50, 60 m/s), four different contact pressures (0.13, 0.67, 1 and 1.33 MPa) and two atmosphere components (N2 or O2). The morphologies of the worn surfaces of various pins were observed with a scanning electron microscope. The chemical compositions of the surfaces and sub-surfaces for steels were determined with an energy dispersion spectroscopy. The results show that the wear rate of the steel pins are low all the time with the sliding velocity increases in oxygen atmosphere, and that the wear rate of the steel pins in nitrogen atmosphere is higher than that of the steel pins in oxygen atmosphere. It was found that the thin and compact oxidation layer formed on the worn surface of the steel in oxygen atmosphere plays a key role in the wear resistance. However, the wear rate of the steel pins increase rapidly with the sliding velocity increases in nitrogen atmosphere, which is attributed to the thick and loose surface layer formed on the worn surface of the steel.更多还原