一种高碳钢低温干摩擦行为的研究  

Study on Tribological Behavior of 1.08%C steel under Dry Friction at Low Temperature

作　　者：王鸿灵[1,2] 阎逢元[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院研究生院,北京100039

出　　处：《摩擦学学报》2008年第5期469-474,共6页Tribology

基　　金：国家自然科学基金重点资助项目(50432020)

摘　　要：在20℃至-55℃范围内以球-盘摩擦形式考察了一种1.08%C高碳钢在滑动速度0.319 m/s,载荷在0.5～2.5 N下与GCr15钢球干摩擦时的摩擦磨损行为,利用SEM、EDS、XPS等观察了磨痕形貌,考察了磨屑中氧含量的变化,分析了摩擦氧化反应.结果发现,与常温环境相比,在0℃以下的低温环境显著提高了该钢铁摩擦副之间的摩擦系数,且摩擦系数基本不随温度发生变化.随着温度的降低该高碳钢的磨损量增加,黏着磨损程度增强,屑中氧含量减小.分析认为温度的降低伴随着湿度的降低,低温、低湿度环境减弱了摩擦氧化反应,减少了起隔离作用的金属氧化物的生成,加剧了摩擦副之间的黏着,从而导致摩擦系数和磨损量增大.Triological behavior of 1.08% C steel under temperature range of -55 ℃ ～ 20℃ and dry friction was investigated using a tribometer with ball-on-disk configuration. The counterbody was φ3 mm GCr15 steel ball. The normal load was 0.5 N N2.5 N and the sliding velocity was 0. 319 m/s. Worn surface on the 1.08% C steel was observed by SEM. Chemical composition of the debris was analysised by EDS and XPS. Hardness of the worn surfaces was measured. Friction coefficient below 0 ℃ was obviously higher than that of 20 ℃. Drop of temperature obviously aggravated the wear of 1.08% C steel. Analysis on tribochemical reaction indicates that weakened oxidation of wear debris with drop of temperature was an important reason for aggravation of wear. Decrease of oxide in the debris increased adhesion between the two metals.

关 键 词：低温 高碳钢 干摩擦 摩擦氧化反应 

分 类 号：TH117.3[机械工程—机械设计及理论]