旋耕刀表面强流脉冲电子束改性后的耐磨性研究  

Wear Resistance of Rotary Tiller Blades Treated by High Current Pulsed Electron Beam

作　　者：陈亚茹 李晖[2] 

机构地区：[1]重庆机电职业技术学院机械工程系,重庆402760 [2]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《材料保护》2017年第8期84-88,共5页Materials Protection

基　　金：国家自然科学基金资助项目(51275548;51575073);国家国际科技合作专项(2015DFR70480)资助;重庆市科委资助项目(cstc2014yykfA70001;cstc2014gjhz70003)

摘　　要：为了提高农机零部件的主要磨损部件旋耕刀的耐磨性,延长其使用寿命,采用强流脉冲电子束表面改性技术处理旋耕刀常用材料60Si2Mn钢表面。采用金相显微镜分析形貌,通过显微硬度对比和摩擦磨损分析处理表面的性能,优选加速电压,将其作为优化参数作用于旋耕刀表面,并在土槽台架模拟工况试验。结果表明:电子束表面改性技术可以有效提高旋耕刀的耐磨性,对侧刃内侧处理要优于对侧刃外侧的处理;加速电压为30 kV和27 kV时,旋耕刀表面耐磨性较优,前者的磨损量较小。In order to improve the wear resistance and prolong life of rotary tiller blades,a strategy for surface modification using high current pulsed electron beam to treat the surface of the common material 60Si2Mn was presented.Metallographic microscope was used to analyze the mortphology and mierohardness and wear tests were used to compare and analyze the surface properties.The optimized accelerating voltage was selected to treat the rotary tiller blades and the simulation test was carried out on the soil-bin racks.Results showed that the surface modification technology of high current pulsed electron beam improved the wear resistance of rotary blades effectively and the treatment effect of the inside of the blade was better than that of the outside.The treated surface had good wear resistance when the voltage was 27 kV or 30 kV,and the former had the smaller wear loss than the latter.

关 键 词：旋耕刀 强流脉冲电子束 表面改性 60SI2MN钢 耐磨性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]