喷射成形高合金工具钢微动干摩擦磨损性能研究  

Study on Fretting Dry Friction and Wear Properties of Spray-formed High Alloy Tool Steel

作　　者：康少付[1] 刘允中[2] 

机构地区：[1]宁夏大学机械工程学院,宁夏银川750021 [2]华南理工大学机械与汽车工程学院,广东广州210640

出　　处：《热加工工艺》2013年第24期127-130,共4页Hot Working Technology

基　　金：宁夏大学科学研究基金(ZR1141)

摘　　要：在SRV-IV型摩擦磨损试验机上分别对喷射成形(SF)和电渣重熔(ESR)高合金工具钢与氮化硅(Si3N4)陶瓷球进行微动干摩擦磨损试验。利用SEM观察了磨斑的表面形貌并分析了其磨损机理。结果表明,与电渣重熔态材料相比,喷射成形态材料的耐磨性提高了47%;当载荷为100 N时,摩擦系数随着速度的增加先增大后减小;材料的磨损量随载荷和摩擦速度增大而增大。在较低载荷下,材料以磨粒磨损为主;随载荷的增加,磨损加剧,以磨粒磨损和粘着磨损为主;在较大载荷下,磨损机制转变为严重的氧化疲劳磨损和磨粒磨损。The fretting dry friction and wear tests of spray formed（SF） and electro-slag remelting（ESR） high alloy tool steels against silicon nitride（Si3N4） ceramic ball were carried on SRV IV fretting friction and wear tester.The wear scar surface morphology was observed by SEM and the wear mechanism was analyzed.The results show that the wear resistance of spray-formed material improves by 47% compared with electro-slag remelting material.The friction coefficient first increases and then decreases with the increase of velocity under the load of 100 N.The wear mass loss of the material increases with increasing load and friction velocity.The wear mechanism of spray-formed material is abrasive wear at lower load,and then the wear becomes seriously with increasing the load and the wear mechanism changes into abrasive wear and adhesive wear.The wear mechanism transforms into serious oxidation fatigue and abrasive wear at heavier load.

关 键 词：喷射成形 高合金工具钢 微动 干摩擦磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]