奥氏体中锰钢的冲滚磨料磨损性能研究  

Research on the Impact and Rolling Abrasive Wear Properties of Austenitic Medium Manganese Steel

作　　者：李勇[1] 王斐 崔文[1] 王庆良[1] 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116 [2]天津威尔朗科技有限公司,天津300385

出　　处：《润滑与密封》2016年第5期43-47,共5页Lubrication Engineering

基　　金：国家科技支撑计划项目(2013BAEL3B00);国家自然科学基金项目(51275514)

摘　　要：为寻找一种中低冲击载荷下具有良好耐磨性能的奥氏体中锰钢,以提高刮板输送机中部槽的耐磨性能和使用寿命,选择热轧奥氏体中锰钢Mn8,利用M2000摩擦磨损试验机研究其冲击滚动磨料磨损性能;结合SEM、XRD和TEM等测试手段,分析Mn8钢的磨损和强化机制。研究表明:在相对较低的冲滚载荷下,Mn8钢就能形成一定厚度的硬化层,且硬化层的厚度和耐磨性随载荷的增大而增大,同时体积磨损率变低。Mn8钢的磨损机制为凿削、犁沟等塑性变形以及交变应力导致的疲劳脆性剥落;Mn8钢的加工硬化机制是产生了高密度的位错缠结塞积(位错胞、层错)、形变诱导马氏体以及形变孪晶,从而使其在磨损过程中得到强化。In order to find a good wear-resisting austenitic manganese steel to improve the wear resistance and service life of scraper conveyor,the austenitic medium manganese Mn8 steel was selected,and its impact and rolling abrasive wear properties were investigated by a M2000 tribometer. Wear and work hardening mechanism of Mn8 steel were analyzed with SEM,XRD and TEM. The results show that a hardened layer with a certain thickness is formed on the worn surface when under lower impact loads. With the increasing of impact loads,the thickness and wear resistance of hardened layer are improved and the volume abrasion rate is decreased. The wear mechanism during the tests is plastic deformation of drilling and plowing wear,as well as fatigue fracture. The formation of high density dislocations,strain induced martensite and deformed twins is the hardening mechanism of Mn8 steel,leading reinforced high wear resistance.

关 键 词：中锰钢 马氏体相变 磨损 加工硬化机制 

分 类 号：TH117[机械工程—机械设计及理论]