4Cr3Mo2NiV铸造热锻模具钢的高温磨损机理  

HIGH-TEMPERATURE WEAR MECHANISM OF CAST HOT-FORGING DIE STEEL 4Cr3Mo2NiV

作　　者：崔向红[1] 王树奇[2] 姜启川[1] 洪扁[2] 

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]江苏大学材料科学与工程学院,镇江212013

出　　处：《金属学报》2005年第10期1116-1120,共5页Acta Metallurgica Sinica

基　　金：国家计委产业化前期关键技术与成套设备研制开发项目 1999317;国家高技术发展计划项目2002AA331180资助

摘　　要：研究了铸造热锻模具钢4Cr3M02NiV从室温到600℃的磨损行为,采用SEM,XRD和EPMA等对试样磨损表面和磨屑的形貌、成分和结构进行了分析,探讨了铸造热锻模具钢的高温磨损机理.结果表明:铸造热锻模具钢的高温磨损机理是氧化磨损和疲劳剥层磨损.磨损过程中氧化和疲劳剥层交替进行,使摩擦系数大幅度波动.高温磨损形成的氧化物主要是Fe_2O_3和Fe_3O_4,氧化磨损使磨损率降低;疲劳剥层使磨损率增加,磨屑呈脆性块状.The wear behaviors of cast hot-forging die steel 4Cr3Mo2NiV were examined at a temperature range from RT to 600℃. The wear mechanism was clarified through analyzing the morphologies, compositions and structures of wear surface and wear debris, which were obtained by using SEM, XRD and EPMA. The results showed that the predominant mechanism of high temperature wear is oxidation wear and fatigue delamination, which alternately occur to make the coefficient of friction extensively undulate during wear processes. The oxides of wear surface are Fe2O3 and Fe3O4. The wear rate is reduced by oxidation wear, increased by fatigue delamination and the wear debrises are brittle lumps.

关 键 词：铸钢 热锻模 高温磨损 氧化 磨损机理 

分 类 号：TH117.1[机械工程—机械设计及理论]