腐蚀条件下不同Ni、Mn含量衬板钢冲击磨损性能研究  

Impact wear resistance of liner steel with different contents of Ni and Mn under corrosive condition

作　　者：王义飞[1] 杜晓东[1] 王家庆[1] 孔明光[2] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]中国科学院固体物理研究所材料物理重点试验室,安徽合肥230031

出　　处：《金属热处理》2008年第5期5-8,共4页Heat Treatment of Metals

基　　金：教育部博士点基金项目(20040359004);安徽省科技厅科研基金重点项目(KJ2007086)

摘　　要：为优化衬板钢成分,调整了低碳高合金湿磨衬板钢中Ni、Mn含量,采用改进的MLD-10型冲击磨损试验机研究其在铁矿石酸性矿浆中冲击功为2.0J情况下冲击磨损行为,采用金相显微镜、扫描电子显微镜观察分析合金组织、亚表层金相组织及冲击腐蚀磨损表面形貌,并对合金组织和在腐蚀环境下的冲击磨损机制进行了探讨。结果表明,含2.0wt%Ni的衬板钢具有最佳的抗冲击磨损性能,磨损机制主要为腐蚀条件下的浅层块状疲劳剥落;含1.0wt%Ni、1.5wt%Mn的衬板钢具有最高的性价比,磨损机制也为浅层块状疲劳剥落,但程度略大;含2.0wt%Mn的衬板钢的磨损机制主要为深层脆性剥落。The content of Ni and Mn of the low carbon high alloy liner steel was modified to optimize its component. Impact wear properties of the liner in acid iron ore mud were investigated by MLD-10 impact-corrosion-wear tester with an impact energy of 2.0J. The microstructures of the liner steel and its sub-layer and morphologies of the impact wear surface were observed by microscope and SEM. The mechanism of impact wear under corrosive conditions was studied. The results show that the liner steel containing 2.0wt% Ni has higher impact-wear resistance than the steels containing 1% Ni, 1.5wt% Mn and 2.0wt% Mn, and is worn mainly by shallow fatigue flaking. The liner steel containing 1% Ni and 1.5wt% Mn has higher ratio of performance to cost, the dominant wear mechanism is also fatigue with shallow flaking, but a little more deep. The dominant wear mechanism of the liner steel with 2.0wt% Mn is heavy brittle spalling.

关 键 词：衬板钢 冲击磨损 性价比 磨损机制 

分 类 号：TG142.72[一般工业技术—材料科学与工程] TG113.2[金属学及工艺—金属材料]