曲轴材料48MnV钢及其具有3Cr13电弧喷涂涂层的疲劳行为  

Fatigue Behavior of Crankshaft Material 48MnV Steel with/without a 3Cr13 Arc Spraying Coating

作　　者：张国庆[1,2] 王成焘[3] 

机构地区：[1]台州职业技术学院机电工程学院,浙江台州318000 [2]浙江宝石缝纫机(控股)集团有限公司博士后工作站,浙江台州318000 [3]上海交通大学动力与机械工程学院,上海200240

出　　处：《材料科学与工程学报》2011年第3期448-454,共7页Journal of Materials Science and Engineering

基　　金：国家自然科学基金重点资助项目(50235030)

摘　　要：汽车发动机再制造中,采用电弧喷涂技术修复曲轴具有一定的潜在应用价值,本文对曲轴材料48MnV钢及其具有3Cr13电弧喷涂涂层的疲劳行为进行了研究。选用标准48MnV钢材料及其具有不同厚度涂层的试样进行拉伸和疲劳试验,计算了其疲劳极限并加以分析比较,同时对断口做了分析。发现基体材料为48MnV钢,具有3Cr13电弧喷涂层的试样在轴向载荷下的疲劳性能有相当程度的降低。涂层越厚,疲劳性能越差,疲劳极限越低。疲劳性能降低的主要原因是涂层的结合强度较小,以及喷砂时残留的铝氧化物引起疲劳裂纹萌生。When automotive engines are remanufactured the use of electric arc spraying technique to repair the crankshafts has some potential applications and value.This paper studied the fatigue behaviors of crankshaft material 48MnV steel with/without an arc sprayed 3Cr13 coating.Standard specimens of 48MnV steel and the specimens with different thickness of the coatings are used for tensile and fatigue test.The fatigue limit is calculated and compared,and the fracture was analyzed.It is found that the fatigue performance of 48MnV steel substrate with a 3Cr13 arc spray coating is substantially reduced in the axial load.The thicker the coating,the worse the fatigue performance,and the lower the fatigue limit.Fatigue performance degradation is mainly due to the lower bonding strength and residual aluminum oxide sandblastings which cause the fatigue crack initiation.

关 键 词：再制造 48MnV钢 曲轴 电弧喷涂 疲劳 

分 类 号：TH112[机械工程—机械设计及理论]