张志强,李国禄,王海斗,徐滨士,张国胜,朴钟宇

• 1:天津工程机械研究院再制造与工艺材料研究所
• 2:河北工业大学材料科学与工程学院
• 3:装甲兵工程学院装备再制造技术国防科技重点实验室

摘要(Abstract)：

使用超音速等离子喷涂设备在45钢基体上制备了Fe基合金涂层,采用扫描电镜、透射电镜等设备对涂层组织结构进行了表征。以球盘式接触疲劳试验机为平台,考察了涂层在1.58、1.84、2.04 GPa 3种应力水平下的接触疲劳寿命。采用Weibull概率统计方法处理离散的接触疲劳寿命数据,建立了Weibull失效概率统计模型和失效概率-应力-疲劳寿命(P-S-N)曲线图。结果表明,涂层结构致密且呈典型的层状结构,涂层粒子结合界面平整;涂层粒子内部析出弥散分布的点状碳化物,而在边界处析出连续分布的片状碳化物;涂层微裂纹周围分布有强韧性极高的纳米晶;根据建立的Weibull失效概率统计模型和P-S-N曲线图,可以有效地预测涂层的接触疲劳寿命。

关键词(KeyWords)： Fe基合金涂层;接触疲劳;组织结构;疲劳寿命

Abstract:

Keywords:

基金项目(Foundation): “十二五”国家科技支撑计划课题(2011BAF11B08);; 国家杰出青年科学基金(51125023)

作者(Author): 张志强,李国禄,王海斗,徐滨士,张国胜,朴钟宇

DOI: 10.13289/j.issn.1009-6264.2013.09.032

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