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材料工程  2012 

微缺陷对热喷涂涂层接触疲劳性能的影响

, PP. 72-76

Keywords: 等离子喷涂,微缺陷,失效模式,接触疲劳寿命,Weibull分布

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Abstract:

采用超音速等离子喷涂设备在45号钢基体上制备了三种含有不同微缺陷的NiCrBSi合金涂层。使用球盘式接触疲劳实验机对涂层的接触疲劳性能进行了测试,建立了Weibull失效概率图;使用扫描电子显微镜对涂层的微观结构和失效形貌进行了表征;比较了三种涂层的接触疲劳寿命及涂层的主要疲劳失效模式。结果表明,涂层内的微缺陷主要由微孔隙和微裂纹构成,涂层接触疲劳寿命的长短与这些微缺陷含量的多少成反比,涂层的孔隙率为2.5%,1.3%和21%,对应的接触疲劳寿命分别为7.77?105,8.99?105,7.81?105周次。同时,涂层微缺陷含量较少时涂层的失效模式主要以剥落失效为主;涂层微缺陷含量较多、结合强度较差时主要以分层失效为主;涂层内存在较大的孔隙可致使涂层的提早失效,同时涂层表面磨损失效的概率增加。

References

[1]  徐滨士, 朱绍华. 表面工程的理论与技术[M]. 2版. 北京: 国防工业出版社, 2010.
[2]  STEWART S, AHMED R, ITSUKAICHI T. Contact fatigue failure evaluation of post-treated WC-NiCrBSi functionally graded thermal spray coatings[J]. Wear, 2004, 257(9-10): 962-983.
[3]  FUJII M, YOSHIDA A, MA J B, et al. Rolling contact fatigue of alumina ceramics sprayed on steel roller under pure rolling contact condition[J]. Tribology International, 2006, 39(9): 856-862.
[4]  束德林. 工程材料力学性能[M]. 北京: 机械工业出版社, 2003.
[5]  STEWART S, AHMED R. Rolling contact fatigue of surface coatings-A review[J]. Wear, 2002, 253 (11-12): 1132-1144.
[6]  SARIKAYA O. Effect of some parameters on micro-structure and hardness of alumina coatings prepared by the air plasma spraying process[J]. Surface and Coatings Technology, 2005, 190(2-3): 388-393.
[7]  李长久,徐滨士.中国材料工程大典(16卷)——材料表面工程(上)[M]. 北京:化学工业出版社, 2006.
[8]  吴子健. 热喷涂技术与应用[M].北京: 机械工业出版社, 2006.
[9]  IWASZKO J. Surface remelting treatment of plasma-sprayed Al2O3 + 13 wt% TiO2 coatings[J]. Surface and Coatings Technology, 2006, 201(6): 3443-3451.
[10]  ZHANG X C, XU B S, XUAN F Z, et al. Statistical analyses of porosity variations in plasma-sprayed Ni-based coatings[J]. Journal of Alloys and Compounds, 2009, 467(1-2): 501-508.
[11]  CHEONG Y S, REYNOLDS G K, SALMAN A D, et al. Modelling fragment size distribution using two-parameter Weibull equation[J]. International Journal of Mineral Processing, 2004, 74(Suppl):227-237.
[12]  SMAIL M, FAHIM A. Exploring generalized probability weighted moments, generalized moments and maximum likelihood estimating methods in two-parameter Weibull model[J]. Journal of Hydrology, 2004, 285(1-4):62-75.
[13]  ZHANG X C, XU B S, XUAN F Z, et al. Rolling contact fatigue behavior of plasma-sprayed CrC-NiCr cermet coatings[J]. Wear, 2008, 265(11-12): 1875-1883.
[14]  PIAO Z Y, XU B S, WANG H D, et al. Influence of undercoating on rolling contact fatigue performance of Fe-based coating[J]. Tribology International, 2010, 43(1-2): 252-258.
[15]  朴钟宇, 徐滨士, 王海斗, 等. 等离子喷涂铁基涂层的接触疲劳失效机理研究[J]. 材料工程, 2009, (11): 69-73.
[16]  ZHANG X C, XU B S, XUAN F Z, et al. Failure mode and fatigue mechanism of laser-remelted plasma-sprayed Ni alloy coatings in rolling contact[J]. Surface and Coatings Technology, 2011, 205(10): 3119-3127

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