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HVOF碳化钨金属陶瓷涂层对基体疲劳性能影响的研究现状
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1.西北工业大学;2.河南工程学院;3.西北有色金属研究院

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基金项目:

国家自然基金(51975480);航天联合基金(U1737205)


Research Status of Effect of HVOF Tungsten Carbide Coating on Fatigue Properties
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Northwestern Polytechnical University

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    摘要:

    由超音速火焰喷涂(HVOF)制备的碳化钨金属陶瓷涂层,具有接近完全致密、结合强度高、硬度高等优势。本文综述了金属表面HVOF碳化钨金属陶瓷涂层疲劳寿命影响的研究现状,并分析了产生疲劳裂纹的原因,影响疲劳寿命的原因有涂层与基体的性能差异、喷砂引入的缺陷、残余应力及涂层制备工艺等的影响。改进措施有涂层设计、基体不做喷砂或喷丸替代喷砂等改变前处理工艺、获得或提高涂层压应力、减少碳化物的分解、合理的工艺参数(如高的速度)、合适的涂层厚度、选用高含量粘结物的碳化钨金属陶瓷粉末、合适的涂层后处理方法等措施。

    Abstract:

    HVOF ( high velocity oxygen fuel) sprayed WC cermet coating possess high hardness, high bonding strength and nearly full-density, which are the candidates of EHC(electrolytic hard chromium). In the present paper, the research status quo of the influence of HVOF sprayed WC coating on the fatigue life of the substrate was summarized and the reasons of crack invitation and fatigue life decrease were also analyzed. The factors affecting the fatigue life are as follows: the difference between the coating and the substrate in properties, the defects introduced by grit blasting, residual stress and coating gradient design, shot peening replacing grit blasting and could be adopted in order to improve or increase the fatigue life of substrate.

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姬寿长,李京龙,陈丹,李争显,杨海彧. HVOF碳化钨金属陶瓷涂层对基体疲劳性能影响的研究现状[J].稀有金属材料与工程,2021,50(12):4539~4552.[Ji Shouchang, Li Jinglong, Chen Dan, Li Zhengxian, Yang Haiyu. Research Status of Effect of HVOF Tungsten Carbide Coating on Fatigue Properties[J]. Rare Metal Materials and Engineering,2021,50(12):4539~4552.]
DOI:10.12442/j. issn.1002-185X.20210656

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  • 收稿日期:2021-07-22
  • 最后修改日期:2021-09-03
  • 录用日期:2021-09-03
  • 在线发布日期: 2022-01-09
  • 出版日期: 2021-12-24