Research Progress on Fatigue Life of HVOF Tungsten Carbide Cermet Coating
RARE METAL MATERIALS AND ENGINEERING(2021)
摘要
High velocity oxygen fuel (HVOF) sprayed WC cermet coating possesses 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 initiation 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 preparation. The improvement measures include coating gradient design, change of the pre-treatment such as shot peening replacing grit blasting, obtaining or increasing the coating compressive stress, reducing the decomposition of carbide, reasonable process parameters (such as high speed), proper coating thickness, applying WC powder with high content of binder, appropriate post-treatment of the coating.
更多查看译文
关键词
HVOF (high velocity oxy-fuel), tungsten carbide coating, fatigue, research status
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要