Residual Stress Characteristics of High Velocity Oxygen-Fuel MCrAlY Coatings.
Residual Stress Characteristics of High Velocity Oxygen-Fuel MCrAlY Coatings.
复制标题
高速氧燃料 MCrAlY 涂层的残余应力特性。
DOI：
10.2472/jsms.46.1057
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Masashi Takahashi
中科院分区：
文献类型：
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作者：
Y. Itoh;M. Saitoh;Masashi Takahashi
建立了空气中超音速火焰喷涂（HVOF）系统，用于制备洁净致密的涂层。认为超音速火焰喷涂MCrAlY（M为Ni、Co或Fe）涂层可用于防止燃气轮机热段的氧化和腐蚀。此外，众所周知，与任何其他热喷涂系统相比，可以喷涂更厚的涂层以改善残余应力。然而，HVOF涂层的热性能和力学性能一直没有得到很好的研究，本文对MCrAlY涂层的热性能和力学性能进行了研究。从结果中，它被证实，HVOF MCrAlY涂层的热性能和机械性能可以通过扩散热处理提高到真空等离子喷涂MCrAlY涂层的水平。另一方面，实验结果表明，HVOF涂层的残余应力降低喷丸效果相比，真空等离子喷涂涂层。
High velocity oxygen-fuel (HVOF) system in air has been established for producing the coatings that are extremely clean and dense. It is thought that the HVOF sprayed MCrAlY (M is Ni, Co or Fe) coatings can be applied to prevent oxidation and corrosion in the hot section of gas turbines. Also, it is well known that thicker coatings can be sprayed for improving the residual stress in comparison with any other thermal spraying system. However, the thermal and mechanical properties of HVOF coatings have not always been clarified.In this paper, the thermal and mechanical properties of MCrAlY coatings were measured in both cases of as sprayed and heat treated coatings. From the results, it is confirmed that the thermal and mechanical properties of HVOF MCrAlY coatings could be improved by a diffusion heat treatment up to the level of vacuum plasma sprayed MCrAlY coatings. On the other hand, the experimental results suggest that the residual stress of HVOF coatings is decreased by the shot-peening effect in comparison with the vacuum plasma sprayed coatings.