Analysis of gas turbine coating cupping performance

Feng Wen, Li Zhengchao, and Xiang Xudong from Dongfang Steam Turbine Co., Ltd. introduced the research on the analysis of gas turbine coating cupping performance in their paper "Research on Cupping Performance Analysis of Gas Turbine Coatings". The author used HVAF spraying The gas turbine coating was prepared by two spraying processes, atmospheric plasma spraying and APS process, and the cupping performance of the coating was studied by a multifunctional testing machine. The following are the structure diagrams of the two Spray Guns

Experimental results

1) Through the cupping test, it is proved that the NiCr-Cr3C2 coating prepared by the HVAF process is superior to the NiCr-Cr3C2 coating prepared by the APS process in terms of the degree of bonding between the coating and the substrate, the structure and strength between the coatings.

2) The CuNiIn coating prepared by APS and HVAF process, the cupping test results all show that the coating is firmly bonded to the substrate.

suggestion

1) Select powder materials with different shapes and types to conduct APS and HVAF process tests, determine the application of domestic powders through cupping tests, improve the localization rate of gas turbine coatings, and reduce the coating quality under the premise of ensuring coating quality. Cost of production.

2) Conduct cupping test research on TBC (thermal barrier coating) in due course.