Property of high-enthalpy plasma spraying Cr2O3·5SiO2·3TiO2/CoNiCrAlY gradient ceramic coating on the surface of the piston rod of the gate hoist
CHENG Xinchuang1, FU Li2,3, CHEN Xiaoming2,3, ZHAO Jian2,3, MAO Pengzhan2,3, LIU Wei2,3, ZHANG Lei2,3
1. Operation and Management Center of Cao’e River Sluice, Shaoxing 321066, China; 2. Key Laboratory of Surface Engineering of Equipment for Hydraulic Engineering of Zhejiang Province , Standard & Quality Control Research Institute, Ministry of Water Resources, Hangzhou 310012, China; 3. Water Machinery and Remanufacturing Technology Engineering Laboratory of Zhejiang Province, Hangzhou Mechanical Design Research Institute, Ministry of Water Resources, Hangzhou 310012, China
Abstract：In order to solve the problem of the wear of the piston rod of the gate hoist during the Cao’e river sluice, the high-enthalpy plasma spraying technology was used to prepare a gradient ceramic coating with a bonding layer of CoNiCrAlY and a surface layer of Cr2O3·5SiO2·3TiO2. The microstructure, microhardness, porosity, bonding strength, impact toughness, and wear resistance of the CoNiCrAlY/Cr2O3·5SiO2·3TiO2 coating were characterized and analyzed, and the wear mechanism of the ceramic coating was also analyzed. The results show that the average porosity of the coating is about 0.52%, the average microhardness is about 1 334.6 HV0.2, the average bonding strength is 61.7 MPa, and the friction and wear resistance is about 87.4 times that of the base 45# steel. The Cr2O3·5SiO2·3TiO2 coating has excellent anti-wear properties. The wear mechanism of Cr2O3·5SiO2·3TiO2 coating is abrasive wear, fracture and peeling. The CoNiCrAlY/Cr2O3·5SiO2·3TiO2 coating has achieved good application effects on the piston rod of the gate hoist of Cao’e River.
程新闯, 伏利, 陈小明, 赵坚, 毛鹏展, 刘伟, 张磊. 启闭机活塞杆表面高焓等离子喷涂Cr2O3·5SiO2·3TiO2/CoNiCrAlY梯度陶瓷涂层性能[J]. 粉末冶金材料科学与工程, 2021, 26(5): 436-441.
CHENG Xinchuang, FU Li, CHEN Xiaoming, ZHAO Jian, MAO Pengzhan, LIU Wei, ZHANG Lei. Property of high-enthalpy plasma spraying Cr2O3·5SiO2·3TiO2/CoNiCrAlY gradient ceramic coating on the surface of the piston rod of the gate hoist. Materials Science and Engineering of Powder Metallurgy, 2021, 26(5): 436-441.
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2021, Vol. 26 
