Anti-oxidation property of 88WC-12Co coating prepared by high velocity oxy-fuel spraying
LIU Baogang, MA Qilin, LIU Chao, PENG Xinke, ZHU Xiaoyun, JI Qing
School of Energy and Electromechanical Engineering, Hunan University of Humanities, Science and Technology,Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, Loudi 417000, China
Abstract：A high density 88WC-12Co coating was prepared on the surface of 45# steel by high velocity oxy-fuel (HVOF). The microstructures, phases, and micro-hardness of the coatings after spraying and oxidation were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and micro-hardness tester respectively. The oxidation mechanism of the coating material was also discussed. The results show that 88WC-12Co coating has excellent oxidation resistance under 500 ℃, and the micro-hardness of the coating changes little after oxidation. However, the WO3 and CoWO4 phases significantly increased above 500 ℃, and the oxidation resistance and micro-hardness of the coating decreased obviously. The oxidation mechanism of the coating materials is that WC, W2C and Co in the coating react with O2 in the air to form WO3 and CoWO4 under high temperature.
刘宝刚, 马启林, 刘超, 彭馨可, 朱肖运, 季晴. 超音速火焰喷涂88WC-12Co涂层的抗氧化性能[J]. 粉末冶金材料科学与工程, 2018, 23(4): 422-426.
LIU Baogang, MA Qilin, LIU Chao, PENG Xinke, ZHU Xiaoyun, JI Qing. Anti-oxidation property of 88WC-12Co coating prepared by high velocity oxy-fuel spraying. Materials Science and Engineering of Powder Metallurgy, 2018, 23(4): 422-426.
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2018, Vol. 23 
