Silt Erosion Characteristics of a Cr3C2-NiCr Coating Fabricated by High Velocity Oxy-Fuel (HVOF) Thermal Spray
A Cr3C2-NiCr coating was prepared by high velocity oxy-fuel (HVOF) thermal spray on 1Cr18Ni9Ti stainless steel. Phases and microstructures of the coating were investigated by X-ray diffraction (XRD), optical microscopy (OM) and scanning election microscopy (SEM), respectively. The cavitation erosion resistance and silt erosion resistance of the coating were evaluated using a GB/T6383-2009 standard method in two experimental conditions (fresh water and water contained fine silt), compared with the coatings hydro machine material lCrl8Ni9Ti stainless steel. The coating shows a layered structure and has a significantly higher microhardness (11.97 GPa) than that of the lCrl8Ni9Ti stainless steel (2.1 GPa), which results in less mass losses both in cavitation erosion and silt erosion experiment. The HVOF coating has a predominant performance in the cavitation erosion and silt erosion resistance. The higher microhardness of the coating is the main cause which results in a less mass losses in the erosion experiments. And the mass loss usually happens at the edges of the pores.
Cr3C2-NiCr coating cavitation erosion silt erosion
Wang Qian Wu Yuping Li Gaiye Guo Wenmin He Zhihua Hong Sheng
Hohai University, Nanjing 210098, China
国际会议
西安
英文
453-455
2011-05-11（万方平台首次上网日期，不代表论文的发表时间）