The Cr3C2-NiCrMoNbAl thermal spray powder was fabricated via agglomeration and sintering process,utilizing Cr3C2,Ni,Cr,Mo,Nb,and Al powders as the starting materials.Subsequently,the coating was prepared by employing the high-velocity oxygen-fuel(HVOF)spraying technology.The effect of atomizer speed and sintering temperature on the structure and properties of the powder was investigated by using sieving machine,scanning electron microscope,metallographic microscope,and X-ray diffractometer.Meanwhile,the thermal spray coating performance of the powder was also evaluated.The results revealed that as the atomizer speed increased,the powder particle size declined,and the particle size distribution range broadened.Furthermore,the powder sintered at 1 285℃ exhibited a more uniform metallographic structure,superior powder morphology,and a apparent density of 2.83 g/cm3.The thermal spray coating,which was fabricated by the synthesized Cr3C2-NiCrMoNbAl powder,demonstrated outstanding comprehensive performance with a microhardness(HV0.3)of 1 021±52,a porosity of 1.2±0.1％.
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