2NiB2三元硼化物，且隨著(Mo+B)/(Ni+Cr)質量比的增加，涂層中三元硼化物含量隨之增加，涂層的硬度值增加，結合強度反而隨之降低；由于涂層中三元硼化物的原位生成，MoB/NiCr涂層的硬度值均高于316L不銹鋼基體。通過能譜和XRD分析發(fā)現，經過360 h熔融鋅腐蝕試驗后，涂層表層中沒有發(fā)現鋅元素及其金屬間化合物，然而隨著(Mo+B)/(Ni+Cr)質量比的增加，涂層的孔隙率增加及厚度降低。最后，綜合分析可得，相比其他涂層，(Mo+B)/(Ni+Cr)質量比為1:1的MoB/NiCr涂層具有更好的耐熔融鋅腐蝕能力。;Three kinds of Mo-B-Ni-Cr ball-milled mixture powders with different (Mo+B)/(Ni+Cr) mass ratios (1:1, 2:1, and 3:1) were deposited by the high velocity oxygen-fuel (HVOF) spraying process to in situ synthesize MoB/NiCr coatings. The microstructure and phase composition of MoB/NiCr coatings were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD). The effects of different (Mo+B)/(Ni+Cr) mass ratios on the microstructure, microhardness, bonding strength, and corrosion resistance of MoB/NiCr coatings were discussed. The results show that MoB/NiCr coatings with (Mo+B)/(Ni+Cr) mass ratio of 1:1 have the lowest porosity and the largest thickness. Mo2NiB2 ternary boride was in situ synthesized in all three kinds of MoB/NiCr coatings. The content of Mo2NiB2 ternary boride is increased with increasing the (Mo+B)/(Ni+Cr) mass ratio. The microhardness of MoB/NiCr coatings is increased with increasing the (Mo+B)/(Ni+Cr) mass ratio, while the bonding strength is decreased. After immersion test in molten zinc for 360 h, no zinc or its intermetallic compound can be observed in the surface region of MoB/NiCr coatings according to energy disperse spectrometer (EDS) and XRD analyses. The porosity of the coatings is increased with increasing the (Mo+B)/(Ni+Cr) mass ratio, while the thickness is decreased. Compared with other coatings, the MoB/NiCr coating with (Mo+B)/(Ni+Cr) mass ratio of 1:1 has better corrosion resistance in molten zinc."/>
2NiB2三元硼化物;超音速火焰噴涂;組織結構;硬度;耐腐蝕;Mo2NiB2 ternary boride;high velocity oxygen-fuel;microstructure;microhardness;corrosion resistance"/>