Mn对熔融Zn-Mn合金与X80钢润湿行为的影响

研究了锌液中0.1%~0.5%(质量分数)Mn对X80钢表面润湿行为的影响。采用改良座滴法获得了450℃时Zn-Mn合金的接触角，通过SEM/EDS观察分析样品表面及界面的组织结构，研究了Zn-χMn(χ=0.1~0.5)合金与X80钢基板的润湿行为和界面反应。结果表明：锰元素对锌合金与钢基体间的润湿性反应起到正吸附作用。在450℃时，当熔体中的锰含量为0.1~0.5时，Zn-χMn合金与钢基间的润湿接触角从85°减小到62°。锌合金熔体/X80钢属于反应性润湿体系，生成的界面产物由FeZn₁₀(δ)、FeZn₁₃(ζ)和Fe₃Zn₁₀(Γ)/Fe₅Zn₂₁(Γ₁)相组成，润湿行为受锌合金界面反应影响。在铺展三相线前沿存在前驱膜，前驱膜的出现能够促进润湿。

Effect of Mn on Wetting Behavior of X80 Steel in Molten Zn-Mn Alloy

The effect of the addition of Mn in the range of 0.1%~0.5% (mass fraction) in molten Zn-Mn alloys at 450℃on the surface wetting behavior of X80 steel was studied by means of contact angle measurement with an improved sessile drop method and microstructure observation with SEM-EDS in terms especially of the interaction at interface molten Zn-χMn(χ=0.1~0.5) alloys/X80 steel substrate. The results show that Mn can play a positive role in the wettability between the molten Zn alloy and the steel. At 450℃, with the increasing Mn content from 0.1 to 0.5, the wetting contact angle between the molten Zn-χMn alloy and the steel decreases from 85° to 62°. The molten Zn alloy/X80 steel belongs to the reactive wetting system, correspondingly, the interface reaction may result in interface products composed of FeZn₁₀(δ), FeZn₁₃(ζ) and Fe₃Zn₁₀(Γ)/Fe₅Zn₂₁(Γ1) phases. Therefore, the wetting behavior is affected by the interface reaction. There is a precursor film emerged at the front of the three-phase line, which can enhance the wettability of the molten Zn alloy to X80 steel.