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研究了在锌池中依次添加0.1%Zr、0.1%Co、0.1%Ni、0.1%V微合金化元素对含硅结构钢热浸镀锌性能的影响,并结合扩散通道理论解释了合金元素及其协同作用对硅反应性抑制的机理。研究表明,锌池中添加0.1%Zr或0.1%Co+0.1%Zr时,会在ζ层外侧形成少量不连续的Zn-Fe-Zr或Zn-Co-Zr三元化合物,但其只减薄了Sandelin钢镀锌时的镀层厚度,而对抑制高硅钢的硅反应性基本没有贡献。继续添加0.1%Ni后,Ni会在纯锌层与ζ层的界面上富集,可抑制Q235钢的硅反应性,但不能抑制Q345钢中的硅反应性。直到锌池中添加了0.1%Zr-0.1%Co-0.1%Ni-0.1%V后,才能很好的抑制Q345钢中的硅反应性。此时,在自由锌层与ζ层的界面上形成了明显的Zn-Fe-Ni-V化合物。通过扩散通道模型可以很好地解释这些实验现象。
The effect of adding 0.1% Zr, 0.1% Ni, 0.1% V microalloyed elements in turn on the hot-dip galvanizing properties of silicon-containing structural steel was studied. The effects of alloying elements and The mechanism of its synergic effect on silicon reactivity. The results show that a small amount of discontinuous Zn-Fe-Zr or Zn-Co-Zr ternary compounds are formed outside the ζ layer when 0.1% Zr or 0.1% Co + 0.1% Zr is added to the zinc bath, The thickness of the coating when Sandelin steel is galvanized does not substantially contribute to inhibiting the silicon reactivity of the high-silicon steel. After adding 0.1% Ni, Ni enriched at the interface of the pure zinc layer and the ζ layer, which can restrain the silicon reactivity of Q235 steel, but can not restrain the silicon reactivity in Q345 steel. The silicon reactivity in Q345 steel was well suppressed until 0.1% Zr-0.1% Co-0.1% Ni-0.1% V was added to the zinc bath. At this time, a distinct Zn-Fe-Ni-V compound was formed at the interface between the free zinc layer and the ζ layer. These experimental phenomena can be well explained by the diffusion channel model.