【摘要】 利用ＳＥＭ和ＥＰＭＡ研究了含０．２２％Ｓｉ钢板在含镍０．３％以下的几种锌浴中获得的镀层组织。研究结果表明：当锌浴含镍大于０．０７％时，ζ相层变薄而晶粒细化，ζ相柱状晶的晶间和ζ相前沿的η相中出现镍富集；当锌浴中镍含量≥０．２％，在η相中析出ＺｎＦｅＮｉ金属间化合物Γ２相的晶粒。文中还根据ＺｎＦｅＮｉ三元相图，探讨了锌浴加镍后镀层组织变化的原因更多还原

【Abstract】 The microstructure of hot dip galvanized coatings of the steel sheet containing 0.22%Si by dipping in several zinc baths containing 0～0.3%Ni was studied by using SEM and EPMA. The result showed that, adding 0.07～0.12%Ni into the zinc bath, the ζ layer is thinned and the ζ crystal is fined, Ni is rich in the boundary of the columnar crystal of ζ layer and in the η phase in front of the ζ layer. Adding equal to or greater than 0.20%Ni into the zinc bath, some particles of Zn Ni Fe intermetallic compound are precipitated in the η layer. The reason that the coating microstructure is changed after adding Ni into the zinc bath is also discussed according to Zn Ni Fe ternary diagram.更多还原