汽车用热镀锌板Fe-Al合金层的研究

Study on Fe-Al Alloy Layer in Hot-Dipping Galvanized Steel Sheet for Cars

用X射线衍射、萃取碳复型样品的电子衍射、金属薄膜等方法对汽车用热镀锌板Fe－Al合金的组织结构进行了分析，结果表明，当锌液中的Al浓度小于0．15％时，Fe－Al层主要由Fe2Al5金属间化合物组成。在此基础上用EET理论对组成Fe－Al层的主要物相Fe2Al5金属间化合物晶体的结合能进行了计算。

The phase structure of Fe-Al alloy tayer of hot-dipping galvanind steel sheet for carswere studied using X-Ray diffraction, electron diffraction of extraction carbon replica and metal film andresults indicate that the Fe-Al layer is maiuly Fe2Al5 intermetailic compounds when Al is less than0.15% in Zn bath.The cohesive energy of Fe2Al5 crystals has heen calculated according EET (empiricaleledron theory of solids and molecules).