Influences of Cu in Steel on the Formation of Alloy Layer in Hot-dip Galvanizing

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著者

    • KOMATSU Atsushi
    • Coating and Coated Products Laboratory-1, Surface Treatment Department, Steel and Technology Development Laboratories, Nisshin Steel Co., Ltd.
    • ANDO Atsushi
    • Coating and Coated Products Laboratory-1, Surface Treatment Department, Steel and Technology Development Laboratories, Nisshin Steel Co., Ltd.
    • KITTAKA Toshiharu
    • Coating and Coated Products Laboratory-1, Surface Treatment Department, Steel and Technology Development Laboratories, Nisshin Steel Co., Ltd.

抄録

The influence of Cu in steel on hot-dip galvanizing of hot rolled steel was studied. We investigated the formation of the alloy layer formed at the overlay-substrate interface. On Cu-Ti-added steel, the formation of δ<sub>1</sub> phase was promoted, while Fe<sub>2</sub>Al<sub>5</sub> was the main phase on the usual Ti-added steel. We concluded that this phenomenon was caused by the dissolution of Cu into the Zn bath that had deposited on the surface during pickling, and suggested that the dissolution of Cu should decrease the activity of Al and make Fe<sub>2</sub>Al<sub>5</sub> less stable than that of Ti-added steel, which caused the easy precipitation of δ<sub>1</sub>.

収録刊行物

  • ISIJ international

    ISIJ international 37(3), 283-289, 1997-03-15

    The Iron and Steel Institute of Japan

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