A method for producing a hot-dip galvanized steel sheet having excellent press formability

• Main Authors: TAIRA, SHOICHIRO, KAWANO, TAKASHI, TADA, MASAKI, OOTSUKA, SHINJI, NAGOSHI, MASAYASU, ANDO, SATORU, SUGIMOTO, YOSHIHARU, HAMADA, ETSUO, YAMASHITA, MASAAKI
• Format: Patent
• Language: English; French; German
• Published: 17.06.2009
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

A hot-dip galvanized steel sheet includes a plating layer substantially composed of the · phase and an oxide layer disposed on a surface of the plating layer. The oxide layer has an average thickness of 10 nm or more and includes a Zn-based oxide layer and an Al-based oxide layer. A method for producing the hot-dip galvanized steel sheet includes a hot-dip galvanization step, a temper rolling step, and an oxidation step.