Patent ID: 10953631

Abstract:
There is provided a hot-dip galvanized steel sheet with a microstructure in a ⅛ thickness to ⅜ thickness range whose middle is a ¼ thickness from a surface of a base steel sheet, the microstructure contains ferrite phase is 50% or more and 97% or less by volume fraction, and a predetermined phase wherein at an interface between a hot-dip galvanizing layer and the base steel sheet, a Fe—Al alloy layer has an average thickness of 0.1 μm to 2.0 μm, and a difference between a maximum thickness and a minimum thickness in a steel sheet width direction is within 0.5 μm, and in a fine-grain layer directly brought into contact with the Fe—Al alloy layer, the fine-grain has a difference between a maximum thickness and a minimum thickness of the fine-grain layer in the steel sheet width direction is within 2.0 μm.