High Strength Hot Dip Galvanized Steel Sheet Having Excellent Plating Quality, Steel Sheet For Plating, And Methods For Manufacturing Same

Abstract: The present invention relates to a high-strength hot-dip galvanized steel sheet having excellent plating quality, a steel sheet for plating for manufacturing same, and methods for manufacturing the steel sheets. The steel sheet for plating according to an aspect of the present invention has a GDS profile of an Mn component, as observed in the depth direction from the surface, sequentially including a maximum point and a minimum point, wherein a difference (a converted concentration difference of Mn) between a value, obtained by dividing the concentration of Mn at the maximum point by the concentration of Mn of a base material, and a value, obtained by dividing the concentration of Mn at the minimum point by the concentration of Mn of the base material, may be 80% or more, and a difference (a converted concentration difference of Si) between a value, obtained by dividing the concentration of Si at the maximum point by the concentration of Si of the base material, and a value, obtained by dividing the concentration of Si at the minimum point by the concentration of Si of the base material, may be 50% or more. However, when no minimum point appears within a depth of 5 µm, a point at a depth of 5 µm is denoted as the point at which the minimum point appears.

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