HOT DIP PLATED STEEL SHEET HAVING EXCELLENT APPEARANCE QUALITY, AND PRODUCTION METHOD FOR THE HOT DIP PLATED STEEL SHEET

摘要

PROBLEM TO BE SOLVED: To provide an Al-Si-Zn based, Al-Mg-Si-Zn based, Si-Al based or Si-Mg-Al based plated steel sheet in which excellent appearance quality can be attained, and to provide a production method for the plated steel sheet.;SOLUTION: In the hot dip plated steel sheet having excellent appearance quality, the surface of a plated steel sheet is provided with a plurality of micro-recessed parts so that (1) the diameter d is controlled to 1 to 100 m, (2) the depth h of the recessed parts is controlled to 0.5 to 50 m, and (3) the occupancy ratio in the sheet surface by the recessed parts is controlled to 30 to 99%. The steel sheet is produced by performing skinpass rolling using skinpass rolls.;COPYRIGHT: (C)2004,JPO