| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a manufacturing method of a steel sheet for hot dip galvanizing capable of obtaining a steel sheet for hot dip galvanizing having no spangle irregularities on the surface, by a simple manufacturing method not requiring a special device or step.SOLUTION: In a manufacturing method of a steel sheet for hot dip galvanizing, a cold rolled steel sheet having such a distribution of the irregularity size on the steel sheet surface that a ten-point average roughness (Rz) is 1-5μm and a center line average roughness (Ra) is 0.1-1.5μm is supplied to the final stand of cold tandem rolling, and the final stand rolls it in a dull roll with a rolling load of 4.0 kN/mm or less and over 0 kN/mm.</p> |
