Hot-dip zinc-coated steel sheets exhibiting excellent press...

Details Hot-dip zinc-coated steel sheets exhibiting excellent press... Hot-dip zinc-coated steel sheets exhibiting excellent press...

C - Chemistry, Metallurgy

23

C

C23C 2/26 (2006.01)

Patent

CA 2081645

In a galvannealed steel sheet exhibiting excellent press die sliding characteristics and obtained by performing a molten galvanization and then skin pass rolling on a surface of the steel sheet, a galvanized layer has a three-dimensional average surface roughness ranging from 0.7 µm to 1.4 µm, and a skewness S of the amplitude probability distribution of the surface roughness, which is defined by the following equation (1), ranging from 0.1 to -0.3: S = µ3/.sigma.3 where µ3: Three-dimensional moment of the amplitude probability density .sigma.: Standard deviation of the amplitude probability density

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