Galvannealed steel sheets exhibiting excellent press die sliding

Details Galvannealed steel sheets exhibiting excellent press die sliding Galvannealed steel sheets exhibiting excellent press die sliding

1992-10-28

1994-06-28

Zimmerman, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428687, 428939, C23C 206, B32B 300, B32B 1518

Patent

active

053245946

ABSTRACT:
In a hot-dip zinc-coated 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 .mu.m to 1.4 .mu.m, 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:

REFERENCES:
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patent: 4775599 (1988-10-01), Matsuoka et al.
patent: 4798772 (1989-01-01), Furukawa
patent: 5011744 (1991-04-01), Saito et al.
patent: 5019460 (1991-05-01), Yasuda et al.
patent: 5182171 (1993-01-01), Aoyama et al.
"Surface Texture (Surface Roughness, Waviness, and Lay)", American National Standard Institute, The American Society of Mechanical Engineers, New York, N.Y. ANSI/ASME B46.1-1985, pp. 32, 37.
H. Burst et al., "Hot-Dip Galvanized Sheet Steel in Automobile Manufacturing", Industrial Heating, Oct. 1981, pp. 39-40.

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