Patent · US Active

Aluminum alloy strip with improved surface appearance

US11260439B2 · kind B2 · utility

1Cited by

6References

3Claims

0Family size

Assignee

Hydro Aluminum Rolled Products GmbH · DE

Inventors

Dieter Bögershausen · Grevenbroich, DE
Jochen Schwarz · Ginsham, DE
Bernhard Kernig · Cologne, DE
Kathrin Eckhard · Cologne, DE
Axel Blecher · Niederkassel, DE
Olaf Güßgen · Langenfeld, DE

Key dates

Filing date	Jul 31, 2014
Grant date	Mar 1, 2022
Priority date	—
Expiry date	Dec 27, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31678
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to an aluminum alloy strip with improved surface optics, which is fabricated via hot and/or cold rolling, and consists of a type AA 3xxx, AA 5xxx, AA 6xxx or AA 8xxx aluminum alloy. The object of proposing an aluminum alloy strip that is suitable for attractive and precious surface optics despite the elevated percentage of alloy constituents is achieved in that, after degreasing, the finish-rolled aluminum alloy strip exhibits an increase in the luminance value L*(ΔL) in relation to the rolled-greasy state of more than 5 while measuring the color of the surface in the CIE L*a*b* color space using a standard illuminant D65 and a normal observation angle of 10°, excluding direct reflection in 45°/0° geometry.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.