Litho strip with high cold-rolling pass reduction

US10696040B2 · kind B2 · utility

Assignee

• Hydro Aluminum Rolled Products GmbH · DE

Inventors

• Christoph Settele · Mönchengladbach, DE
• Bernhard Kernig · Cologne, DE
• Jochen Hasenclever · Bonn, DE
• Gerd Steinhoff · Bonn, DE

Key dates

• Filing date: Oct 19, 2018
• Grant date: Jun 30, 2020
• Expiry date: Oct 19, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21B2003/001
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Provided is a method for production of an aluminium strip for lithographic printing plate supports from an aluminium alloy including (in wt %): 0.05%≤Si≤0.25%, 0.2%≤Fe≤1%, Cu max. 400 ppm, Mn≤0.30%, 0.10%≤Mg≤0.50%, Cr≤100 ppm, Zn≤500 ppm, Ti<0.030%, the remainder aluminium and unavoidable impurities individually at most 0.03%, in total at most 0.15%. In the method, a rolling ingot is cast from an aluminium alloy, and the rolling ingot is homogenised. Further, the rolling ingot is hot rolled to a hot strip final thickness, and the hot strip is cold rolled to final thickness of between 0.1 mm and 0.5 mm. The product of the relative final thicknesses of the aluminium strip after the first and after the second cold rolling pass of the aluminium strip is 15% to 24%.