Process for preparing fine-grained rolled aluminum products

US4483719A · kind A · utility

Assignee

• Swiss Aluminium Ltd. · CH

Inventors

• Peter Furrer · Pfungen, CH
• Jurgen Timm · Seevetal, DE
• Frank Wehner · Singen, DE

Key dates

• Filing date: Sep 30, 1983
• Grant date: Nov 20, 1984
• Expiry date: Sep 30, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for the preparation of a rolled aluminum product, containing iron as the predominant alloy element, which has a grain size of less than 10 .mu.m after annealing to at least 250.degree. C., in which an alloy consisting of 0.8 to 1.5% iron, up to 0.5% by weight of each of Si and Mn, the sum of Si and Mn being between 0.2 and 0.8%, up to 0.3% by weight of any other component, the total of other components being no more than 0.8% by weight, and the remainder being aluminum, is casted at a solidification rate of 2.5 to 25 cm/min, the hot plate is cooled to less than 120.degree. C. at a rate of less than 0.5 K/sec and is then cold rolled with a thickness decrease of at least 75% without intermediate annealing, and the final annealing temperature does not exceed 380.degree. C.