Twin-roll Casting of High-strength Age-hardened Aluminium Alloys  Full text 

O. Grydin¹, M. Schaper¹, V. Danchenko²

¹Institute of materials science, Leibniz University of Hanover
An der Universität 2, 30823 Garbsen, Germany  
²Department of metal forming, National metallurgical academy of Ukraine 
4 Gagarin Ave., Dnipropetrovsk, 49600, Ukraine

UDC 621.771.23:669.2

Metall. Min. Ind.,  2011, Vol. 3, No. 7, pp. 7-16

Abstract

By experimental investigations on twin-roll casting of high-strength age-hardened aluminum alloys EN AW-6082 and EN AW-7020 optimal process parameters, which provide a stable and continuous formation of medium thickness strips on the full roll width with a good surface quality, were determined. For the first time the influence of the twin-roll casting and subsequent additional processing on microstructure and mechanical properties of the materials was studied for these alloys. Additional processing included hot rolling and/or heat treatment. It is established that the subsequent treatment of casted bands allows to satisfy the requirements of European standards to the strength and plastic properties regarding high-strength aluminum alloys sheets.

Keywords: TWIN-ROLL CASTING, HIGH-STRENGTH AGE-HARDENED ALUMINUM ALLOYS, HOT ROLLING, HEAT TREATMENT, MECHANICAL PROPERTIES, MICROSTRUCTURE