Development of manufacturing process of wrought magnesium alloy sheets by twin roll casting

Abstract

AbstrAct Purpose: The purpose of the work is to development of a strip casting technology for manufacturing magnesium alloy sheets. The aim of the work is to establish a manufacturing process and technology to facilitate the economical manufacture of high-strength magnesium sheet alloys. Design/methodology/approach: A horizontal type twin roll caster was used to manufacture magnesium alloy sheets. Pair of copper alloy roll, pure copper roll and steel roll was used for the horizontal type twin roll caster. The diameter of the rolls was 300mm and the width of rolls was 100 and 150mm. Findings: The magnesium alloy sheets could be succcessfully manufactured by the horizontal twin roll caster. The product sheet thickness in the present experiment was 2.0 to 5.0mm. The equiaxed microstrucure was observed in cast magnesium alloys when a pair of copper and cupper aolly rolls were used. The mean grain size of the cast magnesium alloys strip was from 30 to 60 micrometers. After hot rolling process, the grain size was reduced to about 10 micrometers. The obtained magnesium alloy sheet indicated a good plastic formability by a warm-drawing test.