Microstructure and properties of AZ80 magnesium alloy prepared by hot extrusion from recycled machined chips

来源期刊：中国有色金属学报(英文版)2002年第5期

论文作者：刘英 李元元 张大童 倪东惠 陈维平

文章页码：882 - 885

Key words：hot extrusion; magnesium alloy; chip; recycle

Abstract: AZ80 magnesium alloy was prepared by hot extrusion of recycled machined chips and its microstructure and mechanical properties were investigated. Hot pressing was employed to prepare extrusion billets of AZ80 chips, then the billets were hot extruded at 623K with an extrusion ratio of 25∶1. The extruded rods show a high ultimate tensile strength of 285MPa and a high elongation of 6%. Due to grain refinement by extrusion, mechanical properties of the extruded rods are much higher than those of as-cast AZ80 alloy. Process technique and chips densification mechanism were also studied. Results show that hot extrusion is an efficient method for AZ80 alloy chips recycling.