中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 12 No. 5 October 2002 |
AZ80 magnesium alloy
prepared by hot extrusion from
recycled machined chips
ZHANG Da-tong(張大童), Ngai Tung-wai Leo(倪東惠),
CHEN Wei-ping(陳維平)
（College of Mechanical Engineering, South China University of Technology,
Guangzhou 510640, China）
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.
Key words: hot extrusion; magnesium alloy; chip; recycle
