New extrusion process of Mg alloy automobile wheels
(1. College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
2. Engineering Research Center of Magnesium-base Material Processing Technology, Ministry of Education,
North University of China, Taiyuan 030051, China)
2. Engineering Research Center of Magnesium-base Material Processing Technology, Ministry of Education,
North University of China, Taiyuan 030051, China)
Abstract: The recent research and development of forged magnesium road wheel were reviewed. Methods of flow-forming, spin forging of manufacturing a forged magnesium alloy wheel were introduced. A new extrusion method was investigated especially. Extrusion from hollow billet was proposed in order to enhance the strength of spoke portion and reduce the maximum forming load. By means of the developed technique, the one-piece Mg wheels were produced successfully by extrusion from AZ80+ alloy. At the same time, the existing problems on the research and development of forged magnesium road wheel were analyzed. The impact testing, radial fatigue testing and bending fatigue testing results show that AZ80+ wheel can meet application requirement in automobile industry.
Key words: magnesium alloy; road wheel; extrusion; flow-forming; spin forging