Study of Solid State Recycle Mg Alloy

• Main Authors: Ying-nan Lin, 林英男
• Other Authors: Shyong Lee
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/xfp223

博士 === 國立中央大學 === 機械工程研究所 === 97 === Abstract Magnesium alloy is a kind of lightest structure metal. As it has strong tensile stress and toughness, good conductivity and vibration absorber, electromagnetic cover and easy material recycling, magnesium alloy could be the best choice for 3C products for Aircraft chamber and automobile non-structure requirement material. It becomes wildly used in 3C manufacturing, automobile industry and bicycle etc. light structural industries. Large dumping and product recycle problem becomes outstanding. The research work is to introduce how the solid-state magnesium alloy could be recycled. Various heat treatment approaches and different heat treatment conditions are selected to investigate into the alloy mechanical property and its microstructure performance. It is expected to find out the best result data to strengthen the magnesium alloy AZ91D solid-state recycle process. The result of research as following: (1) The actual waste magnesium alloy can be recycled by the solid-state recycle process and the tensile stress of this recycled material is 316.7MPa. (2) The peak aging is aged at 170℃ temperature and 16hrs, the ultimate tensile stress of specimen which oxidized at 300℃ is 382.3MPa. (3) The best parameter of TMT (Thermo Mechanical Treatment) process of solid-state recycle process is 350oC pre-crunched process plus 400oC pro-tempering heat treatment. The tensile stress could reach 335.6MPa, yield stress 233.5.2MPa and extension rate 8.1%.