Investigation on the formability of magnesium alloy bar under hot forging process

• Main Authors: Zun-Yao Huang, 黃圳遙
• Other Authors: Su - Hai Hsiang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/4t9skr

碩士 === 國立臺灣科技大學 === 機械工程系 === 95 === This study investigated the mechanical properties and forming characteristics of AZ61 magnesium alloys bar under hot working. Firstly we utilized high speed metal test machine of China Steel Co. Ltd. to carry out the compression tests under different forming temperatures and strain rates to obtain the stress-strain curves. Then, bearing cover of gear box in car components was selected as a carrier in hot forging to probe into the formability of magnesium alloys. And, the stress-strain data obtained from compression test under different forming temperatures and strain rates are applied to analyze the formability of the bearing cover by commercial package DEFORM. Finally, by comparing the analytical results of DEFORM simulation and the experimental results. we tried to figure out the method that can manufacture bearing cover perfectly with low forging load. we also evaluated how temperature influenced hardness and microstructure of the bearing cover .