鎂合金薄板熱間擠製之塑流分析與製程開發

Plastic Flow Analyses and Process Development in Hot Extrusion of Magnesium Alloy Strips

黃永茂(Yeong-Maw Hwang) ； 涂仕明(Shih-Ming Tu) ； 林松秀(Sung-Hsiu Lin)

《鍛造》 19卷1期 (2010/03) Pp. 34-45

https://doi.org/10.29791/Forging.201003.0004

摘要

鎂合金薄板現已大量應用於3C產業，其中以筆記型電腦與隨身碟等之所需為甚。本文將針對厚度1mm之鎂合金薄板進行熱間擠製研究。首先進行熱間壓縮試驗獲得鎂合金在高溫下之塑流應力，代入有限元素解析軟體模擬，分析鎂錠在模穴內之流動型態及溫度分佈並探討模具之彈性變形，找出合適之擠製條件以獲得健全薄板。接著進行薄板熱間擠製實驗，由擠製荷重、產品尺寸等解析值與實驗值之比較，驗證解析模式之適用性，並完成鎂合金薄板擠製之製程技術開發。

關鍵字

鎂合金薄板 ； 有限元素解析 ； 熱間擠製

並列摘要

A large number of magnesium alloy strips have been applied in 3C industries, especially used in notebooks and flash drives. This study involves analyses and experiments of magnesium's hot extrusion of 1mm strips. At first, hot compression tests are conducted to obtain the magnesium's plastic flow stresses in high tempearatures, which are used in the finite element analysis. In the FE simulations of hot strip extrusion, the flow pattern of the magnesium billet within the die, the temperature history at the die exit and the elastic deformation of the die are analyzed. Sound products are achieved by appropriate extrusion conditions. Finally, hot extrusion experiments are conducted and the experimental values of the extrusion load and dimensions of the products are compared with the analytical values to verify the validity of the analytical models. The extrusion process technology for Magnesium strips is successfully developed.

並列關鍵字

Magnesium alloy strip ； Finite element analysis ； Hot extrusion