新開發之鍛造鎂合金

New Magnesium Wrought Alloys

馬寧元(Ning-Yuan Ma)

《鍛造》 10卷3期 (2001/09) Pp. 25-27

摘要

基於資源日漸短缺及環境要求愈嚴格，所有工程領域皆須利用輕質結構材料，鎂是最輕之結構性材料，密度為 1.8g/cm3。目前 12 萬噸之鎂組件中，95%都是利用壓鑄製程製造，而僅有 5%少量產品由鍛造鎂合金製成。鍛造鎂合金之優點包括：極佳之機械性能、可焊接特性、熱處理之可行性及研展性之增加。鍛造鎂合金之缺點包括：高成本、較少之變形比例及嚴格受限的合金範圍，因此最佳製程與新合金系統之開發有其必要。含鋅及鋰最佳化組成之鍛造鎂合金正在開發中，鋰可增加鍛造鎂合金之研展性，鋅可提供時效硬化，大幅增加降伏強度。

並列摘要

With increasing resources shortage and strict environmental regulations, consistent lightweight materials within all areas of engineering are essential to create new potentials. Magnesium is the lightest metallic construction materials with density of approximately 1.8g/cm3. Among the 120,000 tons of magnesium processed components worldwide so far, over 95% are manufactured by the pressure die casting process, small number of products use magnesium wrought alloys. Magnesium wrought alloys offer crucial advantages, such as superior mechanical properties, weldability, possibility of heat treatment and an increased ductility. The disadvantages of magnesium wrought alloys including high costs, small deformation. Ratio and severely limited alloy spectrum. Therefore the requirements for both optimized processing and new alloy system are essential. New magnesium wrought alloys with optimized zinc and lithium content are being developed. The alloying element of lithium can clearly increase the ductility, zinc offers the possibility of age hardening and increase the yield strength to a large extent.