A380鋁合金之成分微調改良

Effects of Minor Adjustment in Compositions of A380 Al Alloy

蔣易霖(Y. L. Chiang) ； 陳正剛(C. K. Chen) ； 楊智富(C. F. Yang) ； 陳俊沐(C. M. Chen) ； 邱垂泓(C. H. Chiu) ； 曾發培(F. P. Tseng) ； 楊家棋(C. C. Yang)

《鑄造工程學刊》 41卷4期 (2015/12) Pp. 33-42

摘要

本研究探討以合金成分微調來提升A380鋁合金之機械性質。實驗主要利用合金設計原理，於合金內添加微量Sr與Mn來改良脆性共晶矽及富鐵相之形貌，並降低合金之Cu與Fe含量來減少鑄件內脆性Al_2Cu(Mg)及富鐵相以改善A380鋁合金之脆性；並透過合金之顯微組織、拉伸性質以及破斷面分析來檢驗其成效。實驗結果顯示，經複合成分微調之A380MS1鋁合金能有效改善A380鋁合金之延性，在數種改良型合金中具有最佳之抗拉強度、延伸率及品質指數。其抗拉強度為181 MPa、延伸率為6.0%。相比於原材料A380鋁合金之抗拉強度(132 MPa)及延伸率(2.8%)則分別增加49 MPa及3.2%。

關鍵字

A380鋁合金 ； 成分微調 ； 延性 ； 共晶矽 ； 富鐵相

並列摘要

An investigation on improving the mechanical properties of A380 Al alloy was carried out by means of minor adjustment in alloy compositions and thermal treatment of the alloy. This study utilized theory of alloy design to improve the ductility of A380 Al alloy. This was conducted by adding small amount of Sr and Mn for modification of the morphology of eutectic Si and Al5FeSi phases, respectively. The results were examined by optical and scanning electron microscopies, tensile test and fractography. The results showed that, among the various A380-type alloys studied, the A380MS1 alloy with composite-adjustment in alloying elements was proven effective in improving the ductility of A380 alloy and exhibits the best combination of tensile strength, ductility and quality index. The tensile strength 181 MPa and ductility 6.0% of A380MS1 alloys were found to be increased from as cast A380 alloys condition of 131 MPa and 2.8%, respectively.

並列關鍵字

A380 Al alloy ； adjustment in compositions ； ductility ； eutectic Si ； Al_5FeSi