摘要
鋁合金因具有質輕、耐蝕、美觀、延性與熱傳性佳等諸多優良特性，因此被廣泛 的應用於重視表面品質的 3C & 帷幕牆與汽車輕量化等產品上。另方面又具有節能減 碳與材料循環利用的國際重視議題，使得鋁合金成為奪目亮眼的重要金屬之一。 鋁合金的陽極產品被廣泛用來製造重視外觀的 3C 產品殼件， 如 AA5052 鋁合 金。惟國內鋁製造業者在產製這種高階陽極產品時，軋延鋁片常有組織條紋或細線紋 的品質問題，追根究柢其原因在於上游的鑄胚細晶不良約 600μm 粗晶所致。國內業 者因此需外購較高價優質鑄胚來進行生產而影響其競爭力。為了協助國內產業技術自 主，不需仰賴國外進口鑄胚，本研究收集相關文獻釐清鑄胚細晶的問題所在，並引進 國外最先進的優質 Al-3Ti-B 細晶線，與產業既有使用的一般 Al-3Ti-B 細晶線及 Al-5Ti-0.2B 細晶線，藉由系統化的模擬實驗，發現優質 Al-3Ti-B 細晶線可在加線用 量減半下更優於目前一般 Al-3Ti-B 細晶線及 Al-5Ti-0.2B 細晶線之鑄胚細化能力，鑄 胚晶粒可達到 180μm 以下水準。若將加線位置由除氣機入口端改在出口端，鋁片透 過陽極與化拋處理，證實新製程在鋁片上的組織條紋與細線紋的檢驗，皆可由 C 級 不良等級提升至 A 級的優良等級，並達到國際水準。 本研究最終能獲得良好成果，主要歸功於有效的文獻收集、系統化的實驗設計、 敢於引進嘗試創新型細晶線與業界的密切配合所致。
並列摘要
Aluminum alloy with light weight, artistic surface, better ductility and thermal conductivity ete excellent properties, and then widely apply to 3C, only curtain wall and save-weight vehicle products which care surface quality. On the other hand, it is also match international concern issue about energy saving, carbon, reduction, and material economic cycle, and then become to shiny metal The anodized AA5052 aluminum alloy products are broadly used for 3C cover parts, however the domestic manufacturers to produce this high level products, often found some structure stripes or stringers defect on rolling sheet, to get to the heart of the matter, those defect due to about 600μm coarse grain.so they need to import excellent quality slab to overcome this problem. For the technical autonomy and without import slab, this study will collect documents to clarify what problem on slab grain refining and thinking introduce state-of-the-art advanced Al-3Ti-B grain refiner, to compare refining efficiency with both existing general Al-5Ti-0.2B and Al-3Ti-B grain refiners. Under simulation experiment of systematization, the advanced Al-3Ti-B grain refiner with predominant refining efficiency of only half adding rate of existing refiner, and easy to achieve small than 180μm grain size, if correct the adding position on exit port of degassing facility, the final rolling sheet can avoid both structural stripe and stringer defect after anodized and chemical polish inspection. This to prove the anodized products quality can be promoted the level from C to A under use the new melting and casting process, which adopted new type grain refiner and correct adding position Finally, the product has been achieved the international quality level. This study can get good result which credit systematization design of experiments, dare to innovation and cooperate with manufacturer.