高溫氧化層對純鈦無模抽製成形影響

Effects of High Temperature Oxide Layers on Titanium Alloys Dieless Drawing Forming

黃永茂(Yeong-Maw Hwang) ； 郭冠緯(Guan-Wei Kuo) ； 劉翰軒(Han-Hsuan Liu)

《鍛造》 27卷2期 (2018/07) Pp. 5-10

摘要

本研究針對線材直徑為1mm的Ti-6Al-4V線材，經過無模抽製成形後，產品微觀結構與氧化層對產品機械性質影響與探討。首先針對有氧化線材與無氧化線材進行拉伸試驗，並觀察出氧化層可能會改變材料的降伏強度、抗拉強度及延展性。後續透過有限元素軟體DEFORM內建感應加熱功能建立與實驗機台架構相仿的無模抽製模擬模型，並透過無模抽製成形實驗比較感應加熱模擬的溫度分佈，並驗證感應加熱模擬的可行性。驗證感應加熱模擬準確度後，本實驗以此架構模擬出線材於不同製程參數下線材成形輪廓。

並列摘要

In this study, the effects of oxidation and the corresponding influence of mechanical properties on Ti-6Al-4V wire after dieless drawing process are under investigated. The examinations of mechanical properties of dieless drawing product are conducted through tensile test. In the result of tensile test, we concluded that the exist of oxide layer on dieless drawing product will affect the yield stress, elongation and UTS on final product. Finally, an induction heating simulation modules which the validity has been proved was applied to the simulation of dieless drawing. After the simulation of induction heating, an FEM model was built for simulating the profile of drawing product.