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題名 | 鈦-6.4鋁-3.6釩合金鍛造性分析=Analysis of the Forged Properties of Ti-6.4Al-3.6V Alloy |
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作者姓名(中文) | 林清淵; 趙志燁; | 書刊名 | 航空技術學院學報 |
卷期 | 10:1 2011.08[民100.08] |
頁次 | 頁61-68 |
分類號 | 472.7 |
關鍵詞 | 鈦合金; 顯微結構; 麻田散鐵; Titanium alloys; Microstructure; Martensit; |
語文 | 中文(Chinese) |
中文摘要 | 本文主要利用掃描式電子顯微鏡 (SEM) 和 X光繞射分析儀 (XRD) 分析技術,探討鈦-6.4鋁-3.6釩合金鍛造性,主要研究結果,如下所示:1. SEM觀察顯示:合金 α/β相變態溫度介於為 980~1000℃,麻田散鐵轉換溫度 (Ms) 介於為 830~850℃。2. 1030℃/15分鐘熱處理,合金顯微結構為麻田散鐵相,晶格常數 a=0.292nm, c=0.467nm。加工率愈大,硬度愈高,最大值 Hv =408.94。3. 880℃/15分鐘熱處理,合金顯微結構為 (α+β) 等軸雙相組織。此外, β相區冷卻後會轉變為麻田散鐵。鍛件的硬度隨加工率增加而變高,惟加工愈大,等軸晶組織愈大。 4. 780℃/15分鐘,合金顯微結構為 (α+β) 雙相組織,α相和 β相之晶格常數分別為 a=0.292nm,c=0.467nm和 a=0.322nm。加工率愈大,硬度愈高,最大值 Hv =357.2,且鍛件組織中 β相晶粒呈不規則條狀。 |
英文摘要 | The purposes of the present studies are to investigate the forge-ability of the 6.4Al-3.6V Ti-alloy by using of the scanning electron micrograph (SEM), and X-ray diffraction (XRD) methods. Some results are described as following: 1. The α /β transition temperature of the present alloy will be in the range of 980-1000℃, and the martensite transition (Ms) being of 830-850℃. 2.Being heated on 1030℃/15min., the microstructure of the alloy is a martensite phase with the lattice parameters a=0.292nm, c=0.467nm. With the increasing the forging ratio, the hardness of the specimen would be increased as high as Hv=408.9. 3. Being heated on 880℃/15min., the microstructure of the alloy is a mixture (α+β) duplex phase. In addition, the equi-axed β-phase region would be transformed to a martensite during the quenching. With the increasing the forging ratio, the hardness of the specimen would be increased, and the equi-axed grain size would also be larger. Being heated on 780℃/15min., the microstructure of the alloy is a mixture (α +β ) duplex phase. The lattice parameters of α and β phases are a=0.292nm, c=0.467nm and a=0.322nm, respectively. With the increasing the forging ratio, the hardness of the specimen would be increased as high as Hv=357.2, and the β-phase grain would also be elongated. |
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