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題 名 | 深冷處理對沃斯回火球墨鑄鐵機械性質及顯微組織影響之研究=Subzero Cooling Treatment for Austempering Ductile Iron |
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作 者 | 黃立仁; 鄭朝旭; 蔡英薇; 林志學; | 書刊名 | 中州學報 |
卷 期 | 20 2004.12[民93.12] |
頁 次 | 頁219-228 |
分類號 | 472.2 |
關鍵詞 | 深冷處理; 沃斯回火球墨鑄鐵; 機械性質; 顯微組織; Austempered ductile iron; Subzero cooling; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究為了對沃斯回火球墨鑄鐵深冷處理的機械性質和微結構的關係更深入的分析,所採用的材料為濕砂模澆鑄斷面25mm、的Y型球墨鑄鐵鑄件;探討的實驗參數有殘留沃斯田鐵量、肥粒鐵板條型態等對沃斯回火球墨鑄鐵深冷熱處理方式的影響,比較一般沃斯回火處理後與深冷處理 (冰水、乾冰、液態氮等) 之機械性質和微結構,並探討他們的差異性。實驗結果比較不同深冷處理溫度,可發現抗拉強度,降服強度,延伸率皆隨深冷處理溫度愈低則其強度愈高而延伸率愈低深冷主要是因深冷處理溫度愈低,因基地中的殘留沃斯田鐵的量變態為變靭鐵或麻田散鐵量愈多。硬度隨著深冷處理而增高,相對可以判斷或推理出其抗拉強度,彈性限亦有增高之趨勢,而延伸率則是稍降低的。因基地內的殘留沃斯田鐵變態為麻田散鐵使衝擊韌性隨深冷溫度愈低則其韌性有降低趨勢,若衝擊值低(吸收能量低),可證明沃斯回火球墨鑄鐵已經是由部分延性轉為脆性。 |
英文摘要 | The mechanical properties and microstructures of various subzero treatment austempered ductile iron (ADI) were investigated in this study. Y-block castings (25 mm) with inoculation for different austempering heat treatments of ductile irons (ADI and its subzero cooling), were prepared and test the mechanical properties of heat treated ADI. The developed mechanical properties were in relation with subzero temperature, distribution of residual austenite and the types of ausferrite in the martrix of ADI. The specimens were taken from Y-block castings for austempered ductile iron. Then they treated with subzero cooling procedure in different subzero temperatures (ice water, CO2, N2). Mechanical properties included UTS, YS, elongation, hardness and impact toughness. Therefore observed microstructures of SEM used to describe the difference of mechanical properties for ADI and its subzero cooling. To improve the mechanical properties and stability of microstructure were fully development in this study and application in the future of industry. |
本系統中英文摘要資訊取自各篇刊載內容。