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題 名 | 晶胞界強化及熱循環效應對鑄態球墨鑄鐵之中溫拉伸性質影響=The Influence of Reinforcing Grain Cell Boundary and Cyclic Heating Effect on the Intermediate Temperature Tensile Properties of the As-Cast Spheroidal Graphite Cast Iron |
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作 者 | 林家吉; 林宏茂; 呂傳盛; 陳立輝; | 書刊名 | 鑄造工程學刊 |
卷 期 | 34:2=137 2008.06[民97.06] |
頁 次 | 頁40-46 |
分類號 | 472.2 |
關鍵詞 | 鑄態球墨鑄鐵; 中溫拉伸性質; 熱循環; As-cast spheroidal graphite cast iron; Intermediate temperature tensile property; Cyclic heating; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究主要探討關於銅、鉻及錳等波來鐵促進元素添加對鑄態球墨鑄鐵中溫(400℃)拉伸性質之影響,以及其熱循環後之400℃拉伸性質的最高加熱溫度效應。未經熱循環試片之400℃拉伸結果顯示,添加波來鐵促進元素(Cu、Mn、Cr)之球墨鑄鐵,與無添加波來鐵促進元素之球墨鑄鐵相互比較,添加合金之試片拉伸強度增加,延性下降。此外,由其室溫及400℃的拉伸試片破斷面觀察發現,室溫試片為劈裂破壞,而400℃試片卻呈現靨渦狀延性破壞且有縮孔存在。另一方面,由試片經10次熱循環後於400oC拉伸特性之最高加熱溫度(650、700、750與800oC)效應探討之結果,共通顯示於各個加熱溫度之試片的延性並無明顯變化,但是750℃時其強度卻呈現最低值。值得注意的是800℃的延性並無下降的現象。 |
英文摘要 | This study is intended to examine the effect of Cu, Cr and Mn elements which facilitate the formation of pearlite within as-cast spheroidal graphite cast iron on the tensile properties at intermediate temperature of 400℃ as well as the effect of maximum heating temperatures (650,700, 750 and 800℃) after cyclic heating. Tensile test results demonstrate that specimens which contain Cu, Cr and Mn elements and have not undergone cyclic-heating exhibit a stronger tensile strength but lowered ductility compared with specimen which contain no Cu, Cr and Mn elements. Furthermore, the ductile dimple fracture morphology and shrinkage have been observed at 400℃ in contrast to a brittle cleavage fracture surface at room temperature. On the other hand, the maximum heating temperatures have no significant effect on the ductility of the specimens stretched at 400℃ after cyclic heating for 10 cycles at different heating temperatures. The lowest tensile strength has been observed at 750℃ and no further decline in the ductility has been seen even at a temperature as high as 800℃. |
本系統中英文摘要資訊取自各篇刊載內容。