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題 名 | Carbon in Bainitic Ferrite of Austempered Ductile Irons=沃斯回火延性鑄鐵中變韌肥粒鐵之碳含量分析 |
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作 者 | 張柳春; 林進誠; | 書刊名 | 材料科學與工程 |
卷 期 | 37:1 民94.03 |
頁 次 | 頁30-35 |
分類號 | 472.2 |
關鍵詞 | 沃斯回火延性鑄鐵; 韌肥粒鐵; 碳含量; Austempered ductile iron; Bainitic; Ferrite; Austenite; Carbon concentration; |
語 文 | 英文(English) |
英文摘要 | An analysis of published data was conducted to examine the amount of carbon trapped, in solid solution or as carbide, in bainitic ferrite of austempered ductile iron. The average values for upper and lower bainite were calculated to be 0.067 and 0.378 wt.%, respectively. Given the large scatter in the data for upper bainite, the usually assumed equilibrium value of 0.03 wt.% is acceptable. However, some upper bainite formed at low temperature can retain as high as 0.36 wt.% of carbon in solution. The fact that both upper and lower bainite can hold up similar amount of carbon is consistent with the postulation that ferrite in both types of bainite grows in an identical mechanism, and then carbon will either precipitate as carbide or partition into the surrounding austenite. |
本系統中英文摘要資訊取自各篇刊載內容。