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題 名 | 合金元素(銅,鈦)對縮墨鑄鐵破裂韌性之影響=Effects of Alloying Elements (Titanium, Copper) on the Fracture Toughness of Compated Graphite Cast Iron |
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作 者 | 許正勳; 李深智; 施議訓; | 書刊名 | 鑄工 |
卷 期 | 25:1=100 1999.03[民88.03] |
頁 次 | 頁19-25 |
分類號 | 472.2 |
關鍵詞 | 合金元素; 縮墨鑄鐵; 破裂韌性; Compacted graphite cast iron; Vermicularity; Alloying element; Ti/Cu; Fracture toughness; |
語 文 | 中文(Chinese) |
中文摘要 | 縮墨鑄鐵(Compacted/vermicular graphite cast iron)由於具有特殊之石墨型態, 使其性質(機械性質和物理性質等)相對於延性鑄鐵(SG)或灰口鑄鐵(FG)而言,具有截長補短 之功效。本研究採用較經濟又便利的不足量球化處理法,利用球化劑添加量來控制延性鑄鐵 鐵水,以研製縮墨鑄鐵,並探討合金元素銅及鈦之添加,對縮墨鑄鐵破裂韌性之影響。 實驗結果顯示,不論銅及鈦的添加與否,當球化劑添加量為0.9wt%時可獲得良好之縮墨 鑄鐵(縮墨率80%以上),其機械性質符合ASTM-A842規範300級以上。 然而當球化劑添加量0.9wt%,且添加銅或鈦時,其縮墨率達95%;添加銅及鈦元素的縮 墨鑄鐵試片,有促進波來鐵生成及細化石墨之功效,破裂韌性值都是優於未添加銅及鈦。 |
英文摘要 | Compacted graphite (CG) cast iron is an engineering material which contains graphite morphology in a short, stubby, wormlike shape with rounded edges. Since its structure is intermediate between that of gray and ductile iron, its mechanical and physical properties are also intermediate. In the present paper, CG iron was produced by the method of controlled amount of nodularizer with or without Ti/Cu addition in the casting processing of ductile iron. The effects of alloying elements (Ti, Cu) on fracture toughness of CG iron then were investgated. The results showed that when nodularizer applied to molten iron in the amount of 0.9wt% in theis experiment, CG iron of over 80% vermicularity (balance nodular grapihite) was produced with or without Ti/Cu alloying addition. The mechanical property of the CG iron thus obtained conformed to ASTM A842 Grade 300 standard. Also, it was found that the vermicularity increased (about 95%) when the alloying element (Ti or Cu) added. Titanium or copper alloying seemed to refine graphite morphology, and promote the formation of pearlite. This has an effect of upper fracture toughness of CG iron than without Ti/Cu alloying addition. |
本系統中英文摘要資訊取自各篇刊載內容。