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題 名 | 鐵水成份損失對機械性質和微結構影響之研究=Effect of Composition Loss on Mechanical Properties and Microstructures of Molten Irons |
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作 者 | 黃立仁; 黃立伍; 施登士; | 書刊名 | 鑄工 |
卷 期 | 25:3=102 1999.09[民88.09] |
頁 次 | 頁35-50 |
分類號 | 472.2 |
關鍵詞 | 濕模砂; 化學成份; Green sand mold; Chemical composition; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究利用具不同成份的濕模砂,造模成單獨流路系統和具模穴的完整系統後, 澆鑄熔融鐵水,並在流路出口上取冷激片,作化學成份分析,來探討熔融鐵水與濕模砂在流 路反應前後的鐵水化學成份變化,以及熔融鐵水在模穴內各階段氣氛的化學成份變化及其鑄 件表面品質。 實驗結果顯示,若鐵水澆注入濕砂模中,因鐵水與濕砂模的氧化反應和溫降會更促使氧 化物渣的大量產生,此渣會促進鐵水凝固時成核及成長的機率。鐵水中成份的損失隨砂模含 水量、經過流路時間、鐵水溫降愈大,則各種成份的變化愈大。鐵水經過流路後冷激片中介 在物顆粒數較多且小,在冷激片中可發現矽會成為成核顆粒之主要成份,所以矽含量愈多, 增加氧化矽成核機會,所以球墨鑄鐵的顆粒較灰鑄鐵多且均勻分佈。且因此其機械性質明顯 提升,因鐵水經流路與砂模氧化反應及溫降,其中氧化反應增加基地成核的機率。但砂模含 水份愈多過流路澆鑄鑄件之機械性質並不會提升太多,這是因鐵水中碳的還原作用所致。 |
英文摘要 | This study fully investigates the effect of filling time, pouring temperature, and chemical composition of molten iron in different sand molds of moisture on the consituent changes of silicon and carbon in the runners or the mold cavities. Variables concerned are temperatures of molten iron, ingredients of green sand and its mulling effect, different filling time in the runners. Green sand will be prepared in the range of betonite(6-10%), seacoal(2%)and recycled dust(6.2% max.) Microstructures and surface qualities also observed from the effect of changes of chemical composition during filling. Under the effect of above-mentioned variables, experimental data can show the ingredients changes of silicon and carbon before and after the runners during filling. All these data will be treated as reference base for comparing the mechanical properties and microstructures of casting and carbon equivalent loss from the pouring trials. |
本系統中英文摘要資訊取自各篇刊載內容。