| 凝固速度对铸铁石墨形态的影响 |
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| 引用本文： | 厉松春,丁少兰,吴学明,徐昭华,姚忻,于敞,李越刚,王务献.凝固速度对铸铁石墨形态的影响[J].材料科学与工艺,1987(2). |
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| 作者姓名： | 厉松春 丁少兰 吴学明 徐昭华 姚忻 于敞 李越刚 王务献 |
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| 作者单位： | 上海交通大学，上海交通大学，上海交通大学，上海交通大学，上海交通大学，上海交通大学，上海交通大学，上海交通大学 |
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| 摘 要： | 本文采用定向凝固技术研究了凝固速度对铸铁石墨形态,奥氏体和石墨结晶动力学的影响,并分析研究了奥氏体,石墨棱面和基面之间的生长速度相对大小与石墨形貌之间的关系。发现奥氏体的生长速度随凝固速度的增加而增大,当奥氏体的生长速度超过石墨棱面的生长速度时,片状石墨突变为蠕虫状石墨,反之,则导致蠕虫状石墨突变为片状石墨。
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| 关 键 词： | 凝固速度 铸铁 石墨形态 结晶动力学 |
Influences of Solidification Rate on Graphite Morphology in Cast Iron |
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| Li Songchun Ding Shaolan Wu Xueming Xu Zhaohua Yao Xin Yu Chang Li Yuegang Wang Wuxian.Influences of Solidification Rate on Graphite Morphology in Cast Iron[J].Materials Science and Technology,1987(2). |
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| Authors: | Li Songchun Ding Shaolan Wu Xueming Xu Zhaohua Yao Xin Yu Chang Li Yuegang Wang Wuxian |
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| Affiliation: | Shanghai Jiaotong University |
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| Abstract: | By using the technique of liquid metal cooling directional solidification, the influences of solidification rate on the the morphology of graphite and on the crystal kinetics of austenite and graphite were investigated. The relations between the graphite morphology and the relative growth rate of austenite, graphite prism and graphite basal plane were analyzed.The following facts were found in our investigation. With increase of the solidification rate the austenite growth rate increases. When the growth rate of austenite surpsses that of the graphite prism and plane, flake graphite will transitionally change into vermicular graphite, otherwise vermicular graphite will change into flake graphite. |
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| Keywords: | Solidification rate Cast iron graphite morphology crystal kinetics |
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