【作者】 黄诚； 毛璟红； 宋波； 王福明； 赵沛；

【Author】 Huang Cheng Mao Jinghong Song Bo Wang Fuming (University of Science and Technology Beijing)Zhao Pei (Central Iron and Steel Research Institute)

【机构】 北京科技大学； 钢铁研究总院；

【摘要】 分析了金属凝固过程中非均质形核面积的变化规律,探讨了过冷度与凝固时间的关系,推导了晶粒度随着洁净度变化的数学模型。证明随着熔体洁净度增大,单位体积中的晶粒数将先增加,然后减少。利用电解纯铁进行凝固实验,得到的实验结果与模型一致。更多还原

【Abstract】 The heterogeneous nucleation area changing during the solidification of liquid metal was analyzed, the relationship between undercooling and solidification time was discussed, and a mathematical model on relationship between grain number and cleanness was developed. The results showed that with the increase of cleanness of the melt, the number of grain per unit volume increased at first, and then decreased. The solidification experiment was carried out with electrolyte iron, and the experiment result was agreement with that of the model .更多还原