铝合金半连续铸造过程中的液穴温度分布  

Melting zone temperature distribution during semi-continuous casting of an aluminum alloy

作　　者：潘冬[1] 许庆彦[1] 叶小刚[1] 柳百成[1] 

机构地区：[1]清华大学机械工程系,教育部先进成形重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2009年第2期206-209,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(10477010);国家“八六三”高技术项目(2007AA04Z141);国家“九七三”重点基础研究项目(2005CB724105)

摘　　要：针对生产一线对于铸锭质量控制和优化生产工艺的需求,在工厂实际生产平台上通过实验方法,测量了热顶立式半连续铸造圆铸锭液穴内部和凝固部分各个不同位置的温度,并通过插值方法得到了整体的温度分布,分析了糊状区的分布特点。结果表明热帽对保持铝液的温度起着明显的作用,结晶器一次冷却区的冷却速度不大,铸锭在凝固过程中散热主要通过二次冷却区冷却水的激冷作用实现。该文结果为工艺参数的优化提供了参考。Industrial demands are increasing the need for ingot quality control and process optimization for hot-top direct chill casting. This paper presents measurements of temperatures at different positions in the ingot during production. The entire temperature distribution in the ingot was then obtained by interpolation to study the mushy zoners properties. The results show that the hot top has an strong influence on the liquid aluminum temperature. The cooling rate of the ingot within the mold is quite low, with the chilling water removing most of the heat away the ingot. The results are useful for the process optimization.

关 键 词：铝合金 半连续铸造 温度场分布 实验研究 

分 类 号：TG249.7[金属学及工艺—铸造]