Directional Solidification Assisted by Liquid Metal Cooling
Directional Solidification Assisted by Liquid Metal Cooling
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DOI：
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发表时间：
2007
影响因子：
10.9
通讯作者：
J. Zhang;L. Lou
中科院分区：
文献类型：
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作者：
J. Zhang;L. Lou
综述了液态金属冷却辅助定向凝固技术的发展和现状。通过考虑以下需求，分析了LMC工艺快速发展的驱动力：（1）可以提供更高的热梯度以减轻先进合金系统中的偏析的新技术，以及（2）大型定向凝固高温合金部件的更好的生产成品率。回顾了LMC工艺工业化的发展历程，讨论了LMC工艺参数的选择，包括冷却介质的选择、动态挡板的使用、拉速的影响等，并介绍了传统LMC工艺高温合金和为LMC工艺开发的新型合金的组织和性能。最后，对LMC工艺的未来发展方向进行了总结。
An overview of the development and current status of the directional solidification process assisted by liquid metal cooling (LMC) has been presented in this paper. The driving force of the rapid development of the LMC process has been analyzed by considering the demands of (1) newer technologies that can provide higher thermal gradients for alleviated segregation in advanced alloy systems, and (2) better production yield of the large directionally solidified superalloy components. The brief history of the industrialization of the LMC process has been reviewed, followed by the discussion on the LMC parameters including selection of the cooling media, using of the dynamic baffle, and the influence of withdrawal rates and so on. The microstructure and mechanical properties of the traditional superalloys processed by LMC, as well as the new alloys particularly developed for LMC process were then described. Finally, futures aspects concerning the LMC process have been summarized.