钛铝合金电磁冷坩埚定向凝固技术的研究

Directional Solidification Technology Based on Electromagnetic Cold Crucible to Prepare TiAl Intermetallics

介绍了针对高活性Ti及TiAl合金电磁冷坩埚定向凝固技术的研究结果。通过系统地对近矩形冷坩埚电磁场、温度场及其耦合作用的实验及分析,初步建立了温度、电磁压力与半悬浮熔体间以及它们与电磁冷坩埚系统主要参数之间的规律性关系。在此基础上制备出冶金质量较好具有定向凝固组织的Ti合金及TiAl金属间化合物的近矩形截面样件。

This paper presents an investigation on the directional solidification technique of Ti and TiA1 alloys with electro-magnetic cold crucible. By systematic experiments and analysis on the behavior of the temperature and electro-magnetic field within cold crucible and their coupling effect, a semi-quantitative relationship between temperature, electro-magnetic pressure and the appropriate semi-suspended melt was set up, The responses of these factors （T.P.Q.） to the main governing parameters of electro-magnetic cold crucible unit were also founded, Based on this study some Ti and TiA1 near-rectangular samples with directionally solidified microstructure by cold crucible are obtained.