脉冲电流影响合金熔体特征及其凝固组织的研究进展

Study Progresses on the Effects of Pulsed Current on Alloy Melts and the Solidification Microstructures of Alloys

摘要:

综述了国内外在脉冲电流液态金属处理方面的应用，对比总结了脉冲电流作用对不同合金的熔体处理及其凝固过程的影响，评述了脉冲电流的作用机理。针对当前研究中的问题及发展趋势，指出脉冲电流作为一种重要的外场辅助手段，在航空航天等轻型耐热材料的凝固制备和铸造上具有广阔的应用前景。

Abstract:

So far there are a lot of works domestic and abroad about how the pulsed current affects the melts and solidification of alloys, although the results appear uncertain and not systematic due to their different experimental ways, process parameters and conditions. Hereby this paper reviews the world-wide application of the pulsed current on liquid metals, summarizes the effects of pulsed current on the alloys melts and the course of solidification, and analyses their mechanisms. According to our own experimental results, we dig out the existing problems, and point out that the pulsed current is an important external field controlling method with a great potential for manufacturing and casting light-weight and temperature resistant materials used in air and aerospace field.