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从脉冲电流内在因素(如脉冲电流类型、脉冲电流参数选择等)和电流外在因素(如脉冲电流施加方式、通电时间控制等)两方面介绍了脉冲电流影响纯铝凝固组织的研究现状。从促进形核因素,如脉冲磁力作用、团簇结构理论、过冷度的影响、降低形核势垒;抑制晶粒生长因素,如焦耳热效应和Peltier热效应、枝晶断裂等多方面探讨了脉冲电流影响纯铝凝固组织的机理。并指出在机理方面尚未形成定论,将该项技术应用于工业生产存在一定的困难。但随着对其研究深入,必将成为未来先进的绿色凝固技术。
The research status of pulsed current influencing solidified structure of pure aluminum is introduced from the aspects of internal factors (such as pulse current type, pulse current parameter selection, etc.) and current external factors (such as impulse current application mode and energization time control). The effects of nucleation factors, such as pulsed magnetic force, cluster structure theory and supercooling degree, on the reduction of nucleation barriers, suppression of grain growth factors, such as Joule heating effect, Peltier thermal effect and dendritic fracture, Current affects the solidification mechanism of pure aluminum. And pointed out that in the mechanism has not yet formed a conclusion, the technology used in industrial production there are some difficulties. However, with its in-depth research, will become the future of advanced green solidification technology.