脉冲电磁场在金属熔体中的电磁效应及其应用

Electromagnetic effect of pulsed electromagnetic field in molten metals and its applications

人类社会的发展对金属材料的质量提出了更高的要求,洁净化和均质化成为金属制品质量的共同追求目标.物理科学与技术的发展为材料制备技术的进步提供了新的机遇.脉冲电流和脉冲磁场由于瞬时能量高且线路负荷小,近年来在金属制备中的应用受到普遍关注.首先介绍了脉冲电流和脉冲磁场在金属熔体中的电磁效应,然后重点介绍了电流、磁场、电磁力在金属熔体中的分布以及脉冲电磁场对熔体流动的影响,最后简要介绍了脉冲电磁场在金属洁净化和细晶化方面的研究与工业应用.

Owing to the development of human society,higher quality metal materials are demanded.Cleanliness and homogenisation are typical goals of high-quality metal products.New opportunities for advances in material preparation technology are afforded by the development of physical science and technology.Recently,electric current pulses and pulsed magnetic fields have attracted significant attention in metal preparation owing to the high instantaneous energy and low circuit load afforded.Herein,the basic theory of electromagnetic effects in molten metals is first introduced.Subsequently,research status regarding the distributions of magnetic field,current,electromagnetic force,and corresponding flow fields in molten metals under applied electric current pulses and pulsed magnetic fields are presented and reviewed.Finally,studies and industrial applications of pulsed electromagnetic fields in metal cleaning and homogenisation are introduced.