低频电磁场对水平半连续铸造7075铝合金的影响  

Effect of Low Frequency Electromagnetic Field on the Horizontal Direct Chill Casting 7075 Aluminum Alloy

作　　者：赵志浩[1] 崔建忠[1] 左玉波[1] 张海涛[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2005年第1期51-54,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目(G199906490501)

摘　　要：采用实验的方法研究了低频电磁场对水平半连续铸造铝合金的表面质量及铸态组织的影响·将使用传统水平半连续铸造生产出的铸锭与低频电磁水平半连续铸造生产的铸锭进行了比较·研究结果表明,低频电磁场可有效地减少铸锭的表面缺陷并显著改善铸锭的微观组织·此外,提高磁场的强度或适当降低磁场的频率均有利于对铸锭质量的改善·实验所采用的安匝数及频率范围中,最优的条件分别为10000,30Hz·The influence of low frequency electromagnetic field on ingot surface quality and as-cast microstructure in horizontal direct chill (HDC) casting process were investigated experimentally. The casting surfaces and as-cast microstructures of the ingots by conventional HDC and low frequency electromagnetic HDC casting were compared. The results showed that low frequency electromagnetic field can significantly reduce the surface defects and refine the as-cast microstructures. Further more, increasing electromagnetic intensity and decreasing frequency is both beneficial to the improvement of ingot quality. The optimal number of ampere-turns and frequency available to the experiments are found to be 10000 and 30Hz,respectively.

关 键 词：水平半连续铸造 低频电磁场 铝合金 表面质量 铸态组织 

分 类 号：TF777[冶金工程—钢铁冶金] TG113.12[金属学及工艺—物理冶金]