CREM法半连铸Al合金过程中电磁场对溶质元素固溶的影响机理  

The forced solution mechanism of alloying agents of 7075 alloy as-cast ingot under the effects of electromagnetic field

作　　者：张勤[1] 班春燕[1] 崔建忠[1] 巴启先[1] 路贵民[1] 张北江[1] 

机构地区：[1]材料电磁过程教育部重点实验室,东北大学,沈阳110006

出　　处：《物理学报》2003年第10期2642-2648,共7页Acta Physica Sinica

基　　金：国家重大基础发展规划项目 ("973") (批准号 :G19990 6 490 50 1)资助的课题~~

摘　　要：实验研究了低频交变电磁场作用下 ,70 75合金半连铸坯微观组织形貌及各溶质元素的固溶情况 ;并就电磁场对液固相线位置和结晶间隔的改变进行了测定 ;此外还数值模拟了电磁场对半连铸过程中液穴内部温度场和流动场的影响 .从电磁场对 70 75合金凝固过程中的溶质分配系数 ,结晶间隔 ,液穴内部温度场、流动场以及微观组织形貌的影响出发 ,尝试性地对电磁场的强制固溶机理进行探讨性的解释和说明 .The influence of electromagnetic field with a low frequency on the microstructure and solute solubility of 7075 alloy produced by CREM process have been investigated. Evolution of the liquidus and solidus as well as the solidification interval are also measured. Meanwhile I the flow pattern and temperature field before and after the application of electromagnetic field is also given by numerical simulation. The forced solution mechanism of alloying agents of 7075 alloy under the effects of electromagnetic field is explained from such factors as solute equilibrium coefficient of distribution, solidification interval, flow pattern and temperature field in sump and microstructure.

关 键 词：CREM法 半连铸 AL合金 铝合金 电磁场 溶质元素 固溶 微观组织 

分 类 号：TG292[金属学及工艺—铸造] TG249.7