CREM法抑制7075铝合金半连铸坯中溶质元素宏观偏析的机制  

Mechanism of CREM Process on Restraining Macro-Segregation of Solute Elements in 7075 Aluminum Alloy Ingot by DC Cast

作　　者：张勤 崔建忠[1] 

机构地区：[1]东北大学材料电磁过程教育部重点实验室,辽宁沈阳110006

出　　处：《稀有金属材料与工程》2005年第4期627-631,共5页Rare Metal Materials and Engineering

基　　金：国家重大基础发展规划项目("973")(G199906490501)

摘　　要：实验研究了CREM法半连铸7075铝合金过程中,低频交变电磁场对凝固前沿形态、微观组织结构、非平衡凝固液固相线位置、结晶区间间隔以及温度场和流动场的影响规律。并据此对CREM法抑制7075铝合金半连铸坯中溶质元素宏观偏析的机理进行了分析和说明。In the producing process of 7075 aluminum alloy by CREM method, the effects of electromagnetic field with low frequency on the evolution of solidifying front shape, non-dendritic structure, liquidus and solidus temperature of non-equilibrium freezing, solidification interval, flow pattern and temperature field have been experimentally investigated. An explanation is also given to the mechanism of CREM process on restraining macro-segregation of solute elements in 7075 aluminum alloy ingot by DC cast.

关 键 词：低频电磁铸造 电磁场 铝合金 半连铸 宏观偏析 

分 类 号：TG249.7[金属学及工艺—铸造] TG111.4