脉冲电流对5052铝合金铸轧板材组织的影响  

Effect of pulse current in roll casting on the microstructure of 5052 aluminum alloy sheet

作　　者：吕野楠 许光明[1] 丁韧 谭贝[1] 曹富荣 

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110819 [2]辽宁省交通高等专科学校机电系,辽宁沈阳110122

出　　处：《轻合金加工技术》2018年第1期9-13,共5页Light Alloy Fabrication Technology

基　　金：国家研发计划资助(2017YEB0306403)

摘　　要：在传统铸轧过程中施加脉冲电流,生产5052铝合金板材,通过显微观察,研究了铸轧工艺对板材显微组织的影响。结果表明:与传统铸轧相比,施加脉冲电流的铸轧能细化5052铝合金板材组织,抑制枝晶生长。当脉冲电流参数:占空比20%、峰值电流200 A、电流频率50 Hz时,5052铝合金铸轧板组织的细化效果最好。The effect of the roll-casting process on the microstructure of 5052 aluminum al- loy sheets was investigated with the microscopic observation after they had been produced by the conventional twin-roll casting （TRC） process with the pulse current field. It is found that the dendrites formed under the pulse current field are refined, and the microstructure is equiaxed. Under 20% duty ratio, 200A peak current and 50Hz current frequency, the most superior properties earl be obtained in the alloy.

关 键 词：5052铝合金 铸轧 脉冲电流 组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG292[金属学及工艺—金属材料]