摘要
熔体温度是影响铝箔坯料质量的关键因素之一。采用铸轧法制备了7.0 mm厚的1235超薄双零铝箔坯料,借助光学显微镜（OM）、扫描电子显微镜（SEM）、定量金相分析技术和电解抛光等测试方法,研究了熔体温度处理对铸轧1235超薄双零铝箔用坯料组织的影响,并对其影响机理进行了分析和探讨。结果表明：熔体温度偏高,容易消除异质形核核心,造成铝箔坯料晶粒组织粗大。采用向电解铝液中加入10%~30%的重熔用铝锭,可以降低熔体温度,增加异质结晶核心,有利于增大熔体凝固过冷度,减小临界晶核半径,促进坯料晶粒细化。加入30%的重熔用铝锭,铸轧板组织晶粒更均匀细小,其晶粒平均尺寸约为67μm。
Melt temperature is one of the key factors that affect the quality of aluminum foil sheet. The aluminum foil sheet with thickness of 7.0 mm was manufactured by cast-rolling method. The effect of melt temperature treatment on the microstmcture of 1235 ultra-thin double zero aluminum foil sheet were investigated by using optical microscopy （OM）, scanning electron microscopy （SEM）, quantitative metallographic analysis technique and electrolytic polishing, etc and the impact mechanism was analyzed and discussed. The results show that when the temperature of aluminum melts is high, the amount of heterogeneous nuclei in the melt reduces, which leads to grain coarsening. By adding 10%-30% remelting aluminum ingots to the electrolytic aluminum liquid, it can reduce the melt temperature, increase the amount of heterogeneous nuclei in the melt, which is beneficial to increase the over cooling degree of melt solidification, decrease the radius of critical nucleus, and promote the grain refinement. By adding 30% remelting aluminum ingots, the microstructure of cast-rolling plate is more uniform and finer, and the average size of the grain is about 67 μm.
作者
李蒙
司国斌
祝庆
LI Meng SI Guobin ZHU Qing(College of Mechanical and Electrical Engineering, Jiaozuo University, Jiaozuo 454003, China Shangqiu Sunshine Aluminum Co., Ltd., Shangqiu 476000, China)
出处
《热加工工艺》
CSCD
北大核心
2016年第19期58-61,共4页
Hot Working Technology
基金
河南省高等学校重点科研项目计划(15B430004)
焦作市科技攻关项目(2014110019)
关键词
熔体温度处理
铝箔坯料
凝固组织
重熔铝锭
铸轧
melt temperature treatment
aluminum foil sheet
solidification microstmcture
remelting aluminum ingot
cast-rolling
