变形过程中铸轧铝合金中元素分布的演化行为  

Alloy elements distribution in twin roller cast aluminum billet affected by deformation

作　　者：朱远志 沈卫东 张帆 赵超奇 蒙毅 林宇龙 

机构地区：[1]北方工业大学机械与材料工程学院,北京100144 [2]国网冀北电力有限公司经济技术研究院,北京100041

出　　处：《中南大学学报（自然科学版）》2017年第6期1473-1480,共8页Journal of Central South University:Science and Technology

基　　金：北京市长城学者资助项目(CIT&TCD20140301);国家自然科学基金资助项目(51675007)~~

摘　　要：采用层状溶解法,利用等离子发射光谱研究不同轧制变形量对铸轧1235铝合金板材厚度方向上铁、硅元素分布的影响。研究结果表明:铸轧坯料中铁的偏析非常严重,硅在铸轧板中存在比较轻微的偏析。经较小的变形量(49.3%)变形后,铁、硅元素的偏析规律与铸轧坯料中基本相似,这些元素在板料中的流动符合层状流动规律;当变形量较大时(83.6%),合金元素在金属中的流动变得复杂。The effect of deformation on the distribution of Fe and Si in the twin roller cast billet was evaluated using a layer by layer dissolution method. ICP-AES was used to measure the chemical compositions in the dissolved solution. The results show that severe macro-segregation of Fe and slight macro-segregation of Si are of presence in the twin roller cast 1235 aluminum billet. A slight deformation（49.3%） cannot change the distribution of Fe and Si in the rolled twin roller cast strip. However, the distribution of Fe and Si in the twin roller cast strip is dramatically changed when the billet is deformed with a strain higher than 83.6%.

关 键 词：1235铝合金 铸轧 偏析 轧制 

分 类 号：TG290[金属学及工艺—铸造]