镁合金铸轧凝固层焊合点控制及工艺优化  

Kiss-point of solidification layer position control and process optimization for magnesium alloys twin-roll casting

作　　者：翁文凭[1,2] 邓康[1] 任忠鸣[1] 陈琦[2] 迟之东[2] 赵奇特[2] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]苏州有色金属研究院有限公司材料工艺研究所,苏州215026

出　　处：《中国有色金属学报》2011年第6期1229-1234,共6页The Chinese Journal of Nonferrous Metals

基　　金：江苏省自然科学基金资助项目(BK2010249);中色科技股份有限公司科技发展计划基金(2008YK02)

摘　　要：结合镁合金铸轧工艺特点,分析镁合金板坯铸轧过程中凝固层焊合点位置与板坯缺陷的影响规律;针对板坯厚度、铸轧区长度及铸轧速度等关键参数,简化凝壳径向生长及凝固前沿周向转动过程,确定铸轧速度匹配范围,建立凝固层焊合点位置控制模型,并通过工艺试验对控制模型进行验证。结果表明:通过理论模型确定工艺匹配范围,可稳定并优化镁合金铸轧工艺,大幅度降低铸轧板坯宏观缺陷,获得表面光洁、质量良好的镁合金铸轧板坯。The effect of kiss-point position of solidification layer of twin-roll casting on macro-defects of magnesium alloys strip was analyzed through experiments and theoretical derivation.A kiss-point model which considers the strip thickness,set-back length and roll speed was established to optimize the process and enhance the surface quality of magnesium alloys strip.The results show that the model of kiss-point of solidification layer effectively stabilizes and optimizes the twin-roll casting processing,and the defect-free magnesium alloys strip is obtained by twin-roll casting.

关 键 词：镁合金 双辊铸轧 凝固层焊合点 控制模型 工艺优化 

分 类 号：TG146.2[一般工业技术—材料科学与工程]