工艺参数对镁合金铸轧板坯凝固前沿影响规律的研究  

Effects of Processing Parameters on Solidification Front Structure in Twin-roll Casting Magnesium Alloy

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 [2]苏州有色金属研究院有限公司材料工艺研究所

出　　处：《特种铸造及有色合金》2011年第2期116-119,200-201,共4页Special Casting & Nonferrous Alloys

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资助项目(2008YK02)

摘　　要：通过镁合金铸轧工艺试验,分析了辊面线速度、轧辊直径、铸轧区长度以及铸轧板坯厚度对铸轧区凝固前沿位置及板坯宏观质量的影响。试验结果表明,在铸轧区长度、板坯厚度一定的条件下,铸轧速度显著影响凝固前沿位置,并进一步决定镁合金铸轧板坯表面质量及宏观缺陷形成特征。在其他工况条件不变的情况下,铸轧速度必须根据铸轧区长度、板坯厚度进行调整,并将铸轧区凝固前沿控制在优化区域,可稳定工艺、提高板坯的表面质量。Effects of processing parameters,such as rolling speed,roller diameter,setback length and strip thickness,on position of solidification front and surface quality of the magnesium alloy strip were analyzed experimentally.The results indicate that at a fixed setback length and strip thickness,solidification front position is closely related to the rolling velocity,which further controls surface quality and macro-defect characteristics of the magnesium alloy strip.At the other given processing conditions,rolling velocity should be coordinated according with setback length and strip thickness to ensure the solidification front position in the optimized zone during twin-roll casting magnesium alloy process,which could stabilize process and improve the surface quality of the magnesium alloy strip.

关 键 词：镁合金 双辊铸轧 凝固前沿 工艺参数 

分 类 号：TG292[金属学及工艺—铸造] TG339