8079铝合金双零箔铸轧坯料内部组织分析  

Analysis on internal structure of roll-casting stock of 8079 aluminum alloy light-gauge foil

作　　者：刘建兴[1] 张开宝[1] 李彦勤 王强[1] 袁志华 王小刚[1] LIU Jianxing;ZHANG Kaibao;LI Yanqin;WANG Qiang;YUAN Zhihua;WANG Xiaogang(JISCO Gansu Dongxing Jiayu New Materials Co.,Ltd.,Jiayuguan 735100,China)

机构地区：[1]酒钢集团甘肃东兴嘉宇新材料有限公司,甘肃嘉峪关735100

出　　处：《轻合金加工技术》2024年第7期29-32,共4页Light Alloy Fabrication Technology

摘　　要：借助OM和EPMA分析了双辊连续铸轧生产的8079铝合金双零箔坯料物相、晶粒形貌以及不同铸轧速度下铸轧带坯的中心偏析,确定了最佳的铸轧速度控制范围。结果表明,在带坯表层和中心层之间,8079铝合金双零箔铸轧带坯物相和金相组织有显著的差异,铸轧坯料中含有Al、Fe二元弥散相和Al、Fe、Si三元弥散相,当铸轧速度达到827 mm/min以上时内部组织明显恶化,带坯厚度中心附近出现了中心偏析。综合考虑产品质量和生产效率,8079铝合金双零箔铸轧坯料最佳铸轧速度为810~820 mm/min。The phases,grain morphology of the roll-casting stock of 8079 aluminum alloy light-gauge foil produced by twin-roll continuous casting,and the center segregation of cast-rolling stock at different casting speeds were analyzed by OM and EPMA.The optimal range of cast-rolling speed control was determined.The results show that there are significant differences in the phases and metallographic structure between the surface layer and the cen-ter layer of the roll-casting stock.Al-Fe binary and Al-Fe-Si ternary dispersoids exist in the roll-casting stock.When the cast-rolling speed reaches more than 827 mm/min,the internal structure is obviously deteriorated,and the center segregation appears near the center of the strip thickness.Taking into account the product quality and production efficiency,the optimal cast-rolling speed of the roll-casting stock of 8079 aluminum alloy light-gauge foil is 810-820 mm/min.

关 键 词：8079双零箔坯料 物相分析 中心偏析 铸轧速度 

分 类 号：TG335.13[金属学及工艺—金属压力加工] TG339