2A12铝合金圆铸锭疏松产生原因及防止措施  

Cause and control measures of 2A12 aluminum alloy billet porosity

作　　者：史贵山 彭时勇 张悦 袁圣 SHI Guishan;PENG Shiyong;ZHANG Yue;YUAN Sheng(Southwest Aluminum(Group)Co.,Ltd.,Chongqing 401326,China)

机构地区：[1]西南铝业(集团)有限责任公司,重庆401326

出　　处：《轻合金加工技术》2023年第12期1-5,共5页Light Alloy Fabrication Technology

摘　　要：2A12铝合金以优良的性能广泛应用于航空航天等工业领域。大规格圆铸锭易出现疏松缺陷,影响最终产品的综合性能。对2A12铝合金圆铸锭生产工艺和铸锭组织分析表明,疏松为补缩型疏松。系统分析了2A12铝合金半连续铸造过程中熔体的氢含量、化学成分、铸造工艺参数以及环境湿度对疏松的影响。提出了减少2A12铝合金铸锭疏松缺陷的措施。2A12 aluminum alloy is widely used in aerospace and other industrial fields due to its excellent performance,but its large-sized billets are prone to porosity defects,which affects the overall performance of the final product.The production process and microstructure of 2A12 aluminum alloy billets were analyzed and the results show that the porosity are shrinkage type.The effects of hydrogen content,chemical composition,casting process parameters,and environmental humidity on porosity in the semi-continuous casting process of aluminum alloy were systematically analyzed.The control measures for reducing porosity in 2A12 aluminum alloy billets have been proposed.

关 键 词：2A12铝合金 圆铸锭 熔铸 疏松 空气湿度 铸造工艺参数 

分 类 号：TG292[金属学及工艺—铸造]