7M85铝合金超大直径圆铸锭熔铸工艺研究  

Research on Melting and Casting Technology of 7M85 Aluminum Alloy Ultra-large Diameter Billet

作　　者：石景岩 吴桂春 SHI Jing-yan;WU Gui-chun(Linyi LiXin Aluminum Industry Co.,Ltd.,Linyi 276022,China;Leike Zhitu(Tai'an)Automotive Technology Co.,Ltd.,Tai'an 271025,China)

机构地区：[1]临沂利信铝业有限公司,山东临沂276022 [2]理工雷科智途(泰安)汽车科技有限公司,山东泰安271025

出　　处：《山东工业技术》2024年第3期123-127,共5页Journal of Shandong Industrial Technology

摘　　要：7M85铝合金是美国铝业公司为Airbus在制造A380客用飞机大型整体化[1,2]研发的锻造用高淬火、高强耐韧合金,但由于其高浓度的合金成分,且大规格铸棒铸造成型较难、质量控制要求较高,同行业铝熔铸企业基本没有工业化量产和经验的借鉴,本文着重通过实质性多炉次的生产铸造实践,先后完成对铸造成型的摸索、大尺寸高浓度合金铸锭宏观化学成分(Cu、Mg、Zn、Ti、Zr)偏析规律分析、均匀化效果及显微组织检测、分析与验证,最终确定了合理的铸造速度、温度及冷却强度,检测到在该铸造工艺下7M85合金严重的宏观成分偏析、低倍偏析层厚度较大、晶粒度二级;通过不同制度均匀化实验的对比,获得了最合适的均匀化工艺。为同行业在超大直径7M85合金圆铸锭熔铸生产提供了工业性实践与参考。Alcoa used high-strength,high-quenched 7M85 aluminum alloy for Airbus in the manufacture of integral and large-scale forgings for A380 passenger aircraft.but because of its higher concentration alloy composition,and large size casting rod casting molding is difficult,high quality control requirements,aluminum smelting and casting enterprises in the same industry basically have no experience in industrial mass production and reference,this paper focuses on the production and casting practice of substantive multi-furnace,completed the exploration of casting molding,the analysis of the segregation law of the macro-chemical composition(Cu,Mg,Zn,Ti,Zr)of large-size high-concentration alloy ingot,the detection,analysis and verification of the homogenization effect and microstructure,respectively.finally,reasonable casting parameters such as casting speed,temperature and cooling strength were determined.it is detected that 7M85 alloy has serious macroscopic composition segregation,large thickness of low-double segregation layer and second-order grain size under the casting process.through the comparison of homogenization experiments of different systems,the most suitable homogenization process is obtained.it provides industrial practice and reference for the industry in the production of super-large 7M85 alloy round ingot casting.

关 键 词：7M85合金 宏观偏析 均匀化 显微组织 

分 类 号：TG245[金属学及工艺—铸造]