Al-6.3Zn-2.0Mg-0.32Cu合金熔铸工艺与质量控制  

Melting and casting process and quality control of Al-6.3Zn-2.0Mg-0.32Cu aluminum alloy

作　　者：徐凡凡 李亨[1] 许延琛 王东明 李玉坤 钱跃荣 吴玉程[1] Xu Fanfan;Li Heng;Xu Yanchen;Wang Dongming;Li Yukun;Qian Yuerong;Wu Yucheng(Anhui Province Key Laboratory of Aeronautical Structural Parts Forming,Manufacturing and Equipment,Hefei University of Technology,Hefei Anhui 230009,China;Chizhou Jiuhua Mingkun Aluminum Co.,Ltd.,Chizhou Anhui 247100,China;Anhui Guangyin Aluminum Co.,Ltd.,Hefei Anhui 231121,China)

机构地区：[1]合肥工业大学航空结构件成形制造与装备安徽省重点实验室,安徽合肥230009 [2]池州市九华明坤铝业有限公司,安徽池州247100 [3]安徽广银铝业有限公司,安徽合肥231121

出　　处：《金属热处理》2023年第6期23-28,共6页Heat Treatment of Metals

基　　金：安徽省发改委创新工程项目“新能源汽车用低成本铝合金及成形关键技术开发与产业化应用”(JZ2022AFKJ0032);中央高校基本科研业务费专项资金(JZ2021HGTB0100,PA2020GDSK0076);安徽省科技重大专项(JZ2019AKKZ0268)。

摘　　要：通过光学显微镜(OM)、场发射扫描电镜(SEM)和X射线衍射分析仪(XRD)等设备从炉料、熔炼、炉内精炼、熔体在线净化处理以及铸造工艺参数等方面研究Al-6.3Zn-2.0Mg-0.32Cu铝合金铸锭的熔铸工艺。结果表明,回炉料控制在10%以内,同时将Zn/Mg比例设定为3.2,采用双转子精炼系统进行熔炼,再分别将铸造速度、铸造温度和冷却水流量设定为64~69 mm/min、700~715℃和138~144 m^(3)/h/根,能使熔体含氢量控制在0.14 mL/100 g之内,降低含渣量和铸锭偏析,为后续该规格铝合金铸锭的生产提供数据支持。Melting and casting process of Al-6.3Zn-2.0Mg-0.32Cu aluminum alloy ingots was investigated by optical microscope(OM),field emission scanning electron microscopy(SEM)and X-ray dfraction analyzer(XRD)in aspects of furnace charge,melting,in-furnace refining,online purification treatment of melt and casting process parameters.The results show that the hydrogen content of melt can be controlled within 0.14 mL/100 g,and slag content and ingot segregation can be reduced by controlling the reflow material within 10%and the Zn/Mg ratio being set to 3.2,the melting carries out by a double-rotor refining system,and the casting speed,casting temperature and cooling water flow rate being set to 64-69 mm/min,700-715℃ and 138-144 m^(3)/h/root,respectively,which provides data support for the subsequent production of aluminum alloy ingots of this specification.

关 键 词：Al-6.3Zn-2.0Mg-0.32Cu合金 成分设计 熔铸工艺 偏析 

分 类 号：TG166.3[金属学及工艺—热处理]