金属热处理 ›› 2023, Vol. 48 ›› Issue (6): 23-28.DOI: 10.13251/j.issn.0254-6051.2023.06.004

• 工艺研究 • 上一篇    下一篇

Al-6.3Zn-2.0Mg-0.32Cu合金熔铸工艺与质量控制

徐凡凡1, 李亨1, 许延琛1, 王东明2, 李玉坤2, 钱跃荣3, 吴玉程1   

  1. 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
  • 收稿日期:2022-11-14 修回日期:2023-04-14 发布日期:2023-08-11
  • 通讯作者: 李亨,副研究员,博士,E-mail:liheng0205@hfut.edu.cn
  • 作者简介:徐凡凡(1997—),男,硕士研究生,主要研究方向为材料成形过程与技术,E-mail:3160043766@qq.com。
  • 基金资助:
    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)

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

Xu Fanfan1, Li Heng1, Xu Yanchen1, Wang Dongming2, Li Yukun2, Qian Yuerong3, Wu Yucheng1   

  1. 1. Anhui Province Key Laboratory of Aeronautical Structural Parts Forming, Manufacturing and Equipment, Hefei University of Technology, Hefei Anhui 230009, China;
    2. Chizhou Jiuhua Mingkun Aluminum Co., Ltd., Chizhou Anhui 247100, China;
    3. Anhui Guangyin Aluminum Co., Ltd., Hefei Anhui 231121, China
  • Received:2022-11-14 Revised:2023-04-14 Published:2023-08-11

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 m3/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。

关键词: Al-6.3Zn-2.0Mg-0.32Cu合金, 成分设计, 熔铸工艺, 偏析

Abstract: 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 diffraction 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 m3/h/root, respectively, which provides data support for the subsequent production of aluminum alloy ingots of this specification.

Key words: Al-6.3Zn-2.0Mg-0.32Cu alloy, composition design, melting and casting process, segregation

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