Acta Metallurgica Sinica (English Letters) ›› 2011, Vol. 24 ›› Issue (5): 399-404.DOI: 10.11890/1006-7191-115-399

• 研究论文 • 上一篇    下一篇

铸造速度对水平连铸7075铝合金铸锭表面质量的影响

朱庆丰1,赵志浩2,崔建忠1,王向杰2,秦克3   

  1. 1. 东北大学
    2. 东北大学材料电磁过程教育部重点实验室
    3.
  • 收稿日期:2010-09-14 修回日期:2010-12-14 出版日期:2011-10-25 发布日期:2011-10-18
  • 通讯作者: 朱庆丰

Effect of casting speed on surface quality of horizontal direct chill casting 7075 aluminum alloy ingot

Qingfeng ZHU, Zhihao ZHAO, Jianzhong CUI, Xiangjie WANG，Ke QIN   

  1. Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
  • Received:2010-09-14 Revised:2010-12-14 Online:2011-10-25 Published:2011-10-18
  • Contact: Qingfeng ZHU

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Abstract: 7075 aluminum alloy ingot with the diameter of 100 mm has been produced by horizontal direct chill casting in different casting speed. The effect of the casting speed on the ingot surface and subsurface layer was studied by surface observation and subsurface structure analysis. It was found that increasing the casting speed results in the adding of segregation knots in the ingot surface. The thickness of the dendrite microstructure layer in the subsurface reduces with increasing the casting speed. And the elements of Zn, Cu and Mg enrich in the coarse dendrite microstructure layer of the ingot.

Key words: Horizontal direct chill casting, Casting speed, 7075 aluminum alloy, Surface quality