徐振,马廷跃,刘洋,于晓明,郭菁,李胜利,王洪斌.Zn对Al-Zn-Mg-Cu铸轧板组织和裂纹影响[J].稀有金属材料与工程,2020,49(12):4064~4071.[Zhen Xu,Yueting Ma,Yang Liu,Xiaoming Yu,Jing Guo,Shengli li,Hongbin Wang.Effects of Zn content on the microstructure and cracks during twin-roll casting of Al-Zn-Mg-Cu cast-rolled strips[J].Rare Metal Materials and Engineering,2020,49(12):4064~4071.]
Zn对Al-Zn-Mg-Cu铸轧板组织和裂纹影响
投稿时间:2020-05-07  修订日期:2020-11-18
中文关键词:  铝合金  双辊铸轧  Al-Zn-Mg-Cu合金薄板  裂纹
基金项目:NSFC (51874172), Natural Science Foundation Project of Liaoning Province.( 2019-ZD-0025 ), Youth Foundation of the University of Science and Technology Liaoning ( 2019QN09 )
中文摘要:
      本文研究了五种不同Zn含量的铸轧Al-Zn-Mg-Cu合金(3.5 wt %,5 wt %,6.5 wt %,8 wt %和10 wt %,分别标记为Zn3.5,Zn5,Zn6.5,Zn8和Zn10)的宏观裂纹和微观组织。研究结果表明,Zn含量由10 wt %减少至5 wt %时,铸轧条带的宏观裂纹数量明显降低;但当Zn含量由5 wt %减少至3.5 wt %时,裂纹数量减少十分有限。铸轧条带显微组织从表层到中心呈柱状晶向等轴晶的转变。随着Zn含量的增加,铸轧板中心低熔点共晶相偏聚带变宽,粗大非平衡共晶相数量增多,偏析加重。在高Zn含量(10 wt %)的铸轧条带组织中有明显的孔洞存在。
Effects of Zn content on the microstructure and cracks during twin-roll casting of Al-Zn-Mg-Cu cast-rolled strips
英文关键词:Aluminum alloys  twin-roll casting  Al-Zn-Mg-Cu strips  crack
英文摘要:
      The microstructure and macroscopic cracks of five twin-roll cast Al-Zn-Mg-Cu alloys strips with various Zn contents (3.5 wt pct, 5 wt pct, 6.5 wt pct, 8wt pct, and 10 wt pct, marked as Zn3.5, Zn5, Zn6.5, Zn8, and Zn10, respectively) were investigated. The results showed that the macroscopic cracks of strips decreased in numbers as the Zn content decreased from 10 wt pct to 5 wt pct, while this decrease was inhibited as the Zn content continuously decreased from 5 wt pct to 3.5 wt pct. The microstructure sustained a transition from columnar crystals to equiaxed crystals along the surface to the center of the cast strip. The center segregation band of the cast strips became wider and the non-equilibrium coarse eutectic phases increased in amount as the Zn content increased in these Al-Zn-Mg-Cu strips. Unsolidified liquid phases and holes appeared in the microstructures of strips of high Zn content.
作者单位E-mail
徐振 辽宁科技大学 ustlxuzhen2020@163.com 
马廷跃 辽宁科技大学  
刘洋 华东理工大学  
于晓明 沈阳理工大学  
郭菁 辽宁科技大学  
李胜利 辽宁科技大学  
王洪斌 辽宁科技大学  
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