Interface characteristics of 7075/6009 gradient aluminum alloy prepared by continuous casting

Zhang Weiwen Zhen Xiaoping Huang Qiang Li Yuanyuan

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Interface characteristics of 7075/6009 gradient aluminum alloy prepared by continuous casting
Issue S1, Pages: 344-346(2008)
Published： 2008 ，
DOI：

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[1]张卫文,郑小平,黄强,李元元.7075/6009梯度复合铝合金的界面特征[J].特种铸造及有色合金,2008(S1):344-346.

Zhang Weiwen Zhen Xiaoping Huang Qiang Li Yuanyuan. Interface characteristics of 7075/6009 gradient aluminum alloy prepared by continuous casting. [J]. Special Casting & Nonferrous Alloys (S1):344-346(2008)
[1]张卫文,郑小平,黄强,李元元.7075/6009梯度复合铝合金的界面特征[J].特种铸造及有色合金,2008(S1):344-346. DOI：

Zhang Weiwen Zhen Xiaoping Huang Qiang Li Yuanyuan. Interface characteristics of 7075/6009 gradient aluminum alloy prepared by continuous casting. [J]. Special Casting & Nonferrous Alloys (S1):344-346(2008) DOI：

摘要

采用双流浇注半连续铸造方法制备了直径为65mm的7075/6009铝合金梯度材料。研究了内导管节流孔径对铸件的成分分布、宏观组织和洛氏硬度的影响

重点分析了该工艺参数对研制合金界面组织特征的影响。结果表明

7075/6009复合材料铸锭中存在一个5mm左右的过渡层

过渡层与外层合金之间的界面清晰

但与内层合金的界面难以区分。在保证铸造过程顺利进行的前提下

适当增大节流孔径能显著减少铸件外层合金的厚度

但对过渡层厚度的影响很小。

Abstract

7075/6009 gradient materials were prepared by continuous casting using double-stream-pouring technique. The effects of throttle bore diameter of submerged embedded nozzle on composition

macrostructure and Rockwell hardness of the alloys were investigated. Main attention is paid to the interface characteristics of the alloy ingot. The results show that there is a transition layer about 5 mm in thickness in the alloy ingot. The interface boundary between external layer and transition layer is clear. However

the interface boundary between internal layer and transition layer is difficult to clarify. With the increase in the throttle bore diameter

the thickness of the external layer of the developed alloy increase but the throttle bore diameter has little effect on the thickness of the transition layer.