Sc、Zr对Al-Zn-Mg-Cu合金挤压铸造组织性能的影响

王志刚; 徐骏; 张志峰; 李豹

doi:10.15980/j.tzzz.2013.09.009

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Sc、Zr对Al-Zn-Mg-Cu合金挤压铸造组织性能的影响
Effect of Sc and Zr Compound Addition on Microstructures and Properties of the Squeeze Cast Al-Zn-Mg-Cu Alloy
2013年33卷第9期页码：797-800
纸质出版日期： 2013 ，
DOI： 10.15980/j.tzzz.2013.09.009

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[1]王志刚,徐骏,张志峰,李豹.Sc、Zr对Al-Zn-Mg-Cu合金挤压铸造组织性能的影响[J].特种铸造及有色合金,2013,33(09):797-800.

Wang Zhigang, Xu Jun, Zhang Zhifeng, et al. Effect of Sc and Zr Compound Addition on Microstructures and Properties of the Squeeze Cast Al-Zn-Mg-Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2013,33(9):797-800.
[1]王志刚,徐骏,张志峰,李豹.Sc、Zr对Al-Zn-Mg-Cu合金挤压铸造组织性能的影响[J].特种铸造及有色合金,2013,33(09):797-800. DOI： 10.15980/j.tzzz.2013.09.009.

Wang Zhigang, Xu Jun, Zhang Zhifeng, et al. Effect of Sc and Zr Compound Addition on Microstructures and Properties of the Squeeze Cast Al-Zn-Mg-Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2013,33(9):797-800. DOI： 10.15980/j.tzzz.2013.09.009.

摘要

通过对Al-Zn-Mg-Cu合金复合添加微量Sc、Zr元素

研究了其在普通金属型铸造和挤压铸造态的组织性能。结果发现

通过Sc、Zr的复合添加

有效细化了Al-Zn-Mg-Cu合金的铸态组织

降低了枝晶偏析

提高了合金的力学性能;通过挤压铸造成形

不仅可以提高合金的致密性

减少缩松、裂纹等缺陷

同时对合金凝固组织具有一定的细化作用。通过微合金化和挤压铸造成形方式的结合

最终可得到均匀细化、致密、少缺陷的合金组织。

Abstract

Trace elements Sc and Zr were added into the Al-Zn-Mg-Cu alloys

and the differences of the microstructures and properties of the alloy prepared were compared in gravity casting and in squeeze casting.The results show that through the addition of trace elements Sc and Zr

as-cast microstructure of the Al-Zn-Mg-Cu alloys is refined effectively

and dendrite segregation is relieved

so the mechanical properties of alloy are improved.Through squeeze casting

the compactness of the alloys is improved

and the probability of occurrence of shrinkage porosity（holes）and segregation are decreased.In addition

the grain can be refined by the pressure on the alloy melt.Combined the element Sc-Zr microalloying with squeeze casting

Al-Zn-Mg-Cu alloy with uniform

compact

little defect microstructures can be obtained

which provides a new way to the Al-Zn-Mg-Cu alloy forming.