铸造技术2017，Vol.38Issue(4)：767-770,4.DOI:10.16410/j.issn1000-8365.2017.04.007
稀土La对Al-Zn-Mg-Cu合金铸态组织的影响
Effect of La Addition on As-cast Microstructure of Al-Zn-Mg-Cu Alloy
摘要
Abstract
The effects of La addition on as-cast microstructure of Al-Zn-Mg-Cu alloys were investigated using optical microscope,scanning electron microscope,X-ray diffraction,etc.The results show that the grain size of Al-Zn-Mg-Cu alloys can be effectively inhibited by the addition of La element.However,the refining effect weakens when the La content is over a certain content in Al-Zn-Mg-Cu alloy.The grain size can reduce to 50 μm in the alloy with the addition of 0.3 wt％ La.The second phase particles of Al-Zn-Mg-Cu alloys mainly include η(MgZn2) phase,θ(Al2Cu) phase,S(Al2CuMg) phase and AlZnMgCu phase with La,and distributes in grain boundary.关键词
铝合金/稀土La/铸态组织/第二相Key words
aluminum alloy/rare earth lanthanum/as-cast microstructure/second phases分类
矿业与冶金引用本文复制引用
薛越,李新梅..稀土La对Al-Zn-Mg-Cu合金铸态组织的影响[J].铸造技术,2017,38(4):767-770,4.基金项目
国家自然科学基金资助项目(51561029) （51561029）
