7075/6009梯度复合铝合金的界面特征  

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

作　　者：张卫文[1] 郑小平[1] 黄强[1] 李元元[1] 

机构地区：[1]华南理工大学机械与汽车工程学院

出　　处：《特种铸造及有色合金》2008年第S1期344-346,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50575076;59905007);广东省自然科学基金资助项目(994250)

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。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,...

关 键 词：7075/6009 梯度材料 连续铸造 界面 

分 类 号：TG146.21[一般工业技术—材料科学与工程]