Al-4.5wt%Mg合金粗大金属化合物的缺陷分析  

Defects Analysis of Coarse Metal Compound in Al-4.5 wt%Mg Alloy

作　　者：郑许[1,2] 唐建国 张航 彭斐[1] 何克准[1] ZHENG Xu;TANG Jianguo;ZHANG Hang;PENG Fei;HE Kezhun(Guangxi Alnan Aluminium Co.,Ltd.,Nanning 530031,China;School of Materials Science and Engineering,China Central South University,Changsha 410083,China)

机构地区：[1]广西南南铝加工有限公司,广西南宁530031 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《热加工工艺》2022年第1期155-160,共6页Hot Working Technology

基　　金：广西创新驱动发展专项资金项目(桂科AA17202007);南宁市科学与技术研究项目(20191015)。

摘　　要：水浸式相控阵超声纵波技术和接触式超声纵波技术被应用于Al-4.5wt%Mg铝合金轧制板的无损检测以评估不连续性的缺陷当量尺寸和位置。本文使用光学显微镜、SEM和EDS方法对不连续缺陷进行分析。在考虑Mg元素成分含量影响的条件下,使用CALPHAD技术研究化学成分对合金的影响,并通过金相统计方法验证了使用水浸式相控阵超声波C扫描数据推测出来的Al_(7)(Cr,Mn,Ti)相比例。结果表明:粗大金属化合物主要由Al_(7)Cr相组成,其中固溶Mn、Fe、Ti元素;粗大金属化合物的驱动力在特定的化学成分范围内显著提高,而且存在相对安全的化学成分区域。Flooding phased array ultrasonic longitudinal wave technology and contact ultrasonic longitudinal wave technology are applied to non-destructive testing of Al-4.5 wt%Mg aluminum alloy rolled plates to assess equivalent dimensions and positions of discontinuous defect.The discontinuity was analyzed by using optical microscopy,SEM and EDS methods.Under the condition of considering the influence of Mg element content,the influence of chemical composition on the alloy was studied by using CALPHAD technology,the Al_(7)(Cr,Mn,Ti)phase proportion inferred from ultrasonic C scanning data using water-immersed phased array was verified by metallographic statistics.The results show that the coarse metal compounds are mainly composed of Al_(7)Cr phase,with the solid solution of Mn,Fe,Ti elements.The driving force of coarse metal compounds is significantly increased in a specific chemical composition range,and there are relatively safe chemical composition regions.

关 键 词：粗大金属化合物 Al-Mg铝合金 缺陷分析 

分 类 号：TG339[金属学及工艺—金属压力加工]