高温合金闭式叶轮的工业CT检测  

Industrial CT testing for superalloy enclosed impeller

作　　者：吕健 满月娥 刘涛 谢先文 王朋旭 卢艳平[3] LV Jian;MAN Yuee;LIU Tao;XIE Xianwen;WANG Pengxu;LU Yanping(AECC South Industry Company Limited,Zhuzhou 412002,China;Chongqing Zhence Science and Technology Co.,Ltd.,Chongqing 401332,China;Engineering Research Center of Industrial CT Non-Destructive Testing of Education Ministry of Chongqing University,Chongqing 400044,China)

机构地区：[1]中国航发集团南方航空工业集团有限公司,株洲412002 [2]重庆真测科技股份有限公司,重庆401332 [3]重庆大学工业CT无损检测教育部工程研究中心,重庆400044

出　　处：《无损检测》2020年第4期23-26,共4页Nondestructive Testing

摘　　要：高温合金闭式叶轮为多层、薄壁、曲面流道的内腔与较大直径轴颈相连的整体复杂结构,使用透照电压不高于450kV的传统X射线照相方法对其进行检测时,存在X射线无法穿透叶轮厚大区域以及无法实现缺陷定位的问题,为此采用高能X射线工业计算机断层扫描(CT)方法对其进行检测。为了验证CT检测方法的缺陷检出能力,在高温合金闭式叶轮上加工已知尺寸的人工孔并进行检测,证明可检出φ0.5mm的孔。最后,对闭式叶轮的实际缺陷进行检测,可实现其内部气孔、缩孔等缺陷的检测和定位。Superalloy closed impeller has complex structure with multi-layer,thin-walled,curved inner chamber connected with larger diameter journal.When it is tested by traditional X-ray radiography,there are some problems such as X-ray can not penetrate the thick area of impeller and defects can not be located.Therefore,high-energy Xray industrial CT testing method is used.In order to verify the defect detection ability,the artificial holes of known sizes were machined on the closed impeller to be tested.The result shows that the holes ofφ0.5 mm can be detected.By detecting the actual defects in the closed impeller,the internal defects such as pore and shrinkage can be detected and located.

关 键 词：工业CT 叶轮 检测 

分 类 号：TG115.28[金属学及工艺—物理冶金]