摘要
某石化企业乙烯裂解炉现场HP Low C材质静态铸造管件母材,在射线检测(RT)过程中出现黑色影像显示,通过光学和电子金相观察,同时结合射线检测和渗透检测(PT)等无损检测方法进行验证,判定黑色影像属于局部晶粒粗大引起的晶间衍射产生的非缺陷类影像显示。文章指出,采用改变X射线入射角和射线能量、增加增感屏滤波等方法可以减少或消除RT检测非缺陷类影像显示。
Black image on the base material of HP Low C static casting pipe elements in ethylene cracking furnace of a petrochemical enterprise appeared in the process of radiographic testing (RT). Through verification of optical and electronic metallographic observation combining with radiographic testing and penetrant testing (PT) and other non-destructive testing methods, it is determined that the black image is non-defective image display due to intergranular diffraction caused by local coarse grain. This paper points out that non-defective image display from RT testing can be reduced or eliminated by changing the incident angle and energy of X-ray and adding the film hanger wave filtering.
作者
刘建杰
储拥军
陈俊海
连晓明
Liu Jianjie;Chu Yongjun;Chen Junhai;Lian Xiaoming(Hefei General Machinery Research Institute Co.,Ltd.,Hefei,Anhui,230031)
出处
《石油化工设备技术》
CAS
2019年第1期34-37,68,69,共6页
Petrochemical Equipment Technology
基金
国家重点研发计划(2017YFF0210402)
安徽省杰出青年科学基金自助(项目编号:1708085J05)
关键词
静态铸造管件
射线检测
渗透检测
非缺陷类影像
static casting pipe elements
radiographic testing
penetrant testing
Non-defective image
