六边形外套管与过渡接头搭接环焊缝的X射线检测  

X-ray detection of lap girth weld between hexagonal outer casing and transition joint

作　　者：张小刚 俞东宝[1] 张启星[1] 王靳瑶 成志飞 ZHANG Xiaogang;YU Dongbao;ZHANG Qixing;WANG Jinyao;CHENG Zhifei(China North Nuclear Fuel Co.,Ltd.,Baotou 014035,China)

机构地区：[1]中核北方核燃料元件有限公司,内蒙古包头014035

出　　处：《物理测试》2023年第6期32-37,共6页Physics Examination and Testing

摘　　要：燃料组件是反应堆中不可缺少的重要部件,其焊接质量直接影响组件的使用寿命和反应堆的安全运行,X射线检测是焊缝质量监控的有效手段。依据外套管与过渡接头焊接的技术要求,以外套管与过渡接头对接焊缝(氩弧焊)为研究对象,建立相应的X射线数字成像检测方法,结合目视外观检测及金相内部结构检测,分析鱼鳞纹、焊瘤、透照厚度差及配合间隙等非缺陷因素在X射线数字成像中的图像特征,排除鱼鳞纹、焊瘤、透照厚度差的影像干扰,同时对气孔、未焊透、气胀等实际缺陷进行特征分析,实现外套管与过渡接头环焊缝的准确评价。Fuel assembly is an indispensable and important component in the reactor.The welding quality directly affects the service life of the component and the safe operation of the reactor.X-ray inspection is an effective approach to monitor the weld quality.According to the technical requirements of welding between outer casing and transition joint,the butt weld(argon arc welding) between outer casing and transition joint was selected as the research object.The relevant X-day digital imaging inspection method was established.Combined with visual appearance detection and metallographic internal structure detection,the image features of non-defect factors such as fish scale,welding nodules,different penetration thickness and gaps in X-day digital imaging were analyzed.The imaging interference of fish scale,welding nodules,different penetration thickness and gaps was eliminated.Meanwhile,the characteristics of actual defects such as air holes,incomplete penetration and air bulking were analyzed.The accurate evaluation of girth weld between outer casing and transition joint was realized.

关 键 词：外套管与过渡接头 环焊缝 X射线检测 数字成像 

分 类 号：TG441.7[金属学及工艺—焊接]