Effect of Cross-slot Defect in welded joint on Ultrasonic Test

[摘要] This paper focuses on the influence of vertical hole defects on the ultrasonic propagation characteristics, which are studied from two aspects of the propagation characteristics of the base metal and the ultrasonic waves of the weld, respectively. The acoustic reflection characteristics of the reflector are compared with the acoustic reflection characteristics of the two different welding processes, manual welding and automatic welding, and the properties of the base material. It is shown that the cross-slot of the weld is different from the cross-slot in the base metal, and the attenuation of the ultrasonic wave in the base metal and the weld is different. The gain compensation is too large, and the automatic welding gain compensation ratio of the upper groove of the weld is lower. The automatic welding gain compensation of the cross-slot is large, and the manual welding gain compensation of the lower cross-slot is higher than that of the automatic welding, and the cross-slot gain compensation of the automatic welding upper surface weld is higher than that of the manual welding.

[发布机构] Shanghai Inst. of Special Equip. Inspection and Tech. Res., Putuo, Shanghai; 200062, China^1;Shanghai Engineering Research Center of Pressure Pipeline Intelligent Inspection, Putuo, Shanghai; 200062, China^2

[学科分类] 环境科学（综合）

[关键词] Acoustic reflection;Automatic welding;Base material;Gain compensations;Hole defect;Propagation characteristics;Upper surface;Welding process