Influence of Cross-hole Defects of 9Ni Steel on Ultrasonic Testing

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Yannan, Du^1^2 ; Xuchen, Zhu^1 ; Weiping, Zhu^1 ; Xiaoying, Tang^1^2 ; Xiaolong, Xue^1^2 ; Ju, Ding^1

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

关键词: 9ni steels;    Acoustic emission characteristics;    Automatic welding;    Base metals;    Cross hole;    Crosshole tests;    Weld seam;    Welding process;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/4/042035/pdf
DOI  :  10.1088/1755-1315/310/4/042035

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The cross-hole test block test, the acoustic emission characteristics of the system base metal, manual welding and automatic welding for each defect, the research shows that the attenuation of the ultrasonic wave in the base metal and the weld is different, and the attenuation in the weld is greater. Because the welding process causes the coarse crystal structure in the weld, the attenuation of the ultrasonic wave in the weld is increased, and the sensitivity of the weld detection is also increased. Ultrasonic waves pass through the manual weld seam longer than the automatic weld.