超声波检测海洋石油平台环板焊缝母材缺陷  

Ultrasonic Testing Offshore Oil Platform Ring Plate Weld Material Defects

作　　者：常宇[1] 蒋桂通 王兴国[1] Chang Yu;Jiang Guitong;Wang Xingguo(Offshore Oil Engineering Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]海洋石油工程股份有限公司,天津300450

出　　处：《机电工程技术》2022年第10期258-260,共3页Mechanical & Electrical Engineering Technology

摘　　要：主要研究在超声波检测海洋石油平台环板T型焊缝时遇到的一种特殊反射信号,此信号并不在焊缝内部,也不在热影响区,亦不是常规母材夹层缺陷。为了判定此信号的性质,利用USM35超声波探伤仪和某公司生产的5Z10*10A45、5Z10*10A60、5Z10*10A70的横波斜探头及5Z20N的纵波直探头对此信号进行多角度多方向检测,通过数据分析得出此信号为一种罕见的母材内部空洞,并且通过气刨验证确实如此。这种缺陷不同于钢板夹层和母材撕裂,是具有一定宽度、高度和长度的气孔,在此称之为钢板母材穿孔,对海洋石油平台环板强度的影响非常大,此发现和研究保障了工程项目的关键结构质量,同时为焊缝超声波检测技术的发展提供了依据。A special reflection signal encountered in ultrasonic inspection of T-weld of annular plate of offshore oil platform was studied. The signal was not in the weld,nor in the heat affected zone,nor in the defect of the sandwich of conventional base metal. In order to determine the nature of the signal,the USM35 ultrasonic flaw detector and Shantou ultrasonic 5Z10 *10A45,5Z10 *10A60,5Z10 *10A70 shear wave oblique probe and 5Z20N longitudinal wave direct probe were used for multi-angle and multi-direction detection of the signal. Through data analysis,it was concluded that the signal was a rare internal cavity of the base metal. And it was confirmed by air gouging. The defect was different from steel plate sandwich and base metal tear,and was called steel plate base metal perforation with a certain width,height and length.It had a great impact on the strength of the ring plate of offshore oil platform. The discovery and research ensured the key structural quality of engineering projects,and provided a basis for the development of ultrasonic detection technology of welding seams.

关 键 词：环板 T型焊缝 超声波检测 母材穿孔 

分 类 号：TG441.[金属学及工艺—焊接]