船舶大合拢焊缝交叉部位的TOFD检测方法
Inspection of the Crossed Areas of Welds Joining Hull Sections by Time-of-Flight Diffraction Technique
摘 要
利用超声衍射时差(TOFD)技术检测船舶大合拢焊缝交叉部位时，为了覆盖由于焊缝余高带来的扫查盲区，设计了与焊缝成45°夹角的两次斜向扫查的专用TOFD检测工艺，并推导了计算缺陷长度和深度的公式，以修正斜向扫查带来的缺陷长度和深度值误差。使用该工艺和计算公式在现场检测了18万吨散货船大合拢焊缝交叉部位共46处，与X射线照相结果相比，设计的TOFD检测方法能够基本满足检测要求。
交叉部位
TOFD检测
Welds of joining hull sections
Crossed areas
TOFD
Abstract
A special TOFD inspection procedure has been designed to cover the blind testing zone due to the weld reinforcement height when testing the crossed areas of longitudinal and transverse welds joining hull sections. It uses TOFD probe pairs scanning along two 45°angled paths towards the welds direction. In order to eliminate measurement error brought by angled scanning, several formulae have been derived to compute the corrected values for defects length and depth. Using the designed procedure, 46 crossed areas have been inspected successfully on the 180 kiloton cargo vessel. After comparing the TOFD results to radiographic testing, the TOFD inspection procedure validation has been demonstrated, which could satisfy the requirement of testing crossed areas of welds.
中图分类号 TG115.28
所属栏目 试验研究
基金项目 中国船级社重点科研资助项目(NL08-01)
收稿日期 2010/6/8
修改稿日期
网络出版日期
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备注李友(1950-)，男，高级工程师，中国船级社无损检测试验室主任，目前主要从事超声相控阵和TOFD技术的应用开发研究，包括检测方案提供、现场检测、新技术研究、设备装置开发、软件开发、推广与培训等。
引用该论文: LI You,CAO Hai-Jing,LIAN Guo-Xuan. Inspection of the Crossed Areas of Welds Joining Hull Sections by Time-of-Flight Diffraction Technique[J]. Nondestructive Testing, 2011, 33(4): 19～21
李友,曹海静,廉国选. 船舶大合拢焊缝交叉部位的TOFD检测方法[J]. 无损检测, 2011, 33(4): 19～21
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参考文献
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【2】李衍，超声TOFD原理和方法精要[J].无损探伤,2006,30(6):8-13.
【3】Hiroaki hatanka, Tomio nakajima, et al, Application of real-time signal processing to ultrasonic testing[C]. The 13th Asia-Pacific Conference on NDT, Yokohama: [s.n.],2009.
【4】Gang Tie, Chi Dazhao. Ultrasonic TOFD testing model for crack measurement in thick wall weldment[C]. 17th World Conference on Nondestructive Testing, Shanghai: ChSNDT,2008.
【5】Verkooijen J. TOFD Used to replace radiography[J]. Insight: Non-Destructive Testing and Condition Monitoring, 1995, 37(6): 433-435.
【6】GB/T 23902—2009无损检测超声检测超声衍射声时技术检测和评价方法[S].
【7】ASME CODE Case 2235-9Use of Ultrasonic Examination in Lieu of Radiography Section I; Section VIII, Division 1 and 2; and Section XII, 2005[S].
【8】ASTM E 2373-04Standard practice for use of the ultrasonic time of flight diffraction (TOFD) technique[S].
【9】BS 7706:1993Guide to Calibration and Setting-Up of the Ultrasonic Time of Flight Diffraction (TOFD) Technique for the Detection, Location, and Sizing Flaws[S].
【10】NEN 1822(en) Acceptance criteria for the Time of Flight Diffraction inspection technique[S].
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【12】马崇，超声波TOFD检测技术[J]. 华北电力技术，2003,(9): 31-33.
【13】Chen Yubao. Application of TOFD echnique on the large pressure vessel[C].17th World Conference on Nondestructive Testing, Shanghai: ChSNDT,2008.
【2】李衍，超声TOFD原理和方法精要[J].无损探伤,2006,30(6):8-13.
【3】Hiroaki hatanka, Tomio nakajima, et al, Application of real-time signal processing to ultrasonic testing[C]. The 13th Asia-Pacific Conference on NDT, Yokohama: [s.n.],2009.
【4】Gang Tie, Chi Dazhao. Ultrasonic TOFD testing model for crack measurement in thick wall weldment[C]. 17th World Conference on Nondestructive Testing, Shanghai: ChSNDT,2008.
【5】Verkooijen J. TOFD Used to replace radiography[J]. Insight: Non-Destructive Testing and Condition Monitoring, 1995, 37(6): 433-435.
【6】GB/T 23902—2009无损检测超声检测超声衍射声时技术检测和评价方法[S].
【7】ASME CODE Case 2235-9Use of Ultrasonic Examination in Lieu of Radiography Section I; Section VIII, Division 1 and 2; and Section XII, 2005[S].
【8】ASTM E 2373-04Standard practice for use of the ultrasonic time of flight diffraction (TOFD) technique[S].
【9】BS 7706:1993Guide to Calibration and Setting-Up of the Ultrasonic Time of Flight Diffraction (TOFD) Technique for the Detection, Location, and Sizing Flaws[S].
【10】NEN 1822(en) Acceptance criteria for the Time of Flight Diffraction inspection technique[S].
【11】陈建玉，袁榕，热壁加氢反应器深厚焊缝的TOFD检测技术[J]. 压力容器，2004, 21(8): 46-48.
【12】马崇，超声波TOFD检测技术[J]. 华北电力技术，2003,(9): 31-33.
【13】Chen Yubao. Application of TOFD echnique on the large pressure vessel[C].17th World Conference on Nondestructive Testing, Shanghai: ChSNDT,2008.
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