用超声衍射时差法对焊缝缺陷定性表征
Characterization of the Defects in Welds by Ultrasonic Time-of-Flight Diffraction Technique
摘 要
采用超声衍射时差法（TOFD）检测焊缝中大量的缺陷，分析各类典型缺陷的响应特征，总结用TOFD技术对缺陷定性的方法，并与普通超声波检测结果进行对比。较之普通超声波检测，TOFD法直观，信息量大，对人员的依赖性低且定性准确。
衍射时差法
焊缝
缺陷定性
Ultrasonic testing
Time-of-flight diffraction
Weld
Flaw discrimination
Abstract
Many defects in welds were detected by ultrasonic time-of-flight diffraction(TOFD) technique. The signal characteristics responded by the typical defects in weld were analyzed. The discrimination of defects by TOFD was described in detail and the results were compared with those by normal ultrasonic testing. It was showed that TOFD technique was superior to normal ultrasonic testing technique in intuitive display, abundant information and inspector-independent detection and accurate defect discrimination.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目
收稿日期 2004/12/20
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引用该论文: LIANG Hong-lin,TENG Yong-ping,LU Xiang-hui. Characterization of the Defects in Welds by Ultrasonic Time-of-Flight Diffraction Technique[J]. Nondestructive Testing, 2006, 28(1): 14～16
梁宏林,滕永平,吕香慧. 用超声衍射时差法对焊缝缺陷定性表征[J]. 无损检测, 2006, 28(1): 14～16
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参考文献
【1】Charlesworth JP, Temple JAG. Engineering Applications of Ultrasonic Time-of-Flight-Diffraction\[M\]. Taunton Somerset, England: Research Studies Press Ltd,1989.
【2】Dijkstra FH, Raad de JA, Bouma T. TOFD & Acceptance criteria: A perfect team\[M\]. Rotterdam, The Netherlands: Rtgen Technische Dienst bv,1998.
【3】马 崇.超声波TOFD检测技术\[J\].华北电力技术,2003,(9):31-33.
【4】ENV 583-6(1997), Non-destructive Testing — Ultrasonic Examination — Part 6: Time-of-Flight Diffraction Technique as a Method for Defect Detection and Sizing［S］.
【2】Dijkstra FH, Raad de JA, Bouma T. TOFD & Acceptance criteria: A perfect team\[M\]. Rotterdam, The Netherlands: Rtgen Technische Dienst bv,1998.
【3】马 崇.超声波TOFD检测技术\[J\].华北电力技术,2003,(9):31-33.
【4】ENV 583-6(1997), Non-destructive Testing — Ultrasonic Examination — Part 6: Time-of-Flight Diffraction Technique as a Method for Defect Detection and Sizing［S］.
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