[1]郝以运,刘晴岩,张俭,等.TOFD方法在薄壁堆焊层裂纹类缺陷检测中的应用[J].焊管,2009,32(6):36-39.[doi:1001－3938（2009）06－0036－04]
　HAO Yi-yun,LIU Qing-yan,ZHANG Jian,et al.Overlay Welding Crack Testing Based on TOFD[J].,2009,32(6):36-39.[doi:1001－3938（2009）06－0036－04]
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TOFD方法在薄壁堆焊层裂纹类缺陷检测中的应用
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
32
期数:
2009年第6期
页码:
36-39
栏目:
应用与开发
出版日期:
2009-06-28

文章信息/Info

Title:
Overlay Welding Crack Testing Based on TOFD
文章编号:
1001－3938（2009）06－0036－04
作者:
郝以运1; 刘晴岩1; 张俭2; 张伟2
（1.华东理工大学 机械与动力工程学院 承压系统安全科学教育部重点实验室，上海 200237；
2.上海锅炉厂有限公司，上海 200245）
Author(s):
HAO Yi-yun1; LIU Qing-yan1; ZHANG Jian2; ZHANG Wei2
(1.Key Lab of Safety Science of Pressurized System,Ministry of Education,School of Mechanical and Power Engineering, East China University of Science and Technology,Shanghai 200237,China;
2.Shanghai Boiler Works Ltd.,Shanghai 200245,China)
关键词:
超声检测; 超声衍射时差法（TOFD）; 堆焊层; 裂纹缺陷
Keywords:
ultrasonic testing; TOFD(time of flight diffraction) technology; overlay welding; crack
分类号:
TH878
DOI:
1001－3938（2009）06－0036－04
文献标志码:
B
摘要:
针对薄壁堆焊结构裂纹类缺陷定位、定量检测的需要，引入TOFD(time of flight diffraction)超声检测系统进行了堆焊层缺陷的检测方法研究。研究了裂纹类缺陷超声衍射时差法的检测特征，分析了不同角度探头和不同探头间距对近表面裂纹类缺陷检测结果的影响。研究结果表明，TOFD法可以检测到堆焊层表面下3～10mm内的垂直裂纹，结合A扫描信号和B、D扫描图像的特征，能够有效地对裂纹状缺陷进行识别、定位和定量，为堆焊质量评价提供可靠准确的依据。
Abstract:
For the purpose of identify and size Cracktype defects in the structure of overlay welding,the detection approach of the time of flight diffraction(TOFD) was adopted in this research.Studied it’s detect features,analyzed and interpreted it’s characteristics of Ascanning signals and Bscanning,Dscanning images.The results showed that this approach can detect vertical cracks correctly located from 2~10mm under the surface.Combined with Ascanning signals and Bscanning,Dscanning images that can identify,located and quantify cracklike defects effectively.This testing technology is valuable for inspector to estimate the quality of surfacing welding and also provides more reliable and accurate information.

参考文献/References:

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［2］许遵言.不锈钢及镍基堆焊层厚度测量［J］.锅炉技术,2002,33(3)：17-20.
［3］MIHARA T，OTSUKA Y，CHO H，et a1.Time of Flight Diffraction Measurement Using Laser Ultrasound［J］.Experiment Mechanics，2006，46：561-567［4李衍.超声TOFD法原理和标准介绍［J］.无损探伤,2003,27(3)：1-4.
［5］李衍.超声TOFD原理和方法要领［J］.无损检测,2007,29(2)：88-93.
［6］HONARVAR F,SHEIKHZAD H,MOLES M,et al.Improving the Timeresolution and Signaltonoise Ratio of Ultrasonic NDE Signals［J］.Ultrasonics,2004（4）：755-763.

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备注/Memo

备注/Memo:
作者简介：郝以运，男，硕士研究生，主要研究方向为超声波检测技术及应用。
收稿日期：2008－11－10
更新日期/Last Update: