| TOFD技术在薄壁堆焊层裂纹缺陷检测中的应用 |
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| 引用本文： | 刘晴岩,郝以运,张俭,张伟.TOFD技术在薄壁堆焊层裂纹缺陷检测中的应用[J].无损检测,2010(5):364-366. |
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| 作者姓名： | 刘晴岩 郝以运 张俭 张伟 |
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| 作者单位： | [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 |
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| 摘 要： | 研究了薄壁堆焊层裂纹类缺陷的TOFD检测技术,讨论了裂纹类缺陷的TOFD检测特征,分析了不同角度探头和不同探头间距检测结果的影响。结果表明,TOFD技术可以检测到表面下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。
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| 关 键 词： | 超声衍射时差法 堆焊层 裂纹缺陷 |
Inspection of Overlay Welding Crack by TOFD Technique |
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| LIU Qing-Yan,HAO Yi-Yun,ZHANG Jian,ZHANG Wei.Inspection of Overlay Welding Crack by TOFD Technique[J].Nondestructive Testing,2010(5):364-366. |
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| Authors: | LIU Qing-Yan HAO Yi-Yun ZHANG Jian ZHANG Wei |
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| Affiliation: | 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) |
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| Abstract: | The overlay welding cracks were inspected by TOFD technique.Detecting features of TOFD of cracks were studied,and the influences of angle and distance of probe pairs on detecting results were analyzed.The results showed that TOFD technique could detect vertical cracks correctly located 3～10 mm under the surface.Combined with A-scanning signals,rescanning and D-scanning images it could identify,locate and quantify crack-like defects effectively,and provide reliable and accurate information for the estimation of the quality of overlay welding. |
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| Keywords: | Time of flight diffraction technique Overlay welding Crack |
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