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。
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.
出处
《无损检测》
2010年第5期364-366,共3页
Nondestructive Testing
关键词
超声衍射时差法
堆焊层
裂纹缺陷
Time of flight diffraction technique
Overlay welding
Crack
