摘要
小直径不锈钢薄壁管广泛应用于电站机组的冷凝器中,常规涡流检测方法难以发现纵向贯通的条状缺陷。在25mm×1mm和38mm×2mm不锈钢管壁上,沿轴向和周向加工深度分别为0.1mm、0.2mm和0.5mm的人工切槽,并进行检测试验研究,确定了兰姆波检测技术对小直径不锈钢薄壁管上人工缺陷的可检性,探讨了对不锈钢薄壁管材进行兰姆波检测的有效性和可靠性,提出以兰姆波检测技术对小直径不锈钢薄壁管进行检测的建议。
Small-diameter stainless steel thin-wall tubes are widely used in the condenser of the power plant units. It is difficult to detect the longitudinal run-through strip defects with Eddy Current methods. Lamb waves method is a new methods of ultrasonic methods on small-diameter stainless steel thin-walled tube. Artificial defects, which along the axial and circumferential on the machining depth of 0. 1 mm, 0.2 mm and 0.5 mm, have been made on a set of stainless steel thin-wall tubes with Ф25 mm×1mm and Ф38 mm×2mm. The tubes were inspected with Lamb waves, then the results was analyzed. The results shown that the Lamb waves testing can be used for artificial defects. And the reliabilities and validities of Lamb waves testing on stainless steel thin-walled tube are preliminary studied.
出处
《失效分析与预防》
2010年第1期30-34,38,共6页
Failure Analysis and Prevention
关键词
兰姆波检测
冷凝器
不锈钢管
lamb wave testing
condenser
stainless steel tube
