针对传热管胀接区涡流检测的难点，研究了旋转涡流检测工艺，通过对模拟试样、换热管管板试样胀接区的试验确定了合适的涡流检测工艺参数，并结合胀接管的解剖、渗透检测结果对比验证了检测方案的有效性。在应用中对几千余处换热管胀接区进行了检测，经水压试验、泄漏检测验证，换热管胀接区的旋转涡流检测工艺是可靠的。

This paper focuses on the difficulty of eddy current testing of the expansion zone, and studies the rotary eddy current testing process. Suitable technological parameters were determined by testing of sample and heat transfer tube plate. The results of expansion tube anatomy and penetration testing show that the scheme is effective. For the application of the method, thousands of heat tube expansion zone were tested, and the reliability of the rotary vortex current testing process was verified by water pressure testing and leakage testing.