利用电磁超声检测火车车轮踏面的表面及近表面缺陷,其目的就是要研制出一种行之有效的方法检测火车解体车轮中表面、近表面存在的缺陷,用以填补现行检测手段在车轮踏面部位的不足,从而保证运行车轮的质量。该课题适应我国高速铁路的发展要求,具有重要的现实意义。 The purpose of using electromagnetic ultrasonic to detect the surface and near-surface defects of the train wheel tread is to develop an effective method to detect the defects on the surface and near surface of the train disintegration wheel to fill the defects of the existing detection means on the wheel tread surface The lack of, so as to ensure the quality of running wheels. The subject to meet the development of China’s high-speed railway requirements, has important practical significance.