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1概述铁道车辆是完成铁路运输任务的重要运载工具，车辆轮对是保证车辆安全运行的关键部件，超声波探伤是发现车辆轮对车轴危害性疲劳裂纹及缺陷的重要检测手段。根据1995年颁布的铁道车辆轮对超声波探伤工艺规程要求，各车辆检修单位一般采用一个工位四台模似式探伤仪或一台多
1 Overview Railway vehicles are important vehicles to complete the task of railway transport. Vehicle wheelsets are the key components to ensure the safe operation of vehicles. Ultrasonic testing is an important means of detecting the vehicle wheel axle damage fatigue cracks and defects. According to the requirements of the ultrasonic testing procedures for railway wheelsets issued in 1995, each of the vehicle maintenance units generally adopts one station with four analog flaw detectors or more than one