An Ultrasonic technology Study for Subsurface Defect in Railway Wheel Tread

摘要

The subsurface defect in the wheel tread caused from Rolling Stock Fatigue (RCF) has become more danger in high speed railway. The conventional UT and phased array UT have deficiency to find the subsurface defect from the tread surface because of limitation of ultrasonic near field. In this paper, the subsurface defect is studied by simulation and experimental results with ultrasonic technique. Two typical probes, TR and angle probe are employed and some parameters are optimized. The experiments on real wheel with nature subsurface defect are carried out and the results show that it can compensate for conventional ultrasonic technology to improve the Possibility of detection (POD) in the railway wheel.