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铁路车轮运行使用中，其残余应力会从压应力向拉应力转变，这是一种会造成车轮故障的潜在危险。最近美国铁路的法规才要求对双色进行检测，查出可产生不安全应力的过热迹象。用超声波进行定量测量是一种极有吸引力的检测法。应力会引起声速的微小变化。对10个铸钢车轮进行超声波测量的一系列情况作了介绍。其中两个车轮是新制的，其余的则经感应加热以产生与运行车轮相似的应力。用两种不同的超声波检测仪进行测量，并对测量结果作了比较。超声波测量与简单的破坏性检查结果相符，为检测及维修推荐一种极有用的方法。
In the course of railway wheel running, the residual stress will change from compressive stress to tensile stress, which is a potential danger of wheel failure. The recent U.S. railroad regulations required two-color testing to detect signs of overheating that could produce unsafe stress. Quantitative measurement with ultrasound is an attractive test. Stress can cause small changes in sound velocity. A series of cases of ultrasonic measurement of 10 cast steel wheels were introduced. Two of the wheels are new, and the rest are induction heated to produce similar stresses to running wheels. The measurements were made with two different ultrasonic detectors and the results were compared. Ultrasound measurements are consistent with simple destructive inspection results and recommend a highly useful method for inspection and repair.