金属磁记忆检测是无损检测领域的一项新技术，不仅可以对钩尾框的失效进行早期诊断，而且可以对钩尾框缺陷进行准确检测。
Metal Magnetic Memory Testing (MMMT) is a new technology in metal non-destructive test (NDT). MMMT is not only used for failure early diagnosis, but also for defective inspection of steel casting.
对造成货物列车分离的原因进行了归纳：解钩装置造成的分离；钩尾框断裂及车钩自动分离。
The essay concludes the causes resulting in separation of freight train, such as separation due to the uncoupling device, rupture of coupler yoke as well as the natural separation of train couplers.
研究了磁记忆技术在车钩钩尾框检测中的实际应用，磁记忆技术能够对钩尾框进行准确检测。
The practical application of MMMT in cast steel coupler inspection is studied and the result shows the technique can be used in inspection of steel casting with high precision.
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