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对Ｘ５２输送管材料的冲击转变特性与断口分离现象进行了研究。分析了分离裂纹随试验温度的变化规律及其与冲击功的相关性。通过微观分析，讨论了分离产生的机制及引起韧性变化的原因
The impact transformation of X52 pipe material and the phenomenon of fracture separation were studied. The variation law of separation crack with test temperature and its correlation with impact energy were analyzed. Through the microscopic analysis, the mechanism of the separation and the reason of the change of toughness are discussed