管线钢落锤撕裂试验异常脆性断口分析

Analysis on Abnormal Brittle Fracture of DWTT for Pipeline Steel

通过对高强度、高韧性的厚壁管线钢落锤撕裂试验中出现的异常脆性断口进行分析,阐述了其形成原因,提出了高钢级、厚壁管线钢落锤撕裂试验异常脆性断口的评定方法。

Though the analysis on abnormal brittle fracture occurred in DWTT of large wall-thickness pipeline steel with high strength and toughness,the reason to cause the abnormal brittle fracture is describe and the method to assess abnormal brittle fracture occurred in DWTT of high grades and large wall-thickness pipeline steel is put forward.