本发明公开了一种避免大壁厚高韧性X80 钢管DWTT 异常断口的DWTT 试样及其方法,包括长方体结构的试样,试样的顶部中心处设置有沟槽,沟槽内设置有焊珠,焊珠上设置有线切割加工缺口。能够消除大壁厚高韧性X80 钢管出现DWTT 异常断口。
The invention discloses a DWTT sample and a method for avoiding the abnormal fracture of DWTT of large wall thickness and high toughness X80 steel pipe, including a sample of rectangular structure, a groove is arranged at the top center of the sample, a welding bead is arranged in the groove, and a wired cutting notch is arranged on the welding bead. It can eliminate the abnormal DWTT fracture of large wall thickness and high toughness X80 steel pipe.