The mechanism of delamination of a kind of pipeline steel and its effect on fracture were analyzed from fracture experiments and a fractographic investigation was made at fracture surface.

• 对不同厚度油气输送管线钢进行各种裂纹的断裂试验,对各裂纹的断口进行了分析,探讨了分层机理及其对不同形式裂纹体承载能力的影响。