包申格效应是金属材料经过预先加载产生少量塑性变形,而后再同向加载,屈服强度升高;反向加载,屈服强度降低的现象。油气管道螺旋钢管在制造过程中,由于包申格效应的影响,使其屈服强度与卷板的屈服强度有一定差别。经过对输油管制管后的多方测试,有如下浅识。包申格效应不是一个定值,它受到许多因素的影响。 (1)管道钢的强度水平; (2)形变量; Bauschinger effect is the metal material after preloading a small amount of plastic deformation, and then loaded with the same direction, yield strength increased; reverse loading, yield strength decreased phenomenon. During the manufacturing process, due to the influence of Bauschinger effect, the yield strength of oil and gas pipe spiral pipe is different from the yield strength of coil. After a multi-party test on the pipeline after the following shallow knowledge. Bauschinger effect is not a fixed value, it is affected by many factors. (1) the strength of pipe steel; (2) the amount of deformation;