统计一些工厂的不合格焊接试板情况,其中有80~90%是冷弯不合格造成的。有的厂不得不改用其他钢材,造成不必要的浪费。因此,对冷弯不合格情况进行分析讨论,找出其原因,以解决这些问题是很有必要的。本厂在采用A3钢材料制造压力容器的过程中,采用埋弧自动焊的焊接方法。产品试板的冷弯试样经常出现不合格现象。这也是许多压力容器制造厂普遍关心的一个问题。为此,我们对不合格的试样进行了分析讨论。 Statistics of some factories unqualified welding test board conditions, of which 80 to 90% is caused by cold bend unqualified. Some factories have to switch to other steel, resulting in unnecessary waste. Therefore, it is necessary to analyze and discuss the unqualified conditions of cold rolling to find out the reasons to solve these problems. The factory in the process of using A3 steel materials to manufacture pressure vessels, submerged arc welding using automatic welding methods. Cold bending test specimens often appear unqualified products. This is also a common concern of many pressure vessel manufacturers. To this end, we have failed to analyze the sample.