纤维素根焊特殊根部未熔合缺陷的控制

Control of special root incomplete fusion flaw produced by fibrin root welding

在进行一次纤维素根焊的工艺评定试验的过程中,对取样进行刻槽锤断实验时,发现采用纤维素打底焊容易产生一种特殊的根部未熔合缺陷。通过分析试样的取样部位和刻槽锤断试样断口的特点,发现产生缺陷的原因是焊接工艺参数选择不合理;焊工未能很好地掌握纤维素焊条与其他低氢型焊条相区别的特性,运条不合理或操作手法不熟练。根据缺陷产生的原因,找出了解决这种特殊的根部未熔合缺陷产生的方法,提高了纤维素根焊的焊接质量。

When doing a grooving and hammer breaking experiment on a sample in the technology assess test of fibrin root welding, find that fibrin backing weld will easily produce a special root incomplete fusion tlaw.By analyzing the part and fracture characteristic of sample, find the reason for this flaw is the choice of welding technology parameter is illogical;Welders don＇t grasp well the fibrin electrode＇s characteristics which distinguish with other low hydrogen electrodes, and usage isn＇t reasonable or operation isn＇t skilled. According to the reasons of the flaw,find out the solutions and improve the welding quality of fibrin root welding.