Development of a new device in locally drying underwater SMAW and welding process research

ZHU Zhengyu; ZHANG Qiangyong; CHEN Yong; ZHAO Xianrui; LIU Guixiang

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Development of a new device in locally drying underwater SMAW and welding process research
Vol. 49, Issue 1, Pages: 115-119(2019)
DOI：

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ZHU Zhengyu, ZHANG Qiangyong, CHEN Yong, et al. Development of a new device in locally drying underwater SMAW and welding process research. [J]. 49(1):115-119(2019)
DOI：

ZHU Zhengyu, ZHANG Qiangyong, CHEN Yong, et al. Development of a new device in locally drying underwater SMAW and welding process research. [J]. 49(1):115-119(2019) DOI：

摘要

以拓展水下局部干法焊条电弧焊焊接方法为目的,研制出一种新型的水下局部干法焊条电弧焊焊接装置,并进行了系统的焊接工艺试验。通过焊接装置的试验,该系统装置结构简单、操作方便、焊缝成形美观。与焊条电弧焊正常干法环境焊接相比,由于水下焊接时气体对电弧的压缩效应,使得焊缝熔深明显增加,熔宽略微下降;随着水深的增加,排水气体的压力相应增大,焊缝熔深进一步增加,熔宽进一步下降,同时母材与焊缝的过渡更为圆滑,降低了应力集中的程度。

Abstract

To improve the welding quality of the locally drying underwater SMAW,develops a new device in the locally drying underwater SMAW and carry out a lot of systematic technology experiments. By the experiments,we finally get such results:the structure of the device is simple,the welding formation is well. Compared to the drying welding,the penetration improves a lot in the welding and the weld width decreases a little under the water,because of compression of the arc by gas. With the increase of water depth,the gas pressure increases accordingly,the penetration improves and the weld width decreases further. In addition the transition between weld and base metal is more smooth,and this reduced stress concentration.