新型焊条电弧焊水下局部干法焊接装置研制及焊接工艺研究

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新型焊条电弧焊水下局部干法焊接装置研制及焊接工艺研究
Development of a new device in locally drying underwater SMAW and welding process research
2019年49卷第1期页码：115-119
纸质出版：2019
DOI：
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朱征宇, 张强勇, 陈勇, 等. 新型焊条电弧焊水下局部干法焊接装置研制及焊接工艺研究[J]. 电焊机, 2019,49(1):115-119. DOI：

ZHU Zhengyu, ZHANG Qiangyong, CHEN Yong, et al. Development of a new device in locally drying underwater SMAW and welding process research[J]. Eletric Welding Machine2019, 49(1): 115-119. DOI：

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。

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.

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