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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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。
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.
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.
引文
[1]程方杰,胡生辉,高文斌,等.水下焊条电弧焊扩散氢含量及焊缝组织特征分析[J].焊接学报,2014,35(9):45-48.
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[5]王国荣,易耀勇,刘世明,等.水下局部干法药皮焊条焊接的研究[J].华南理工大学学报(自然科学版),1995,23(2):34-40.
[2]朱加雷,焦向东,蒋力培,等.水下焊接技术的研究与应用现状[J].焊接技术,2009,38(8):4-7.
[3]李连波,曹军,许威,等. 4种水下焊条焊接工艺性研究[J].焊接技术,2014(9):24-27.
[4]石永华,王国荣.水下药芯焊丝焊接的工艺特点与研究进展[J].焊接技术,2000,29(2):38-40.
[5]王国荣,易耀勇,刘世明,等.水下局部干法药皮焊条焊接的研究[J].华南理工大学学报(自然科学版),1995,23(2):34-40.