水下焊接技术研究现状和发展趋势

摘要

In this article,it summarized the research status of underwater welding methods at home and abroad,such as chamber type dry,local dry and wet method,mainly introduced the welding principle of wet welding method as well as the development underwater welding electrode and flux cored wire. It also analyzed some problems for underwater welding ,such as alloy element loss in weld metal,high content diffusion hydrogen,too fast welding cooling rate,poor visibility,and high arc pressure and so on,as well as discussed the development trend of underwater welding technology. Finally,it pointed out that systematically research on basic welding theory is an effective way to realize underwater welding technology progress.%概述了舱式干法、局部干法和湿法等水下焊接方法的国内外研究现状，重点介绍了湿法水下焊接方法的焊接原理以及水下焊条和药芯焊丝的研究和开发，并对水下焊接的存在的焊缝金属中合金元素损失、扩散氢含量较高、焊接冷却速度过快、可见度差以及电弧压力过大等问题进行了分析，同时对水下焊接技术的发展趋势进行了探讨。最后指出进行系统化水下焊接基础理论研究是实现水下焊接技术进步的有效途径。