摘要
介绍了螺旋缝焊管预精焊法生产中预焊技术的特点、预焊焊接设备与工艺。采用两台DC1000A进口电源、Ar+CO2+O2三元混合气体配比器、英国某公司开发的激光跟踪系统和机械科学研究院哈尔滨焊接研究所研制的陶瓷复合喷嘴可自身旋转清渣的大电流MAG空冷焊枪,结合大电流高速MAG焊接工艺进行预焊,对预焊后的试样进行焊缝成型和金相组织分析,并对精焊后试样的焊缝和热影响区进行冲击性能分析,得到了预期的结果,实现了螺旋缝焊管预焊焊接设备的国产化。
The tack-welding characteristics, equipments and technologies in the two-stage SAWH pipe production are introduced. The welding equipments include two sets of DC1000A power source imported from the United States, an Ar＋CO2＋Oztri-mixed gas proportioner, a laser tracking system developed by a British company and a large current MAG air-cooling torch developed by Harbin Welding Institute （HWI）, with a ceramic composite nozzle which can be cleaned by itself through nozzle rotating. The experiments of pipe welding production are carried out with the equipments motioned above and combined with the high-speed and large current MAG welding technologies developed by HWI. After the tack-welding process, the weld shaping and microstructure of the samples are analyzed, and the impact properties of the welding line and the heat affected zone of the submerged-arc final welding samples are also analyzed. Through the experiments above, the expected results are obtained and the most important result is that the localization of the spiral pipe tack-welding equipments is realized.
出处
《钢管》
CAS
2011年第6期39-42,共4页
Steel Pipe
关键词
螺旋缝焊管
预焊
焊枪
焊缝
国产化
SAWH pipe
Tack-welding
Welding torch
Welding line
Localization
