Conditions for achieving high-quality welds in the plasma-arc keyhole welding of structural steels

✍ Scribed by Jukka Martikainen

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 467 KB
• Volume: 52
• Category: Article
• ISSN: 0924-0136
• DOI: 10.1016/0924-0136(94)01444-6

✦ Synopsis

The present investigation describes the possibilities and the technological conditions for welding structural steels, especially high-strength steels, reproducibly and with high quality. The investigation comprises butt welding with an l-groove in the flat, horizontal vertical and vertical positions, and root welding of thick plates in the flat position. The investigation presents the welding-parameter combinations which results in the best quality welds.

It has been shown that mechanized plasma keyhole welding is a very useful method for structural steels. It can compete successfully with common MIG/MAG and SAW welding as well as with electron and laser-beam welding, especially in large applications such as in the welding of large plates, box girders, tanks and pressure vessels, and large diameter pipes.