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Effect of Shielding-Gas Nitrogen Content on the Properties of TIG and A-TIG Orbital-Welded Tubular Joints Made of Duplex Steel

Agnieszka Kiszka, Artur Czupryński, Ewelina Baszczyńska

The article discusses tests results concerning the joining of duplex steel pipes performed using the TIG and A-TIG (with the addition of activating flux) orbital welding technology. The shielding gas used in related tests contained pure argon as well as argon with an addition of nitrogen. Technological welding tests were performed using a closed head without the feeding of a filler metal. The research work included visual and penetrant tests as well as macro and microscopic observations and ferrite meter-aided measurements of the ferrite content in welds.

doi: 10.17729/ebis.2018.2/4

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