Gas tungsten arc process optimization and assessment for robotized position welding of austenitic stainless steel edge joints
Karhu, Miikka; Kujanpää, Veli (2021-11-13)
Post-print / Final draft
CIRP Journal of Manufacturing Science and Technology
School of Energy Systems
In this work the aim was to find suitable welding parameters, as pulse parameters, welding speed and shielding gas composition and study their effects on weld joint penetration and weld quality in different welding positions. In addition, the inaccuracy in the alignment of the arc and its effects was tested in different cases. It was found that it was possible to find the optimal parameters in different positions, flat (PA), overhead (PE), and vertical-up position (PF). However, the vertical-down position (PG) was giving a lower joint penetration in the cases which allow sound welds. Therefore, it was considered that the fabrication of the circumferential joint was best done in two steps to avoid the PG position, which ensures that a sound weld with the set 2.6 mm penetration requirement is achieved over the entire circumference. The use of a shielding gas mixture containing argon and 2% hydrogen showed significant advantages over the other three shielding gas compositions tested, which was observed as deeper penetration of the welds.
Karhu, M., Kujanpää, V. (2021). Gas tungsten arc process optimization and assessment for robotized position welding of austenitic stainless steel edge joints. CIRP Journal of Manufacturing Science and Technology, vol. 36, pp. 12-22. DOI: 10.1016/j.cirpj.2021.10.012
- Tieteelliset julkaisut