Effect of heat input on weld bead geometry of submerged arc welded ASTM A709 Grade 50 steel joints

Residual stress distributions in laser and gas-metal-arc welded high-strength steel plates

“…The ultra-NGLW specimen, owing to its low heat input, produced the narrowest regions of tensile stress. (5) There are significant benefits associated with choosing a laser-based welding process over GMAW for the welding of S700 steel. These include the fact that the extent of softening in the heat-affected zone is significantly reduced through using a laser-based process.…”

Submerged Arc Welding a Review Paper

“…However, they find the various types microstructures such as, acicular ferrite, coarse granular ferrite, and fine polygonal ferrite, and also find that welding thermal cycle and its unique feature.  Few researchers also work on the assessment of heat affected zone (HAZ) of SAW and process through digital image [3,4,27,28] This process of arc welding provides a pure and cleaner high volume Weldment  Some researchers work on chemical and structural characteristics of the crystalline phase in agglomerated flux for submerged arc welding [1,2,27,28]. While comprise the initial composition of flux and weight percentage of component it seems that the oxide increased at the same proportion as they were present in the original mixture.…”

Influence of process variables on weld bead quality in two wire tandem submerged arc welding of HSLA steel

“…Although the compound influence of the welding conditions in two-wire SAW-T process on the weld bead quality has been reported in recent literature (Farhat, 2007;Moeinifar et al, 2011;Pilipenko, 2001;Shen et al, 2012;Viano et al, 2000), a details quantitative effects of the individual process parameters on weld dimensions and mechanical properties are currently not available. The novelty of the present work is the detailed quantitative investigation of the effects of the key welding variables on the final weld bead quality in typical two-wire DC-AC SAW-T, which is critical for the successful application of the tandem welding process.…”

“…Moeinifar et al (2011) simulated typical four-wire SAW process of X80 microalloyed steel using a Gleeble apparatus and observed that the hardness in the coarse grained heat affected zone increased with the cooling rate. Shen et al (2012) reported that weld and HAZ dimensions would increase with the rate of heat input in SAW and SAW-T of 20 mm thick ASTM A709 Grade 50 steel. In typical tandem pulsed gas metal arc welding process, Ueyama et al (2005) highlighted the need to optimize the electrode inclination angles in the direction of welding to avoid undercut and humped weld profiles especially at higher welding currents.…”