This study reports the welded joint of a novel 590 MPa V-N microalloyed wheel steel on microstructure and mechanical properties after flash butt welding. The welding parameters were current 48°/582.0 A, upsetting 44°/516.6 workpiece clearance 1.5 mm. evolution in occurred as follows: seam (ferrite side plate + acicular ferrite +martensite)→coarse-grained zone (acicular granular bainite)→fine-gr...

The application bottleneck of laser welding is being gradually highlighted due to a high prevalence porosity. Although technology has been well applied in fields such as vehicle body manufacturing, the suppression weld porosity stainless steel containers pharmaceutical industry still challenging. bottom was investigated by applying ultrasonic vibration, changing positions and optimizing shieldi...