Upset Weld Study for Joining 304L Stainless Steel Tubes

摘要

Tube samples made from bar and forgings were joined using resistance upset welding technique. Effects of joint design, base metal strength, and weld schedule on metal flow and final microstructure were determined. Studies of the effects of joint design on weld quality permitted selection of an optimum design. Welds joining tubes of four strengths showed that weld centerline hardness is independent of initial material hardness and is greater than that of fusion welds. A wide range of welding parameters was shown to produce satisfactory welds. Bar stock was used for additional studies. These studies determined force and current ranges, improved weld quality, and demonstrated welding in air. (ERA citation 09:028767)