Aluminum "cold roll" weld defect
Aluminum "cold roll" weld defect
(OP)
I've heard the term "cold roll" used to describe an aluminum fillet weld defect. It seems to be where the toe of the fillet is not concave but exhibits a profile more perpendicular to the material being joined. Does this sound familiar, is there a better description out there? We are using pulsed push-pull MIG traveling on a geared track welding 0.063 5052-H32 to 0.20 6061-T6 using 0.035 and 0.125 4043 straight Argon in a well fixtured shop environment. We do about 720 feet per day per fixture, this appears to be a common issue. Not sure how to avoid it, looking for guidance on if it is a rejectable defect and what the consequences are of leaving it there ( it has been suggested that the 0,063 base metal will fracture at the toe of the weld where cold-roll exists ). Thanks!





RE: Aluminum "cold roll" weld defect
RE: Aluminum "cold roll" weld defect
Based on the description you provided of your fillet weld joint, specifically that you have a large mismatch in thickness of the two parts (.063" and .200"), it seems a bit odd that you are having an overlap condition at the fillet toe of the thinner part but not at the fillet toe of the thicker part. Can you provide a sketch of the weld joint?
RE: Aluminum "cold roll" weld defect
RE: Aluminum "cold roll" weld defect
RE: Aluminum "cold roll" weld defect
RE: Aluminum "cold roll" weld defect
RE: Aluminum "cold roll" weld defect
http://www.kobelco.co.jp/english/welding/events/fi...
RE: Aluminum "cold roll" weld defect
Aluminum oxide melts at a much higher temperature than the base metal. It isn't a cure-all, but it cannot hurt.
Best regards - Al
RE: Aluminum "cold roll" weld defect
RE: Aluminum "cold roll" weld defect
Best regards - Al