weld nugget failure
False weld (cold weld)
Cold weld (false weld) means no proper weld nugget formed during the resistance welding process. It is one of the most common weldability problems in the automotive industry in multi-sheet spot welding with dissimilar materials. Increasing false welds can harm the safety of the cars drastically or the production line must stop and rerun. 2 … Continue readingThe critical role of hold time in weld quality and performance
Optimizing hold time shapes cooling rates, hardness distribution, and fracture behavior in resistance spot welds. This case study explores the effect of hold time on hardness and strength of weld nugget.