Welding issues

Liquid metal embrittlement

What is Liquid metal embrittlement(LME)? Liquid metal embrittlement is a phenomenon where certain metals like Al and steels undergo brittle failure when stressed in contact with liquid metals like Zn, Sn, Pb, etc. One of the challenges in the welding industry is cracking due to LME observed on spot welds of Zn-coated High Strength Steel. … Continue reading

Electrode degradation

Electrode degradation is one of the common problems in the welding industry. It decreases the nugget size due to reduced current density at the weld interface and reduced conductivity of the electrode tip. 1. Mechanisms of electrode degradation High current and pressure are key characteristics in the resistance welding process. Though they are necessary to … Continue reading