Heat Input-Related Melt-Through
Heat input-induced burn-through: Local overheating of the base material due to excessive thermal power, leading to uncontrolled melting through.
Physical-Chemical Mechanism of Action
Penetration caused by heat input occurs when the welding beam or electrode introduces too much energy into a small area of the material. This leads to local overheating and uncontrolled burn-through of the metal.
Metallurgical Relevance & Risks in Welding
This burn-through can cause cracks, distortion, and poor weld quality. It can also increase the risk of hot cracking and damage the workpiece.
Workshop Practice & Action Instructions
To avoid heat-input-related burn-through, make sure the welding machine's energy settings are appropriate. Use a suitable protective shield or damping mask to reduce energy emission. Ensure the workpiece is well supported and no unwanted metal parts are in the beam path.