Underfill

Physicochemical mechanism of action

When welding, a new metal is formed from the fused materials. If the reinforcement is too low, not enough material remains to achieve the same surface as the component.

Metallurgical relevance & risks when welding

An underfill can lead to mechanical problems because the weld can easily break under pressure or stress. This can lead to safety risks and malfunctions in the component.

Workshop practice & action instructions

Always check the exact size of the reinforcement before welding. Use a suitable weld metal that has the required diameter and length. If in doubt, consult the component data sheets or contact an experienced welder.