Weld Crater

Physical-chemical mechanism of action

At the end of the weld, the molten material stays in the heat longer and cools faster than the rest of the weld. This leads to rapid, sudden solidification and forms a depression.

Metallurgical relevance & risks in welding

Craters can cause uneven hardness at the end of the weld, affecting the toughness and deformability of the steel. They also increase the risk of cracks and porosity.

Workshop practice & instructions for use

To minimize craters, the weld should be cooled slowly. Use a suitable coolant spray or slow cooling through air flow. Make sure the molten material cools evenly and no rapid temperature differences occur.