← Glossary

Supercooled melt volume

Undercooled molten volume is the state where liquid steel is held below its solidification temperature. This is necessary for crystallization.

Physico-chemical mechanism of action

Undercooled weld pool forms when liquid steel is held below its solidification temperature after welding. This prevents immediate crystallization and allows controlled solidification.

Metallurgical relevance & risks in welding

If the weld pool is not sufficiently undercooled, incomplete solidification can occur. This increases the risk of cracks and reduces the mechanical properties of the weld.

Workshop practice & instructions

To undercool the weld pool, the weld should be cooled in a cooler environment (e.g., water bath) after welding. The temperature should be controlled so that it remains within the critical temperature window to ensure optimal solidification.

MetallurgieSchweißtechnik

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