Keyword: «sub-zero temperatures»

Ensuring the reliability of welded structures in Arctic conditions is a critical issue, as extremely low temperatures intensify heat dissipation during welding. This increases the cooling rate and the risk of forming quenched structures, which reduces resistance to brittle fracture. The article describes a methodology for measuring thermal cycles using thermocouples at sub-zero temperatures and presents the data in the form of a graph. It is shown that in multi-pass welding, the self-heating of the metal reduces the cooling rate of subsequent layers.