Welds of Fe3Al-type alloy with hardened structure

Tungsten inert gas welding (TIGW) of Fe3Al-type alloy sheets includes heat treatment resulting in the nucleation of carbide particles. Mechanical tests (tensile experiments, creep at high temperatures and hardness tests at room temperature) proved that (Fe,Cr) carbide precipitates harden the welded material to the level of the unwelded material.