= Post weld heat treatment
{wiki=Post_weld_heat_treatment}
Post Weld Heat Treatment (PWHT) is a process used in welding and metal fabrication to improve the mechanical properties of welded joints. It involves heating a welded assembly to a specific temperature and then allowing it to cool under controlled conditions. The primary purposes of PWHT include: 1. **Relieving Residual Stresses**: Welding can introduce internal stresses in the material due to thermal expansion and contraction. PWHT helps to reduce these residual stresses, which can lead to improved fatigue resistance and durability.
Back to article page
