Heat Treatment (PWHT)
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NDT-Inspect started the discussion Why heat treat weld? in the forum Heat Treatment a year ago
Post-weld heat treatment (PWHT) is a process in which a component or structure is heated to a specific temperature and then cooled at a controlled rate. This process is often used in the welding of high-strength steels and other materials, and has several benefits including:
- Reducing residual stresses: Welding can cause residual stresses to form…
NDT-Inspect posted an update in the group
Heat Treatment (PWHT) a year agoPWHT, or post-weld heat treatment, is a process used to reduce the residual stresses and improve the toughness of welded joints in metals. PWHT is typically performed by heating the welded joint to a specific temperature for a specified time, and then allowing it to cool slowly. This can help to relieve the residual stresses that are present…
NDT-Inspect posted an update in the group
Heat Treatment (PWHT) 3 years agoWhen welding stabilised steels (e.g. Types 321 and 347) at heat treatment temperatures of 550 to 750 degrees Celsius for more than an hour, knife attacks occur at the limit. In short, if you apply the PWHT method to a workpiece at a temperature of 600 degrees F (316 degrees C), the local PWHT carbon in low-alloy steels performs the lowest… Read more
