What is the time interval called that occurs from current shutoff to shielding gas and/or cooling water shutoff?

The time interval that occurs from current shutoff to the shutdown of shielding gas and/or cooling water is known as postflow time. This period is crucial in the Gas Tungsten Arc Welding process because it allows for the continued flow of shielding gas to protect the weld from atmospheric contamination immediately after the welding arc has been extinguished. Additionally, if applicable, it enables cooling water to keep the torch nozzle cool, preventing damage to the equipment. By maintaining postflow for a predetermined duration, it ensures the integrity of the welded joint and prolongs the life of the welding torch. This practice enhances the overall quality of the weld and reduces the risk of oxidation and other defects.

In contrast, preflow time refers to the period before the welding arc starts, where shielding gas is already flowing to establish a protective atmosphere. Flow delay time is not a standard term in this context, and cutoff time typically refers to a point where the power is completely shut off rather than a specific interval between events. These distinctions underline the importance of postflow time in ensuring effective welding operation and outcomes.