How to weld > Welding thermal cycle
The outcome of the thermal cycle
The characteristics of the thermal heat treatment from welding are of crucial importance for the mechanical properties and the microstructures in the HAZ.
Its outcome depends primarily on:
- The level of the heat input
- The plate thickness in the joint
- The type of joint
- The preheat temperature, if applicable.
As an example, the thermal cycles during a welding performance, at different locations in the joint, are illustrated below.
The heating and cooling rate and the peak temperature decrease with increased distance to the arc.
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