Angular distortion
Angular distortion is a geometric deviation of parts due to uneven thermal contractions during welding. This leads to deformation and can cause stresses and cracks.
Physical-Chemical Mechanism of Action
During welding, a temperature difference arises between the molten steel and the unmelted parts. This leads to different thermal contractions that spread across the weld. The unequal contractions cause deformation of the parts in the form of angular distortion.
Metallurgical Relevance & Welding Risks
Angular distortion can cause stresses in the steel that can lead to cracks and fracture. It also impairs the mechanical properties of the joint and can cause uneven load distribution. This can be particularly problematic for highly stressed components.
Workshop Practice & Instructions
To minimize angular distortion, it is important to align the weld so that it runs as parallel as possible to the main stress line. Welding should be done in the correct sequence and, if necessary, supported by a stress equalizer. An angular distortion of more than 1 ° should be avoided.