Thermal distortion
Thermal distortion is a permanent deformation of metal due to uneven heating and cooling. This affects the dimensional accuracy of the assembly.
Physical-Chemical Mechanism of Action
The thermal expansion and contraction of metals causes uneven strains when they are heated or cooled differently. This can be caused by incomplete cooling or unequal thermal conductivity of the components.
Metallurgical Relevance & Risks in Welding
Thermal distortion can lead to stresses in the components, which can result in cracks or deformation errors in the overall system. This affects the dimensional accuracy and the functional capability of the assembly.
Workshop Practice & Action Instructions
To minimize thermal distortion, it is important to ensure even cooling. This can be achieved by using cooling water or cooling mats. The thermal conductivity of the components should be taken into account, and if necessary, additional cooling measures such as cooling chambers can be used.