Recovery Annealing

A thermal process for reducing point defects and rearranging dislocations into more energetically favorable configurations without changing grain morphology. Electrical conductivity increases as a result.

You do recovery annealing when you need good electrical conductivity again after welding or cold forming, for example with copper or aluminum. The part is heated below the recrystallization temperature so that lattice defects in the structure can be reduced without the grain structure reforming. The exact temperature and holding time depend on the material, so you have to follow the data sheet. If you skip it, the material stays hard and conducts worse, which you notice in higher contact resistances.

MetallurgieSchweißtechnik