1. Clear and dispose
Corrosion, dirt and oxide on the surface of steel plate and copper plate will affect the plate, and cracks, pores and so on May occur. So we have to do advanced cleaning before the connection, and generally we can do pickling and mechanical treatment.
2. Soften treatment
In fact, it is to work hardening and production of the occurrence of residual stress are eliminated, let it restore the original plasticity, so we have to carry out softening processing, generally speaking, according to the requirements of softening we can be divided into isothermal annealing, complete annealing, stress annealing and recrystallization annealing, and so on.
