Features of Manufacturing a Two-layer Electrical Contact

It has been shown that metal contact joints must be resistant to electrochemical and electro galvanic corrosion, mechanical damage and wear resistance. However, such requirements are practically not feasible for contact pairs of dissimilar metals. This leads to melting, oxidation, under-burning of the contacts, and in general, a decrease in the reliability of the contact connection. The use of double-layer electrical contacts increases the reliability of power transmission through the connections and increases the service life of the assembly. At the same time, copper consumption was reduced by 60-80% and the contact cost by 20-40%. It has shown that the production of a two-layer contact is associated with plastic deformation of the two layers. In this case, the less strong metal begins to deform first, involving the more durable metal into the deformation zone. Due to the non-coincident yield strengths of metals, additional stresses arise between the layers, which contribute to the alignment of the deformation over the layers.