Aluminium-steel welding electrical transition joint include cathode welding blocks and anode welding blocks, which are conductive transition devices in the production process of electrolytic cells in electrolytic aluminum plants. The aluminum-steel welding block serves as an aluminum-steel transition joint (transition plate) in the electrolytic cell, tightly combining the aluminum busbar and the steel rod to play a transitional role. In addition, since the welding interface is a metallurgical bond between atoms, compared with the mechanical performance connection, its interface resistance is so small that it can be ignored, which not only saves energy consumption, but also extends the service life.
The anode welding block is used at the connection between the anode guide rod and the steel claw. The steel plate of the welding block and the steel claw are welded with steel-steel. The aluminum plate and the aluminum guide rod are welded by argon arc, forming the anode guide rod group. The steel claws are cast from phosphorus pig iron and anode carbon blocks to form an anode carbon block group, which is fixed on the anode busbar with a spiral clamp. It will be periodically used in aluminum electrolysis production.
The cathode welding block is mainly used to connect the cathode soft strip and the steel rod in the electrolysis workshop. Anode and cathode welding blocks are special joints obtained by high-energy welding using special energy. Due to the instantaneous and local characteristics of high energy rate, under the correct technical conditions, steel and aluminum will undergo unique plastic deformation at the interface between steel and aluminum to present a corrugated and solid metallurgical bond. The inherent properties of steel and aluminum won’t be changed even in the welded joint area.