The preparation process of the copper enameled wire basically adopts the solid phase junction, that is, the plastic bond deforms the two metal bond faces to the interatomic space, forming a large number of bond points, and through the diffusion heat treatment, the final form a firm bond of the interface. The industrial preparation methods mainly include forging, extrusion, hydrostatic extrusion, rolling and crimping, and cladding welding, but these methods generally have disadvantages such as poor interface bonding and surface treatment problems.
It has a short process flow and a prepared blank interface. To achieve metallurgical bonding, the advantages of large-section composite blank forming can be realized. The principle of this new process is: filling the core metal while continuously forging the outer metal shell; firstly forming a tubular shell of the outer metal material copper, filling the core metal liquid when the temperature of the shell is lowered to a certain extent, the two metal materials are combined by mutual diffusion or intermediate reaction between the two elements. Implement the composite process. Practice has proved that the process can achieve non-oxidative recombination, overcoming the defects of complex processing of the core material or cladding layer in the overmolding manufacturing process, and the interface quality is not disordered.
At the beginning of the composite continuous casting, the copper liquid is firstly solidified into a copper tube and charged continuously by a traction mechanism. Subsequently, the aluminum liquid is continuously filled into the copper tube through the graphite core tube, and the continuous preparation of the copper-clad aluminum composite material is realized by the primary cooling of the crystallizer and the secondary cooling of the water spray to control the solidification process of the aluminum and the interfacial reaction between the copper and Aluminum Magnet Wire.