Copper clad aluminum wire adopts cladding welding manufacturing technology. The finish rolled copper strip is concentrically coated on the outer surface of aluminum wire. After multi-pass drawing, it is made into wire diameter and mechanical and electrical properties that meet various needs, and a solid atomic metallurgical combination is formed between copper layer and core wire. Its surface is bright, round and free of any defects. In this way, the copper-clad aluminum wire has the characteristics of low density of aluminum and good conductivity of copper. The bimetallic composite conductor used in the inner conductor of coaxial cable not only has high signal transmission characteristics, but also has the advantages of light weight or high strength and low production cost. Compared with the traditional pure copper conductor, the use of copper-clad aluminum can save a lot of copper resources, improve the signal transmission performance, reduce the production cost of cable and facilitate the construction of cable users. Copper clad aluminum wire can be widely used in cable TV signal transmission, high-capacity communication network signal transmission, audio signal cable, control signal cable, RF cable, light vehicle cable, welding cable, emergency mobile cable, TV excitation coil, deflection coil, ballast coil, etc.
Since the 1960s, copper-clad aluminum wire has been used as the standard material for the inner conductor of CATV coaxial cable. At present, copper clad aluminum wire is widely used in various fields of the national economy in China. It has been recognized as an updated product of conductor materials in cables by the authoritative institutions of the Ministry of information industry and the State Administration of radio, film and television, which replaces pure copper wires, saves a lot of copper resources, and will promote the technical upgrading of cable products in China.
Advantages of copper clad aluminum bimetallic conductor
1. Excellent conductivity: the conductivity of copper-clad aluminum wire with volume ratio of 10% is the same as that of pure copper wire at high frequency above 5MHz; Its DC conductivity is 65.0% IACS.
2. Light weight: the density of copper clad aluminum wire is only 37 ~ 40% of that of pure copper wire, and its length is 2.5 ~ 2.7 times that of pure copper wire with the same weight.
3. Firm intermetallic bonding: permanent interatomic metallurgical bonding is achieved between two different metal materials, and the coated copper layer is evenly distributed.
4. Good ductility and machinability: it is more plastic than pure copper wire and can be drawn and annealed as single metal wire; It can also be further processed into copper-clad aluminum enamelled wire, electromagnetic wire, silver plated and tin plated copper-clad aluminum wire.
5. Economical and practical, green and environmental protection: save copper, effectively reduce the production cost of cables, and no electroplating pollution.
