I wanna know that, is "Annealing" step necessary for ALUMINIUM wire and cable manufacturing?
Do factories usually make this "Annealing" Step for manufacturing their Aluminium wire and cables?
Thanks you all in advance.
Best,
Mohammad
In fact there are various types of Aluminium wires and cables. The main application of Aluminium wire is as the conductor of electricity. The produced wires and cables should be able to pass conductivity levels, besides a minimum strength. The levels are specified by the related standards. The annealing process increases conductivity, while decreases the strength. So it may be necessary to add a supporting core of steel wires to annealed Aluminium strands. Therefore, annealing is a step in production of high conductivity products, not all of the ordinary types of Aluminium conductors.
Thanks Milad
I want to know,
Do Iranian Aluminium wire and cable manufactures have this step (ANNEALING)?
Best,
Mohammad
Process Annealing is necessary for the manufacture of Aluminium wire and cable. Wire drawing is not an hot working process but process annealing will afford stress releaving of the wire and cable. This process will enhance toughness and reduce brittleness.
Thanks but I heard that annealing decrease the strength of the Aluminium wire. Is that right dr.?
So annealing is required during the manufacturing process. Aluminum wire starts continuously cast with quite a large diameter (> 10 cm). Typically it is rolled (sets of 3 rollers) down to a diamater just under 2 cm where it is spooled because it is now travelling at very high velocity. From there it is rolled or drawn down to the final diameter. This process introduces a lot of work hardening and, depending on the final diameter, the process might be stopped and the wire annealed or it would break in the drawing process. That is generally a very bad thing as you end up with a lot of aluminum on the floor and it is time -consuming to thread the drawing stations. I don't know if, in some cases, there is a final partial anneal to improve the electrical properties, but generally it would be left in its drawn form becasue the work hardening gives the wire strength and the electrical properties are not strongly dependent on the amount of work hardening.
Hello
The production of cables is carried out by drawing through nozzles. During the withdrawal process, the material is hardened. This helps to improve the mechanical properties. Anesthesia is required if the plasticity is exhausted and a subsequent draw is required. Quenching is required for Ku because it reduces mechanical properties (hardness, strength, etc.).
Success in research!
Emil Yankov
Yes. Cable wraps made of aluminium are coiled and annealed in final state (soft). However special care must be taken to ensure the undue damage during transportation.
How can the wire producer control the effectivnes of annealing process to get enough soft wire? Are there some limit values of mechanical properties to test after annealing?
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