Main features of aluminum clad steel core aluminum stranded wire


Release time:

2022-11-10

Main features of aluminum clad steel core aluminum stranded wire Aluminum-clad steel core aluminum stranded wire is an overhead conductor composed of aluminum-clad steel wire and hard aluminum wire as a reinforcing core. Compared with ordinary ACSR, ACSR is 5% lighter in weight, 2 ~ 3% higher in current carrying capacity, 1 ~ 2% lower in sag, and 4 ~ 6% lower in power loss,

Main features of aluminum clad steel core aluminum stranded wire

Main features of aluminum clad steel core aluminum stranded wire


Aluminum-clad steel core aluminum stranded wire is an overhead conductor composed of aluminum-clad steel wire and hard aluminum wire as a reinforcing core. Compared with ordinary ACSR, ACSR is 5% lighter in weight, 2 ~ 3% higher in current carrying capacity, 1 ~ 2% lower in sag, and 4 ~ 6% lower in power loss. It has good corrosion resistance, long service life, simple structure, and installation. The advantages of convenient maintenance and large transmission capacity. It is widely used in transmission lines of various voltage levels and transmission lines that need to increase the cross-sectional ratio of aluminum and steel, as well as transmission lines in coastal areas, salt marsh areas and 3. level 4 industrial pollution areas.

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Aluminum-clad steel core aluminum stranded wire is a double metal wire that evenly, continuously and tightly wraps a layer of aluminum outside the round steel wire. The strength of aluminum is relatively low, but it is relatively light. Its density is about 1/3 of the density of copper. Aluminum has a relatively high electrical conductivity, ranking third only to silver and copper. Aluminum has good corrosion resistance: steel has high strength, but low conductivity and corrosion resistance. Therefore, aluminum-clad steel wire is the product of the combination of aluminum and steel, which is a complement of advantages and disadvantages. It has the following characteristics:


(1) The size and performance of aluminum-clad steel wires can be adjusted in a wide range.


(2) Steel and aluminum belong to metallurgical bonding, so the bonding strength is good, which is beneficial to the strength advantage of aluminum-clad steel wire.


(3) Compared with galvanized steel wire, it has better heat resistance, because the melting point of aluminum is higher than that of zinc, and the melting point of steel is higher.


(4) Baotou steel wire has good corrosion resistance. If aluminum-clad steel wire is twisted with aluminum wire or aluminum alloy wire and applied to overhead transmission lines, there is no electrochemical corrosion problem. However, galvanized steel wire has this problem. Therefore, the use of anti-corrosion isolation protection.


(5) The cross section of the wire can be made into a complex shape. For example, aluminum-clad steel contact wire (tram wire) for electrified railways. Its shape is "8". One of the production methods is to use a "consistent" continuous extrusion method for one-time molding.


(6) Aluminized steel wire, like galvanized steel wire, is manufactured by the method before hot-dip plating. This is a reinforced material, not a conductive material. Because the hot-dip galvanizing temperature of aluminized steel wire is higher than that of galvanized steel wire, the strength of aluminized steel wire is lower than that of zinc-passing steel wire, and the requirement of electroplating process is higher, which is easy to cause discontinuous "pinhole" defect. This in turn accelerates corrosion. After the 1960 s, China's relevant units to carry out a number of aluminized steel wire development work. But in fact, industrial production has not yet been realized, so it has not been widely used in our country. In addition, the aluminum-plated steel wire has a strong competitiveness with the aluminum-clad steel wire in the same period, and the aluminum-clad steel wire has obvious advantages in linear performance. In the future, the application of aluminized steel wire in transmission lines will at least not increase.


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