Development and Prospects of Copper-clad Steel Wire

1. The application of copper clad steel wire

Copper-clad steel wire relies on the skin effect of low-voltage high-frequency signals.

In the high frequency band, it is transmitted along the surface of the copper-clad steel wire.

Therefore, when the thickness of the copper plating layer reaches a certain value. We can confirm and transmit signals of a certain frequency band.

At a higher frequency, the conductivity of the copper-clad steel wire at this time can be similar to that of a copper wire of equal cross-section.

Therefore, it is widely used in the fields of communication, electronics industry and electric power.

For example:
  1. Pin wires of electronic components
  2. Communication cable center conductor
  3. Stranded ground wire
  4. Shield braided wire and decoration
  5. Electrified railway lines
  6. Wire for anti-corrosion purposes.

We can also use copper-clad steel to make the leads of electronic components. And the pure copper on the surface ensures its solderability and tin plating.

At present, countries all over the world have tried to use it to make the leads of components such as capacitors, diodes, and integrated circuits.

Applied to the distribution line of the coaxial cable (CATV) conductor material, the inner conductor of the subscriber line and the TV cable.

It can replace copper wire and used to make high-precision products and aircraft parts with rounded corners and half-corners.

In the field of transportation, copper-clad steel wire replaces materials such as copper, copper alloy and copper-clad aluminum.

It has a proven track record in trolley wires (streetcar wires), electrode lead wires, grounding rods, cables for electrical equipment, etc.

Around the 1980s, Japan first tried to apply copper-clad steel contact wires to electric trains.

At present, copper-clad steel wires have used on the Shinkansen, which effectively meets the requirements of express trains.

As I have noted, countries that have adopted it to install chained mobile devices in the world include Sweden, Switzerland, Belgium and Germany.

Like longitudinal and transverse aerial cables, trailers, Y-shaped auxiliary cables, directional cables, etc., and have reached standardization.

Nowadays, my country’s electrified railways have officially used copper-clad steel wires.

2.The production process of copper clad steel wire

There are many production methods for copper-clad steel bimetallic composites.

There are four main methods in China.

  1. Coating method
  2. Electroplating method
  3. Horizontal continuous casting hot dip coating method
  4. Hot rolling method

Compared with other methods, the electroplating method is a relatively mature process for the production of copper-clad steel.

It has relatively stable product quality and is a production process method commonly used in the current industry.

It is an electroplating method based on the working principle of an electrolytic battery to “dissolve” a block copper plate and then lead it to cover the steel wire through an electric current.

However, the main disadvantages of copper-clad steel wires made by electroplating are as follows:
Firstly, the copper plating is thinner.
Secondly, mixed impurities in the copper layer.
Thirdly, the performance is relatively brittle.
Fourthly, the electrical conductivity is poor.
The last, the environment pollution is big in the production process.

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