The KLK-WELD procedure uses the high temperature that develops in the reaction caused by the reduction of copper oxide by aluminum. The reaction takes place inside a graphite mould-crucible, into which the pieces to be welded have previously been placed. The metal resulting from the aluminothermic reaction, in molten state, flows over them, melts them and forms a compact homogeneous mass.
The reaction is very fast and therefore the parts to be welded, in the area around the weld spot, reach a temperature that is much lower than that obtained using standard procedures. This is a very important factor when it comes to protecting the cable insulation or physical characteristics of the materials to be welded. Apart from welding copper to copper, KLK-WELD welding can be used to weld steel to copper, etc.
The KLK-WELD connection is a perfect molecular weld and not a mere mechanical contact. The alloy used has a melting point nearly equal to that of copper and generally has a section of about twice that of the conductors to be welded, so that:
Overloads or short circuit currents do not affect the connection and tests have shown that the conductors melt before the weld does.
The conductivity of the connection is at least equal to or greater than that of the conductors that are joined.
There is no possibility of galvanic corrosion, since the conductors are integrated into the connection.
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