A copper/aluminum/steel three-layer clad composite wire and its forming method

Abstract

The invention relates to a copper, aluminum and steel three-layer clad composite wire. The copper, aluminum and steel three-layer clad composite wire is composed of a copper clad layer, core layer steel and an aluminum interlayer or aluminum alloy interlayer; the cross section of the copper clad layer is a circular ring; the cross section of the core layer steel is circular or irregular; the area ratio of the copper clad layer ranges from 8% to 25%; and the area ratio of the core layer steel ranges from 20% to 50%. The formation method of the wire includes the following steps that: a cleaned copper clad layer and core-layer steel are arranged in a protective gas, and one end of a casting cavity composed of the copper clad layer and the core-layer steel is sealed through adopting a mechanical mode, and metal aluminum liquid is injected into the casting cavity through adopting a pressure casting mode, so that a three-layer composite rod blank can be obtained; and hydrodynamic lubrication is realized through adopting a pressure casing mode, and rod blank drawing and intermediate annealing treatment are used in combination, so that the composite wire can be obtained.

Description

technical field [0001] The invention relates to a multi-layer clad metal composite wire and a forming method, in particular to a copper / aluminum / steel three-layer clad composite wire and a forming method thereof. Background technique [0002] With the development of science and technology, the requirements for material performance in petroleum, chemical industry, electric power, electronics and other fields are getting higher and higher. It is difficult for single material materials to meet the requirements of actual performance. Materials with different properties are combined to improve their performance. Multi-layer composite materials with comprehensive performance have been paid more and more attention, and it is one of the important research directions in the field of materials in the 21st century. Among metal-clad composite materials, copper-clad aluminum wire, copper-clad steel wire, and aluminum-clad steel wire are the most widely used bimetallic composite wires in ...

AI Technical Summary

Problems solved by technology

Copper-clad aluminum wire and copper-clad steel wire are due to the reasons of strength and density, respectively, when used as overhead cables, the pole distance is too short; while copper-clad steel wire is limited due to weight reduction; and aluminum-clad steel wire is due to aluminum It is easy to oxidize to form non-conductive aluminum oxide, causing circuit breaks