A copper adulterated aluminum complex flat line and its making method

Abstract

The invention relates to a copper-clad aluminum composite flat wire and a preparation method thereof, relating to bimetal layered composite materials. The copper-clad aluminum composite flat wire is formed by composition of sandwich layer aluminum and clad copper, and the area ratio of the copper clad is 15 percent to 40 percent. The preparation steps are as follows: copper-clad aluminum composite blanks are directly compounded and formed by adoption of horizontal continuous casting; multi-pass groove rolling and / or multi-pass drawing is performed on the copper-clad aluminum blanks as required; the rolling speed of 3 to 60 meters per minute is adopted, and the single-pass relative percent reduction is 20 percent to 40 percent; or the drawing speed of 2 to 30 meters per minute is adopted, and the single-pass section scalage is 10 percent to 25 percent; under the condition of multi-pass processing and that the overall section scalage of the copper-clad aluminum composite materials reaches 75 percent to 95 percent, low-temperature intermediate annealing is performed on the copper-clad aluminum composite materials; the annealing temperature is 200 to 450 DEG C; the annealing time is 0.5 to 2 hours; the blanks after annealing are rolled or drawn further, and the copper-clad aluminum composite flat wire with required section shape and size is prepared. The invention not only can prepare the high performance copper-clad aluminum composite flat wire but also has high production efficiency.

Description

technical field [0001] The invention relates to a bimetal layered composite material and an efficient preparation method thereof, in particular to a copper-clad aluminum composite flat wire and an efficient preparation method thereof. Background technique [0002] Copper-clad aluminum composite flat wire is a new type of bimetal composite special-shaped wire, which has the advantages of good electrical conductivity, low density, low cost and wide application. Copper-clad aluminum composite flat wire has high cost performance and can be widely used in the manufacture of windings for motors, transformers and electrical equipment, and the installation of power distribution equipment. [0003] The processing method of the copper-clad aluminum composite flat wire that has been publicly reported is prepared by rolling the round copper-clad aluminum composite wire prepared by the cladding welding method, and then passing the mold drawing and shaping and then heat treatment [Ge Chen...

AI Technical Summary

Problems solved by technology

The problems in this processing technology are: (1) The copper-clad aluminum round wire billet used for the preparation of flat wires is drawn from copper strips and aluminum rods after cladding and welding, which can easily lead to low processing rate during the drawing process. Partial peeling, reducing yield and conductive efficiency [Hu Jie. Research on hydrostatic extrusion processing technology of copper-clad aluminum composite wire. New technology and new technology, 2001 No. 9: 27-28]; (2) Production of circular copper clad When aluminum composite wire is used, it is necessary to perform complicated pre-treatments such as straightening and cleaning of the copper strip and aluminum core used, which not only increases the environmental burden, but also has low productivity and high production cost; (3) cladding and welding round wire At the same time, the local temperature at the welding seam is high, which is unfavorable to the aluminum core rod at the contact point, and finally leads to uneven performance of the flat wire section