Extrusion rolling composite method for producing copper clad aluminum row

Abstract

The invention discloses an extrusion rolling composite method for producing a copper clad aluminum row, which comprises the following steps: 1, selecting a copper pipe with uniform wall thickness andan aluminum bar in transition fit with the inner wall of the copper pipe, and cleaning the copper pipe and the aluminum bar to remove oil stains and oxidation layers; 2, pressing the aluminum bar intothe copper pipe to form a composite blank, heating the composite blank to between 400 and 540 DEGC, preserving the heat for 30 minutes, and then extruding the composite blank to form a copper clad aluminum row semi-finished product through a horizontal extruder; 3, heating the semi-finished product to between 300 and 540 DEG C, preserving the heat for 30 to 60 minutes, and then thermally rollingand coldly rolling the semi-finished product; 4, straightening and acid-washing the semi-finished product; 5, carrying out diffusion treatment for the copper clad aluminum row at the temperature of between 200 and 550 DEG C under the protection of nitrogen of one atmospheric pressure, and preserving the heat for 1 to 3 hours; and 6, drawing the copper clad aluminum row to form a final product. Theextrusion rolling composite method for producing the copper clad aluminum row not only has short process flow and high production efficiency, but also can save limited resources and reduce the cost.

Description

technical field [0001] The invention relates to a production method of a copper-clad aluminum bar. The copper-clad aluminum bar is a kind of metal composite material used for conducting large currents, especially for connecting multi-phase power sources. Background technique [0002] At present, copper-clad aluminum bar is a new type of bimetal composite material, which is economical and applicable, green and environmentally friendly, and saves copper resources. It is an ideal material to replace the existing copper bar. About 10,000 tons, as my country gradually becomes the manufacturing center of electronics, daily consumer goods and electrical products in the world, the demand for copper-clad aluminum bars in the domestic market will continue to grow, and it is expected to reach 150,000 to 200,000 tons within five years . This product is manufactured with unique technology and has good mechanical and electrical properties. It is widely used in the connecting line bar of el...

AI Technical Summary

Problems solved by technology

The problems of the above various processes are: the cleanliness of the billet is very high, the total processing rate from the wire billet to the finished product is low, and multiple annealing is required. Due to the large difference in mechanical properties between copper and aluminum, it is easy to Lead to defects such as local cracking of the interface, fracture of the cladding layer and the core material during the drawing process with a small processing rate, resulting in a decrease in yield and conductivity

However, casting liquid metal is prone to defects such as pores, looseness, uneven composition, coarse grains, and thermal stress.

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