Rolling method for producing copper clad aluminum row

Abstract

The invention discloses a rolling method for producing a copper clad aluminum row, which comprises the following steps: 1, selecting a copper pipe with uniform wall thickness and an 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 into the copper pipe to form a composite blank, and plugging two ends of the composite blank tightly; 3, heating the composite blank to between 300 and 540 DEG C, preserving the heat for 30 to 60 minutes, then thermally rolling the composite blank for 1 to 3 times, and coldly rolling the composite blank for 1 to 4 times; 4, straightening and acid-washing a rolled product; 5, carrying out diffusion treatment 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 treated product to form a final product. The rolling 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 current, especially for multi-phase power supply connection. Background technique [0002] At present, copper-clad aluminum bar is a new type of bimetallic composite material, which is economical, environmentally friendly, and saves copper resources. It is an ideal material to replace the existing copper bar. The application prospect is very broad. The current annual market demand is about 10-12 About 10,000 tons, as my country gradually becomes the world's electronics, consumer goods and electrical product manufacturing center, the domestic market demand for copper-clad aluminum strips 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 process technology and has good mechanical and electrical propertie...

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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