High-frequency induction annealing device and technology for regulation and control of copper-clad aluminum composite flat bus

Abstract

The invention discloses a high-frequency induction annealing device and technology for regulation and control of a copper-clad aluminum composite flat bus. The high-frequency induction annealing device mainly comprises a guide roller, a driving device, a ceramic tube, temperature measuring device, an induction heating device, and an air blast cooling device. The high-frequency induction annealing device is characterized in that an induction heating power supply adopts high-frequency induction heating to improve the heating rate, shorten the heating time and control the interface layer thickness; an induction heating coil is designed to be flat similar to the cross-sectional shape of the copper-clad aluminum flat bus, so that in induction heating, the temperature distribution at different parts of the copper-clad aluminum flat bus is uniform, the heating time can be shortened, and the interface layer thickness is controlled; as the ceramic tube with a certain length is arranged, the temperature is uniform in heating, and the copper cladding layer and the aluminum core can be recrystallized synchronously; the annealed flat bus temperature can be quickly reduced to below 150 DEG C through a forced air cooling section, so that the thickness-increasing of the aluminum-copper interface is avoided; the aluminum-copper interface layer thickness is controlled within 2-3 microns.

Description

[0001] technical field [0002] The invention belongs to the field of metal layered composite materials, and relates to a high-frequency induction annealing device and process whose thickness and performance of the interface layer of copper-clad aluminum composite flat row can be adjusted. [0003] Background technique [0004] Copper-clad aluminum flat bar is a bimetallic layered composite material, which has the advantages of low density, low cost, and easy connection. busbar, etc. Copper-clad aluminum conductors or flat bars are generally made through a certain composite technology (see: Dai Yakang, et al. Wire and Cable, 1997, (5): 25-28; Xie Jianxin, et al. A cladding material horizontal continuous casting direct composite Forming equipment and process. Chinese invention patent: ZL200610112817.3.) First prepare copper-clad aluminum composite billet, and then produce products with certain cross-sectional shape and size through subsequent forming processes such as rolli...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to solve the above-mentioned problems existing in the existing conventional isothermal annealing method, and provide a copper-clad aluminum flat row rapid induction annealing method, which uses high-frequency induction heating to perform rapid and continuous induction annealing on the copper-clad aluminum flat row, through rapid Short-term heating can significantly shorten the holding time of the copper-clad aluminum flat bar at high temperature, and effectively suppress the obvious increase in the thickness of the interface layer of the copper-clad aluminum flat bar, so that the annealed copper-clad aluminum flat bar can obtain uniform and fine copper at the same time. Aluminum recrystallization structure, large elongation, small interface thickness and high interface bonding strength effectively solve the problems of softening of flat row after annealing, decrease of interface bonding strength, and decrease of electrical conductivity

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