Copper-clad aluminum vertical continuous casting compound forming process

CN122033197APending Publication Date: 2026-05-15CHONGQING SANHANG ADVANCED MATERIALS RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING SANHANG ADVANCED MATERIALS RES INST CO LTD
Filing Date
2026-03-13
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Existing copper-clad aluminum composite material preparation processes suffer from problems such as easy retention of air and impurities at the interface, low bonding strength, large equipment investment, high energy consumption, difficulty in producing large cross-section blanks, and insufficient interface reaction.

Method used

The vertical continuous casting process is adopted, which uses gravity-assisted molten metal flow, a dual-crucible independent melting temperature control and casting system design, a vertical composite crystallizer and a staged cooling system, combined with copper tube preforming and synchronous core filling technology to achieve high-quality metallurgical bonding of copper and aluminum interfaces.

Benefits of technology

It improves the uniformity of the copper layer and the interfacial bonding strength, reduces production costs, and enhances production efficiency and product performance stability, making it suitable for continuous production of large-section composite materials.

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Abstract

The invention discloses a copper-clad aluminum vertical continuous casting composite forming process, and belongs to the technical field of metal layered composite material preparation. According to the technology, a vertical composite crystallizer system is adopted, and continuous preparation of the copper-clad aluminum composite blank is achieved by combining a double-furnace-body and double-pouring system, gravity-assisted step-by-step compounding, graded gradient cooling, an online temperature measurement feedback system and a stable traction system. The method comprises the steps of molten copper and aluminum smelting and purifying treatment, copper pipe preforming and vertical continuous casting composite forming, and by regulating and controlling the temperature of molten copper to be 1250-1320 DEG C, the temperature of molten aluminum to be 740-780 DEG C, the throwing speed to be 60-180 mm / min and parameters of a cooling system, the interface bonding strength of the prepared copper-clad aluminum composite blank is larger than or equal to 125 MPa, the electric conductivity is larger than or equal to 90% IACS, the eccentricity of a copper layer is smaller than or equal to 0.1, and the thickness of the copper layer is smaller than or equal to 10 mm. The problems of weak copper-aluminum interface bonding force, air holes in the interface and the like in the current production process are solved.
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