Method for producing wide strip alloy c64750 for automotive connectors by horizontal continuous casting

By optimizing casting parameters through a pull-stop-retard process and a zoned water cooling device, the problem of limited width of C64750 alloy billets was solved, enabling efficient and low-cost production of wide billets and ensuring billet quality and production stability.

CN122446003APending Publication Date: 2026-07-24CHINALCO DAYE COPPER PLATE & STRIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINALCO DAYE COPPER PLATE & STRIP CO LTD
Filing Date
2026-04-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In the existing technology, when producing C64750 alloy billets by horizontal continuous casting, the width is limited to 300-500mm, resulting in low production efficiency, high cost, and difficulty in ensuring the internal quality of the billet.

Method used

A pull-stop-retard process and a zoned water-cooling device were used, combined with optimized alloy composition and casting parameters, to prepare wide-width (600-700mm) C64750 alloy billets, including alloy melting, heat holding and horizontal continuous casting, while controlling the temperature field and cooling uniformity.

Benefits of technology

It effectively expands the range of billet sizes, increases single-batch output and processing efficiency, reduces costs, ensures uniform internal structure and surface quality of billets, and is suitable for large-scale industrial production.

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Abstract

The application discloses a preparation method of a wide-width alloy C64750 horizontal continuous casting for automobile connectors and belongs to the technical field of metallurgy. The method comprises the following steps: preparing raw materials according to specific components, alloy components are as follows according to percentage by weight: Cu >= 97%, Sn 0.28-0.35%, Ni 1.7-2.0%, Si 0.25-0.32%, Fe <= 0.1%, P <= 0.1%, and the rest is impurities; after smelting and component control, the horizontal continuous casting is carried out by adopting a pull-stop-retreat process, and a casting blank with a width of 600-700 mm and a thickness of 15-17 mm is obtained. The wide-width horizontal continuous casting of the C64750 alloy is successfully realized by optimizing the alloy components and the horizontal continuous casting process, matching specific casting speed, pulling speed, stop time, reverse pushing speed and partition cooling water cooling devices, the problems of low production efficiency and high cost caused by the limited width (usually 300-500 mm) of the casting blank in the prior art are solved, the obtained wide-width casting blank is uniform in internal quality and good in surface, the subsequent processing flow can be significantly shortened, the material utilization rate is improved, and the wide-width casting blank is suitable for the fields of electronic and electrical appliances, automobiles, aerospace and marine ships.
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