Beryllium copper alloy for elastic diaphragm having excellent fatigue property and method for manufacturing the same

By optimizing the chemical composition and process of beryllium copper alloy, adding Ta element and controlling the content of Co and Ni, and combining Nb, Ti, and V microalloying and Fe and Mg grain boundary regulation, a beryllium copper alloy strip with high strength, high elasticity and long fatigue life was prepared. This solved the problem of the difficulty in balancing elasticity and fatigue resistance in beryllium copper alloys in the existing technology, and met the manufacturing requirements of high-end switching devices.

CN122147130APending Publication Date: 2026-06-05GUIZHOU ZHENHUA HUALIAN ELECTRONICS
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU ZHENHUA HUALIAN ELECTRONICS
Filing Date
2026-03-18
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies struggle to significantly improve elasticity and fatigue life while maintaining the high strength and good conductivity of beryllium copper alloys, thus failing to meet the high reliability and long life requirements of high-end switching devices for elastic diaphragms.

Method used

By optimizing the chemical composition of beryllium copper alloy, adding a high content of Ta element and controlling the content of Co and Ni, and combining Nb, Ti, and V microalloying elements with Fe and Mg grain boundary regulating elements, beryllium copper alloy strips with a thickness of 0.5 mm to 2.0 mm are prepared by using a process of segmented melting, homogenization treatment, hot rolling, annealing, cold rolling and aging treatment, ensuring that the alloy has high strength, excellent elasticity and long fatigue life.

Benefits of technology

The yield strength of beryllium copper alloy strip is ≥1100MPa, tensile strength is ≥1350MPa, elongation is ≥3%, and fatigue life is ≥400,000 cycles, meeting the manufacturing requirements of elastic diaphragms for high-end switching devices.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122147130A_ABST
    Figure CN122147130A_ABST
Patent Text Reader

Abstract

The application discloses a beryllium copper alloy with excellent fatigue performance for elastic diaphragm and a preparation method thereof, and belongs to the technical field of electronic component manufacturing. Alloy components are as follows in terms of percentage by weight: Be 2.00%-2.40%, Co 0.20%-0.40%, Ni 1.00%-1.40%, Ta 0.20%-0.30%, Mg 0.10%-0.20%, Fe 0.05%-0.10%, Nb 0.20%-0.40%, Ti 0.30%-0.50%, V 0.20%-0.30%, Pb≤0.005%, Sn≤0.005%, total impurities≤0.01%, and the balance being Cu. Co+Ni≥1.5% in the alloy, and 4≤(Nb+Ti+V) / (Fe+Mg)≤5. The preparation method adopts a sectional melting process, Be, Mg and Ti burning loss is reduced through secondary feeding, and then homogenization treatment, hot rolling, annealing, solid solution, twice cold rolling and intermediate annealing, two-stage aging treatment are carried out to obtain a strip with an average grain size of 6-8 microns and a thickness of 0.5-2.0 mm. The obtained product has a yield strength of≥1100 MPa, a tensile strength of≥1350 MPa, an elongation of≥3%, and a fatigue life of≥400000 times, and the elasticity and fatigue resistance are simultaneously improved.
Need to check novelty before this filing date? Find Prior Art