Copper alloy wire, copper alloy twisted wire, coated electric wire, and electric wire having terminal

Copper alloy wires with controlled additive ratios and cross-sectional design address breakage issues during drawing, achieving superior mechanical properties and productivity by preventing additive element concentration in the core.

WO2026126393A1 Publication Date: 2026-06-18SUMITOMO ELECTRIC INDUSTRIES LTD +2
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
SUMITOMO ELECTRIC INDUSTRIES LTD
Filing Date
2024-12-11
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Cast copper alloy wires with segregated additive elements at grain boundaries or uneven distribution of compounds are prone to breakage during wire drawing, leading to inferior mechanical properties.

⚗Method used

Copper alloy wires with controlled additive element ratios, specifically 0.05% to 1.60% iron, 0.01% to 0.70% phosphorus, and 0.05% to 0.70% tin, and a cross-section design with a central part and outer part, ensuring a tin content ratio of 2.0 or less, are manufactured through controlled casting and drawing processes to prevent brittleness and enhance mechanical properties.

🎯Benefits of technology

The resulting copper alloy wires exhibit excellent tensile strength and reduced breakage during manufacturing, with improved productivity and enhanced mechanical properties throughout their length.

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Abstract

Provided is a copper alloy wire having: a composition comprising a copper alloy containing 0.05-1.60 mass % of iron, 0.01-0.70 mass % of phosphorus, and 0.05-0.70 mass % of tin; a wire diameter of 0.1-15.0 mm; and a cross section that has a central part and an outer peripheral part, wherein the component ratio of the content ratio of the tin in the central part to the content ratio of the tin in the outer peripheral part is 2.0 or less.
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