steel wire
A steel wire with optimized chemical composition and DSC characteristics addresses the challenge of high tensile strength and torsional properties, reducing delamination and enhancing vehicle fuel efficiency and safety.
JP7870741B2Active Publication Date: 2026-06-05KOBE STEEL LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KOBE STEEL LTD
- Filing Date
- 2023-03-30
- Publication Date
- 2026-06-05
Smart Images
Figure 0007870741000004 
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Abstract
To provide a steel wire which is suitable for a steel cord and has excellent tensile strength and twisting properties, and enables suppression of occurrence of delamination when the wire is twisted.SOLUTION: A steel wire has a predetermined composition, and DSC curve which is obtained by differential scanning calorimetry and has a first peak having the maximum value falling within the range of 100°C to 200°C and a second peak having the maximum value falling within the range of 300°C the 400°C, and satisfies the following formulas (1) and (2), wherein a diameter is 0.25 mm or more and 0.35 mm or less, and tensile strength is 4100 MPa or more. A≥1.50(J / g)...formula (1) B / A≥1.00...formula (2). Herein, A(J / g) denotes a heat generation amount of the sum total of the first peak, and B(J / g) denotes a heat generation amount of the sum total of the second peak.SELECTED DRAWING: Figure 1
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