Title:
STEEL WIRE, MARINE HOSE, AND METHOD FOR EVALUATING BENDING PERFORMANCE OF STEEL WIRE
Document Type and Number:
WIPO Patent Application WO/2024/084732
Kind Code:
A1
Abstract:
Provided are a large-diameter steel wire having excellent bending performance, a marine hose comprising the steel wire, and an evaluation method capable of simply and easily ascertaining the bending performance of the steel wire. A single steel wire 6w having an outer diameter of more than or equal to 5 mm is held by a pair of holders 11 that are longitudinally spaced apart by a prescribed interval L, and a tensile test is conducted. The bending performance of the steel wire 6w is evaluated on the basis of a comparison of the value of the reduction R of area of the steel wire 6w that has ruptured with a pre-set reference value Rx. The prescribed interval L is 30 mm, the tensile rate is 50 mm/min, the temperature is room temperature, and the reduction R of area (%) is a value calculated according to ((S0-S1)/S1)×100, where S0 is the cross-sectional area of the steel wire 6w before the tensile test, and S1 is the cross-sectional area of the fractured surface after the tensile test.
Inventors:
SUEFUJI RYOTARO (JP)
Application Number:
PCT/JP2023/020965
Publication Date:
April 25, 2024
Filing Date:
June 06, 2023
Export Citation:
Assignee:
THE YOKOHAMA RUBBER CO LTD (JP)
International Classes:
D07B1/06; F16L11/08; G01N3/08
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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