Abstract:
A steel wire according to an aspect of the present invention includes a predetermined chemical composition, in which a wire diameter R of the steel wire is 1.0 mm to 3.5 mm, a soft portion is formed along an outer circumference of the steel wire, the Vickers hardness of the soft portion is lower than that of a position of the steel wire at a depth of 1/4 of the wire diameter R by Hv 30 or higher, the thickness of the soft portion is 5 µm to 0.1 xR mm, the metallographic structure of a center portion of the steel wire contains 95% to 100% of pearlite by area%, the average lamellar spacing of pearlite in a portion from a surface of the steel wire to a depth of 5 µm is less than that of pearlite at the center of the steel wire, the difference between the average lamellar spacing of pearlite in the portion from the surface of the steel wire to the depth of 5 µm and the average lamellar spacing of pearlite at the center of the steel wire is 3 nm to 60 nm, and the tensile strength is 1100 MPa or higher.
Abstract:
Provided are a high-strength fiber composite and an applied product thereof, whereby it is possible for the inherent tensile strength of high-strength fiber yarns to be obtained, even when used in applications in which bending stress occurs, such as wires, or when stored while wound around a drum or the like. This high-strength fiver composite has a core produced by imparting twist to a high-strength fiver bundle produced by bundling high-strength fiber yarns, and a stiffening the twisted high-strength fiber bundle with a stiffening agent. In this high-strength fiber composite, the high-strength fiber yarns are resistant to breakage even when flexed, have a superior shearing strength, and can maintain the inherent tensile strength of high-strength fibers, even when used in applications in which bending stress occurs, such as wires, or when stored while wound onto a drum or the like. The strand structure, which has a strand construction composed of two or more of the high-strength fiber composites twisted together, maintains the inherent strength of the high-strength fibers, and affords more consistent tensile strength, as compared with when an equal number of high-strength fiber composites lacking the strand construction are used.
Abstract:
Provided are a rubber article reinforcing steel wire that is superior in bending fatigue properties to the related art and has a flat cross-sectional shape, and a rubber article using the wire. In a rubber article reinforcing steel wire 10, a major diameter and a minor diameter are substantially perpendicular to each other. Assuming that the major diameter is W, the minor diameter is T, a straight line that passes through a center of the major diameter in a width direction and is parallel to a minor diameter direction is L1, a straight line that passes through a center of the minor diameter in a width direction and is parallel to a major diameter direction is L2, an intersection point of the L1 and the L2 is a center point C, a region within a half of a distance from the center point C to a surface is a central region Rc, and a region outside the central region Rc is a surface layer region Rs, a Vickers hardness Hvc of the central region Rc is more than a Vickers hardness Hvs of the surface layer region Rs; and assuming that a Vickers hardness on the L1 in the surface layer region Rs is Hv1, and a Vickers hardness on the L2 in the surface layer region Rs is Hv2, relationships represented by Hvc - Hv1 ≤ 150, Hvc - Hv2 ≤ 150, Hv1/Hvc × 100 ≥ 85.11, and Hv2/Hvc × 100 ≥ 79.84 are satisfied.
Abstract:
The invention relates to an abrasion resistant fabric containing ultra high molecular weight polyethylene (UHMWPE) filaments, thermotropic liquid crystal polymers (LCP) and natural filaments, the use thereof as protective means and to a protective cover containing said fabric. In particular, the invention relates to a rope and to a roundsling containing the protective cover.
Abstract:
Provided are a rubber article reinforcing steel wire that is superior in bending fatigue properties to the related art and has a flat cross-sectional shape, and a rubber article using the wire. In a rubber article reinforcing steel wire 10, a major diameter and a minor diameter are substantially perpendicular to each other. Assuming that the major diameter is W, the minor diameter is T, a straight line that passes through a center of the major diameter in a width direction and is parallel to a minor diameter direction is L1, a straight line that passes through a center of the minor diameter in a width direction and is parallel to a major diameter direction is L2, an intersection point of the L1 and the L2 is a center point C, a region within a half of a distance from the center point C to a surface is a central region Rc, and a region outside the central region Rc is a surface layer region Rs, a Vickers hardness Hvc of the central region Rc is more than a Vickers hardness Hvs of the surface layer region Rs; and assuming that a Vickers hardness on the L1 in the surface layer region Rs is Hv1, and a Vickers hardness on the L2 in the surface layer region Rs is Hv2, relationships represented by Hvc - Hv1 ‰¤ 150, Hvc - Hv2 ‰¤ 150, Hv1/Hvc × 100 ‰¥ 85.11, and Hv2/Hvc × 100 ‰¥ 79.84 are satisfied.