Abstract: Recrystallization of an aluminium alloy wire material is suppressed while a heat resistance of the same is improved. In a wire material made of an aluminium alloy, an aluminium alloy wire material is provided, the aluminium alloy containing Zr of 0.2 to 1.0 mass %, Co of 0.1 to 1.0 mass % and remainders that are aluminium and unavoidable impurities, and the aluminium alloy wire material having a tensile strength at a room temperature that is equal to or higher than 170 MPa, an elongation that is equal to or higher than 10%, and a stress at time of tensile deformation at a strain speed of 10?5/sec under a temperature condition of 250° C. that is equal to or higher than 40 MPa.

Abstract: Bendability of a copper alloy wire is improved without decrease in an electrical conductivity of the copper alloy wire made of copper alloy containing zirconium. A cable includes: a two-core stranded wire formed by intertwining two electrical wires made of a conductor and an insulating layer covering the conductor; a filler formed around the two-core stranded wire; and a sheath formed around the filler and the electrical wire. The conductor is a copper alloy wire in which a precipitate containing the zirconium disperses, and has a crystal gain diameter that is equal to or smaller than 1 ?m, an electrical conductivity that is equal to or higher than 87% IACS, and a tensile stress that is equal to or larger than 545 MPa.

Abstract: Recrystallization of an aluminium alloy wire material is suppressed while a heat resistance of the same is improved. In a wire material made of an aluminium alloy, an aluminium alloy wire material is provided, the aluminium alloy containing Zr of 0.2 to 1.0 mass %, Co of 0.1 to 1.0 mass % and remainders that are aluminium and unavoidable impurities, and the aluminium alloy wire material having a tensile strength at a room temperature that is equal to or higher than 170 MPa, an elongation that is equal to or higher than 10%, and a stress at time of tensile deformation at a strain speed of 10?5/sec under a temperature condition of 250° C. that is equal to or higher than 40 MPa.

Abstract: A wire rod made of an aluminum alloy. The aluminum alloy includes Al crystal grains, an Al—Zr compound, and an Al—Co—Fe or Al—Ni—Fe compound. The aluminum alloy includes high-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 15 degrees or more, and low-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 2 degrees or more and less than 15 degrees. An average grain diameter of ones of the Al crystal grains surrounded by the high-angle boundaries is 12 ?m or more. An average grain diameter of the ones of the Al crystal grains surrounded by the high-angle boundaries, ones of the Al crystal grains surrounded by the high-angle boundaries and the low-angle boundaries, and ones of the Al crystal grains surrounded by the low-angle boundaries, is 10 ?m or less.

Abstract: An alloying-element additive for adding an alloy element to a copper melt formed by melting a base material including a copper in manufacturing a copper alloy. The alloying-element additive includes a wire-shaped or plate-shaped core including an alloy element, and an outer layer material including a copper and covering the core. A weight ratio of the copper in the outer layer material and the alloy element in the core is in a range of weight ratio where the alloying-element additive has a liquid phase in a temperature range of not more than a melting point of the copper in a copper-alloy element phase diagram.

Abstract: An aluminum alloy wire rod has a chemical composition consisting of 0.1 to 1.0 mass % of Co, 0.2 to 0.5 mass % of Zr, 0.02 to 0.09 mass % of Fe, 0.02 to 0.09 mass % of Si, 0 to 0.2 mass % of Mg, 0 to 0.10 mass % of Ti, 0 to 0.03 mass % of B, 0 to 1.00 mass % of Cu, 0 to 0.50 mass % of Ag, 0 to 0.50 mass % of Au, 0 to 1.00 mass % of Mn, 0 to 1.00 mass % of Cr, 0 to 0.50 mass % of Hf, 0 to 0.50 mass % of V, 0 to 0.50 mass % of Sc, 0 to 0.50 mass % of Ni, the balance being Al and inevitable impurities, and a metal structure including Al crystal grains, an Al—Co—Fe compound and an Al—Zr compound. The Al crystal grains having a crystal grain diameter of 10 ?m or less have an area ratio of 90% or more. The wire rod has a tensile strength of 150 MPa or more, an electrical conductivity of 55% IACS or more and when heated at 200 deg C. for 10 years, a strength of 90% or more of its initial state strength.

Abstract: A wire rod made of an aluminum alloy. The aluminum alloy includes Al crystal grains, an Al—Zr compound, and an Al—Co—Fe or Al—Ni—Fe compound. The aluminum alloy includes high-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 15 degrees or more, and low-angle tilt crystal grain boundaries, each of which has a difference between crystal orientations in both its sides of 2 degrees or more and less than 15 degrees. An average grain diameter of ones of the Al crystal grains surrounded by the high-angle boundaries is 12 ?m or more. An average grain diameter of the ones of the Al crystal grains surrounded by the high-angle boundaries, ones of the Al crystal grains surrounded by the high-angle boundaries and the low-angle boundaries, and ones of the Al crystal grains surrounded by the low-angle boundaries, is 10 ?m or less.

Abstract: A method for manufacturing a conductive wire includes conducting a continuous casting of a conductive alloy material at a casting rate of not less than 40 mm/min and not more than 200 mm/min to form a conductive wire with a primary diameter, the conductive alloy material containing not more than 1.0 mass % of an added metal element, reducing a diameter of the conductive wire with the primary diameter to form a conductive wire with a secondary diameter, heat treating the conductive wire with the secondary diameter so that tensile strength thereof is reduced to not less than 90% and less than 100% of tensile strength before the heat treating, and reducing a diameter of the conductive wire with the secondary diameter and the reduced tensile strength to generate a logarithmic strain of 7.8 to 12.0 therein to form a conductive wire with a tertiary diameter.

Abstract: A method for manufacturing a conductive wire includes conducting a continuous casting of a conductive alloy material at a casting rate of not less than 40 mm/min and not more than 200 mm/min to form a conductive wire with a primary diameter, the conductive alloy material containing not more than 1.0 mass % of an added metal element, reducing a diameter of the conductive wire with the primary diameter to form a conductive wire with a secondary diameter, heat treating the conductive wire with the secondary diameter so that tensile strength thereof is reduced to not less than 90% and less than 100% of tensile strength before the heat treating, and reducing a diameter of the conductive wire with the secondary diameter and the reduced tensile strength to generate a logarithmic strain of 7.8 to 12.0 therein to form a conductive wire with a tertiary diameter.

Abstract: Bendability of a copper alloy wire is improved without decrease in an electrical conductivity of the copper alloy wire made of copper alloy containing zirconium. A cable includes: a two-core stranded wire formed by intertwining two electrical wires made of a conductor and an insulating layer covering the conductor; a filler formed around the two-core stranded wire; and a sheath formed around the filler and the electrical wire. The conductor is a copper alloy wire in which a precipitate containing the zirconium disperses, and has a crystal gain diameter that is equal to or smaller than 1 ?m, an electrical conductivity that is equal to or higher than 87% IACS, and a tensile stress that is equal to or larger than 545 MPa.

Abstract: An aluminum alloy wire rod has a chemical composition consisting of 0.1 to 1.0 mass % of Co, 0.2 to 0.5 mass % of Zr, 0.02 to 0.09 mass % of Fe, 0.02 to 0.09 mass % of Si, 0 to 0.2 mass % of Mg, 0 to 0.10 mass % of Ti, 0 to 0.03 mass % of B, 0 to 1.00 mass % of Cu, 0 to 0.50 mass % of Ag, 0 to 0.50 mass % of Au, 0 to 1.00 mass % of Mn, 0 to 1.00 mass % of Cr, 0 to 0.50 mass % of Hf, 0 to 0.50 mass % of V, 0 to 0.50 mass % of Sc, 0 to 0.50 mass % of Ni, the balance being Al and inevitable impurities, and a metal structure including Al crystal grains, an Al—Co—Fe compound and an Al-Zr compound. The Al crystal grains having a crystal grain diameter of 10 ?m or less have an area ratio of 90% or more. The wire rod has a tensile strength of 150 MPa or more, an electrical conductivity of 55% IACS or more and when heated at 200 deg C. for 10 years, a strength of 90% or more of its initial state strength.

Abstract: It is an objective of the invention to provide an Al alloy conductor exhibiting mechanical properties and heat resistance that are balanced at a higher level than conventional Al alloy conductors while having an electrical conductivity comparable to that of any conventional Al-based material. There is provided an Al alloy conductor formed of an Al alloy. The Al alloy has a chemical composition including Co of 0.1 mass % or more and 1 mass % or less, at least one of Sc of 0.1 mass % or more and 0.5 mass % or less and Zr of 0.2 mass % or more and 0.5 mass % or less, and the balance made up of Al and inevitable impurities. The Al alloy conductor has a matrix containing fine particles of a compound of at least one of the Sc and the Zr with the Al. The fine particles are dispersedly precipitated in the matrix.

Abstract: It is an objective of the invention to provide an Al alloy conductor exhibiting mechanical properties and heat resistance that are balanced at a higher level than conventional Al alloy conductors while having an electrical conductivity comparable to that of any conventional Al-based material. There is provided an Al alloy conductor formed of an Al alloy. The Al alloy has a chemical composition including Co of 0.1 mass % or more and 1 mass % or less, at least one of Sc of 0.1 mass % or more and 0.5 mass % or less and Zr of 0.2 mass % or more and 0.5 mass % or less, and the balance made up of Al and inevitable impurities. The Al alloy conductor has a matrix containing fine particles of a compound of at least one of the Sc and the Zr with the Al. The fine particles are dispersedly precipitated in the matrix.

Abstract: A soft dilute copper alloy material includes 2 mass ppm to 12 mass ppm of sulfur, more than 2 mass ppm and not more than 30 mass ppm of oxygen, 4 mass ppm to 55 mass ppm of Ti, and a balance including copper. An average crystal grain size is not more than 20 ?m in a surface layer up to a depth of 50 ?m from a surface. The average crystal grain size in the surface layer is less than the average crystal grain size in an inner portion located more interiorly than the surface layer.

Abstract: A method for manufacturing a conductive wire includes conducting a continuous casting of a conductive alloy material at a casting rate of not less than 40 mm/min and not more than 200 mm/min to form a conductive wire with a primary diameter, the conductive alloy material containing not more than 1.0 mass % of an added metal element, reducing a diameter of the conductive wire with the primary diameter to form a conductive wire with a secondary diameter, heat treating the conductive wire with the secondary diameter so that tensile strength thereof is reduced to not less than 90% and less than 100% of tensile strength before the heat treating, and reducing a diameter of the conductive wire with the secondary diameter and the reduced tensile strength to generate a logarithmic strain of 7.8 to 12.0 therein to form a conductive wire with a tertiary diameter.

Abstract: A copper-based material includes a base comprising copper and a surface treatment layer disposed on a surface of the base, the surface treatment layer including an amorphous layer containing a metal element that has a greater affinity for oxygen than for copper, oxygen, and, optionally, copper diffused from the base.

Abstract: A dilute copper alloy material includes, based on a total mass of the dilute copper alloy material, 2 to 12 mass ppm of sulfur, 2 to 30 mass ppm of oxygen, 4 to 55 mass ppm of titanium, and a balance of pure copper and inevitable impurity. A part of the sulfur and the titanium forms a compound or an aggregate of TiO, TiO2, TiS or Ti—O—S, and an other part of the sulfur and the titanium forms a solid solution. TiO, TiO2, TiS and Ti—O—S distributed in a crystal grain of the dilute copper alloy material are not more than 200 nm, not more than 1000 nm, not more than 200 nm and not more than 300 nm, respectively, in particle size thereof, and not less than 90% of particles distributed in a crystal grain of the dilute copper alloy material are 500 nm or less in particle size.

Abstract: A dilute copper alloy material used in an environment with presence of hydrogen includes pure copper including an inevitable impurity, more than 2 mass ppm of oxygen, and an additive element selected from the group consisting of Mg, Zr, Nb, Ca, V, Fe, Al, Si, Ni, Mn, Ti and Cr, the additive element being capable of forming an oxide in combination with the oxygen. A method of manufacturing a dilute copper alloy member excellent in characteristics of resistance to hydrogen embrittlement includes melting the dilute copper alloy material by SCR continuous casting and rolling at a copper melting temperature of not less than 1100° C. and not more than 1320° C. to make molten metal, forming a cast bar from the molten metal, and forming the dilute copper alloy member by hot-rolling the cast bar.

Abstract: Provided are a soft dilute-copper alloy wire and soft dilute-copper alloy twisted wire which have high electrical conductivity and high bending life and can limit disconnection during use compared with oxygen-free copper wire, and also provided are an insulated wire, coaxial cable, and composite cable using the soft dilute-copper alloy wire and soft dilute-copper alloy twisted wire. The soft dilute-copper alloy wire is subjected to annealing treatment by elongation processing of soft dilute-copper alloy material comprising copper and an additive element selected from the group consisting of Ti, Mg, Zr, Nb, Ca, V, Ni, Hf, Fe, Mn and Cr, with inevitable impurities as the balance, wherein the soft dilute-copper alloy wire has an average grain size that is 20 ?m or less in a surface layer having a depth of 50 ?m from the surface, and an elongation value that is at least 1% higher than the average elongation value of oxygen-free copper wire that has been subjected to the aforementioned annealing treatment.

Abstract: A high-speed transmission cable conductor includes a core material includes mainly copper, and a surface treated layer formed around a surface of the core material. The surface treated layer includes an amorphous layer including a metal element having a higher affinity for oxygen than the copper, and oxygen.