Hitachi Metals, Ltd.

Hitachi Cable, Inc.

Honda Motor Co., Ltd.

Toru Sumi

Seigi Aoyama

Hiromitsu Kuroda

Hideyuki Sagawa

Shohei Hata

Takashi Hayasaka

Keisuke Fujito

Kazuya Nishi

Hideaki Takehara

Hiroshi Okikawa

Kenichi Egami

Michiaki Shimizu

Masayoshi Goto

Takeshi Usami

Kazuyuki Watanabe

Takahiro Sato

Detian Huang

Shinji Ito

Taichi Oka

Kenji Nakajima

Hidenori Abe

Tsukasa Iwasita

Koichi A Ono

Manabu Yazaki

Nobuyuki Yamashita

Ryohei Okada

Kazuhiko Tomita

Hiroshi Bando

Tamotsu Sakurai

Kazuhisa Takahashi

Shuji Sakai

Minoru Takatsuto

Takayuki Tuji

Satoshi Yajima

Tosiyuki Horikoshi

Takahiko Hanada

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 &#x3bc;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.

Copper alloy wire, cable, and method of manufacturing copper alloy wire

A wire rod made of an aluminum alloy. The aluminum alloy includes Al crystal grains, an Al&#x2014;Zr compound, and an Al&#x2014;Co&#x2014;Fe or Al&#x2014;Ni&#x2014;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 &#x3bc;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 &#x3bc;m or less.

Aluminum alloy wire rod and producing method therefor

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.

Alloying-element additive and method of manufacturing copper alloy

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&#x2014;Co&#x2014;Fe compound and an Al&#x2014;Zr compound. The Al crystal grains having a crystal grain diameter of 10 &#x3bc;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.

Aluminum alloy wire rod and producing method thereof

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.

Method for manufacturing a conductive wire

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.

Aluminum alloy conductor, insulated wire including the conductor, and method for manufacturing the insulated wire

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 &#x3bc;m in a surface layer up to a depth of 50 &#x3bc;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.

Soft-dilute-copper-alloy material, soft-dilute-copper-alloy wire, soft-dilute-copper-alloy sheet, soft-dilute-copper-alloy stranded wire, and cable, coaxial cable and composite cable using same

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.

Copper-based material and method for producing the same

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, TiO, TiS or Ti&#x2014;O&#x2014;S, and an other part of the sulfur and the titanium forms a solid solution. TiO, TiO, TiS and Ti&#x2014;O&#x2014;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.

Dilute copper alloy material, dilute copper alloy wire, dilute copper alloy twisted wire and cable using the same, coaxial cable and composite cable, and method of manufacturing dilute copper alloy material and dilute copper alloy wire

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&#xb0; C. and not more than 1320&#xb0; 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.

Dilute copper alloy material and method of manufacturing dilute copper alloy member excellent in characteristics of resistance to hydrogen embrittlement

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 &#x3bc;m or less in a surface layer having a depth of 50 &#x3bc;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.

Soft dilute-copper alloy wire, soft dilute-copper alloy twisted wire, and insulated wire, coaxial cable, and composite cable using these

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.

High-speed transmission cable conductor, and producing method thereof, and high-speed transmission cable

Provided is an electricity collection and distribution ring excellent in durability and the easiness of manufacturing while the size thereof is reduced, and also provided is a method for manufacturing the electricity collection and distribution ring. The electricity collection and distribution ring () comprises: first to fourth bus rings (to) for collecting electricity from and distributing electricity to each of the phase coils () of a three-phase motor (); a plurality of fixing members () disposed at a plurality of predetermined positions in a circumferential direction of the first to fourth bus rings (to) and mutually fixing the first to fourth bus rings (to); and a plurality of connection terminals () for connecting the first to fourth bus rings (to) and the lead-out lines of the respective phase coils (). The fixing members () integrally have a locking portion () for, among the first to fourth bus rings (to), locking the first bus ring () positioned at an end in an axis direction and a fixing portion () for mutually fixing the other second to fourth bus rings (to) by molding.

Electricity collection and distribution ring and method for manufacturing same

An audio/video cable includes an insulated layer including a copper conductor for transmitting audio/video signals and an insulation layer formed on a periphery thereof. The copper conductor includes a soft dilute copper alloy material containing pure copper, Ti as an additive element and an inevitable impurity as a balance. The soft dilute copper alloy material includes a recrystallized structure having a grain size distribution such that crystal grains in a surface layer are smaller than internal crystal grains. The soft dilute copper alloy material includes not less than 2 and not more than 12 mass ppm of sulfur, more than 2 mass ppm but not more than 30 mass ppm of oxygen, and not less than 4 and not more than 55 mass ppm of Ti.

Audio/Video cable

A weldment includes metal materials that are welded to each other. At least one of the metal materials 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, Fe, Si, Al, Ca, V, Ni, Mn, Ti and Cr. A method of manufacturing a weldment includes melting a dilute copper alloy material by SCR continuous casting and rolling at a molten copper temperature of not less than 1100&#xb0; C. and not more than 1320&#xb0; C. to make a molten metal, forming a cast bar from the molten metal, forming a dilute copper alloy member by hot-rolling the cast bar, and welding the dilute copper alloy member to a metal material. The dilute copper alloy material includes the pure copper, more than 2 mass ppm of oxygen, and the additive element,?

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Hitachi, Japan

Toru Sumi