Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Sumitomo (sei) Steel Wire Corp.

Tokyo Tungsten Co., Ltd.

Takashi Yoshioka

Makoto Setoyama

Satoru Kukino

Tetsuo Nakai

Mitsuhiro Goto

Teruyuki Murai

Nozomu Kawabe

Mitsunori Kobayashi

Hisanori Ohara

Hiromu Izumida

Kazuo Yamagata

Motoyuki Tanaka

Shinei Takamura

Akira Doi

Takehiko Hayashi

Toshio Shimizu

Akira Nakayama

Yoshihiko Touda

Yasuhisa Hashimoto

Sadamu Matsumoto

Shigehiko Takaoka

Toshiro Hirohata

Takashi Takagaki

Kouji Kiyosu

Yasuji Ohgaki

A lightweight insulated electric wire and an automobile wire harness using the same insulated electric wire where the insulated electric wire has a conductor portion including one or more first wires and one or more second wires, which are stranded together. The first wires are constituted by metal wires made from at least one type of metal selected from copper, copper alloy, aluminum and aluminum alloy. The second wires are constituted by metal wires different from the first wires and have a relative permeability of 4.0 or less.

Covered wire and automobile-use wire harness

A curable composition applied to the surface of a tendon for prestressed concrete contains at least an epoxy resin and a moisture-curing type curing agent. In the curable composition, the tensioning-permitting time L at 90&deg; C. is at least 20 hours, and the number of days M required to cure at normal temperature is at most 1095 days. The curable composition for tendons for prestressed concrete according to the present invention permits complete prevention of corrosion without conducting injection of a grout into a sheath and can be used even when the curable composition is heated to a high temperature by heat generated upon hardening of concrete.

Curable composition for tendon for prestressed concrete and tendon

A high-toughness, quenched, oil-tempered wire for springs which is less likely to suffer a permanent set and is high in strength and toughness. The wire is made of a steel containing predetermined amounts of C, Si, Mn, Al and Ti, to which are selectively added predetermined amounts of V, Mo, W and Nb. After quenching and tempering, the content of retained austenite is 1-5 vol. %, and/or the number of carbides having a diameter of 0.05 .mu.m or more is 5 or less per .mu.m.sup.2 as viewed on a transmission electron microscope image.

Oil-tempered wire and method of manufacturing the same

Super hard composite material for tools, comprising a substrate of CBN sintered body containing more than 20% by volume of cubic boron nitride (CBN), improved in strength of base material, wear-resistance, hardness at high temperatures and acid-resistance usable in cutting work of steels which are difficult to be machined. The substrate (2) has a laminated film (1) consisting of super thin films (a) and (b) each deposited alternatively on the substrate (2), the super thin film (a) being made of nitride and/or carbide of at least one element selected from a group comprising IVa group elements, Va group elements, VIa group elements, Al and B and possessing a crystal structure of cubic system and metallic bond property, the super thin film (b) being made of at least one compound possessing a crystal structure other than cubic system and covalent bond property under equilibrium condition at ambient temperature and pressure, each unit layer of the super thin films (a) and (b) having a thickness of 0.2 nm to 20 nm, and the laminated film (1) on the whole possessing a crystal structure of cubic system.

Super hard composite material for tools

Hard composite material for tools, comprising a substrate of CBN sintered body containing more than 20% by volume of cubic boron nitride or diamond sintered body containing more than 40% by volume of diamond. The substrate has at least one layer of hard heat-resisting film consisting mainly of Ti, Al and at least one element selected from a group comprising C, N and O on a portion or portions of said substrate where cutting participate. Improved in strength of base material, wear-resistance and oxidation-resistance, less reactive with iron and showing longer tool life comparing to known cutting tools and usable in wider applications such as hardened steel, cast ion and simultaneous cutting of cast ion and aluminum alloy.

Hard composite material for tools

Ultrafine particle-layered film for coating cutting tools. The film has more than two layers of at least two compounds consisting mainly of carbide, nitride, carbonitride or oxide of at least one element selected from a group consisting of IVa group elements, Va group elements, VIa group elements, Al, Si and B, and that each layer is made of ultrafine particles. Ultrafine particle-layered film improves hardness, strength, wear-resistance and heat-resistance of the tools.

Layered film made of ultrafine particles and a hard composite material

A long-life, inexpensive rotary anode for use in an X-ray tube having an X-ray generating layer formed by CVD on a graphite substrate and capable of producing high-power X-rays without the possibility of thermal cracks or delamination. When forming the X-ray generating layer of a tungsten-rhenium alloy on the graphite substrate through a rhenium intermediate layer by CVD, material gases are supplied intermittently so that the entire part or only the surface area of the X-ray generating layer will be formed of laminated structure of ultra-thin films each 0.1-5.0 microns thick. The content of rhenium in the tungsten-rhenium alloy forming the X-ray generating layer has a gradient form, i.e. increases from the interface with the rhenium intermediate layer toward the surface, so that the total amount of rhenium added can be reduced.

Rotary anode for x-ray tube

A coating film which can sufficiently improve the wear resistance of a cutting tool or a wear-resistant tool and which reveals excellent qualities as a wear-resistant or protective film for an electric or electronic part or a sliding or machine part. Such a coating film is in the form of an ultra-thin film laminate comprising at least one nitride or carbonitride of at least one element selected from the group consisting of the elements in the groups IVa, Va and VIa in the periodic table and Al and B and having a cubic crystal structure and having mainly metallic bonding properties, and at least one compound having a crystal structure other than the cubic crystal structure at normal temperature and normal pressure and under equilibrium state and having mainly covalent bonding properties, the at least one nitride or carbonitride and the compound being alternately laminated in the form of layers, each layer of the compound having a thickness of 0.2-50 nm, the laminate having a cubic crystalline X-ray diffraction pattern as a whole.

Ultra-thin film laminate

The present invention relates to a die for use in forming optical lenses made of glass or synthetic resin used in OA instruments, VTR, cameras and the like. In order to lengthen the useful life of the die by suppressing the oxidation or deterioration of the die surface due to temperature and atmosphere and reaction of materials of which lenses are made, when lenses are formed, the die is coated with a single-layer or multi-layer thin film of Si.sub.3 N.sub.4 or SiC or compounds thereof, which are superior in wear and corrosion resistance at high temperatures, by the vapor coating method.

Die for use in forming lens

Growing community of inventors

Itami, Japan

Takashi Yoshioka