Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Fukuda Metal Foil & Powder Co., Ltd.

Akashi Corporation

Minoru Kawasaki

Kazuhiko Mori

Soya Takagi

Tadashi Oshima

Shinji Kato

Takashi Saito

Katsuhiko Ueda

Kouji Tanaka

Hajime Kato

Akio Sato

Kazuyuki Nakanishi

Takao Kobayashi

Natsuki Sugiyama

Hironori Aoyama

Kenji Kidera

Hisao Fukuhara

Hideo Tachikawa

Kazuhito Sakai

Yasuhiro Yamamoto

Koji Yamada

Nobuyuki Shinohara

Shintaro Utsumi

Kensuke Hidaka

Naoyuki Miyara

Yoshinori Ishikawa

Masashi Furukawa

Tomoya Okazaki

Yoshio Shimura

Noboru Takayanagi

Yuichi Minami

Chikatoshi Maeda

Takehisa Fujita

Kohei Yanaka

Shozo Nagai

Sinji Kato

Yasuo Kotetsu

Hiroyuki Murase

Jun Nomasaki

Shin Yoshida

Yoshiji Shoda

Hitoshi Kinoshita

Isaka Kanazawa

Hiromi Nomura

A copper-based alloy which includes Cu, Ni, Si, Fe, and Mg, and at least one selected from the group consisting of Mo, W, and V, and in which a content of Mg is 0.02 mass % or more. The copper-based alloy exhibits wear resistance and improved weldability with respect to a substrate.

Copper-based alloy

A hardfacing alloy satisfies the following condition when the hardfacing alloy as a whole is 100 mass % (also simply referred to as '%,' hereinafter), Ni: 10-25%, Si: 1-3%, Fe: 3-18%, the total of one or more elements of Mo, W, and Nb: 6.5-20%, and the balance: Cu and impurities. In particular, it preferably satisfies Fe+2Mo&#x2265;22.6(%), Mo equivalent/Fe&#x2265;1.17, and Mo equivalent=Mo+0.522W+1.033Nb. In a hardfacing part composed of the hardfacing alloy, coarse hard particles are formed to ensure the wear resistance, and a soft phase present in the hard particles ensures the machinability. This may be understood as a raw material powder for hardfacing treatment and may also be understood as a hardfacing member in which a hardfacing part is formed on a base material using the raw material powder.

Hardfacing alloy and hardfacing member

A manufacturing method of a cylinder block () includes: a step of forming a slit () to flow refrigerant therein, between adjacent cylinder bores (CB) among a plurality of cylinder bores provided in a cylinder portion (); a step of placing a first cover () in the slit and welding the first cover to the cylinder portion by laser beam welding; and a step of placing a second cover () on the first cover and joining the second cover to the cylinder portion by friction stir welding.

Cylinder block and manufacturing method thereof

A cladding method for a valve seat in a cylinder head blank includes a combustion chamber, an intake port or an exhaust port communicating with the combustion chamber, and an annular countersunk groove formed in an opening end of the port on the combustion chamber side, the method being for forming a cladding layer by irradiating metal powder supplied in the countersunk groove with a laser beam. A gas flow regulating wall is provided, which projects from the countersunk groove to an inner side of the countersunk groove and to the combustion chamber side, gas is sprayed during irradiating with the laser beam, and the gas is flown by the gas flow regulating wall from the inner side to an outer side of the countersunk groove.

Cladding method for valve seat and production method for cylinder head

A wear-resistant copper-based alloy includes: at least one selected from the group made of molybdenum, tungsten, and vanadium and niobium carbide; chromium in an amount of less than 1.0% in terms of wt %; and a matrix and hard particles dispersed in the matrix, in which the hard particles include niobium carbide and at least one selected from the group made of Nb&#x2014;C&#x2014;Mo, Nb&#x2014;C&#x2014;W, and Nb&#x2014;C&#x2014;V around the niobium carbide.

Wear-resistant copper-based alloy, cladding alloy, cladding layer, and valve system member and sliding member for internal combustion engine

A cylinder block () includes an inter-bore flow passage () between adjacent bores (). Each inter-bore flow passage () is formed by closing an opening-side groove portion () continuous from a cylinder block deck face and a bottom-side groove portion () with the use of a lid member () made of copper, and the lid member (is laser-welded to a groove wall face of the opening-side groove portion (). Before the laser-welding, the lid member () has recesses () that are interspersed in a direction, in which a laser beam travels, at any one of connected portions at which the lid member (is connected to the groove wall face of the opening-side groove portion ().

Laser welding method and engine cooling structure

There is provided a method for manufacturing a cast iron member in which the production of gas defects such as blowholes or pinholes in a clad layer formed on the surface of a cast iron material can be reduced, and the generation of bead cracks in the clad layer can be restrained. In the method for manufacturing a cast iron member, including a step of forming the clad layer by melting a material for cladding by means of irradiation of a laser emitted from a laser irradiation device and by depositing the melted material on the surface of a part of the cast iron material, the step of forming the clad layer is performed by using a material the main ingredient of which is a copper element as the material for cladding so that when the clad layer is formed, a hardened layer having a thickness of 0.01 to 2.0 mm is formed on the surface of the cast iron material.

Method for manufacturing cast iron member

While securing the building-up ability and crack resistance, to provide a build-up wear-resistant copper alloy and valve seat. The build-up wear-resistant copper alloy and valve seat are characterized by having a composition of nickel: 5.0-24.5%, iron: 3.0-20.0%, silicon: 0.5-5.0%, boron: 0.05-0.5%, chromium: 0.3-5.0%, one member or two members or more selected from the group consisting of molybdenum, tungsten and vanadium: 3.0-20.0%, by weight %, and the balance being copper and inevitable impurities.

Build-up wear-resistant copper alloy and valve seat

This is to provide a build-up wear-resistant copper-based alloy, which is advantageous for enhancing the cracking resistance and machinability, which is appropriate for cases of building up to form built-up layers especially, and which is equipped with the wear resistance, cracking resistance and machinability combinedly in a well balanced manner. A build-up wear-resistant copper-based alloy is characterized in that it has a composition, which includes nickel: 5.0-20.0%; silicon: 0.5-5.0%; manganese: 3.0-30.0%; and an element, which combines with manganese to form a Laves phase and additionally to form silicide: 3.0-30.0%; by weight %, and inevitable impurities; and additionally the balance being copper. The element can be one member or two or more members of titanium, hafnium, zirconium, vanadium, niobium and tantalum.

Build-up wear-resistant copper-based alloy

This aims to provide a wear-resistant copper-based alloy, which is advantages in not only enhancing wear resistance in a high temperature range but also enhancing crack resistance and machinability and which is especially suitable for forming a cladding layer. The wear-resistant copper-based alloy comprises, by weight, 4.7 to 22.0% nickel, 0.5 to 5.0% silicon, 2.7 to 22.0% iron, 1.0 to 15.0% chromium, 0.01 to 2.00% cobalt, 2.7 to 22.0% one or more of tantalum, titanium, zirconium and hafnium, and the balance of copper with inevitable impurities.

Wear-resistant copper-based alloy

A process of cladding by welding includes the steps of: (1) preparing a workpiece having a cladding-scheduled portion including an exposed normal region, the exposed normal region having a normal surface including a possibility that a foreign substance portion exists, and the foreign substance portion to form a defect of cladding; (2) irradiating the exposed region of the cladding-scheduled portion of the workpiece with an high-density energy beam, the high-density energy beam capable of eliminating or decreasing the foreign substance portion, substantially without melting the exposed normal region of the cladding-scheduled portion; and (3) covering the exposed normal region of the cladding-scheduled portion of the workpiece with a clad layer.

Process of cladding by welding

A wear-resistant copper-based alloy includes 10.0 to 30.0% by weight Ni, 2.0 to 15.0% by weight Fe, 2.0 to 15.0% by weight Co, 0.5 to 5.0% by weight Si, 1.0 to 10.0% by weight Cr, 2.0 to 15.0% by weight at least one first optional element selected from the group consisting of Mo, Ti, Zr, Nb and V, at least one second optional element selected from the group consisting of C and O, and the balance of Cu and inevitable impurities. A carbon content 'X' and an oxygen content 'Y' satisfy the following relationships; namely: 0.ltoreq.'X'.ltoreq.0.5, 0.ltoreq.'Y'.ltoreq.0.05, and 'Y'.gtoreq.(-0.8)('X')+0.04. The wear-resistant copper-based alloy enables to improve the toughness of weld bead, and to inhibit weld bead from cracking effectively in the solidifying process of a building-up operation.

Method and apparatus for bidirectionally oscillating a spot of a laser beam incident upon a workpiece to be processed with the laser beam, wherein the laser beam generated by a laser source is reflected by a movable reflecting mirror which is bidirectionally pivoted about a first axis by an oscillating actuator, so that the reflected laser beam is incident upon the workpiece. The apparatus includes a rotary support member which supports the mirror and the oscillating actuator and which is rotatable about a second axis perpendicular to the first axis, and a rotating actuator for rotating the rotary support member about the second axis during bidirectional oscillation of the spot of the laser beam incident upon the workpiece, to thereby change an oscillating direction of the beam spot.

Method and system for processing workpiece with laser seam, with

In forming a weld bead of pure copper on a ferroalloy base material by laying a powder of copper and melting the powder by a high density energy source such as laser beams, TIG arc or electron beams, the powder of copper is beforehand mixed with a powder of an auxiliary metal having a higher melting point than pure copper. In order to ensure the substantial purity in copper of the weld bead, the powder mixture should not include more than 16 wt % nickel.

Method of forming weld bead of pure copper on ferroalloy base material

A wear-resistant copper-base alloy having superior self-lubricity includes, by weight %,

Wear-resistant copper-base alloy

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Toyota, Japan

Minoru Kawasaki