Miki Pulley Co., Ltd.

Toshiba Tungaloy Co., Ltd.

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Tungaloy Corporation

Satoshi Kinoshita

Masaki Kobayashi

Kozo Kitamura

Takayuki Satomi

Masaharu Hirosawa

Junpei Kajiyama

Hisao Ogawa

Hiroyuki Miura

Etsuo Nakano

A coupling device configured to transmit a rotational force between a first shaft and a second shaft, the device including a first coupling member mounted on the first shaft, a second coupling member mounted on the second shaft, and an intermediate member disposed between the first coupling member and the second coupling member, and configured to allow misalignment between the first shaft and the second shaft. The second coupling member includes a base member configured to be fixed to the intermediate member by a first fastening device, and a shaft mounting member configured to relatively non-rotatably be mounted on the second shaft, the shaft mounting member having a long hole extending along a circumferential direction of the above-described axis and being configured to detachably be fixed to the base member by a second fastening device inserted through the long hole.

Coupling device and rotational phase adjustment method for coupling device

Power transmission coupling

Shaft coupling

A cemented carbide comprises a binder phase consisting essentially of an iron family metal, a first hard phase consisting essentially of WC having a hexagonal crystal structure, and a second hard phase consisting essentially of one or more types of a compound of a metal or metals of group 4, 5 or 6 of the periodic table having an NaCl-type cubic crystal structure. The cemented carbide is formed by a surface region with a thickness of 2 to 50 &#x3bc;m consisting of the binder phase and the first hard phase, and an inner region present underneath the surface region consisting of the binder phase, the first hard phase and the second hard phase. A ratio of an average grain size of the first hard phase in the surface region to an average grain size of the first hard phase in the inner region is 1 or less, and a ratio of an area of the binder phase in the surface region to an area of the binder phase in the inner region is greater than 1.

Cemented carbide, coated cemented carbide member and production processes of the same

Disclosed are a plate-crystalline tungsten carbide-containing hard alloy which comprises 4 to 40% by volume of a binder phase containing at least one of iron group metals selected from Co, Ni and Fe as a main component; and the balance of a hard phase comprising tungsten carbide alone, or tungsten carbide and 50% by volume or less of a compound with a cubic structure selected from at least one of carbide and nitride of the 4a (Ti, Zr and Hf), 5a (V, Nb and Ta) or 6a (Cr, Mo and W) group element of the periodic table and mutual solid solutions thereof, and inevitable impurities, wherein when peak intensities at a (001) face and a (101) face in X-ray diffraction using K.alpha. rays with Cu being a target are represented by h(001) and h(101), respectively, the tungsten carbide satisfies h(001)/h(101) .gtoreq.0.50, a composition for forming a plate-crystalline tungsten carbide, and a process for preparing the plate-crystalline tungsten carbide-containing hard alloy.

Plate-crystalline tungsten carbide-containing hard alloy, composition

Disclosed are a plate-crystalline tungsten carbide-containing hard alloy which comprises 4 to 40% by volume of a binder phase containing at least one of iron group metals selected from Co, Ni and Fe as a main component; and the balance of a hard phase comprising tungsten carbide alone, or tungsten carbide and 50% by volume or less of a compound with a cubic structure selected from at least one of carbide and nitride of the 4a (Ti, Zr and Hf), 5a (V, Nb and Ta) or 6a (Cr, Mo and W) group element of the periodic table and mutual solid solutions thereof, and inevitable impurities,

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Kawasaki, Japan

Satoshi Kinoshita