Mitsubishi Heavy Industries Limited

Hitachi Metals, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

National Institute for Materials Science

Hidetaka Oguma

Ikuo Okada

Yoshitaka Uemura

Masaki Taneike

Kazutaka Mori

Taiji Torigoe

Koji Takahashi

Sachio Shimohata

Takeshi Kaneko

Keizo Tsukagoshi

Masahiko Onda

Ryota Okimoto

Takeshi Seto

Kei Ohsawa

Soji Kasumi

Daisuke Yoshida

Masahiro Yamada

Hiroshi Harada

Tadashi Fukuda

Shunsuke Torii

Toshiharu Kobayashi

Junichiro Masada

Ichiro Nagano

Yutaka Koizumi

Kosuke Fujiwara

Takanori Matsui

Tadaharu Yokokawa

Kouji Takahashi

Kyoko Kawagishi

Yoshiyuki Inoue

Masato Shida

Toshio Sakon

Kenichi Yaguchi

Masato Itoh

Masao Sakamoto

Michinari Yuyama

Takeshi Naito

Tomoaki Yunomura

In a casting device, positions of discharge ends discharging cooling gas, of respective gas supply nozzles are adjusted in response to movement of a mold. This makes it possible to stably achieve high cooling performance for the mold by blowing of the cooling gas. To adjust the positions of the respective discharge ends, the gas supply nozzles are advanced or retreated, or are expanded or contracted. Further, a cooling chamber may include a radiation cooling portion that cools the mold by radiation, and the radiation cooling portion is disposed below the gas supply nozzles that are provided directly below a heat shielding body partitioning a heating chamber and the cooling chamber.

Casting device

In a casting device, when a mold varied in outer size depending on a position passes through a heat shielding portion between a heating chamber and a cooling chamber, a flexible portion of a heat shielding body is bent to fit the outer size of the mold.

A slurry for forming a mold includes a silica sol as a dispersion medium and niobia-stabilized zirconia dispersed in the silica sol.

Slurry for forming mold, mold and method for producing mold

A method for manufacturing a core (S) includes: a coating step (S) of adding an organic binder to a large particle group composed of silica-containing large particles, and coating surfaces of the large particles with the organic binder; a mixing step (S) of mixing, after the coating step (S), the large particle group and a small particle group composed of silica-containing small particles having a smaller particle size than the large particles; a laminate shaping step (S) of forming, after the mixing step (S), a molding in which a mixture of the large and small particle groups is used; and a sintering step (S) of sintering the molding after the laminate shaping step (S).

Method for manufacturing core, and method for manufacturing turbine member in which core is acquired by said core manufacturing method

A Ni-based alloy comprises nitrides, of which an estimated largest size is an area-equivalent diameter of 12 &#x3bc;m to 25 &#x3bc;m, the estimated largest size of the nitrides being determined by calculating an area-equivalent diameter D which is defined as D=Ain relation to an area A of a nitride with a largest size among nitrides present in a measurement field of view area Sof an observation of the Ni-based alloy, repeatedly performing this operation for n times corresponding to a measurement field of view number n to acquire n pieces of data of the area-equivalent diameter D, arranging the pieces of data of area-equivalent diameter D in ascending order into D, D, . . . Dto calculate a standardized variable y, plotting the area-equivalent diameter D and the standardized variable yon X and Y axes of an X-Y coordinate system, respectively, to obtain a regression line y=a&#xd7;D+b (wherein a and b are constants) to calculating ywhere a cross-sectional area to be predicted S is 100 mm, and substituting the obtained value of yinto the regression line to obtain the estimated largest size of the nitrides.

Ni-based alloy, ni-based alloy for gas turbine combustor, member for gas turbine combustor, liner member, transition piece member, liner, and transition piece

A coating layer including solely silicon alkoxide or mixed alkoxide of silicon alkoxide and aluminum alkoxide is formed on a surface of a sintered precision-casting core body mainly including silica particles so as to seal holes formed in the surface. As a result, it is possible to prevent the breakage of the core during casting.

Precision-casting core, precision-casting core manufacturing method, and precision-casting mold

Provided is a Ni-based single crystal superalloy containing

Ni-based single crystal superalloy

An alloy material having high-temperature corrosion resistance, which exhibits excellent oxidation resistance and ductility and can be applied to gas turbines used at ultra high temperatures, and a thermal barrier coating, a turbine member and a gas turbine each comprising the alloy material. An alloy material having high-temperature corrosion resistance, comprising, by weight, Co: 15 to 30%, Cr: 10 to 30%, Al: 4 to 15%, Y: 0.1 to 3%, and Re: 0.1 to 1%, with the balance being substantially Ni. Also, an alloy material having high-temperature corrosion resistance, comprising, by weight, Ni: 20 to 40%, Cr: 10 to 30%, Al: 4 to 15%, Y: 0.1 to 3%, and Re: 0.1 to 5%, with the balance being substantially Co.

Alloy material having high-temperature corrosion resistance, thermal barrier coating, turbine member, and gas turbine

In a specimen collecting method according to the present invention, a specimen is collected from a surface () of a blade. An ultrasonic cutter having a cylindrical cutting blade is fed from the surface () of the blade to a surface () of a base material (), and thus, a cylindrical incision is formed. After performing cutting to expand the incision outwardly, a rotating cutter () having a disc-shaped cutting blade () performs cutting inwardly from the cylindrical incision. Thus, a part () situated inside the incision is cut away. The part () becomes the specimen.

Specimen collecting method and blade temperature estimating method

Disclosed is a Ni-based sintered alloy used for preparing a high temperature part utilized under a high temperature gas atmosphere, characterized in that the Ni-based sintered alloy is prepared by mixing and heating two kinds of Ni alloy powders differing from each other in the melting point.

Ni-based sintered alloy

A high temperature corrosion resistant alloy composition comprising, in addition to Ni, 0.1 to 12% by weight of Co, 10 to 30% by weight of Cr, 4 to 15% by weight of Al, 0.1 to 5% by weight of Y, and 0.5 to 10% by weight of Re. The high temperature corrosion resistant alloy composition has an excellent oxidation resistance and ductility and is suitable for use in a bonding layer of a thermal barrier coating material.

High temperature corrosion resistant alloy, thermal barrier coating material, and gas turbine using high temperature corrosion resistant alloy

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Tokyo, Japan

Hidetaka Oguma