Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

National Institute for Materials Science

Sachio Shimohata

Ikuo Okada

Hidetaka Oguma

Kazutaka Mori

Yoshitaka Uemura

Hiroshi Harada

Shunsuke Torii

Masahiko Mega

Toshiharu Kobayashi

Junichiro Masada

Keizo Tsukagoshi

Yutaka Koizumi

Kosuke Fujiwara

Masaki Taneike

Tadaharu Yokokawa

Kyoko Kawagishi

Masao Sakamoto

Ryota Okimoto

Michinari Yuyama

Yuichi Ohtani

Tatsuya Ohira

Kimihiro Kishi

Seiji Katayama

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 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

A welding method forms a molten build-up portion on a base material that is any one of a single crystal material and a unidirectionally solidified crystal material. The method includes forming a plurality of build-up portions on the base material while maintaining a predetermined gap between adjacent build-up portions; and forming a build-up portion in each of the predetermined gaps.

Welding method

Provided is a directional solidification casting apparatus capable of heightening a cooling effect when molten material poured in a mold is directionally solidified. A mold () disposed around a predetermined area is drawn out from a heating chamber () heated above a melting temperature of metals for producing a casting (), and molten metals () held in a cavity () of the mold () are directionally solidified. The directional solidification casting apparatus () comprises a driving rod () by which the mold () is drawn out from the heating chamber (), a gas nozzle () through which a cooling gas is jetted from inside a predetermined area where the mold () is disposed so as to rapidly cool the mold (), and a gas nozzle () through which a cooling gas is jetted from outside the predetermined area where the mold () is disposed so as to rapidly cool the mold (). A baffle () that does not move even when the driving rod () moves up and down is additionally provided. The baffle () blocks radiant heat emitted from the heating chamber ().

Method and apparatus for directionally solidified casting

Growing community of inventors

Tokyo, Japan

Sachio Shimohata