Mitsubishi Heavy Industries Limited

Nippon Steel Corporation

Mitsubishi Jukogyo Kabushiki Kaisha

Mitsubishi Heavy Industries Compressor Corporation

Japan Kanigen Co. Ltd.

Mitsubishi Heavy Industires, Ltd

Yoshikazu Yamada

Toyoaki Yasui

Katsuyasu Hananaka

Yuzo Tsurusaki

Satoshi Hata

Osamu Isumi

Shugo Iwasaki

Atsushi Nakajima

Shinichiro Tokuyama

Yukio Tomita

Kyoichi Ikeno

Koji Tanabe

Akira Usami

Kiyotaka Aoki

Kenichi Nemoto

Yukiharu Suzuki

Hidesato Mabuchi

Seiichi Kawanami

Mikiyasu Urata

Ryuichiro Ebara

Hiroshi Kondo

Daisuke Takemura

Kazuhide Saito

Tatsuya Osawa

Seiichi Yarimizu

Kazuhide Yamauchi

Katsutoshi Hashima

Masuo Matsumoto

A method includes: an arrangement step of arranging a phased array probe including a plurality of oscillators each of which is capable of emitting ultrasonic waves on an end surface of the rotor disc, in a parallel state in which the plurality of oscillators are arranged along a circumferential direction of the rotor disc; a first transmission step of emitting ultrasonic waves from the plurality of oscillators in the parallel state, while a timing of emitting the ultrasonic waves from each of the oscillators is controlled in a first emission pattern, and receiving reflection waves of the ultrasonic waves; and a second transmission step of emitting ultrasonic waves from the plurality of oscillators in the parallel state, while the timing of emitting the ultrasonic waves from each of the oscillators is controlled in a second emission pattern different from the first emission pattern, and receiving reflection waves of the ultrasonic waves.

Ultrasonic flaw-detection method and apparatus for blade groove in turbine rotor disc

A method of manufacturing a material for a rotary machine component, by performing at least a solution treatment on a material made of a duplex stainless steel, wherein, in the solution treatment, the material is heated to a temperature in a range of 950 to 1100&#xb0; C. and is thereafter cooled to 700&#xb0; C. at an average cooling rate of equal to or greater than 20&#xb0; C./min.

Method of manufacturing material for rotary machine component, method of manufacturing rotary machine component, material for rotary machine component, rotary machine component, and centrifugal compressor

A solid particle erosion resistant surface treated coating has a solid particle erosion resistance that is largely enhanced and a rotating member having the coating gains oxidation resistance without deteriorating a fatigue strength. Also, a rotating machine can have this coating applied thereto. The solid particle erosion resistant surface treated coating has a nitrided hard layer formed on a surface of a base material and a PVD (physical vapor deposition) hard layer of at least one layer formed on the nitrided hard layer by a PVD method. Deformation of the base material by collisions by solid particles is prevented and cracking of the coating is prevented. Thereby, the solid particle erosion resistance is secured, life of the solid particle erosion resistant surface treated coating can be increased and oxidation resistance and fatigue strength are enhanced.

Solid particle erosion resistant surface treated coating and rotating machine applied therewith

The present invention provides parts of a rotation machine which effectively prevent particulates, such as silica, iron oxide, and other particles, contained in a gas to adhere to the rotating machines which work with the gases containing the particulates. An intermediated metal-plated film and a plated film containing fluorocarbon polymer particles provided on the intermediate metal-plated film are deposited on the surfaces of moving blades used in a steam turbine. The plated film containing the fluorocarbon polymer particles includes fluorocarbon polymer particles made of any of Ni-based metals and a plated matrix, and some of the fluorocarbon polymer particles are exposed at the surfaces of the plated matrix.

Rotating machine and parts of the same

A coating layer is provided on a surface of the moving blades of a rotary machine. The coating layer includes a spray layer on the base material of the moving blades and a fluorocarbon resin layer on the spray layer. The spray layer is porous. The fluorocarbon resin layer is made of fluorocarbon resin. The fluorocarbon resin layer also contains an inorganic substance that is exposed on the surface of the fluorocarbon resin layer.

Component for rotary machine and rotary machine

The present invention has an object to provide a steel for a chimney or a gas duct, which is excellent in pitting resistance and rust adhesion in a corrosive environment caused by combustion waste gas in a plant in which the combustion of natural gas occurs. Pitting resistance and rust adhesion are remarkably improved in the steel of the present invention which steel is prepared by using a 5% Cr steel as the base, while reducing an impurity sulfur to not more than 0.010 wt. %, adding titanium within a range of 0.005 to 0.05 wt. %, and further adding nickel alone within a range of 1.0 to 2.5 wt. %, or adding molybdenum alone within a range of 0.10 to 1.0 wt. %, or adding in combination therewith trace amount of copper or molybdenum within a range of 0.10 to 1.0 wt. %.

Steel for chimney or gas duct, excellent in pitting resistance and rust

Growing community of inventors

Hiroshima, Japan

Yoshikazu Yamada