Hitachi, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Babcock-hitachi Kabushiki Kaisha

Other

Nippon Steel Corporation

Hitachi Metals, Ltd.

Chugai Seiyaku Kabushiki Kaisha

Toshiba Lighting & Technology Corporation

The Japan Steel Works, Ltd.

Harison Toshiba Lighting Corporation

Hiroyuki Doi

Jun Sato

Shinya Imano

Masahiko Arai

Shinji Oikawa

Hideo Yoda

Yutaka Fukui

Hajime Toriya

Akira Yoshinari

Kenjiro Narita

Kunihiro Ichikawa

Tetsuo Kashimura

Hirotsugu Kawanaka

Kenichi Murata

Katsumi Tanaka

Shigeyoshi Nakamura

Takeshi Onoda

Ryo Hiraga

Mitsuo Kuriyama

Seishin Kirihara

Ichiro Yokozeki

Hideki Tamaki

Kenichi Usami

Akira Goto

Michiya Okada

Takayuki Ono

Toshihiro Uehara

Toshio Fujita

Isao Takehara

Tsukasa Azuma

Shinichi Kazui

Yoshitaka Kojima

Yasuhiko Tanaka

Takehiro Ohno

Kei Kobayashi

Hideyo Kodama

Takeji Shiokawa

Takashi Shibayama

Takao Endo

Hideyuki Arikawa

Makoto Matsuoka

Akira Mebata

Tsuyoshi Takano

Chiko Yorita

Hideaki Ishii

Tadashi Kasuya

Ken Yasuda

Haruyuki Yamazaki

Yutaka Hashimoto

Tatsuya Takahashi

Akira Okayama

Keiji Fujikawa

Shigeo Sakurai

Takashi Terai

Akihiro Toji

Eiji Nishioka

Koji Kajikawa

Eiji Saitou

Isamu Terashima

Manabu Kika

Tsutomu Sakamoto

Takaaki Tanaka

Toshiya Suzuki

Takayuki Ogasawara

Tadaoki Morimoto

Masayuki Sukekawa

Takashi Motoyoshi

Syouhei Maeda

Masaaki Kawamura

Nobuyasu Yamada

Yasuhide Sakaguchi

Choichi Asano

Takashi Sato

Tsutomu Takachi

Masanobu Kawase

Ioshiya Suzuki

Kenichiro Nomura

Seiko Yamamoto

Kazuto Mikazuki

Gang Bao

Akira Soeda

Shinichi Kobayasji

Hiroaki Chiba

Shinichirou Tooya

Takashi Haneishi

Mitsuru Takahira

Yuuichi Sekino

Yoshimasa Tashiro

Shinichi Kobayashi

Hidetoshi Kuroki

The present invention provides a method of cell culture comprising adding a cell-containing seed medium to an initial medium and starting to culture the cell in the initial medium, wherein the initial medium has an organism-derived culture medium additive added thereto and the amount of the C-terminal amidated species in the produced protein is controlled by the copper content of the initial medium at the start of cell culture.

Process of production with controlled copper ions

A steam turbine rotor blade achieving both abrasion resistance and reliability, and a method for manufacturing a steam turbine rotor blade capable of obtaining such a steam turbine rotor blade are provided. A steam turbine rotor blade according to the invention is characterized by including a blade base material and an erosion shield formed on a surface of the blade base material, wherein the blade base material is composed of a titanium alloy, and the erosion shield is composed of a weld overlay layer including a parent phase composed of pure titanium in which a metal element is solid-dissolved or a titanium alloy in which a metal element is solid-dissolved, and a hard phase dispersed in the parent phase.

Steam turbine rotor blade and method for manufacturing steam turbine rotor blade

It is an objective of the invention to provide a steam turbine rotor of which a rotor shaft is made of a low-cost heat resistant ferritic steel and that can withstand high main steam temperatures of about 650&#xb0; C. There is provided a steam turbine rotor comprising: a rotor shaft made of a heat resistant ferritic steel such as a 12-Cr steel; and a rotor blade made of a Ti&#x2014;Al alloy, wherein the Ti&#x2014;Al alloy includes: from 38 to 45 atomic % of Al; from 0.5 to 2 atomic % of V; from 2 to 6 atomic % of Cr and/or Mo; and the balance being Ti and incidental impurities.

Steam turbine rotor, steam turbine including same, and thermal power plant using same

A Ni-based alloy for a welding material including, by mass, 0.001 to 0.1% of C, 18 to 25% of Co, 16 to 20% of Cr, 2.5 to 3.5% of Al, 9.0 to 15.0% of Mo+W, 0.001 to 0.03% of B and the balance being Ni and inevitable impurities.

Ni-based alloy for welding material and welding wire, rod and power

It is an objective of the present invention to provide a precipitation-hardening martensitic stainless steel having well-balanced properties of high mechanical strength, high toughness and good corrosion resistance properties. There is provided a precipitation-hardening martensitic stainless steel comprising: 0.10 mass % or less of C; 13.0 to 15.0 mass % of Cr; 7.0 to 10.0 mass % of Ni; 2.0 to 3.0 mass % of Mo; 0.5 to 2.5 mass % of Ti; 0.5 to 2.5 mass % of Al; 0.5 mass % or less of Si; 0.1 to 1.0 mass % of Mn; and the balance including Fe and incidental impurities, in which the mass % content of the Ti (represented by [Ti content]), the mass % content of the Al (represented by [Al content]) and the mass % content of the C (represented by [C content]) satisfy relationships of '0.5&#x2266;[Ti content]&#x2266;2.5' and '0.5&#x2266;[Al content]+2[C content]&#x2266;2.7'.

Precipitation hardening martensitic stainless steel and steam turbine component made thereof

A nickel (Ni) based alloy for forging includes: 0.001 to 0.1 wt. % of carbon (C); 12 to 23 wt. % of chromium (Cr); 3.5 to 5.0 wt. % of aluminum (Al); 5 to 12 combined wt. % of tungsten (W) and molybdenum (Mo) in which the Mo content is 5 wt. % or less; a negligible small amount of titanium (Ti), tantalate (Ta) and niobium (Nb); and the balance of Ni and inevitable impurities.

Nickel based alloy for forging

A high-temperature piping product is configured from a plurality of primary pipe members and a welding material. The primary pipe members are each made from an Ni-based forged alloy containing: Ni, Al, and at least one of Mo and W. The total content of the Mo and the W being 3-8 mass %. The Ni-based forged alloy exhibiting a &#x3b3;'-phase dissolution temperature of from 920 to 970&#xb0; C., and the &#x3b3;&#x2032; phase being precipitated in 30 volume % or more in a temperature range of from 700 to 800&#xb0; C. The welding material is made from an Ni-based cast alloy having a cast structure formed by welding. The Ni-based cast alloy containing: Ni, Al, and at least one of Mo and W, the total content of the Mo and the W being 9-15 mass %, the Ni-based cast alloy exhibiting a &#x3b3;&#x2032;-phase dissolution temperature of from 850 to 900&#xb0; C.

High-temperature piping product and method for producing same

The problem to be solved of the present invention is to provide a precipitation hardening martensitic stainless steel having excellent tissue stability, strength, toughness, and corrosion-resistance, requiring no sub-zero treatment, and having excellent productivity; and also a steam turbine long blade using the same. The problem is solved by providing a precipitation hardening martensitic stainless steel containing, by mass, 0.1% or less of C; 0.1% or less of N; 9.0% or more and 14.0% or less of Cr; 9.0% or more and 14.0% or less of Ni; 0.5% or more and 2.5% or less of Mo; 0.5% or less of Si; 1.0% or less of Mn; 0.25% or more and 1.75% or less of Ti; 0.25% or more and 1.75% or less of Al, and the rest is Fe and inevitable impurities; and a steam turbine long blade using the precipitation hardening martensitic stainless steel.

Precipitation hardening martensitic stainless steel, and steam turbine long blade, steam turbine, and power plant using the same

An electrode connected to a TH pad requiring electric conduction is formed on a bonded surface of a first multilayer substrate having piercing TH to form a solder bump on the electrode. An electrode connected to the TH pad is formed on a bonded surface of a second multilayer substrate to be bonded having a piercing TH at a position opposite the electrode formed on the first multilayer substrate to form a solder bump on the electrode. A three-layered sheet is formed by applying an adhesive as a resin material that is not completely cured to both surfaces of a core material as the cured resin, and has holes at positions corresponding to the TH and the solder bump, respectively. The first and the second multilayer substrates are then laminated having the bonded surfaces facing each other while having the three-layered sheet positioned and interposed therebetween, and batch thermocompression bonded.

Method of manufacturing an interlayer connection substrate

There is provided a steam turbine rotor with high reliability and corresponding to increase in length of a high strength steel blade, in which only a low-pressure last stage is highly strengthened. The steam turbine rotor includes a steam turbine low-pressure last stage long blade made of a precipitation hardening type martensitic stainless steel containing, in mass, 0.1% or less of C, 0.1% or less of N, 9.0% to 14.0% inclusive of Cr, 9.0% to 14.0% inclusive of Ni, 0.5% to 2.5% inclusive of Mo, 0.5% or less of Si, 1.0% or less of Mn, 0.25% to 1.75% inclusive of Ti, 0.25% to 1.75% inclusive of Al, and the balance consisting of Fe and inevitable impurities, and a disk having a specific alloy composition is joined to a last stage section of the turbine rotor made of a low-alloy steel.

Steam turbine rotor

As a precipitate hardening stainless steel has excellent structure stability, strength, toughness, and corrosion resistance, requires no sub-zero treating and is excellent in terms of productivity, a long blade for a steam turbine uses the same. The following are provided: a precipitate hardening stainless steel, which comprises C at 0.05 mass % or less, N at 0.05 mass % or less, Cr at 10.0 mass % to 14.0 mass %, Ni at 8.5 mass % to 11.5 mass %, Mo at 0.5 mass % to 3.0 mass %, Ti at 1.5 mass % to 2.0 mass %, Al at 0.25 mass % to 1.00 mass %, Si at 0.5 mass % or less, and Mn at 1.0 mass % or less, and the balance is composed of Fe and inevitable impurities. The long blade for a steam turbine is composed of this precipitate hardening stainless steel.

Precipitate hardening stainless steel and long blade using same for steam turbine

The present invention provides, in a &#x3b3;' phase precipitation strengthening type Ni-base alloy, an alloy excellent in heat treatment capability and weldability and suitable for joint with a ferritic steel. Further, the present invention provides a welded turbine rotor having the strength, ductility, and toughness simultaneously over the whole welded structure when a precipitation strengthening type Ni-base alloy having a heatproof temperature of 675&#xb0; C. or higher is joined to a ferritic steel. A Ni-base alloy according to the present invention contains cobalt, chromium, aluminum, carbon, boron, and at least either tungsten or molybdenum with the remainder being nickel and inevitable impurities, having an alloy composition including 12 to 25 percent by mass of Co, 10 to 18 percent by mass of Cr, 2.0 to 3.6 percent by mass of Al, 0.01 to 0.15 percent by mass of C, 0.001 to 0.03 percent by mass of B, the total amount of tungsten and molybdenum being 5.0 to 10 percent by mass. A welded turbine rotor is structured by joining or building up by welding a second Ni-base alloy to a first Ni-base alloy that a &#x3b3;&#x2032; phase solid solution temperature thereof is 900&#xb0; C. or higher and a creep fracture strength at 675&#xb0; C. is 100 MPa or more, and further welding a ferritic steel to the second Ni-base alloy. The second Ni-base alloy is a &#x3b3;&#x2032; phase (NiAl) precipitation strengthening type Ni-base alloy, a &#x3b3;&#x2032; phase solid solution temperature thereof is 850&#xb0; C. or lower.

Ni-base alloy, high-temperature member for steam turbine and welded rotor for turbine using the same, and method for manufacturing the same

It is an objective of the invention to provide a Ni-based forged alloy having good large ingot formability and good hot formability as well as high mechanical strength at high temperature. There is provided a Ni-based forged alloy comprising: 0.001 to 0.1 mass % of C; 0.001 to 0.01 mass % of B; 16 to 22 mass % of Cr; 0.5 to 1.5 mass % of Al; 0.1 to 6.0 mass % of W; 3.5 to 5.5 mass % of Nb; 0.8 to 3.0 mass % of Ti; 16 to 20 mass % of Fe; 2.0 mass % or less of Mo; and the balance including Ni and unavoidable impurities, in which: a segregation parameter Ps defined by a formula of 'Ps (mass %) =1.05&#xd7;[Al concentration (mass %)]+0.6&#xd7;[Ti concentration (mass %)]&#x2212;0.8&#xd7;[Nb concentration (mass %)]&#x2212;0.3&#xd7;[Mo concentration (mass %)]' satisfies a relationship of 'Ps&#x2267;&#x2212;3.0 mass %'; and a total amount of W and Mo is 1.75 atomic % or less.

Nickel based forged alloy, gas turbine member using said alloy and gas turbine using said member

In a gas turbine blade where a part of the &#x3b3;' phase precipitation strengthened type Ni-based alloy base material is composed of a weld metal, the weld metal is a Ni-based alloy containing Ta from 4.8 to 5.3 wt. %, Cr from 18 to 23 wt. %, Co from 12 to 17 wt. %, W from 14 to 18 wt. %, C from 0.03 to 0.1 wt. %, Mo from 1 to 2 wt. %, and Al of 1 wt. % or less, in which the oxygen content is 0 to 30 ppm, the Ti content from 0 to 0.1 wt. %, and the Re content from 0 to 0.5 wt. %. A blade base metal is manufactured by the step of stripping, the step of solution heat treatment where the &#x3b3;&#x2032; phase is dissolved again, the step of welding in an inert gas chamber by a TIG method using a welding wire where the weld metal can be obtained, the step of HIP treatment at 1100&#xb0; C. to 1150&#xb0; C., and the step of an aging treatment at 835&#xb0; C. to 855&#xb0; C.

Gas turbine blade and manufacturing method thereof

Growing community of inventors

Tokai, Japan

Hiroyuki Doi