Hitachi, Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Hitachi Automotive Systems, Ltd.

Kenya Ohashi

Masahiko Ogino

Akihiro Miyauchi

Haruo Akahoshi

Moriaki Fuyama

Mitsuru Hasegawa

Hitoshi Suzuki

Katsumi Ohsumi

Akira Minato

Noriyuki Ohnaka

Takashi Honda

Toshio Haba

Shinya Imano

Noriyuki Maekawa

Masahiro Itoh

Yasuo Hira

Kazumi Fujii

Yasumasa Furutani

Kiyoshi Miyake

Masayasu Fujisawa

Seunghwan Park

Mitsuyoshi Shouji

Yukihiro Isono

Koichi Yamaka

Takahiko Sano

Ryo Ishibashi

Katsuhito Takahashi

Takeshi Obana

Eizi Kashimura

Mina Amo

Takeshi Fukuma

Shigeo Aikawa

Hisao Itou

Yoshiharu Waki

Arata Kagiyama

Tomoya Kato

Kazutoshi Itoo

Shoichiro Ogata

Naritaka Kobayashi

Mitsuharu Ikeda

Kyoko Hombo

Eiji Kashimura

Provided is a high-pressure fuel supply pump and a method of manufacturing thereof which can suppress the progress of corrosion and cavitation erosion even when the pressure becomes higher, or when biofuel or a fuel having a high oil content of biofuel is used. Therefore, the high-pressure fuel supply pump includes a discharge valvethat discharges fuel, and a discharge valve seaton which the discharge valveis seated. The base material of the discharge valveand the discharge valve seatis a steel material. On the surface of the discharge valve, a Co-based alloy layerand a Cr-enriched portionhaving a higher Cr concentration than the surrounding Co-based alloy layerare formed. The Co-based alloy layeris formed on the surface of the discharge valve seat

High-pressure fuel supply pump and method of manufacturing the same

The objective of the present invention is to provide a corrosion resistance evaluation method and evaluation device that make it possible to estimate crevice corrosion depth and pitting depth in a short period of time. A corrosion resistance evaluation method according to the present invention is characterized in that the surface potential of a metal under evaluation is measured in a state in which the metal is immersed in a usage-environment liquid, the surface potential distribution of the metal is determined, the surface potential differences in the microstructure of the metal are calculated on the basis of the surface potential distribution, and the corrosion rate of crevice corrosion and corrosion rate of pitting are predicted using the maximum surface potential difference from among the calculated surface potential differences as an evaluation index for corrosion evaluation.

Metal corrosion resistance evaluation method and evaluation device using in-liquid potential measurement

Provided is high corrosion resistant equipment for a plant having the lining structure which exhibits high reliability against breaking of a joining portion over a long use period. The high corrosion resistant equipment for a plant includes a lining plate and a support portion which are made of a high corrosion resistance material and a structural material portion made of a steel material or the like. The lining plate and the support portion include a joining portion to which friction stirring is applied. The support portion is assembled into or fastened to the structural material portion by means of the geometrical structure with a gap interposed between the support portion and the structural material portion. Due to such a constitution, high corrosion resistant equipment for a plant having the lining which exhibits high reliability can be acquired.

High corrosion resistant equipment for a plant

The fine pattern mold that includes a roll, a buffer tube with inner peripheral surface is in contact with an outer peripheral surface of the roll, and a stamper tube in which its inner peripheral surface is in contact with an outer peripheral surface of the buffer tube and a fine concave/convex pattern is formed on its outer peripheral surface, wherein the buffer tube has a larger coefficient of linear expansion and a smaller elastic modulus than those of the stamper tube.

Fine pattern mold

A mold for forming a resin pattern using nanoimprint lithography according to the present invention comprises a main mold including a fine pattern of a protrusion and a depression intended to be transferred, and a spacer for forming a space between the protrusion of the fine pattern of the main mold and a transferred object during a transfer of the fine pattern, in which the spacer has a vent passage capable of flowing gas therethrough and has an elasticity against a pressing force during the transfer.

Mold for fine pattern transfer and method for forming resin pattern using same

An imprinting stamper which can transfer a microscopic pattern to a medium bearing a convex area or local projection, with high accuracy. A convexo-concave pattern is formed on a surface of the imprinting stamper. It includes a pattern layer having the convexo-concave pattern; and a stamper backside layer arranged on a backside of the pattern layer. Young's modulus of the pattern layer is 500 MPa to 10 GPa; and Young's modulus of the stamper backside layer is smaller than Young's modulus of the pattern layer.

Imprinting stamper and method of manufacturing the same

The fine pattern mold comprises: that includes a roll, a buffer tube with inner peripheral surface is in contact with an outer peripheral surface of the roll, and a stamper tube in which its inner peripheral surface is in contact with an outer peripheral surface of the buffer tube and a fine concave/convex pattern is formed on its outer peripheral surface, wherein the buffer tube has a larger coefficient of linear expansion and a smaller elastic modulus than those of the stamper tube.

A turbine generator has a water cooling system for cooling the inside of a stator coil with water, wherein the water cooling system includes a water storage tank for storing water; pipes connecting the water storage tank and the stator coil, the pipes being provided in an inlet side and in an outlet side; a decarbonated air injection unit connected to the inlet side of the pipe by a pipe or a decarbonated air injection unit connected to the water storage tank; a heater for heating the water, the stator coil having an oxide film on a surface in contact with the water, the oxide film being formed before starting operation of the generator by high temperature water injected with the decarbonated air and heated by the heater; and a control unit for effecting control so that the decarbonated air is always and continuously injected into the cooling water during operation of the generator.

Turbine generator and operating method thereof, and nuclear power plant and operating method thereof

A Mg alloy member with an anticorrosive coating free from any enviromental load can be produced by using a solution for chemical conversion treatment for anticorrosive coating, which comprises 0.05 to 1 mol/l of an oxoacid compound of heavy metal selected from Mo, W and V and has a pH of 2 to 6 adjusted by sulfuric acid or nitric acid, and is characterized by contacting the surface of Mg alloy preferably containing 2 to 10% Al with the solution, thereby forming a specific oxide film and, if necessary further forming a fluorine-containing organic film on the film, the resulting Mg alloy member being used in electrically driven blowers, note-type personal computers, various household electrical appliances, etc.

MG alloy member and its use

A highly corrosive-resistant metal having a high purity and a specific plane index is manufactured by ion beam deposition (IBD). A thin film having less defects and impurities is obtained. A magnetoresistant effect film for a magnetoresistant effect type magnetic head which is highly corrosion-resistant and exhibits excellent characteristics can be formed. In IBD according to the present invention, metal ions are provided with adjusted ion energy of 10 to 100 eV, and a metal having a particular mass number is selected by a mass separation electromagnet.

Magnetic disk device having a corrosion resistant magnetoresistive head

Corrosion-resistant laminate which consists of a metal of a single mass

This invention provides a lap capable of reducing the pole recession produced between the substrate and the magnetic film when the air-bearing surface of a thin-film magnetic head is lapped, a lapping liquor used for such lapping, and a thin-film magnetic head having its air-bearing surface lapped by using them. Lapping is carried out by using a lap made of a material having both a phase of tin and a phase of brass with a greater rigidity in supporting the abrasive grains than tin, and a lapping liquor prepared by mixing an anionic surfactant (15) and an ampholytic surfactant (16). According to the present invention, it is possible to reduce the pole recession in the thin-film magnetic heads and to accordingly shorten the recording bit length of the magnetic discs.

Lap and lapping liquor

A nuclear power plant wherein surfaces of components contacting with nuclear reactor cooling water containing radioactive substances are coated with an oxide film, preferably being charged positively and/or containing chromium in an amount of 12% by weight or more, is prevented effectively from the deposition of radioactive substances thereon.

Inhibition of deposition of radioactive substances on nuclear power

The present invention is concerned with a method of reducing radioactivity in a nuclear plant by preliminarily forming oxide films on the surfaces of metallic structural members to be in contact with high-temperature and high-pressure reactor water containing radioactive substances before said metallic members are exposed to said reactor water. The method is characterized by the steps of subjecting said structural members to a first-step oxidation treatment of heating said structural members in an environment of a high temperature, and further subjecting the thus treated structural members to a second step oxidation treatment of heating said treated structural members in an environment having a higher oxidizing capacity than that of said environment in said first-step oxidation treatment to form a denser oxide film than an oxide film obtained in said first step oxidation treatment. According to the present invention, radioactivity in the nuclear plant can be reduced remarkably.

Method of reducing radioactivity in nuclear plant

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Hitachinaka, Japan

Kenya Ohashi