Nippon Mining Co., Ltd.

Nissan Motor Company Limited

Nippon Kokan Kabushiki Kaisha

Hideo Sakuyama

Hiroyoshi Suenaga

Chiaki Ouchi

Hideki Watanabe

Koichi Murata

Kimio Nishimura

Makoto Abe

Kiyoshi Hasegawa

Takashi Sekikawa

Yasushi Matsushita

Akihisa Hori

Takumi Ohshima

Michito Kishi

Masahiro Omata

Kazuhiro Takaichi

Kazuhiro Taki

Yasuhisa Koike

Hiroaki Shibukawa

Yohji Kohsaka

Masahide Kimura

Takuma Kinoto

Yuhei Yamane

Koji Higaki

Tatsuya Imai

Yoshito Ozawa

Ichiro Sawamura

Michio Hanaki

Ichiroh Sawamura

Michio Hanai

Hideo Takatori

A rotor structure for a rotary electric machine in which an inner surface of a hollow rotor core and an outer surface of a shaft inserted into a hole of the rotor core are fitted together by mutual engagement between a projection and a recess to compose a rotor, the rotor structure including: a first retainer brought into contact with one end of the rotor core; and a second retainer brought into contact with a surface of the first retainer opposite to a surface in contact with the rotor core so as to fix the first retainer and the rotor core to the shaft, wherein a coefficient of static friction of a first sliding surface between the first retainer and the second retainer is smaller than any other sliding surface provided in the rotor.

Rotor structure for rotary electric machine

A magnet evaluating device evaluates an evaluation magnet by passing the evaluation magnet, which is formed by connecting a plurality of magnetic sections with insulating material in between, and a master magnet of the same form through an alternating magnetic field generated by an excitation coil, measuring the eddy current occurring in the magnetic section as voltage or current occurring in a detection coil and comparing the measured value for the evaluation magnet and the measured value for the master magnet.

Magnet evaluating device and method

A .beta. type titanium alloy material is passed through processes and heating treatments of cold working--intermediate solution treatment--final cold working--final solution treatment--aging. In this process, a structure, which has been provided with strains by the cold working performed prior to the final cold working, will be changed into a recrystallized structure by carrying out the intermediate solution treatment, where uniform and fine micro substructure of dislocations, remain with grains. If such an intermediate solution-treated material is processed with a slight cold working by the final cold working and further with the solution treatment, only a recovery phenomenon progresses, and it is possible to provide such a micro substructure containing more uniform and finer dislocation network not only in grains but also in grain boundaries. Therefore, in the aging, expedition of precipitation and uniform distribution of .alpha. crystals will be realized in the grains and grain boundary regions, and intergranular cracking is difficult to take place, and alloy materials having high strength and high ductility may be produced.

Method for producing beta type titanium alloy materials having excellent

A method for producing Ti alloy plates, comprising heating an .alpha.+.beta. Ti alloy ingot to a temperature within the .alpha.+.beta. two phase range, forging or rolling said heated alloy ingot to reduce it more than 30% whereby strain energy accumulates in said ingot as it is being reduced, and reheating said reduced ingot containing said accumulated strain energy to a temperature of the .alpha.+.beta. phase range and then hot rolling said reheated reduced ingot so that it is further reduced in an amount more than an additional 30% whereby said accumulated strain energy accelerates recrystallization during said hot rolling to produce a uniform alloy structure, said heating and reheating being carried out in an atmosphere having not more than 0.02 atm oxygen partial pressure.

Method of producing Ti alloy plates

An excellently corrosion-resistant titanium-base alloy comprises, all by weight, either from 0.005% to less than 0.2% ruthenium or from 0.005% to 2.0% palladium or both, at least one of from 0.01% to 2.0% nickel, from 0.005% to 0.5% tungsten, and from 0.01% to 1.0% molybdenum, and the remainder titanium and unavoidable impurities.

Corrosion-resistant titanium-base alloy

A method of manufacturing a rolled titanium alloy sheet comprises breaking down an .alpha. or .alpha.+.beta. titanium alloy ingot into a slab, working the slab in sequential stages of

Method of manufacturing rolled titanium alloy sheets

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Kanagawa, Japan

Hideo Sakuyama