Hitachi Metals, Ltd.

Other

Hitachi, Ltd.

Nippondenso Co., Ltd.

Hakaru Sasaki

Shuichi Nakamura

Tsutomu Inui

Keizo Takeuchi

Yoshitada Katayama

Toshiaki Terada

Shinya Sugiura

Rikizo Watanabe

Hideki Nakamura

Fumio Tajima

Shigeki Morinaga

Yutaka Matsunobu

Osamu Koizumi

Suetaro Shibukawa

Masahiro Mita

Masashi Kitamura

Kiyoshi Yamaguchi

Yukinori Taneda

Takayuki Shibata

Hiromitsu Itabashi

Youzou Majima

Shin-ichiro Yokoyama

Hironori Nakanishi

Shinichiro Yokoyama

Yoshiyuki Fujihara

Yoji Ishikura

Yasuyuki Ilda

Masato Hasegawa

Yasuyuki Iida

Shin-Ichiro Yokoyama

Disclosed are: a magnetic shielding material having excellent magnetic shielding property at a low magnetic field; and a magnetic shielding component and a magnetic shielding room each using the magnetic shielding material. Specifically disclosed is a magnetic shielding material comprising the following components (by mass): Ni: 70.0-85.0%, Cu: 0.6% or less, Mo: 10.0% or less and Mn: 2.0% or less, with the remainder being substantially Fe. The magnetic shielding material has a relative magnetic permeability of 40,000 or more under a magnetic field of 0.05 A/m and a squareness ratio (Br/B) of 0.85 or less, wherein the squareness ratio (Br/B) is a ratio of a remanent magnetic flux density (Br) to a maximum magnetic flux density (B) in a DC hysteresis curve produced under the maximum magnetic field of 0.8 A/m.

Magnetic shielding material, magnetic shielding component, and magnetic shielding room

The rotary machine is composed of the rotor having magnetic poles and the stator having the stator yoke portion constituting the iron core tooth portion wound by the stator winding and the flux flow path of the magnetic poles. The rotor is composed of a metallic material having ferromagnetic parts and non-magnetic parts as a member and has a magnetic barrier area composed of the slit portion for blocking the bypath magnetic path in the periphery of the rotor and the non-magnetic parts. The rotary machine that produced torque can be increased sufficiently and the mechanical strength during high-speed running is improved and an electrical vehicle using it.

Rotary machine having bypath magnetic path blocking magnetic barrier

Composite magnetic member, process for producing the member and electromagnetic valve using the member

A metallic member including not more than 0.6% C, 12 to 19% Cr, 6 to 12% Ni, not more than 2% Mn, not more than 2% Mo, not more than 1% Nb and the balance being Fe and inevitable impurities, where Hirayama's equivalent H eq=�Ni %!+1.05 �Mn %!+0.65 �Cr %!+0.35 �Si %!+12.6 �C %! is 20 to 23%; Nickel equivalent Ni eq=�Ni %!+30 �C %!+0.5 �Mn %! is 9 to 12%, and Chromium equivalent Cr eq=�Cr %!+�Mo %!+1.5 �Si %!+0.5 �Nb %! is 16 to 19, wherein % is by weight, is made to have at least one ferromagnetized part having a magnetic flux density B.sub.4000 of not less than 0.3 T and at least one non-magnetized part having a relative magnetic permeability .mu. of not more than 1.2 at a temperature of not less than -40.degree. C., as continuously and integrally formed. The non-magnetized part has crystal grain sizes of not more than 30 .mu.m. The metallic member is subjected to ferromagnetization and successive local non-magnetization of part or parts of the ferromagnetized member, and the thus obtained composite magnetic member is employed as a support member such as a sleeve in electromagnetic valves.

Composite magnetic member, process for producing the member and

The shadow mask sheet having excellent etchability and made of an Fe-Ni invar alloy consisting essentially of 30-40 weight % of Ni, the balance being substantially Fe and inevitable impurities, having a percentage of {100} texture of 85% or more in a rolled surface and a fibrous microstructure in a transverse cross section can be produced by hot-rolling the Fe-Ni invar alloy; conducting cold rolling at a rolling reduction ratio of 85% or more and annealing at 700.degree. C. or higher in this order at least once; and then conducting cold rolling at a rolling reduction ratio not exceeding that in the previous cold rolling step and annealing at a temperature of 850.degree. C. or lower in this order.

Shadow mask sheet, method of producing same and cathode ray tube

A high-strength lead frame material consists, by weight, of 0.5 to 22% Co, 22 to 32.5% Ni, not more than 1.0% Mn, not more than 0.5% Si, at least one kind of 0.1 to 3.0% in total selected from the group consisting of Nb, Ti, Zr, Mo, V, W and Be, and the balance Fe and incidental impurities; the total content of Ni and Co being selected so that the content of Ni is in the range of 27 to 32.5% when the content of Co is less than 12% and so that 66%.ltoreq.2Ni+Co.ltoreq.74% is met when the content of Co is not less than 12%; the lead frame material having a duplex-phase structure composed of a reverse-transformed austenite phase (which can involve a residual austenite phase) and a martensite phase; and the austenite phase being not less than 50%.

High-strength lead frame material and method of producing same

A high-fineness shadow mask material comprising 33-40% by weight of Ni, 0.0001-0.0015% by weight of one or more of boron, magnesium and titanium, and the remainder consisting essentially of Fe, wherein the contents of sulfur and aluminum are confined to not more than 0.0020% and not more than 0.020% by weight, respectively, and a process for producing the material. The shadow mask material according to this invention is excellent in hot working property and in etching properties.

High-fineness shadow mask material and process for producing the same

A high strength lead frame material consists essentially, by weight, of 0.5 to 22% Co, 22 to 32.5% Ni, not more than 1.0% Mn and not more than 0.5% Si and the balance Fe and incidental impurities. The contents of Ni and Co are selected so that the Ni content is 27 to 32.5% when the Co content is less than 12%, and so that, when the Co content is not less than 12%, the Ni content and the Co content meet the condition of 66%.ltoreq.2Ni+Co.ltoreq.74%. The material has a multi-phase structure formed of austenitic phase, martensitic phase, and ferritic phase, the austenitic phase occupying not less than 50% of the structure. The method of producing the alloy of the invention comprises the steps of solid-solutioning the material of the above composition at a temperature not less than austenitizing completion temperature, cold-rolling the material at a rate of 40 6to 90% in reduction, and annealing the material at a temperature less than the austenitizing completion temperature.

High strength lead frame material and method of producing the same

A high strength lead frame material consists, by weight, of 0.5 to 22% Co, 22 to 32.5% Ni, not more than 1.0% Mn and not more than 0.5% Si and the balance Fe and incidental impurities. The contents of Ni and Co are selected so that the Ni content is 27 to 32.5% when the Co content is less than 12%, and so that, when the Co content is not less than 12%, the Ni content and the Co content meet the condition of 66%.ltoreq. 2Ni+Co.ltoreq.74%. The material has a two-phase structure formed of austenitic phase and martensitic phase, the austenitic phase occupying not less than 50% of the structure.

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Matsue, Japan

Hakaru Sasaki