Hitachi Metals, Ltd.

Hitachi, Ltd.

Shinichiro Yokoyama

Hideki Nakamura

Fumio Tajima

Shigeki Morinaga

Yutaka Matsunobu

Osamu Koizumi

Suetaro Shibukawa

Masashi Kitamura

Tomonori Ueno

Kiyoshi Yamaguchi

Yukinori Taneda

Hakaru Sasaki

Hide Ueno

The present invention provides a method of manufacturing a semi-hard magnetic material comprising, sequentially: preparing a raw material consisting essentially of 10.0 to 25.0% of Ni, 2.0 to 6.0% of Mo and the balance being Fe and inevitable impurities, in mass %; heat-treating or hot-working the raw material so that it has not less than 90% of martensitic structure; cold-working the material at a reduction of area of not less than 50% so that it has an extended structure including not less than 95% of a martensitic structure; and heat-treating the material in a range of 400 to 570&#xb0; C. so as to generate more than 0% but less than 30.0% of reverse-transformed austenitic structure. The semi-hard magnetic material manufactured using this method can possess a coercive force of 1000 to 5600 A/m.

Method for manufacturing semi-hard magnetic material and semi-hard magnetic material

An Fe&#x2014;Co&#x2014;B alloy target, in which the largest inscribed circle depictable in regions containing no boride phases in its cross-sectional microstructure has a diameter of 30 &#x3bc;m or less. Its composition is represented by (FeCo)B(by atomic percentage), wherein 5&#x2266;X&#x2266;95, and 5&#x2266;Y&#x2266;30.

Fe-Co-B alloy target and its production method, and soft magnetic film produced by using such target, and magnetic recording medium and TMR device

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

Growing community of inventors

Yasugi, Japan

Shinichiro Yokoyama