Michiro Komatsubara
Kawasaki Steel Corporation
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Featured researches published by Michiro Komatsubara.
Electrical Engineering in Japan | 1999
Kunihiro Senda; Masayoshi Ishida; Keiji Sato; Michiro Komatsubara; Toshinao Yamaguchi
The accuracy of a needle probe method in measuring localized magnetic properties of grain-oriented electrical steel sheets was investigated and its application studied. The measuring error for the localized flux density was determined to be less than 1.7% for a load on the needle tip lighter than 300 g when the yoke structure was symmetrical with respect to the sheet plane. The average of localized iron losses measured with the combination of a needle probe and a Hall probe was in linear relation to the overall losses in the sheet. This method revealed that the localized magnetic properties vary markedly from location to location inside the sheet, and that localized iron loss depends on the localized flux density, domain wall spacing, and yaw angle of grain orientation.
Journal of Applied Physics | 1999
Kenichi Sadahiro; Yasuyuki Hayakawa; Mitsumasa Kurosawa; Michiro Komatsubara
Measurements of the growth rate for the individual secondary recrystallized Goss grain in Fe–3%Si containing AlN and MnSe as grain growth inhibitors were made by the ultrasonic interferometry. It was found that the growth rates in the rolling direction for secondary recrystallized grains varied from 0.3 to 0.6 mm/min, and that the growth rate in the rolling direction is 1.2–1.9 times higher than that of the cross-rolling direction. The set of results were explained in terms of the concept of the “growth advantage” which is defined as the fraction of high-energy grain boundaries having the misorientation angles between 20° and 45° with respect to the specific secondary recrystallized grain in the primary recrystallized grains.
Journal of Materials Engineering | 1991
M. Kurosawa; Keiji Sato; Michiro Komatsubara; Bunjiro Fukuda
Iron loss and magnetostriction in domain refined highly grain oriented Si steel sheets were investigated. The degree of grain refining effect on iron loss has been found to be significantly influenced by crystal orientation. This phenomenon is explained by that reappearance of lancet domains during magnetization is strongly influenced by the tilt angle of [001] axis from sheet plane.
Journal of Magnetism and Magnetic Materials | 1994
Michiro Komatsubara; Yasuyuki Hayakawa; Masaki Kawano
Abstract The influence of continuous changes in crystal orientation inside grains of grain-oriented 3% Si steel sheets on their magnetic properties was investigated. It was demonstrated that the changing rate of β (tilt angle of [001] out of the sheet plane) inside a grain is determined by the the radius of curvature ( R ) in coils at the secondary recrystallization annealing, and that the average β over the whole sheet increases as R decreases. The increase in β strongly affected the domain structure and hence the magnetic properties. A minimum iron loss was obtained at the value of R at which the average β was about 2°, even when β changed inside grains.
Isij International | 1997
Minoru Takashima; Michiro Komatsubara; Nobuyuki Morito
Archive | 1996
Michiro Komatsubara; Kunihiro Senda; Takafumi Suzuki; Hiroaki Toda; Hiroi Yamaguchi
Archive | 1988
Atsuhito Honda; Michiro Komatsubara; Ko Matsumura; Keiji Nishimura
Archive | 1997
Michiro Komatsubara; Toshito Takamiya; Kunihiro Senda; Mineo Muraki; Chizuko Goto; Mitsumasa Kurosawa; Kazuaki Tamura
Archive | 1989
Ujihiro Nishiike; Michiro Komatsubara; Yoshiaki Iida; Isao Matoba
Isij International | 1998
Tetsuo Toge; Mineo Muraki; Michiro Komatsubara; Takashi Obara