PRODUCTION METHOD OF GRAIN ORIENTED SILICON STEEL PLATE BY HIGH SPEED ELECTRON BEAM IRRADIATION

Japanese Patent JP2014189832

A

PROBLEM TO BE SOLVED: To accurately synchronize convergence current position control with deflection without inviting film damage of an irradiation part, thereby magnetic domain fragmentation and low core loss making are effectively achieved, even when a scan speed (deflection speed) of an electron beam is made a high speed.SOLUTION: An electron beam irradiation method is that an electron beam is performed by a reciprocating scan in a straight line shape over at least 100 mm on the steel plate in a direction intersecting a rolling direction of a steel plate, and a linear recycling magnetic domain part is introduced to the steel plate, and is that in an irradiation pattern in which introduction of the recycling magnetic domain part by electron beam irradiation is made either a going process or a backing process, and when a beam scan speed of a process in which the introduction of the recycling magnetic domain part by the electron beam irradiation is performed is assumed Vp(m/s), the beam scan speed of a process in which the introduction of the recycling magnetic domain part by the electron beam irradiation is not performed is assumed Vs(m/s), the relation of the following formula (1): 30 m/s≤Vp≤Vs/3 --- (1) is satisfied about these Vp and Vs.

TAKAGI SHIGEHIRO
HANAZAWA KAZUHIRO

JP2013066128A

October 06, 2014

March 27, 2013

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JFE STEEL CORP

C21D8/12; H01F1/16

JP2012180543A	2012-09-20
JPH05335128A	1993-12-17
JPH059585A	1993-01-19
JPH0765109B2	1995-07-12
JP2012037316A	2012-02-23
JP2012194174A	2012-10-11
JP2012180543A	2012-09-20
JPH05335128A	1993-12-17
JPH059585A	1993-01-19

Kenji Sugimura
Kengo Yoshida

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