The object of the present invention is to provide a low iron loss and low noise
grain-oriented electrical steel sheet for securing both low core loss and low noise
of a transformer at the same time.
The present invention relates to a grain-oriented electrical steel sheet containing
Si: 1.0-4.0 wt % produced by controlling, with regard to O, which
is defined as a 0-p value when a grain-oriented electrical steel sheet is magnetized
up to a saturated magnetic flux density, and 17, which is defined
as the value obtained by subtracting a 0-p value at the magnetization magnetic
flux density of 1.7 T from a 0-p value at a saturated magnetic flux density, OC
and 17L, which are absolute values deviated by forming a tension
film and a forsterite film, and OL and 17L,
which are absolute values deviated by irradiating laser after the film formation,
in adequate ranges respectively, and further controlling 17,
which is a 0-p value at the magnetization magnetic flux density of 1.7 T, in the
most appropriate range, when measuring a 0-p value of magnetostriction vibration
in the rolling direction.
