US 11,952,651 B2
Fe-based amorphous alloy ribbon, production method thereof, iron core, and transformer
Hajime Itagaki, Tokyo (JP); Morifumi Kuroki, Tokyo (JP); Makoto Sasaki, Tokyo (JP); and Shin Nakajima, Tokyo (JP)
Assigned to PROTERIAL, LTD., Tokyo (JP)
Appl. No. 17/620,284
Filed by PROTERIAL, LTD., Tokyo (JP)
PCT Filed Jun. 24, 2020, PCT No. PCT/JP2020/024911
§ 371(c)(1), (2) Date Dec. 17, 2021,
PCT Pub. No. WO2020/262494, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2019-121525 (JP), filed on Jun. 28, 2019; application No. 2019-178568 (JP), filed on Sep. 30, 2019; application No. 2020-024119 (JP), filed on Feb. 17, 2020; and application No. 2020-054544 (JP), filed on Mar. 25, 2020.
Prior Publication US 2022/0364212 A1, Nov. 17, 2022
Int. Cl. C22C 45/00 (2023.01); B23K 26/362 (2014.01); C21D 8/12 (2006.01); C22C 45/02 (2006.01); H01F 1/153 (2006.01); H01F 27/25 (2006.01); H01F 27/255 (2006.01); H01F 30/10 (2006.01); H01F 30/12 (2006.01)
CPC C22C 45/008 (2013.01) [B23K 26/362 (2013.01); C21D 8/1294 (2013.01); C22C 45/02 (2013.01); H01F 1/15308 (2013.01); H01F 27/25 (2013.01); H01F 27/255 (2013.01); H01F 30/10 (2013.01); H01F 30/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An Fe-based amorphous alloy ribbon having a first surface and a second surface,
the Fe-based amorphous alloy ribbon having continuous linear laser irradiation marks on at least the first surface,
the linear laser irradiation marks being formed by a CW (continuous wave) oscillation method along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon,
each linear laser irradiation mark having unevenness on its surface in the casting direction, the unevenness of each linear laser irradiation mark on its surface being a height difference HL between a highest point and a lowest point in a thickness direction of the Fe-based amorphous alloy ribbon, and
each linear laser irradiation mark having a width WA, which is a length of the linear irradiation mark on the first surface in the casting direction,
the height difference HL×width WA for each linear laser irradiation mark being 6.0 to 180 μm2, and
wherein the Fe-based amorphous alloy ribbon having said continuous laser irradiation marks on at least the first surface has an iron loss of 0.130 W/kg or less under a condition of a frequency of 60 Hz and a magnetic flux density of 1.45 T.