Central Iron and Steel Research Institute

Advanced Technology & Materials Co., Ltd

Lidong Ding

Jian Wang

Guodong Liu

Pei Zhao

Quan Li

Zhiying Zhang

Shaoxiong Zhou

Goudong Liu

Chuanli Zhang

Jingbei Li

Shizhen Xu

Hongliang Ma

Xuecai Li

Wenzhi Chen

The invention belongs to the technical field of rapid solidification of amorphous alloy and concretely relates to an iron-based amorphous alloy broad ribbon, wherein the width is 220-1000 mm, the thickness is 0.02-0.03 mm, the transversal thickness deviation is smaller than +/&#x2212;0.002 mm, the lamination factor is larger than 0.84, the saturation magnetic-flux density is larger than 1.5 T, the iron loss is smaller than 0.20 W/kg under the conditions that the frequency is 50 Hz and the maximum magnetic-flux density is 1.3 T, and the exciting power is smaller than 0.50 VA/kg. The invention also relates to a manufacturing method of the broad ribbon, and a single-roll quenching method is adopted, wherein the width of a nozzle slot is 0.4-0.7 mm, the transversal width deviation of the nozzle slot is smaller than +/&#x2212;0.05 mm, the transversal flatness deviation of a cooling roll () is smaller than 0.02 mm, and the surface roughness Ra is smaller than 0.0005 mm.

Iron-based amorphous alloy broad ribbon and its manufacturing method

This invention relates to a Fe-Ni based high permeability amorphous alloy consisting of, in atom percent Ni 30-45%, Cr 0.5-1.2%, Si 5-14%, B 5-15%, P 1.0-3.0%, the balance Fe and inevitable impurities. The alloy is made by the rapid quenching melt method. It can be heat-treated in air and the excellent magnetic properties can be obtained as follows: B.sub.10 7900 Gs, B.sub.r 7500 Gs, H.sub.C 0.008 Oe, u.sub.m 68.times.10.sup.4. The present alloy is applied to make various magnetic devices which are used in electric apparatus and equipments.

Iron-nickel based high permeability amorphous alloy

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Beijing, China

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