Central Iron and Steel Research Institute

Advanced Technology & Materials Co., Ltd

Advanced Technology & Material Co., Ltd.

Shaoxiong Zhou

Jian Wang

Ming Wang

Liang Zhang

Feng Guo

Guodong Liu

Quan Li

Pei Zhao

Zhiying Zhang

Lidong Ding

Wenzhi Chen

Zhichao Lu

Deren Li

Caowei Lu

Jianliang Li

Tongchun Zhao

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

The present invention provides a compound powder for making magnetic powder cores, a kind of magnetic powder core, and a process for making them. Said compound powder is a mixture composing of powder A and powder B, the content of powder A is 50-96 wt % and the content of powder B is 4-50 wt %, wherein powder A is at least one selected from iron powder, Fe&#x2014;Si powder, Fe&#x2014;Si&#x2014;Al powder, Fe-based nanocrystalline powder, Fe-based amorphous powder, Fe&#x2014;Ni powder and Fe&#x2014;Ni&#x2014;Mo powder; powder B bears different requirement characteristics from powder A and is at least one selected from iron powder, Fe&#x2014;Si powder, Fe&#x2014;Si&#x2014;Al powder, Fe-based nanocrystalline powder, Fe-based amorphous powder, Fe&#x2014;Ni powder and Fe&#x2014;Ni&#x2014;Mo powder. Said powder B adopts Fe-based amorphous soft magnetic powder with good insulation property as insulating agent and thus core loss of magnetic powder core decreases. The decrease of magnetic permeability of magnetic powder core resulting from a traditional insulating agent is remedied and the initial magnetic permeability of magnetic powder core is improved by taking advantage of soft magnetic properties of Fe-based amorphous powder.

Compound magnetic powder and magnetic powder cores, and methods for making them thereof

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Beijing, China

Shaoxiong Zhou