高铁含量FeBCSiP非晶合金超厚带材及性能研究

The mass production and industrial application of Fe-based amorphous soft magnetic alloy ribbons have been achieved. Increasing ribbon thickness can increase the lamination factor of the amorphous alloy core and reduce the volume of the core, meeting the demands of the current technology for miniaturization and high integration of power electronic devices and equipment. However, due to the limitation of amorphous forming ability and industrial production conditions, it is still difficult to produce industrial Fe-based soft magnetic amorphous alloy ribbons with the thickness exceeding 30 μm. In this paper, ultra-thick amorphous alloy ribbon with the nominal composition of Fe_81.8B_12.8C_2.8Si_1.8P_0.8, a thickness of 35 μm and a width of 50 mm (denoted as AA35 ribbon) was successfully prepared by using the industrial equipment. The saturation magnetic flux density (B_s ) of the ribbon is 1.67 T and the coercivity (H_c ) of the ribbon after optimized magnetic field annealing is 1.8 A/m. Moreover, the iron loss under the conditions of the working frequency of 1 kHz and the working magnetic flux density of 1.55 T (P _{s(1 kHz-1.55 T)}) is only 12.04 W/kg. Compared with the industrialized 1K101 amorphous alloy ribbon (B_s = 1.56 T, with the thickness of 25 μm), AA35 ribbon has lower iron loss under high working magnetic flux density, Particularly, it can even be used when the working magnetic flux density is in the range of 1.50–1.60 T and the working frequency is in the range of 1–5 kHz. These results provide a high-B_s ultra-thick amorphous soft magnetic alloy ribbon material for industrial applications, and simultaneously offer the corresponding performance control technology for optimizing the soft properties.