Rare-earth-doped iron-based amorphous thick strip and preparing method thereof

Abstract

The invention relates to a rare-earth-doped iron-based amorphous thick strip and a preparing method thereof. The component expression of the iron-based amorphous thick strip is FexSiaBbPcYd, wherein x, a, b, c and d are atomic percents of corresponding elements, wherein a is larger than or equal to 0.5 and smaller than or equal to 10, b is larger than or equal to 0.5 and smaller than or equal to 12, c is larger than or equal to 0.5 and smaller than or equal to 8, d is larger than or equal to 0.001 and smaller than or equal to 0.5, and x+a+b+c+d is equal to 100. A plane flow casting method is adopted for manufacturing the strip, during strip manufacturing, a double-line nozzle is adopted, the thickness of the prepared amorphous thick strip ranges from 50 micrometers to 100 micrometers, the lamination coefficient is larger than 0.92, the saturated magnetic induction density is larger than 1.67T. Micro rare earth yttrium is contained in an alloy, the content of impurities of oxygen, sulphur and the like is greatly reduced, and the molten steel mobility is improved; meanwhile the rare earth yttrium improves the amorphous forming capacity of an alloy system, and the amorphous alloy strip with the thickness ranging from 50 micrometers to 100 micrometers can be prepared through the technology method.

Description

technical field [0001] The invention belongs to the technical field of magnetic functional materials, and in particular relates to a rare earth-doped iron-based amorphous thick ribbon and a preparation method thereof. Background technique [0002] Soft magnetic materials refer to materials that are easily magnetized by a magnetic field, that is, they are magnetized at a low external magnetic field, and demagnetize quickly after the magnetic field is removed. At present, the soft magnetic materials widely used in engineering can be divided into two categories: soft magnetic alloys and soft ferrites. From the perspective of magnetic properties, due to the different physical basis of magnetic formation, there are obvious differences between soft magnetic alloys and soft ferrites. Soft magnetic alloys are ferromagnetic, and the exchange between electrons is strong and direct, so the saturation magnetic induction is high and the Curie temperature is high. The soft ferrite mater...

AI Technical Summary

Problems solved by technology

The existing technology generally adopts the spout plane flow casting method to make strips, and the thickness of the sprayed amorphous alloy strips generally does not exceed 40 μm, which limits the production efficiency of strips, the efficiency of iron core preparation and the improvement of performance.

Images