Iron-based amorphous magnetically soft alloy with high saturation flux density and preparation method thereof

Abstract

The invention discloses an iron-based amorphous magnetically soft alloy with high saturation flux density and a preparation method thereof. The preparation method comprises the following steps that (1) primary molten steel is prepared, wherein the primary molten steel is obtained by performing blast furnace ironmaking and converter blowing on iron ore or by utilizing scrap steel through electric furnace smelting; (2) external refining is carried out on the primary molten steel for further deoxidization, desulfurization, and inclusion removal, the content of residual elements is controlled, andfine adjustment is carried out on alloy components to obtain the required refined molten steel; (3) the refined molten steel is rapidly cooled by using a single-roller rotary quenching technology toobtain an amorphous strip; and (4) heat treatment is just carried out on the amorphous strip to complete the preparation. The method is low in cost, short in process, high in efficiency and simple inprocess, can effectively control the components of the molten steel and the content of other residual elements, and can be used for large-scale production of the iron-based amorphous magnetically softalloy. The iron-based amorphous magnetically soft alloy prepared by using the method has high saturation flux density, and can be used as a magnetic core material to be applied to electronic devicessuch as a transformer, an electric reactor and a mutual inductor.

Description

technical field [0001] The invention belongs to the field of magnetic metal material preparation, and in particular relates to an iron-based amorphous soft magnetic alloy with high saturation magnetic induction and a preparation method thereof. Background technique [0002] Iron-based amorphous soft magnetic alloys are generally prepared by rapid cooling with a single-roller spin quenching method to obtain alloy strips. Since there are no defects such as grain boundaries in iron-based amorphous alloys to pin magnetic domains, they have excellent soft magnetic properties, such as Low coercive force (H c ), high effective permeability (μ e ) and extremely low loss (P). Compared with traditional silicon steel soft magnetic materials, the no-load loss of iron-based amorphous alloys used in transformers can be reduced by 80%, which can greatly save energy and promote the energy saving of electronic products. Development in the direction of high efficiency. At the same time, th...

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Problems solved by technology

Nippon Steel Corporation discloses a Fe-Si-B-P-C alloy with an iron content of 78% to 86% (atomic percentage, at.%) in the patent CN101589169A, wherein the P content is at 6% to 20% (atomic % content, at.%), too high P content greatly increases the difficulty of alloy smelting and strip preparation

In addition, the company announced a Fe-Si-B-P-C alloy with higher iron content in the patent CN1356403A, but the alloy has poor amorphous formation ability and cannot guarantee that the quenched strip has a complete amorphous structure, and the soft magnetic properties poor

Qingdao Yunlu Company announced a Fe-Si-B-P-C alloy with an iron content of 82.9% to 84.9% (atomic percentage, at.%) in the Chinese patent CN106636982A, but there are surface crystals in the strip prepared from industrial raw materials. The soft magnetic properties are poor, and it is usually necessary to remove the slag during the smelting process to prepare a complete amorphous strip, resulting in a more complicated process

[0006] In summary, there is still a lack of iron-based amorphous soft-magnetic alloys and their preparation methods that can not only ensure that iron-based amorphous soft-magnetic alloys have high saturation magnetic induction, but also meet low cost and process requirements.

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