A kind of iron-based amorphous alloy with low stress sensitivity and preparation method thereof

Abstract

The present invention provides an iron-based amorphous alloy as shown in formula (I), wherein a, b and c respectively represent the atomic percentages of the corresponding components; 79.5≤a≤82.5, 11.0≤b≤13.5, 6.5≤c≤8.5, a+b+c=100. The present application also provides a preparation method of the iron-based amorphous alloy strip represented by the formula (I). The present application adjusts the composition and content of the iron-based amorphous alloy so that the obtained iron-based amorphous alloy has higher saturation magnetic induction intensity, higher amorphous forming ability and lower stress resistance sensitivity, making it usable It is used in the production of iron core materials for power transformers, generators and engines; at the same time, due to its low stress sensitivity, it can improve the sudden short-circuit resistance of amorphous transformers when making power transformers; Fe a B b Si c (Ⅰ).

Description

technical field [0001] The invention relates to the technical field of iron-based amorphous alloys, in particular to an iron-based amorphous alloy with low stress sensitivity and a preparation method thereof. Background technique [0002] Due to its low iron loss, high saturation magnetic flux density, high magnetic permeability and other advantages, Fe-based amorphous alloy thin strips such as Fe-Si-B amorphous alloy thin strips are widely used as iron cores for power transformers and high-frequency transformers. Based on the above characteristics, amorphous iron-based materials have been leading the way in the field of transformers for a long time. [0003] With the continuous update of silicon steel materials, the advantages of amorphous materials are relatively weakened. For example, the saturation magnetic density of amorphous materials is obviously low, the magnetic induction is low, and the anti-stress sensitivity is poor. A lot of work has been done on amorphous ma...

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Problems solved by technology

This characterization method can explain the stress release of different components to a certain extent, but the inventor only uses the degree of stress release to explain the internal stress removal angle of the single strip after annealing, without considering the final soft magnetic properties of the material and the assembly of the transformer core. Deterioration of performance after stress

[0010] As mentioned above, although the implementation of the above-mentioned invention example has optimized the annealing process or the assembly process of the amorphous transformer core, which can relieve the stress of the amorphous strip to a certain extent, it does not specifically consider the impact of these optimizations on the strip. The comprehensive consideration of the feasibility of preparation and implementation, and the lack of a more comprehensive understanding of the stress relief (avoidance of stress) of amorphous strips, the results are relatively one-sided

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