Iron-based amorphous soft magnetic alloy ribbon, method of making and use thereof

CN121428439BActive Publication Date: 2026-05-29NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
Filing Date
2025-12-31
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing Fe(-Co, -Ni)-based amorphous soft magnetic alloys present contradictions in terms of high saturation magnetic induction, low coercivity, amorphous formation capability, and processing performance, making it difficult to meet the comprehensive requirements of high-speed drive motors for new energy vehicles, thus limiting motor efficiency and reliability.

Method used

By employing the compositional design of FeaMbSicXd and through vacuum induction melting, melt quenching, and longitudinal magnetic field heat treatment processes, a fully amorphous iron-based amorphous soft magnetic alloy strip was prepared. By precisely controlling the element ratios and heat treatment parameters, a synergistic effect of high saturation magnetic induction intensity, low coercivity, and excellent processing performance was achieved.

Benefits of technology

It achieves high Bs (≥1.75 T), low Hc (≤3 A/m), high GFA (≥35 μm) and excellent processing performance, meeting the performance requirements of high-speed motors for new energy vehicles and improving motor efficiency and reliability.

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Abstract

The application provides an iron-based amorphous soft magnetic alloy strip, a preparation method and application thereof, and relates to the technical field of soft magnetic materials. The iron-based amorphous soft magnetic alloy strip realizes the balance of high saturation magnetic induction intensity, low coercivity, high amorphous forming ability and excellent processing performance through the synergy of accurate regulation of component proportion, element function, complete amorphous structure and heat treatment process. B s The torque output and power density of the motor are ensured, the low iron loss and high efficiency of the motor in high-frequency operation are ensured, and the excellent toughness meets the needs of precise machining of the iron core and long-term operation reliability. H c The torque output and power density of the motor are ensured, the low iron loss and high efficiency of the motor in high-frequency operation are ensured, and the excellent toughness meets the needs of precise machining of the iron core and long-term operation reliability. The preparation method of the iron-based amorphous soft magnetic alloy strip is designed through the process of vacuum induction melting + melt quenching + longitudinal magnetic field heat treatment, accurately matches the performance requirements of the component system, has the industrialization advantages of process stability, high efficiency and controllable cost, and provides a reliable technical path for the large-scale production and high-end application of the iron-based amorphous soft magnetic alloy strip.
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