fe-si-b-nb-cu iron-based amorphous/nanocrystalline soft magnetic alloy material and its preparation and heat treatment process

Abstract

The invention discloses an Fe-Si-B-Nb-Cu iron-based amorphous / nanocrystalline soft magnetic alloy material and a preparing and heat treatment process. The Fe-Si-B-Nb-Cu iron-based amorphous / nanocrystalline soft magnetic alloy material comprises following composition elements including, by mass percent, 81 to 83% of Fe, 8.5 to 9.5% of Si, 1.5 to 2% of B, 3 to 4.5% of Nb, 1 to 2% of Cu, 1 to 2% of Mo, 0 to 0.5% of Ni and 0 to 0.5% of Cr. A small amount of metal elements of Mo, Ni and Cr is introduced into the Fe-Si-B-Nb-Cu system, the better amorphous forming capacity of the Fe-Si-B-Nb-Cu iron-based amorphous / nanocrystalline soft magnetic alloy material is ensured, through the heat treatment process, an alloy strip of an amorphous structure is obtained, in the strip spraying and heat treatment process, the oxidation resistance capacity is better, in the heat treatment process, atmosphere protection is facilitated, temperature consistency is improved, product performance discreteness is reduced, and the beneficial effects of being high in heat treatment efficiency and good in toughness are achieved.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to Fe-Si-B-Nb-Cu iron-based amorphous / nanocrystalline soft magnetic alloy material and its preparation and heat treatment process. Background technique [0002] The iron-based nanocrystalline magnetic core is processed through a series of links such as formula design, base metal smelting, strip spraying, winding into rings, and heat treatment. With the rapid development of the field of power electronics, the requirements for magnetic materials are getting higher and higher, and the requirements for the functional properties of materials are becoming more and more special. With the rapid development of rail transit systems, safety monitoring systems, new energy vehicle power systems, wireless charging systems, etc., the demand for special soft magnetic materials such as high-power power electronic transformers, inductors, and reactances in the 1K-500K frequency band is i...

AI Technical Summary

Problems solved by technology

Since the master alloy needs to be directly smelted and sprayed into a complete amorphous structure, followed by a heat treatment process to form a new nanocrystalline grain structure, but the heat treatment temperature is 550-580 ° C, and the temperature range is relatively narrow. , so there is a problem that the grain grows faster; in order to control the crystallization point of the heat treatment process, copper atoms that promote crystallization and niobium elements that inhibit grain growth are added to play a certain role in the heat treatment process. The effect of controlling grain growth, but it greatly increases the cost of raw materials and other issues

[0006] (3) There is latent heat release in the process of heat treatment crystallization, and it is easy to cause the problem that the product performance is different due to the difference in heat treatment process, and the pass rate is unstable.

[0007] (4) Due to the aging of the heat treatment equipment, the vacuum condition becomes worse, and the surface oxidation phenomenon is also prone to occur, which has a more obvious impact on the performance of the magnetic core.

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