Nano-crystal soft magnetic iron core, heat treatment method and application thereof

Abstract

The invention relates to nanometer crystal soft magnet core. It includes the cyclic magnet core with 0.027-0.03mm thickness. Its magnet core alloy constituent atom percentages are as follows: Fe 67-80, Ni or Co or Ni and Co 0.1-0.6, Nb 2-4, Cu 0.5-1.5, Si 10-17, and B 6-10. It replaces Ni or Co by Fe to process better initial permeability and 0.5-0.85 magnetic performance ratio. The heat treatment can make the magnet core reach optimal efficiency which can be used in electromagnetic residual current protective circuit breaker and current voltage transformer.

Description

technical field [0001] The invention relates to an iron core made of soft magnetic material, in particular to a nanocrystalline soft magnetic core and a heat treatment method and application thereof. Background technique [0002] Nanocrystalline soft magnetic material is the first amorphous material obtained by the process of preparing amorphous strips. After heat treatment, its microstructure forms 20nm crystallites, so it is called ultrafine crystal material or nanocrystalline soft magnetic material. In nanocrystalline Before the discovery of soft magnetic materials, the commonly used soft magnetic materials were silicon steel, permalloy, ferrite and amorphous alloys. It is used in switching power supply, electric power, electronic instruments, and instrumentation industries. While it plays an important role, it also has its own shortcomings. For example, silicon steel has high saturation magnetic induction, but its effective permeability value is low, especially It is in...

AI Technical Summary

Problems solved by technology

So far, no report has been reported to obtain an iron core with a maximum magnetic permeability of μm>1,100,000 and μi>40,000 and a μi / μm of 0.5 to 0.85 by heat treatment of NbCuFeSiB alloy.