Iron-based amorphous/carbon nanotube composite material for low-loss and high-corrosion-resistance transformer iron core and preparing method and application of iron-based amorphous/carbon nanotube composite material

Abstract

The invention discloses an iron-based amorphous/carbon nanotube composite material for a low-loss and high-corrosion-resistance transformer iron core and a preparing method and application of the iron-based amorphous/carbon nanotube composite material. The material comprises 98.5 wt%-99.5 wt% of an iron-based amorphous structure and 0.5 wt%-1.5 wt% of a carbon nanotube. The iron-based amorphous structure comprises following components including, by weight percent, 28 wt% of Cr, 3 wt% of B, 6 wt% of Si, 4 wt% of P, 5 wt% of Ni, 8 wt% of Mo 3wt% of Nb, and the balance Fe. The carbon nanotube isprepared through a chemical vapor deposition method. Firstly, raw materials for preparing the iron-based amorphous structure are added into a vacuum gas atomization furnace to be smelted and atomized,powder screening is conducted, then, 304 stainless steel is adopted for wrapping the powder, and a wire is formed. According to application of the finished wire to preparing of iron-based amorphous/carbon nanotube composite electromagnetic shielding materials, the rapid quenching technology is adopted for preparing an amorphous strip, and two spraying ports are adopted in the rapid quenching process for continuous and uniform spraying of the iron-based amorphous structure and the carbon nanotube. The prepared composite material is low in loss, high in energy efficiency and good in corrosion resisting performance, and wide application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to an iron-based amorphous / carbon nanotube composite material and its preparation method and application. Background technique [0002] Reducing the power distribution loss of the power system and improving the efficiency of the power system have always been a common concern in all countries in the world. As the transformer is one of the largest components in the power system, reducing its loss index is of great significance to improve the power distribution efficiency of the power system. A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. It mainly consists of two parts: an iron core and a coil. In a transformer, the choice of core material has a decisive effect on the energy consumption of the transformer. [0003] Since iron-based amorphous materials do not have a long-range ordered structure, their magnetization a...

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Problems solved by technology

However, carbon nanotubes have a strong nano-agglomeration effect due to their small size, so their dispersion in amorphous materials is poor. The existing dispersion process may make it difficult to uniformly disperse in amorphous materials, or the process operation is relatively complicated.

In addition, with the development of science and technology, the application environment of transformers is becoming increasingly complex, and the performance of transformer cores in offshore or coastal areas is often gradually reduced due to severe corrosion damage.

Chromium is a beneficial element to improve the corrosion resistance of metal materials, but the existing iron-based amorphous materials usually contain less chromium in order to obtain higher amorphous forming ability.

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