Amorphous alloy magnetic strip applied to anti-theft sensing and preparation method thereof

Abstract

The invention discloses an amorphous alloy magnetic strip for anti-theft sensing with higher toughness and sensitivity, stronger corrosion resistance and easy implementation and a preparation method thereof. The ratio of each element in the alloy composition is: iron 35‑60at%, nickel 15‑40at%, boron 10‑20at%, manganese or molybdenum 1‑10at%, rare earth 0.5‑2at%, and satisfies iron at%+nickel at% %+boron at%+manganese or molybdenum at%+rare earth at%=100%. Its preparation method is to put the alloy steel ingot composed of the above components into a vacuum furnace and refine it under a vacuum degree and temperature to make a corresponding alloy steel ingot; , sprayed at a certain constant pressure onto the surface of a copper roller rotating at a line speed of 20‑35 m / s, and then continuously prepares an alloy thin strip of a certain thickness at one time; heat-treating the alloy thin strip to obtain a Sensitive amorphous alloy magnetic strip.

Description

technical field [0001] The invention belongs to the technical field of preparation of amorphous alloys, and in particular relates to an amorphous alloy magnetic strip applied to anti-theft sensing and a preparation method thereof. Background technique [0002] With the development of open service methods such as supermarkets and libraries, anti-theft measures for objects have been sharply strengthened, and access control electronic anti-theft systems have also gained rapid popularity. Whether the access control electronic anti-theft system adopts the harmonic mode or the audio mode, etc., the key sensitive component of the anti-theft sensing magnetic strip must be used. The anti-theft sensing magnetic strip is concealed in the object. When the magnetic strip passes through the access control channel with the object, the access control detection unit will send out an alarm when it detects a specific frequency wave generated by the magnetic strip. In order to reduce the false...

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Problems solved by technology

Although the iron-based amorphous magnetic strip has a large magnetostriction coefficient, its toughness is poor and it is easy to break. It is difficult to avoid the damage of its magnetic properties by mechanical external force. The area affected by the humid environment is prone to corrosion and rust

[0005] In recent years, the research and development of iron-nickel-based amorphous alloy magnetic strips has become a hot spot, and some progress has been made, but most of them focus on high-nickel amorphous with nickel content ≥ at50%, which has good toughness and strong corrosion resistance, but the magnetic permeability However, the rate and hysteresis expansion coefficient have declined, and the price is still high, which affects its popularization and application.

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