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Semi-hard magnetic material as well as preparation method and application thereof

A semi-hard magnetic and versatile technology, applied in the direction of magnetic materials, manufacturing tools, magnetic objects, etc., can solve the problems of bias magnetic sheets that are not suitable for acoustic and magnetic anti-theft labels, complicated processing technology, and high aluminum content, so as to achieve the reduction of aluminum content, Effect of reducing peeling phenomenon and improving yield

Active Publication Date: 2010-11-10
北京信中仁新材料技术公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent US4536229 proposes FeNiMo semi-hard magnetic material to make the bias magnetic sheet of the above-mentioned acoustomagnetic anti-theft mark, Chinese patent 200610052012.4 proposes to use FeNi soft magnetic material to make the bias magnetic sheet of the above-mentioned acousto-magnetic anti-theft mark, and U.S. Patents US6663981 and US6803118 propose FeNiAlTi semi-hard magnetic material is used to make the bias magnetic sheet of the acoustomagnetic anti-theft label as described above. The acoustomagnetic label bias magnetic sheet described in these patents has certain restrictions, such as: Patent 200610052012.4 proposes to use FeNi soft magnetic material to make the above The bias magnetic sheet of the acoustomagnetic anti-theft label, because the coercive force Hc is too small to cause the bias magnetic field Hd is too low, is not suitable for the bias magnetic sheet of the acoustomagnetic anti-theft label
Patents US6663981 and US6803118 have high cost due to high aluminum content and complicated processing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Semi-hard magnetic material alloy composition Fe 84.17 Ni 14.5 Al 0.6 Ti 0.45 Mn 0.28 , After the hot-rolled billet is opened by vacuum melting, the first cold-rolling is carried out, and the cold-rolling deformation is 66%. The steel strip after the first cold rolling is subjected to hydrogen protection continuous annealing treatment, the annealing temperature is 1050 ℃, and the annealing speed is 1.8 meters per minute. The annealed steel strip is cold rolled for the second time, and the cold rolling deformation amount is 96%, and it is rolled into a steel strip with a width of 100 mm and a thickness of 0.055 mm. The final heat treatment is carried out in a nitrogen protective atmosphere, the heat treatment temperature is 650 ℃, and the heat treatment speed is 1.5 meters per minute. The heat-treated steel strip is cut into a long strip with a length of 31mm and a width of 6mm to make a bias magnetic piece of the acousto-magnetic label. The coercive force Hc of th...

Embodiment 2

[0023] Semi-hard magnetic material alloy composition Fe 83.75 Ni 14.5 Al 0.9 Ti 0.5 Mn 0.35 , After the hot-rolled billet is opened by vacuum melting, the first cold-rolling is carried out, and the cold-rolling deformation is 66%. The steel strip after the first cold rolling is subjected to hydrogen protection continuous annealing heat treatment, the annealing temperature is 1050 ℃, and the annealing speed is 1.8 meters per minute. The annealed steel strip was cold rolled for the second time, and the cold rolling deformation amount was 97%, and it was rolled into a steel strip with a width of 100 mm and a thickness of 0.05 mm. The final heat treatment is carried out under nitrogen protective atmosphere, the heat treatment temperature is 640 ℃, and the heat treatment speed is 1.2 meters per minute. The heat-treated steel strip is cut into a long strip with a length of 31mm and a width of 6mm to make a bias magnetic piece of the acousto-magnetic label. The coercive force H...

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Abstract

The invention relates to a semi-hard magnetic material which comprises alloy components of FeaNibAlcTidMne, wherein a, b, c, d and e are atomic percentages; and the change ranges are as follows: b is not less than 10 and not more than 20, c is not less than 0 and not more than 1.0, d is not less than 0 and not more than 1.0, e is not less than 0 and not more than 1.0, and a is equal to 100-b-c-d-e. The preparation method comprises the following steps of: carrying out vacuum melting and hot-rolling blooming on the alloy components, then carrying out cold rolling and continuous annealing treatment, wherein the first cold rolling deflection is 60-80 percent; then carrying out second cold rolling, and rolling into a steel belt with the thickness of 0.05-0.06 mm, wherein the cold rolling deflection is 95-99 percent; and carrying out gas-protective continuous heat treatment as final heat treatment to prepare the semi-hard magnetic material product. The detailed preparation method is shown as a specification. The semi-hard magnetic material is mainly used for manufacturing an offset magnetic sheet of an acoustic-magnetic anti-theft tag, and the offset magnetic sheet is used for an anti-theft tag of a magnetic-machine type electronic article anti-theft system and achieves the aims of activating the alarm and deactivating unalarmed tags.

Description

technical field [0001] The present invention relates to a semi-hard magnetic material in a label used in an electronic commodity anti-theft system, in particular, the present invention relates to a semi-hard magnetic material, a preparation method and use thereof Background technique [0002] As we all know, electronic product anti-theft system has been widely used in hypermarkets, commodity supermarkets, libraries and various specialty stores. Twenty-five years ago, US patents US4510489 and US4510490 proposed an electronic product anti-theft system based on the magneto-mechanical elastic resonance method. The system consists of detection gates (transmitters and receivers) and labels (sensors). The detection door is placed at the entrance and exit passages of shopping malls and supermarkets to form a detection area, and the label is placed on the commodity. When the commodity with the label passes through the detection area, the detection door sends an alarm signal to preve...

Claims

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Application Information

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IPC IPC(8): H01F1/047C21D9/52C21D1/26
Inventor 张建国徐廷浩
Owner 北京信中仁新材料技术公司