A kind of bias plate, its manufacturing method and acoustic magnetic anti-theft label made of it

A manufacturing method and technology for biasing sheets, applied in the field of biasing sheets, can solve the problems of limited use of biasing sheets, unfavorable collocation, difficulty in label demagnetization, etc. Effect

Active Publication Date: 2021-01-19
浙江南德精密合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to stably produce the bias film, in 2014, the patent CN102298815 B of Ningbo Xunqiang Electronic Technology Co., Ltd. disclosed a high coercive force bias film, although the ability to resist the environmental interference magnetic field during transportation, storage and use is relatively high , but the high coercivity bias sheet is not conducive to the matching of other components in label production, and the produced label is difficult to demagnetize, which greatly limits the use of this type of bias sheet

Method used

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  • A kind of bias plate, its manufacturing method and acoustic magnetic anti-theft label made of it
  • A kind of bias plate, its manufacturing method and acoustic magnetic anti-theft label made of it
  • A kind of bias plate, its manufacturing method and acoustic magnetic anti-theft label made of it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The alloy material (containing 8wt% Co, 20.5wt% Cr, 0.5wt% Ni, and the balance is Fe) is melted, cast ingot, hot-rolled and hot-rolled to 5mm, and the surface of the billet is ground to remove the surface oxide layer, and then Cold rolling to 0.4mm, rapid softening treatment in the single-phase zone at 850°C to prevent excessive oxidation, then direct cold rolling to 0.06mm with a 4-roll or 6-roll mill, and aging in the dual-phase zone at 540°C / 6 hours in a vacuum furnace , slit into different coils with a width of 4.5 mm, and then cut the coils into bias plates with a length of 26.5 mm to 40 mm with a high-speed shearing machine. The typical magnetic properties of the alloy bias plates are shown in Table 1 .

[0029] Assemble the bias sheet of this example to obtain an acoustomagnetic anti-theft tag, and perform a frequency sweep test on 108 (36 pieces*3 groups) of acoustomagnetic anti-theft tags to obtain a frequency drift table figure 1 , figure 2 shown. figure 1...

Embodiment 2

[0032] The difference between this example and Example 1 is that the alloy material (containing 8.5wt% Co, 21.5wt% Cr, 0.3wt% Cu, and the balance is Fe) was melted and cast into an ingot, hot forged, hot rolled to 5mm, Clean the surface and then cold roll to 0.4mm, 850°C single-phase zone rapid softening treatment, then use a 4-high rolling mill to press and cold-roll to 0.065mm, put it in a vacuum furnace at 580°C / 5 hours after aging in the dual-phase zone, and slit into Different coils with a width of 6 mm, and then the coils are cut into 36 mm long offset sheets with a high-speed shear. Then its magnetic properties were tested. The typical magnetic properties of the alloy bias sheet are shown in Table 1.

[0033] The bias sheet prepared in this embodiment is assembled to obtain an acoustomagnetic anti-theft label, and the test sample label is subjected to an amplitude test to obtain an amplitude such as image 3 shown. The acoustomagnetic anti-theft tag assembled with the...

Embodiment 3

[0035] The difference between this example and Example 1 or Example 2 is that the alloy material (containing 10.5wt% Co, 22wt% Cr, 0.5wt% Ti, and the balance is Fe) is melted and cast into an ingot, hot forged, and after smelting Ingot casting, hot forging, hot rolling to 5mm, cleared surface and then cold rolling to 0.4mm, rapid softening treatment in single-phase zone at 850°C, then direct cold rolling to 0.08mm with a 4-roll rolling mill, placed in a vacuum furnace at 605°C / 1.5 After aging in the two-phase zone for 1 hour, slitting into different coils with a width of 6 mm, and then cutting the coils into 38 mm long offset sheets with a high-speed shear. Then its magnetic properties were tested. The typical magnetic properties of the alloy bias sheet are shown in Table 1.

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Abstract

The invention relates to the technical field of polarization sheets, in particular to ingredients, performance and a manufacturing method of a polarization sheet. The polarization sheet provided by the invention is prepared from 7 to 11 weight percent of Co, 20 to 23 weight percent of Cr and no more than 8 weight percent of other one or several kinds of transition group metal Fe alloy cold rolledbands through time aging heat treatment for 30 minutes or more at a temperature of 460 DEG C or more; the thickness is 0.05 to 0.12mm; the direct current magnetic features are residual magnetism 10000Gs to 14500Gs; the coercive force is 15 Oe to 38 Oe. The FeCrCo alloy is made into the polarization sheet with the features of optimum coercive force, high residue magnetism, high rectangular ratio and the like; the polarization sheet can be perfectly applied to acoustic magnetic label products; the technical problem that the polarization material with the high coercive force cannot be easily magnetized or demagnetized is solved; the polarization sheet is applicable to high-end labels.

Description

technical field [0001] The invention relates to the technical field of bias sheets, in particular to a method for manufacturing the bias sheet and an acoustomagnetic anti-theft label made thereof. Background technique [0002] The coercive force of the existing semi-hard magnetic bias strip FeNiAlTi or FeNiMo is 20 0e, which requires extremely strict control of the aging temperature / time after cold rolling. Because the aging process of this type of alloy is a process of rising coercive force from low to high, low coercive force is an earlier state of rapid rise in Hc at the beginning of aging, and is extremely sensitive to aging temperature, and you will miss the impact if you are not careful. The target process window where Hc is about 20 0e makes Hc rise too high and scrap the entire furnace thin steel strip, which has extremely high requirements for production equipment. [0003] In order to stably produce the bias film, in 2014, the patent CN102298815 B of Ningbo Xunqia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/30C21D9/52H01F1/047H01F41/02
CPCC21D9/52C22C38/30H01F1/047H01F41/0253
Inventor 李选明辅超超
Owner 浙江南德精密合金有限公司
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