A high-stability bias plate, its manufacturing method and acousto-magnetic anti-theft label made of it

A technology with high stability and manufacturing method, applied in the field of offset sheets, to achieve the effects of simple and reliable storage and transportation, convenient processing and improved stability

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

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Problems solved by technology

[0006] The content of the present invention is to provide a low-coercivity bias sheet with low price and stable magnetic properties and an acoustomagnetic anti-theft label made of it; at the same time, the invention also discloses the production of a high-stability bias sheet The method can overcome the high requirements on the process and production equipment during the production of the existing low coercive force bias sheet

Method used

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  • A high-stability bias plate, its manufacturing method and acousto-magnetic anti-theft label made of it
  • A high-stability bias plate, its manufacturing method and acousto-magnetic anti-theft label made of it
  • A high-stability bias plate, its manufacturing method and acousto-magnetic anti-theft label made of it

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The alloy material (containing 7wt% Mn, 0.5wt% Co, 0.3wt% Cr, and the balance is Fe) is melted and cast into an ingot, hot forged, hot rolled to 5mm, the surface oxide layer is removed, and then cold rolled to 0.4mm, 840 ℃ rapid softening treatment in the single-phase zone to prevent excessive oxidation, and then directly cold-rolled to 0.06mm with a 4-high rolling mill, placed in a vacuum furnace at 520℃ / 4 hours in the dual-phase zone after aging, and slit into different coils with a width of 4.5mm , and then cut the coil into 38 mm long bias sheet with a high-speed shearing machine. The typical magnetic properties of the Fe-Mn-based alloy bias sheet are shown in Table 1.

[0028] The manufacturing method of the above-mentioned offset sheet can also be carried out through the following process steps: the alloy material is melted, cast ingot, hot-rolled and opened, the surface of the billet is ground, softened above 800 ° C, and rolled by a 6-roll cold rolling mill. Aft...

Embodiment 2

[0034] The difference between this example and Example 1 is that the alloy material (containing 8wt% Mn, 1.0wt% Co, 0.3wt% Cu, and the balance is Fe) is melted and cast into an ingot, hot forged, hot rolled to 5mm, and removed The surface is then cold-rolled to 0.4mm, rapidly softened in the single-phase zone at 840°C, then cold-rolled to 0.065mm with a 4-roll rolling mill, placed in a vacuum furnace at 560°C / 3 hours in the dual-phase zone, and slit into 6 Different coils of millimeter width, 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 Fe-Mn-based alloy bias sheet are shown in Table 1.

[0035] 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 figure 2 shown. The available tag amplitude is higher (at the effective reson...

Embodiment 3

[0037] The difference between this example and Example 1 or 2 is that the alloy material (containing 8wt% Mn, 1.2wt% Co, 0.3wt% Ti, and the balance is Fe) is melted and then cast into an ingot, hot forged, and cast into an ingot after melting , hot forging, hot rolling to 5mm, surface cleared and then cold rolled to 0.4mm, rapid softening treatment in single phase zone at 840°C, then directly cold rolled to 0.08mm with a 4-roll rolling mill, placed in a vacuum furnace at 590°C / 1 hour double After phase-zone aging, slitting into different coils with a width of 6 mm, and then the coils are cut into 38 mm long offset sheets with a high-speed shear. Then its magnetic properties were tested. The typical magnetic properties of the Fe-Mn-based alloy bias sheet are shown in Table 1.

[0038] The typical magnetic properties of the Fe-Mn-based alloy bias plate obtained by the embodiment 1-3 of table 1

[0039] Example aging temperature Prescription time Hc Br Bs Br / B...

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Abstract

The invention relates to the technical field of offset sheet, in particular to an offset sheet with high stability, a manufacturing method of the offset sheet and an acoustic-magnetic anti-theft labelmade by using the offset sheet. The high-stability offset sheet is obtained by conducting aging heat treatment at the temperature of 450 DEG C or above on an alloy cold-rolled strip for 20 minutes orabove, wherein the alloy cold-rolled strip is composed of 6wt% to 9.5wt% of Mn, 0. 3wt% -3wt% of Co, not more than 8wt% of other one or more transition group metals, and the balance Fe; the thicknessof the offset sheet ranges from 0.05 mm to 0.12 mm, the direct-current magnetic characteristic is the residual magnetism of 8500 Gs to 14500 Gs, and the coercive force is 15 Oe to 38 Oe. The high-stability offset sheet has relatively high residual magnetism, so that the magnetic energy is stable, the high-stability offset sheet is very suitable for the acoustic-magnetic label, it is proved that the offset sheet with a stable offset magnetic field can be obtained by using the low-price alloy taking Fe and Mn elements as a base by means of the steps of the method.

Description

technical field [0001] The invention relates to the technical field of bias sheets, in particular to a high-stability bias sheet, a manufacturing method thereof and an acoustomagnetic anti-theft label made from the same. Background technique [0002] The existing low-coercivity semi-hard magnetic bias sheet strip FeNiAlTi or FeNiMo has a coercivity of 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, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/10C22C38/14C22C38/16C22C38/30C22C38/38G08B13/24C21D8/12C21D1/26
CPCC21D1/26C21D8/1233C21D8/1244C22C38/04C22C38/10C22C38/14C22C38/16C22C38/30C22C38/38G08B13/2422G08B13/2442
Inventor 李选明虞维扬
Owner 浙江南德精密合金有限公司
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