Technology for treating high-permeability annular iron core
A circular iron core and processing method technology, applied in the direction of inductance/transformer/magnet manufacturing, electrical components, circuits, etc., can solve the problems of long heating and cooling time, low sample pass rate, slow cooling speed, etc., and achieve the production process Simple, reasonable processing method, and the effect of improving the pass rate
Inactive Publication Date: 2003-11-19
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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Problems solved by technology
So far, the iron-based nanocrystalline alloys obtained high μ o Although articles on heat treatment methods and influencing factors have been introduced, there is no specific report on the batch heat treatment production method of this type of iron core
In the prior art, during the heat treatment and production of nanocrystalline alloy iron cores, due to the stacking of samples during the crystallization process of the iron core, the crystallization heat release exceeds the holding temperature, which reduces the pass rate of the samples and the batch scrap rate. increased
In addition, there is a method of sandwiching heat-conducting metal plates between samples to prevent exothermic over-temperature control during crystallization. Although this method is not easy to over-temperature, when the samples are cooled, the cooling rate is too slow, which is not conducive to the initial magnetic permeability μ of the samples. o In addition, the heating and cooling time is long, the sample is easy to oxidize, and the performance is reduced. Therefore, it can be seen from the above that in order to prevent the crystallization of the sample from overheating, a heat conduction plate is placed between the samples, especially for batch production of small sample cores. Improving product quality and product performance consistency cannot solve the problem
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Embodiment Construction
[0009] The embodiment of the method of the present invention uses Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The composition of the amorphous thin strip is tested. The test samples are placed in contact with each layer of the sample core in the circumferential surface. Depending on the number of samples, it can be placed on a single-layer or multi-layer sample holder. The thickness of the frame steel plate is 1.5-2mm. After entering the furnace, N should be used for heat treatment 2 As a shielding gas. In order to facilitate the comparison, we also used the existing technical processing method, and also used the above-mentioned comparative materials to conduct a comparative test. The comparative results are shown in Table 1. In Table 1, Nos. 1, 2, 3, and 4 are the treatment methods of brackets with different heating speeds, heat preservation times, interlayer heights, and steel plate thicknesses according to the treatment method of the present invention, according to samples of different sizes...
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Abstract
A heat treating method for high-permeability ring iron core, especially the nm crystal soft-magnetic one, features that in 20-500 deg.C range, the temp is raised up at 6-12 deg.C / min, in 500-560 deg.C range, the temp is raised up at 2-6 deg.C / min, and the products are arranged on a multi-layer carrier frame by a spacing distance which is 0.5-1.5 times greater than the height of product. Its advantages include simple process, high qualified rate of products and high heat treating effect.
Description
Technical field [0001] The method of the present invention belongs to the processing method of functional materials. Especially suitable for nanocrystalline soft magnetic toroidal cores in amorphous materials to obtain higher μ o The heat treatment method. Background technique [0002] Since the iron-based nanocrystalline soft magnetic alloy developed in the late 1980s, due to its good high-frequency performance, it has been more and more widely used in the fields of power and electronics. When used to make common-mode inductor cores, it is characterized by small sample size, large batch size and initial permeability μ o Higher. So far, the high μ value obtained by iron-based nanocrystalline alloys o Although the articles on heat treatment methods and influencing factors have been introduced, there are no specific reports on the mass heat treatment production methods of this type of iron core. In the prior art, for the heat treatment and production of nanocrystalline alloy iron c...
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Inventor 全白云周谦莉许妍
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD