阅读说明：本技术 一种铁基非晶合金带材的封装方法 (Packaging method of iron-based amorphous alloy strip ) 是由 朱正吼 白茹茹 于 2019-09-28 设计创作，主要内容包括：本发明涉及非晶态磁性材料领域,具体涉及一种铁基非晶合金带材的封装方法,铁基非晶合金带材除油清洗后,放入浓度为0.02-0.03mol/L CaSO<Sub>4</Sub>水溶液中,加热至25～85℃,保温30min～5hour；取出带材,烘干；最后将带材浸入环氧树脂中取出,得到封装好的铁基非晶合金带材。本发明提供的封装方法简单、方便,封装制备温度较低,反应时间短,界面结合力强,环氧树脂均匀粘在带材表面,树脂与合金带材表面浸润性良好。(The invention relates to the field of amorphous magnetic materials, in particular to a packaging method of an iron-based amorphous alloy strip, wherein the iron-based amorphous alloy strip is put into CaSO with the concentration of 0.02-0.03mol/L after being degreased and cleaned 4 Heating the mixture to 25-85 ℃ in the aqueous solution, and keeping the temperature for 30 min-5 hours; taking out the strip and drying; and finally, immersing the strip into epoxy resin and taking out to obtain the packaged iron-based amorphous alloy strip. The packaging method provided by the invention is simple and convenient, the packaging preparation temperature is lower, the reaction time is short, the interface bonding force is strong, the epoxy resin is uniformly adhered to the surface of the strip, and the surface wettability of the resin and the alloy strip is good.)

1. The packaging method of the iron-based amorphous alloy strip is characterized by comprising the following steps:

(1) after removing oil on the surface of the iron-based amorphous alloy strip, cleaning and drying;

(2) putting the strip into CaSO with the concentration of 0.02-0.03mol/L₄In the water solution, heating the water solution to 25-85 ℃, and preserving the temperature for 30 min-5 hours to turn the surface of the alloy strip into light yellow;

(3) taking out the strip, and drying the strip in an air environment at the temperature of less than or equal to 100 ℃;

(4) and (4) immersing the belt material into epoxy resin, and uniformly adhering the epoxy resin to the surface of the belt material to finish the packaging.

2. The method for packaging the iron-based amorphous alloy strip according to claim 1, wherein the surface of the strip is degreased and is washed by absolute ethyl alcohol and NaOH aqueous solution sequentially.

3. The method for packaging the iron-based amorphous alloy strip as claimed in claim 1, wherein the iron-based amorphous alloy is Fe_73.3Cu₁Nb₃Si_13.5B₉Or Fe₇₈Si₁₃B₉。

4. The method for encapsulating iron-based amorphous alloy strip according to claim 1, wherein the CaSO₄The solubility of the aqueous solution was 0.025 mol/L.

5. The method for packaging the iron-based amorphous alloy strip according to claim 1, wherein the temperature of the hot aqueous solution is heated to 60-85 ℃ in the step (2), and the temperature is kept for 30-60 min.

Technical Field

The invention relates to the field of amorphous magnetic materials, in particular to a packaging method of an iron-based amorphous alloy strip.

Background

The amorphous alloy has excellent mechanical and functional characteristics, and is a novel metal material with wide application potential. The magnetic material has attracted more and more attention because of its unique organization structure, excellent soft magnetic performance, efficient preparation process and low cost. Compared with the traditional soft magnetic materials of MnZn ferrite and permalloy, the iron-based amorphous alloy has the advantages of high magnetic conductivity, high saturation magnetic induction, low coercive force, low iron loss, good thermal stability and the like, is beneficial to promoting the miniaturization and the lightening of electronic products, and is widely applied to the electronic fields of transformers, filter inductors, mutual inductors, sensors and the like. At present, energy conservation and emission reduction are vigorously advocated, and the iron-based amorphous/nanocrystalline alloy as a green functional material has wider application space.

At present, the iron-based amorphous alloy strip is generally obtained mainly by a single-roll method, is in a metastable structure thermodynamically, and has unsatisfactory performance in all aspects in a quenching state. A large number of researches show that the heat treatment process has great influence on the soft magnetic property of the iron-based amorphous alloy, and after proper annealing treatment, part of amorphous state in the alloy is converted into more stable crystalline state, so that the soft magnetic property is greatly improved. However, the strip material after heat treatment has the defects of large brittleness, easily influenced performance by external force and the like, and the main component of the material is iron, so the strip material is easily rusted in a humid environment to further influence the appearance and the performance of the strip material. In the actual production process, the epoxy resin packaging is usually carried out and then the epoxy resin packaging is put into use. However, the surface activity of the material is not high, and a serious non-wetting problem exists in the packaging process, so that the ideal packaging effect cannot be achieved.

In order to solve the problem, NaOH and NaNO are used in the prior art₃Preparing a main component Fe on the surface of the iron-based amorphous alloy strip as an oxidizing solution₃O₄The transitional coating has strong environmental resistance and solves the problem of non-infiltration in the packaging process. But the coating has the defects of higher preparation temperature, long reaction time, weak interface bonding force and the like.

Disclosure of Invention

The invention aims to provide a packaging method of an iron-based amorphous alloy strip, which improves the wettability between the iron-based amorphous alloy and epoxy resin, effectively solves the problem of connection between the amorphous alloy and the epoxy resin, and lays a good foundation for the application of the amorphous alloy in the aspect of sensors. The method can solve the problems of high preparation temperature, long reaction time and weak interface bonding force of the iron-based amorphous alloy packaging method in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that:

(1) the surface of the iron-based amorphous alloy strip is washed by absolute ethyl alcohol and NaOH aqueous solution in sequence;

(2) putting the strip into CaSO with the concentration of 0.02-0.03mol/L₄In the water solution, heating the water solution to 25-85 ℃, and preserving the temperature for 30 min-5 hours to turn the surface of the alloy strip into light yellow;

(3) taking out the strip, and drying the strip in an air environment at the temperature of less than or equal to 100 ℃;

(4) and (4) immersing the belt material into epoxy resin for extraction, uniformly adhering the epoxy resin to the surface of the belt material, and finishing packaging.

Further, the iron-based amorphous alloy is Fe_73.3Cu₁Nb₃Si_13.5B₉Or Fe₇₈Si₁₃B₉。

Further, the CaSO₄The solubility of the aqueous solution was 0.025 mol/L.

Further, in the step (2), the temperature of the hot water solution is heated to 60-85 ℃, and the temperature is kept for 30-60 min.

Compared with the prior art, the invention has the beneficial effects that:

the method of the invention uses CaSO₄The method has the advantages that the reaction area can be formed by processing the iron-based amorphous alloy by the aqueous solution, the method is simple, the packaging preparation temperature is low, the reaction time is short, the interface bonding force is strong, the epoxy resin is uniformly adhered to the surface of the strip, and the wettability of the resin and the surface of the alloy strip is good.

Drawings

FIG. 1 shows the surface changes of FeCuNbSiB alloy before and after treatment, wherein (a) shows the surface appearance of an untreated strip and (b) shows the surface appearance of a treated strip;

FIG. 2 shows Fe at 25 ℃₇₈Si₁₃B₉The microscopic morphology of the strip in different treatment times is shown, wherein a is 0min, b is 30min, and c is 60 min;

FIG. 3 is Fe at 85 DEG C₇₈Si₁₃B₉The microscopic morphology of the strip in different treatment times is shown, wherein a is 30min, and b is 60 min;

FIG. 4 shows Fe at 25 ℃_73.3Cu₁Nb₃Si_13.5B₉The microscopic morphology of the strip in different processing times is shown, wherein a is 0min, and b is 5 hours;

FIG. 5 shows Fe at 85 ℃_73.3Cu₁Nb₃Si_13.5B₉The microscopic appearance of the strip after 60min of treatment;

fig. 6 is a diagram showing the effect of dipping the surface-treated strip material in epoxy resin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.