Insulation treatment method of iron-nickel-molybdenum alloy soft magnetic material

Abstract

The invention discloses an insulation treatment method of an iron-nickel-molybdenum alloy soft magnetic material, belongs to the technical field of magnetic materials, aims to solve the problem of high eddy current loss caused by large particle size of powder prepared by an original material preparation technology, and provides an insulation treatment method of an iron-nickel-molybdenum alloy soft magnetic material. The method comprises the following steps: mixing an iron block, a nickel block and a molybdenum block according to a mass percentage; adding the raw materials into an atomizing furnace, and presetting a preset temperature and a heating duration; preparing iron-nickel-molybdenum alloy soft magnetic powder with high magnetic conductivity by adopting an atomizing method in the atomizing furnace; and putting tetraethyl orthosilicate into a mortar, mixing for 10-30 minutes, and drying at 60-90 DEG C for 2-4 hours to obtain the iron-nickel-molybdenum alloy soft magnetic material. According to the invention, the atomizing angle of the nozzle of the gasification furnace is designed, the effect is to accelerate airflow while it is guaranteed that the airflow at an outlet of a contraction section is uniform, straight and stable, the nozzle generates the laminar flow effect, the particle size of atomized powder is finer, water atomization is designed to impact a film and gas atomization is designed to conduct secondary homogenization and shaping, and the high-magnetic-conductivity annular magnetic powder core is prepared.

Description

technical field

[0001] The invention belongs to the technical field of magnetic materials, and in particular relates to an insulation treatment method for an iron-nickel-molybdenum alloy soft magnetic material. Background technique

[0002] The shape of the soft magnetic crushing powder is irregular, the preparation is small, the magnetic permeability is high, and the frequency stability of the magnetic core magnetic permeability is good, but the insulation coating is poor and it is not easy to cover; the spherical powder prepared by the gas atomization technology has strong fluidity, and the finished product High efficiency, but the spherical powder has large eddy current loss and low magnetic permeability; the powder prepared by gas atomization has high sphericity, good surface, few satellite particles adhered, and the powder particle size distribution is uniform, but the gas pressure is limited, so it can only prepare particles Powder with large diameter will cause proble...

Examples

Embodiment 1

[0030] Such as figure 1 and figure 2 As shown, an insulation treatment method of an iron-nickel-molybdenum alloy soft magnetic material,

[0031] S1: Mix iron, nickel and molybdenum evenly according to the mass percentage of 17:82:2;

[0032] S2: After mixing evenly, put it into the atomization furnace, set the temperature at 1500-1800°C, heat for 2-3 hours, and prepare it by high-pressure air-water combined atomization method under the pressure of 1-6Mpa, and make it with high magnetic permeability Iron-nickel-molybdenum alloy soft magnetic powder; the specific temperature is controlled at 1700°C;

[0033] S3: The iron-nickel-molybdenum alloy soft magnetic powder is screened to select material A, A is a magnetic powder with a particle size of 10-22 μm; the magnetic powder with a particle size of 20 μm has the best uniform insulation coating effect;

[0034] S4: Put the screened material A and tetraethyl orthosilicate into a mortar and mix for 10-30 minutes; obtain materia...

Embodiment 2

[0038] This embodiment is carried out on the basis of the above-mentioned embodiments, and the ammonia solution with a mass fraction of 2 to 3% is prepared, and then 0.05 mol of cobalt chloride is added for every 250 to 300 ml of the ammonia solution, and then every 0.01 mol of cobalt chloride is added to the aforementioned solution. Add 100g of iron-nickel-molybdenum alloy soft magnetic powder to mol of cobalt chloride, stir evenly, put the above materials into a hydrothermal reaction kettle, keep warm at 170-190°C for 1-2 hours, then cool naturally to room temperature, filter with suction and wash twice with alcohol After the above, put it into an oven for drying at 50-70°C to obtain the coated magnetic powder; it is the process of cleaning and purifying the soft magnetic powder of iron-nickel-molybdenum alloy to strengthen the structural compactness of the subsequent magnetic core, and through hydrolysis Precipitation insulation coating method to improve the insulation effec...

technical field

[0001] The invention belongs to the technical field of magnetic materials, and in particular relates to an insulation treatment method for an iron-nickel-molybdenum alloy soft magnetic material. Background technique

[0002] The shape of the soft magnetic crushing powder is irregular, the preparation is small, the magnetic permeability is high, and the frequency stability of the magnetic core magnetic permeability is good, but the insulation coating is poor and it is not easy to cover; the spherical powder prepared by the gas atomization technology has strong fluidity, and the finished product High efficiency, but the spherical powder has large eddy current loss and low magnetic permeability; the powder prepared by gas atomization has high sphericity, good surface, few satellite particles adhered, and the powder particle size distribution is uniform, but the gas pressure is limited, so it can only prepare particles Powder with large diameter will cause proble...

Examples

Embodiment 1

[0030] Such as figure 1 and figure 2 As shown, an insulation treatment method of an iron-nickel-molybdenum alloy soft magnetic material,

[0031] S1: Mix iron, nickel and molybdenum evenly according to the mass percentage of 17:82:2;

[0032] S2: After mixing evenly, put it into the atomization furnace, set the temperature at 1500-1800°C, heat for 2-3 hours, and prepare it by high-pressure air-water combined atomization method under the pressure of 1-6Mpa, and make it with high magnetic permeability Iron-nickel-molybdenum alloy soft magnetic powder; the specific temperature is controlled at 1700°C;

[0033] S3: The iron-nickel-molybdenum alloy soft magnetic powder is screened to select material A, A is a magnetic powder with a particle size of 10-22 μm; the magnetic powder with a particle size of 20 μm has the best uniform insulation coating effect;

[0034] S4: Put the screened material A and tetraethyl orthosilicate into a mortar and mix for 10-30 minutes; obtain materia...

Embodiment 2

[0038] This embodiment is carried out on the basis of the above-mentioned embodiments, and the ammonia solution with a mass fraction of 2 to 3% is prepared, and then 0.05 mol of cobalt chloride is added for every 250 to 300 ml of the ammonia solution, and then every 0.01 mol of cobalt chloride is added to the aforementioned solution. Add 100g of iron-nickel-molybdenum alloy soft magnetic powder to mol of cobalt chloride, stir evenly, put the above materials into a hydrothermal reaction kettle, keep warm at 170-190°C for 1-2 hours, then cool naturally to room temperature, filter with suction and wash twice with alcohol After the above, put it into an oven for drying at 50-70°C to obtain the coated magnetic powder; it is the process of cleaning and purifying the soft magnetic powder of iron-nickel-molybdenum alloy to strengthen the structural compactness of the subsequent magnetic core, and through hydrolysis Precipitation insulation coating method to improve the insulation effec...

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