Method for manufacturing [mu]26 composite magnetic powder core
A technology of magnetic powder core and alloy powder, which is applied in the field of manufacturing magnetic permeability μ26 composite magnetic powder core, to achieve the effect of smooth powder, low eddy current loss and low cost
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Embodiment 1
[0023] Such as figure 1 The preparation process flow chart of the composite magnetic powder core, according to the mass ratio of mechanical sendust: gas atomized sendust: gas atomized sendust = 1:2:1, adding 1.0% of the mass of the alloy powder The phosphating solution is passivated to form a coating film on the surface of the alloy powder. Add 3% silicon oxide powder, 1% aluminum oxide (or mica powder), 2% sodium silicate, and 4% to the alloy powder in turn. Mix deionized water evenly, dry and sieve, add 0.5% zinc stearate, and use φ27.00×φ14.70×11.20 (that is, a ring with an outer diameter of 27.00mm, an inner diameter of 14.70mm, and a thickness of 11.20mm) Magnetic core) is molded with a pressure of 1600MPa (16T / cm2), and the molded magnetic powder core is kept in a nitrogen or argon environment at 720°C for 60 minutes for stress relief heat treatment, and finally coated with epoxy resin powder on the magnetic powder The surface of the core is sufficient. The physical ch...
Embodiment 2
[0028] Such as figure 1 The preparation process flow chart of the composite magnetic powder core, the proportion of alloy powder is according to the mass ratio of mechanical iron silicon aluminum: gas atomized iron silicon: gas atomized iron nickel molybdenum = 1:2:1, adding the equivalent of alloy powder The phosphating solution with a mass of 1.0% is passivated to form a coating film on the surface of the alloy powder, and 4% silicon oxide powder, 1% aluminum oxide (or mica powder), and 1.5% sodium silicate are added to the alloy powder in sequence , mix 4% deionized water evenly and dry and sieve, add 0.5% zinc stearate, use φ27.00×φ14.70×11.20 (that is, the outer diameter is 27.00mm, the inner diameter is 14.70mm, and the thickness is 11.20mm The ring core) is molded with a pressure of 1600MPa (16T / cm2), and the molded magnetic powder core is kept in a nitrogen or argon environment at 720°C for 60 minutes for stress relief heat treatment, and finally coated with epoxy resi...
Embodiment 3
[0033] Such as figure 1 The preparation process flow chart of the composite magnetic powder core, the proportion of the alloy powder is according to the mass ratio of mechanical FeSiAl: gas atomized FeSi = 4:6, and the phosphating solution equivalent to 1.0% of the mass of the alloy powder is added for passivation. Chemical treatment, forming a coating film on the surface of the alloy powder, adding 5% silicon oxide powder, 1% aluminum oxide (or mica powder), 2% sodium silicate, and 4% deionized water to the alloy powder, mix evenly and Dry and sieve, add 0.5% zinc stearate, and use φ27.00×φ14.70×11.20 (that is, a ring-shaped magnetic core with an outer diameter of 27.00mm, an inner diameter of 14.70mm, and a thickness of 11.20mm) in a mold The pressure of 1600MPa (16T / cm2) is used for compression molding, and the formed magnetic powder core is kept in a nitrogen or argon environment at 700°C for 70 minutes for stress relief heat treatment, and finally coated with epoxy resin ...
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