High silicon steel soft magnet core based on laser sintering 3D printing and preparation method thereof
A 3D printing and laser sintering technology, applied in the manufacture of inductors/transformers/magnets, improvement of process efficiency, additive manufacturing, etc., can solve problems such as large eddy current losses, achieve reduced operating radius, good dispersion, and prolong service life Effect
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Embodiment 1
[0032] First mix 85wt% high-silicon-iron-silicon alloy powder, 1wt% silicon powder, 0.4wt% ammonium chloride powder and 13.6wt% silicon dioxide powder evenly, and then conduct heat treatment under the protection of argon, so that the high Silicon ferrosilicon alloy powder is subjected to siliconizing treatment, the siliconizing heat treatment temperature is 800°C, and the holding time is 0.5h; then at 300°C, under air conditions, oxidation treatment for 5h, magnetic separation, to obtain high-silicon iron-silicon alloy composite powder , using it as a raw material for laser sintering 3D printing. The ring blank is prepared by laser sintering 3D printing. The scanning method of 3D printing adopts orthogonal scanning. The ring blank was ultrasonically cleaned for 10 minutes, and the blank was dried at 80°C. Then, vacuum annealing is performed on the dried green body, the annealing heat treatment temperature is 500°C, and the holding time is 0.5h. After testing, the high-silico...
Embodiment 2
[0038] First mix 87wt% high-silicon iron-silicon alloy powder, 1.4wt% silicon powder, 0.6wt% ammonium chloride powder and 11wt% silicon dioxide powder evenly, then heat treatment under the protection of argon, the heat treatment temperature is 900°C, the holding time is 2.5h; then at 400°C, under the condition of oxygen, oxidation treatment for 3.5h, magnetic separation, to obtain high-silicon-iron-silicon alloy composite powder, which is used as the raw material for laser sintering 3D printing. The ring blank is prepared by laser sintering 3D printing. The scanning method of 3D printing adopts orthogonal scanning. The ring blank was ultrasonically cleaned for 8 minutes, and the blank was dried at 90°C. In the vacuum annealing step, the annealing heat treatment temperature is 600°C, and the holding time is 1.5h. In this embodiment, the relative magnetic permeability of the high-silicon steel soft magnetic core based on laser sintering 3D printing is 87, and the saturation magn...
Embodiment 3
[0040] First mix 89wt% high-silicon iron-silicon alloy powder, 1.4wt% silicon powder, 0.4wt% ammonium chloride powder and 9.2wt% silicon dioxide powder, and then heat treatment under nitrogen protection. The heat treatment temperature is 1100°C, the holding time is 2.5h; then at 600°C, under the condition of oxygen, oxidation treatment for 3.5h, magnetic separation, to obtain high-silicon-iron-silicon alloy composite powder, which is used as the raw material for laser sintering 3D printing. The ring blank is prepared by laser sintering 3D printing. The scanning method of 3D printing adopts orthogonal scanning. The laser sintering processing parameters are: preheating temperature is 65°C, laser power is 220W, and scanning speed is 900mm / s. The ring blank was ultrasonically cleaned for 7 minutes, and the blank was dried at 110°C. In the vacuum annealing step, the annealing heat treatment temperature is 700°C, and the holding time is 2h. In this embodiment, the relative magnetic ...
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