Method for preparing high-magnetic-property powder silicon steel sheet
A technology of powder silicon and performance is applied in the field of preparing high magnetic performance powder silicon steel sheet, which can solve the problems of unstable performance and low yield, and achieve the effects of excellent performance, no pollution and high production efficiency.
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Embodiment example 1
[0024] (1) Mix 20 μm electrolytic iron powder, 90 μm pure silicon powder and 15 μm Fe-25wt.% P ferrophosphorus powder according to the mass fraction of Fe-3wt.% Si-0.25wt.% P, and use a mixer Mix the above powder for 3h;
[0025] (2) Put the mixed powder into a plate-shaped silica gel mold, and perform cold isostatic pressing after fully vibrating. The pressure is controlled at 180MPa, and the pressure holding time is 60s. ×176mm×34mm (thick);
[0026] (3) Vacuum sinter the thick slab block at 1080°C for 3 hours to achieve metallurgical bonding and uniform element diffusion to obtain sintered slabs;
[0027] (4) After the above-mentioned sintered slab is heated to 860°C, hot rolling is carried out for 5 passes, after hot rolling to a slab thickness of 1.6 mm, 6 passes of warm rolling are carried out at 300° C. to a slab thickness of 0.45 mm;
[0028] (5) After fully pickling with 10% HCl aqueous solution, carry out 3 passes of cold rolling to a slab thickness of 0.24mm;
[...
Embodiment example 2
[0031] (1) Mix 30 μm electrolytic iron powder, 120 μm pure silicon powder and 8 μm Fe-40wt.% P ferrophosphorus powder according to the mass fraction of Fe-3.8wt.% Si-0.12wt.% P. machine to mix the above powder for 2.5h;
[0032] (2) Put the mixed powder into a plate-shaped silica gel mold, and perform cold isostatic pressing after fully vibrating. The pressure is controlled at 120MPa, and the holding time is 90s. ×189mm×42mm (thick);
[0033] (3) Vacuum sinter the thick slab blank at 1120°C for 3.5h to achieve metallurgical bonding and uniform element diffusion to obtain sintered slab;
[0034] (4) After heating the above-mentioned sintered slab to 820°C, carry out 7 passes of hot rolling, after hot rolling to a slab thickness of 2.0mm, carry out 5 passes of warm rolling at 340°C to a slab thickness of 0.48mm;
[0035] (5) After fully pickling with 10% HCl aqueous solution, carry out 4 passes of cold rolling to a slab thickness of 0.22mm;
[0036] (6) Vacuum anneal the cold...
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