Method and device for preparing continuous cylindrical crystalline texture high-silicon electrical steel bar
A high-silicon electrical steel and columnar crystal technology is applied in the field of devices for preparing high-silicon electrical steel bars with continuous columnar crystal structure, and can solve the problem of difficulty in preparing high-silicon electrical steel bars, poor thermal conductivity and thermal conductivity of high-silicon electrical steel. Insufficient and other problems, to meet the requirements of subsequent processing and performance, improve the efficiency of vacuuming, and reduce the effect of high temperature reaction
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Embodiment 1
[0030] Example 1: Fe-6.5Si-0.05B high-silicon steel bar with a diameter of 20 mm and a length of 300 mm.
[0031]The Fe-6.5Si-0.05B high-silicon steel alloy is melted in a medium-frequency vacuum induction furnace and cast into ingots. The raw materials are rod-shaped pure iron (99.9%), block-shaped metal silicon (99.9%) and block-shaped ferroboron (the total content of iron and boron is 99.95%, and boron content is 17.5%). High-silicon steel rods with a diameter of 20mm and a length of 300mm were prepared under the process scheme of high-frequency power supply frequency 450kHz, power 40kW, melt temperature 1500°C, cooling water flow rate of about 15L / min, and traction speed of 2mm / min. . The surface of the prepared bar is relatively bright, the internal structure is continuous columnar grain structure, and the diameter of the columnar grain is about 1000 μm. image 3 , as shown in 4.
[0032] X-ray diffraction experiments were carried out on the cross section of the ba...
Embodiment 2
[0033] Example 2: Fe-6.5Si-0.05B high-silicon steel bar with a diameter of 6 mm and a length of 200 mm.
[0034] The Fe-6.5Si-0.05B high-silicon steel alloy is melted in a medium-frequency vacuum induction furnace and cast into ingots. The raw materials are rod-shaped pure iron (99.9%), block-shaped metal silicon (99.9%) and block-shaped ferroboron (the total content of iron and boron is 99.95%, and boron content is 17.5%). High-silicon steel rods with a diameter of 6mm and a length of 200mm were prepared under the process scheme of high-frequency power supply frequency 600kHz, power 15kW, melt temperature 1450°C, cooling water flow rate of about 10L / min, and traction speed of 10mm / min. The surface of the prepared rod is relatively bright, and the internal structure and X-ray diffraction results are similar to those of Example 1, all of which are columnar crystal structures.
Embodiment 3
[0035] Example 3: Fe-6.5Si-0.05B high-silicon steel bar with a diameter of 50 mm and a length of 500 mm.
[0036] The Fe-6.5Si-0.05B high-silicon steel alloy is melted in a medium-frequency vacuum induction furnace and cast into ingots. The raw materials are rod-shaped pure iron (99.9%), block-shaped metal silicon (99.9%) and block-shaped ferroboron (the total content of iron and boron is 99.95%, and boron content is 17.5%). High-silicon steel rods with a diameter of 50mm and a length of 500mm were prepared under the process scheme of high-frequency power supply frequency 600kHz, power 15kW, melt temperature 1550°C, cooling water flow rate of about 20L / min, and traction speed of 0.5mm / min. . The surface of the prepared rod is relatively bright, and the internal structure and X-ray diffraction results are similar to those of Example 1, all of which are columnar crystal structures.
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