Additive for preparing fine oxide dispersion steel, preparation and use thereof
A technology of additives and oxides, applied in the field of metallurgy, can solve problems such as difficult mass production of molten steel
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Embodiment 1
[0067] Preparation of low melting point pre-melted slag, take CaO powder 40%, Al 2 o 3 Powder 35%, SiO 2 Powder 10%, MgO powder 10%, CaF 2 Put 5% of the powder into the mixer for uniform mixing, then melt and cool in the magnesia crucible, and then grind it into a powder with a particle size of 1nm-3.5mm, and its melting point is 1100-1550°C for later use; then follow the formula Proportioning: 30% of low-melting pre-melted slag powder, 5% of calcium fluoride powder, 55% of calcium oxide powder, 5% of calcium carbonate, and 5% of clay with a particle size of 1nm to 3.5mm are put into the mixer for mixing. Mix the materials uniformly for 1-8 hours, wherein the activity of the calcium oxide is ≥200ml; put the prepared powder into a drying equipment at 80-200°C for 8-24 hours; The carbon steel strip is used as the sheath of the cored wire, and the wire core is the above-mentioned powder that has been dried. On the wire making machine, the single-layer steel strip is lapped to ...
Embodiment 2
[0071] Take CaO10% and Al according to the formula ratio 2 o 3 50%, SiO 2 5%, MgO5%, CaF 2 30% The method for preparing low-melting point pre-melted slag powder is the same as that in Example 1; take 1% of low-melting point pre-melted slag powder, 30% of calcium fluoride, 40% of magnesium carbonate, and 29% of magnesium oxide with a particle size of 1nm to 3.5mm. . Its powder preparation process and drying treatment are the same as in Example 1; the low-carbon steel strip with a thickness of 2 to 5 mm is used as the sheath of the cored wire, and the wire core is the dried above-mentioned powder on the wire making machine, and the packaging adopts a single Core-spun wire is produced by overlapping steel strips, the wire-wrapping speed is 8-30m / min, and the powder content of the core-spun wire is 100-240g / m. Core-spun wire is packaged in 1000-2000m / roll, which is beneficial to directly control the amount and speed of addition. The cross-section of the core-spun wire is circu...
Embodiment 3
[0075] Take CaO70% and Al according to the formula ratio 2 o 3 15%, SiO 2 3%, MgO 2%, CaF 2 10% method for preparing low-melting point pre-melted slag powder is the same as in Example 1; the particle size is 1nm to 3.5mm, and the prepared low-melting point pre-melted slag powder is 45% mixture of calcium carbonate and magnesium carbonate, 30% of calcium oxide and magnesium oxide. 10% of the mixture, 10% of bentonite, and 5% of water glass powder are placed in a vertical mixer and mixed for 2 to 8 hours; then dried on the drying equipment, the drying temperature is 80 to 200 ° C, and the time is 8 to 8 hours. 24h is the finished powder. Cool to room temperature and put it into an ultra-thin high-strength polyethylene plastic bag, and pack it in a moisture-proof sealed package of 1000kg / bag. The package must be well sealed to prevent moisture, and it should be used within 20 days.
[0076] The technical method for preparing fine oxide dispersion steel comprises the following...
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