Preparation method of P92 steel with Al-Ca composite reamed wire refined inclusions
A technology of inclusions and al-ca, applied in the field of iron and steel materials, can solve the problems of CaO nano-grain refinement and inclusions, and achieve the effect of shortening the steelmaking process and reducing costs
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Embodiment 1
[0050] (1) Alloy composition (mass percent) is:. 0.11wt% C, 0.4wt% Mn, 0.2wt% Si, 0.12wt% P, 0.01wt% S, 8.68wt% Cr, 0.29wt..... .% Ni, 0.46wt.% Mo, 0.18wt.% V, 1.67wt.% W, 0.01wt.% Ti, 0.001wt.% B, 0.007wt.% Al, 0.001wt.% Ca, 0.03wt.% . N, 0.003wt (corresponding to 30ppm)% O, the balance of Fe;
[0051] (2) using a vacuum melting furnace heating method, heating the alloy melted into molten steel, the molten steel after completely melted, alloying operation, and then heated superheater 55 ℃, molten steel surface to be stabilized;
[0052] (3) figure 2 Shown, after LF refining operations, by feeding filament yarn feeding method using a stirring machine such as a center fed toward the molten steel 10 figure 1 φ0.7mm shown Al-Ca composite hinge wire;
[0053] (4) while feeding the wire, the bottom-blown inert gas flow field is formed in the melt;
[0054] Measuring the oxygen concentration, oxygen free VD refining operation at around 10ppm (5) completion of feeding wire;
[0055] (6) ...
Embodiment 2
[0063] (1) Alloy composition (mass percent) is:. 0.11wt% C, 0.4wt% Mn, 0.2wt% Si, 0.12wt% P, 0.01wt% S, 8.68wt% Cr, 0.29wt..... .% Ni, 0.46wt.% Mo, 0.18wt.% V, 1.67wt.% W, 0.01wt.% Ti, 0.001wt.% B, 0.007wt.% Al, 0.001wt.% Ca, 0.03wt.% N, 0.003wt. (corresponding to 30ppm)% O, balance of Fe.
[0064] (2) using a vacuum melting furnace heating method, heating the alloy melted into molten steel, the molten steel after completely melted, alloying operation, and then heated superheater 80 ℃, molten steel surface to be stabilized;
[0065] (3) figure 2 Shown, after LF refining operation, feeding by using a filament yarn feeding method of stirring molten steel feeding machine 12 as the center figure 1 φ1.5mm shown Al-Ca composite hinge wire;
[0066] (4) while feeding the wire, the bottom-blown inert gas flow field is formed in the melt;
[0067] Measuring the oxygen concentration, oxygen free VD refining operation at around 10ppm (5) completion of feeding wire;
[0068] (6) VD after the ...
Embodiment 3
[0074] (1) Alloy chemical composition (mass percent) is: 0.11 wt.% C, 0.4 wt.% MN, 0.2 wt.% Si, 0.12 wt.% P, 0.01 wt.% S, 8.68 wt.% Cr, 0.29 wt .% Ni, 0.46 wt.% MO, 0.18 wt.% V, 1.67 wt.% W, 0.01 wt.% Ti, 0.001 wt.% B, 0.007 wt.% Al, 0.001 wt.% CA, 0.03 wt.% N, 0.003 wt.% (Equivalent to 30 ppm) O, margin Fe.
[0075] (2) Using the electric furnace to heat the heating method, the alloy is heated into a steel liquid. After all the steel fluid is melted, the alloy operation is performed, and the heat rise is 95 ° C, and the surface of the steel is stabilized.
[0076] (3) figure 2 As shown, after the LF furnace refining operation, the filament machine is fed into the steel liquid center by feeding the filament. figure 1 The φ2.7 mm Al-CA composite hinge is shown;
[0077] (4) While feeding, the bottom inert gas forms a flow field in the melt;
[0078] (5) After the filament is completed, the oxygen concentration is measured, and the free oxygen is carried out at 10 ppm or the VD refi...
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