A kind of preparation method of p92 steel with al-ca composite hinge wire refining inclusions
An inclusion, al-ca technology, applied in the field of iron and steel materials, can solve the problems of CaO nano-grain refinement and inclusion, and achieve the effect of shortening the steelmaking process and reducing the cost.
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Embodiment 1
[0050] (1) The chemical composition (mass percentage) of the alloy 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.% (equivalent to 30ppm) O, balance Fe;
[0051] (2) Use the electric furnace to carry out vacuum smelting heating method to heat and melt the alloy into molten steel. After the molten steel is completely melted, carry out alloying operation, and then overheat the temperature to 55°C until the molten steel surface is stable;
[0052] (3) if figure 2 As shown, after the refining operation of the LF furnace, the wire feeding machine is used to feed 10 wires such as figure 1 The φ0.7mm Al-Ca composite hinge wire shown;
[0053] (4) While feeding the wire, the bottom blowing inert gas forms a flow field in the melt;
[0054] (5) Measure the oxygen concentration after the wire feeding is completed, and perform VD ...
Embodiment 2
[0063] (1) The chemical composition (mass percentage) of the alloy 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.% (equivalent to 30ppm) O, balance Fe.
[0064] (2) Use the electric furnace to carry out vacuum smelting heating method to heat and melt the alloy into molten steel. After the molten steel is completely melted, carry out alloying operation, and then overheat the temperature to 80°C until the liquid steel surface is stable;
[0065] (3) if figure 2 As shown, after the refining operation of the LF furnace, the wire feeding machine is used to feed 12 wires such as figure 1 The φ1.5mm Al-Ca composite hinge wire shown;
[0066] (4) While feeding the wire, the bottom blowing inert gas forms a flow field in the melt;
[0067] (5) Measure the oxygen concentration after the wire feeding is completed, and perform VD ...
Embodiment 3
[0074] (1) The chemical composition (mass percentage) of the alloy 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.% (equivalent to 30 ppm) O, balance Fe.
[0075] (2) Use the electric furnace to carry out vacuum smelting heating method to heat and melt the alloy into molten steel. After the molten steel is completely melted, carry out alloying operation, and then overheat the temperature to 95°C until the molten steel surface is stable;
[0076] (3) if figure 2 As shown, after the refining operation of the LF furnace, the wire feeding machine is used to feed 15 wires such as figure 1 The φ2.7mm Al-Ca composite hinge wire shown;
[0077] (4) While feeding the wire, the bottom blowing inert gas forms a flow field in the melt;
[0078] (5) Measure the oxygen concentration after the wire feeding is completed, and perform VD...
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