Low-cost thick-gauge low-alloy structural steel and production method thereof
A production method and technology of structural steel, applied in the field of steel production, can solve the problems of irregular head shape of strip steel, poor head shape control, easy to produce head tower shape, etc., to improve cold-formation performance, The performance index is stable and good, and the effect of eliminating the mixed crystal phenomenon
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Embodiment 1
[0030] The low-cost thick-gauge low-alloy structural steel produced in this embodiment is made of the following components in weight percentage: C: 0.17%, Si: 0.21%, Mn: 0.35%, P: 0.02%, S: 0.0062%, N : 0.0053%, the rest is Fe and unavoidable impurities, the thickness is 4.0mm.
[0031] A method for producing low-cost thick-gauge low-alloy structural steel, comprising the following steps:
[0032] 1) Smelting, refining outside the furnace and continuous casting into a billet, the thickness of the continuous casting billet is 70mm;
[0033] 2) Soak the cast slab, and control the temperature of the cast slab out of the furnace at 1130°C;
[0034] 3) After the slab is released from the furnace, it is descaled under high pressure and then finished rolling. The thickness of the finished product is 6mm, the sum of the reduction ratio of F1+F2 is 105%, and the cooling water volume of the rolls of F1 and F2 is 480m 3 / hour, the F4 frame is assumed to be false, and the exit temperat...
Embodiment 2
[0037] The low-cost thick-gauge low-alloy structural steel produced in this embodiment is made of the following components in weight percentage: C: 0.19%, Si: 0.17%, Mn: 0.45%, P: 0.018%, S: 0.008%, N : 0.006%, the rest is Fe and unavoidable impurities, the thickness is 7.0mm.
[0038] A method for producing low-cost thick-gauge low-alloy structural steel, comprising the following steps:
[0039] 1) Smelting, refining outside the furnace and continuous casting into a billet, the thickness of the continuous casting billet is 70mm;
[0040] 2) Soak the cast slab, and control the temperature of the cast slab to be 1100°C;
[0041] 3) After the slab is released from the furnace, it is descaled under high pressure and then finished rolling. The thickness of the finished product is 4mm, the sum of the reduction ratio of F1+F2 is 102%, and the cooling water volume of the rolls of F1 and F2 is 488m 3 / hour, the F3 frame is assumed to be false, and the exit temperature of the finish...
Embodiment 3
[0044] The low-cost thick-gauge low-alloy structural steel produced in this embodiment is made of the following components in weight percentage: C: 0.20%, Si: 0.15%, Mn: 0.5%, P: 0.023%, S: 0.01%, N : 0.0051%, the rest is Fe and unavoidable impurities, the thickness is 6.0mm.
[0045] A method for producing low-cost thick-gauge low-alloy structural steel, comprising the following steps:
[0046] 1) Smelting, refining outside the furnace and continuous casting into a billet, the thickness of the continuous casting billet is 70mm;
[0047] 2) Soak the cast slab, and control the temperature of the cast slab out of the furnace at 1120°C;
[0048] 3) After the slab is released from the furnace, it is descaled under high pressure and then finished rolling. The thickness of the finished product is 4mm, the sum of the reduction ratio of F1+F2 is 104%, and the cooling water volume of the rolls of F1 and F2 is 434m 3 / hour, the F3 frame is assumed to be false, and the exit temperatur...
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