Low-cost continuous casting billet produced large-thickness steel plate for low-temperature pressure vessel and production method thereof
A pressure vessel and production method technology, applied in the field of metallurgy, can solve problems such as unfavorable process stable execution, large latent heat of solidification, slowing down production rhythm, etc. Effect
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Embodiment 1
[0029] The low-cost continuous casting slab of this embodiment is a large-thickness steel plate for low-temperature pressure vessels, with a thickness of 10 mm, which is smelted from the following components by mass percentage:
[0030] C: 0.05%, Si: 0.21%, Mn: 1.30%, P: 0.012%, S: 0.005%, Alt: 0.020%, Ni: 0.10%, Nb: 0.020%, the balance is Fe and trace unavoidable impurities . Crack sensitivity index Pcm: 0.134%, carbon equivalent Ceq: 0.297%.
[0031] The production method of the steel plate for low-cost continuous casting slab with large thickness and low temperature pressure vessel in this embodiment, the specific steps are as follows:
[0032](1) Smelting and casting: After smelting the molten steel containing the above-mentioned chemical components in various weight percentages, the molten steel is transferred to the ladle rotating platform connected to the host machine for continuous casting and casting. The superheat is 10°C and the casting speed is 0.8m / min to obtai...
Embodiment 2
[0040] The low-cost continuous casting slab of this embodiment is a large-thickness steel plate for low-temperature pressure vessels, with a thickness of 30 mm, which is smelted from the following components by mass percentage:
[0041] C: 0.05%, Si: 0.50%, Mn: 1.33%, P: 0.010%, S: 0.003%, Alt: 0.045%, Ni: 0.15%, Nb: 0.010%, the balance is Fe and trace unavoidable impurities . Crack sensitivity index Pcm: 0.146%, carbon equivalent Ceq: 0.305%.
[0042] The production method of the steel plate for low-cost continuous casting slab with large thickness and low temperature pressure vessel in this embodiment, the specific steps are as follows:
[0043] (1) Smelting and casting: After smelting the molten steel containing the above-mentioned chemical components in various weight percentages, the molten steel is transferred to the ladle rotating platform connected to the host machine for continuous casting and casting. The superheat is 20°C and the casting speed is 0.8m / min to obta...
Embodiment 3
[0051] The low-cost continuous casting slab of this embodiment is a large-thickness steel plate for low-temperature pressure vessels, with a thickness of 45 mm, which is smelted from the following components by mass percentage:
[0052] C: 0.07%, Si: 0.45%, Mn: 1.40%, P: 0.010%, S: 0.004%, Alt: 0.040%, Ni: 0.20%, Nb: 0.030%, the balance is Fe and trace unavoidable impurities . Crack sensitivity index Pcm: 0.169%, carbon equivalent Ceq: 0.340%.
[0053] The production method of the steel plate for low-cost continuous casting slab with large thickness and low temperature pressure vessel in this embodiment, the specific steps are as follows:
[0054] (1) Smelting and casting: After smelting the molten steel containing the above-mentioned chemical components in various weight percentages, the molten steel is transferred to the ladle rotating platform connected to the host machine for continuous casting and casting. The superheat is 25°C and the casting speed is 0.7m / min to obta...
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