Thin-specification high-strength steel plate with good low-temperature-resistant toughness and production method thereof
A technology for low-temperature-resistant toughness and high-strength steel plates, which is applied in the field of high-strength thin-gauge steel plates and their low-cost production, thin-gauge high-strength steel plates and their manufacturing fields, and can solve problems such as difficulty in process execution and achieve low cost and low production costs. The effect of low and small amount of alloy addition
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[0020] Example 1
[0021] The chemical composition of the steel plate of this embodiment is as follows:
[0022] The chemical composition and weight percentage content (%) of the product are: C: 0.12%, Si: 0.29%, Mn: 1.16%, S: 0.004%, P: 0.013%, Nb: 0.016%, Ti: 0.14%, Als: 0.031%, the rest is Fe and trace impurities.
[0023] The preparation methods of the above-mentioned steel plates are as follows: including molten iron and treatment, converter smelting, LF refining, slab continuous casting, slab heating, controlled rolling, hot straightening, and air cooling. The preparation methods of the above-mentioned steel plates are as follows: including hot metal pretreatment, duplex Steelmaking process deep dephosphorization, LF refining, RH vacuum degassing, slab continuous casting, slab heating, controlled rolling and controlled cooling, the size of the continuous casting slab is: 200mm×1800mm×2500mm, and the size of the steel plate is: 8mm×2800mm×37000mm ,among them:
[0024] (1) Hot m...
Example Embodiment
[0031] Example 2
[0032] The chemical composition of the steel plate of this embodiment is as follows:
[0033] The chemical composition and weight percentage content (%) of the product are: C: 0.15%, Si: 0.30%, Mn: 1.28%, S: 0.005%, P: 0.015%, Nb: 0.019%, Ti: 0.15%, Als: 0.034%, the rest is Fe and trace impurities.
[0034] The preparation methods of the above-mentioned steel plates are as follows: including molten iron and treatment, converter smelting, LF refining, slab continuous casting, slab heating, controlled rolling, hot straightening, and air cooling. The preparation methods of the above-mentioned steel plates are as follows: including hot metal pretreatment, duplex Steelmaking process: deep dephosphorization, LF refining, RH vacuum degassing, slab continuous casting, slab heating, controlled rolling and controlled cooling. The size of the continuous casting slab is: 200mm×1800mm×2700mm, and the size of the steel plate is 8mm×2900mm×37600mm ,among them:
[0035] (1) Hot m...
Example Embodiment
[0042] Example 3
[0043] The chemical composition of the steel plate of this embodiment is as follows:
[0044] The chemical composition and weight percentage content (%) of the product are: C: 0.12%, Si: 0.33%, Mn: 1.21%, S: 0.003%, P: 0.011%, Nb: 0.021%, Ti: 0.17%, Als: 0.029%, the rest is Fe and trace impurities.
[0045] The preparation methods of the above-mentioned steel plates are as follows: including molten iron and treatment, converter smelting, LF refining, slab continuous casting, slab heating, controlled rolling, hot straightening, and air cooling. The preparation methods of the above-mentioned steel plates are as follows: including hot metal pretreatment, duplex Steelmaking process: deep dephosphorization, LF refining, RH vacuum degassing, slab continuous casting, slab heating, controlled rolling and controlled cooling, continuous casting billet size: 200mm×1800mm×2500mm, steel plate size: 10mm×2600mm×32000mm ,among them:
[0046] (1) Hot metal pretreatment: After pre...
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