Corrosion-resistant steel plate for ocean platform and production method of steel plate
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The technology of an offshore platform and a production method is applied in the field of steelmaking to achieve the effects of dense organization, good desulfurization effect and suitable smelting process
Active Publication Date: 2019-09-27
NANYANG HANYE SPECIAL STEEL CO LTD
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However, the performance of traditional steel for offshore platforms cannot meet the above requirements.
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Embodiment 1
[0044] To produce a corrosion-resistant steel plate for marine platforms, the chemical composition and weight percentage are: C: 0.03%, Si: 0.02%, Mn: 1%, P: 0.072%, S: 0.004%, Als: 0.020%, Cr: 0.43%, Mo: 0.50%, Zr: 0.09%, Nb: 0.049%, Ni: 0.8%, Ce: 0.03%, Cu: 0.75%, Ca: 0.0028%, the others are Fe and inevitable impurities.
Embodiment 2
[0046] To produce a corrosion-resistant steel plate for offshore platforms. Its chemical composition and weight percentage are: C: 0.05%, Si: 0.08%, Mn: 1.03%, P: 0.075%, S: 0.005%, Als: 0.040%, Cr: 0.49%, Mo: 0.52%, Zr: 0.10%, Nb: 0.053%, Ni: 0.82%, Ce: 0.04%, Cu: 0.79%, Ca: 0.003%, the others are Fe and unavoidable impurities.
Embodiment 3
[0048] To produce a corrosion-resistant steel plate for offshore platforms. Its chemical composition and weight percentage are: C: 0.04%, Si: 0.07%, Mn: 1.01%, P: 0.073%, S: 0.002%, Als: 0.034%, Cr: 0.48%, Mo: 0.49%, Zr: 0.082%, Nb: 0.049%, Ni: 0.81%, Ce: 0.032%, Cu: 0.74, Ca: 0.0027%, the others are Fe and unavoidable impurities.
[0049] The above-mentioned embodiment 1, embodiment 2 and embodiment 3 are all realized by the following steps: 1) KR molten iron pretreatment: when the slag before and after slag is scraped, the thickness of the slag layer on the liquid surface is ≤20mm, and the molten iron passes through KR. After stirring and desulfurization, the S content of molten iron is ≤0.005%, the desulfurization cycle is 17-20min, and the temperature drop of desulfurization is ≤20℃;
[0050] 2) Converter smelting: when entering the furnace, the molten iron S content is less than or equal to 0.005%, P content is less than or equal to 0.08%, the molten iron temperature is greate...
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Abstract
The invention belongs to the technical field of ferrous metallurgy, and discloses a corrosion-resistant steel plate for an ocean platform and a production method of the steel plate. The corrosion-resistant steel plate is prepared firstly from the combination of proper components in percentage by weight and then by carrying out KR molten iron pretreatment, converter smelting, argon-blowing station fed with aluminum wire, LF furnace refining, VD vacuum refining, continuous casting, heating, controlled rolling and controlled cooling, heap cooling, quenching, tempering and the like. According to the corrosion-resistant steel plate for the ocean platform and the production method of the steel plate, compared with the prior art, the produced steel plate has the advantages of excellent corrosion resistance, good low-temperature impact toughness and excellent comprehensive performance, and is especially suitable for being used under cold weather and seawater corrosion conditions.
Description
Technical field [0001] The invention relates to the technical field of steelmaking, in particular to a steel plate for corrosion-resistant marine platforms and a production method thereof. Background technique [0002] Steel plates for offshore platforms are required to have high corrosion resistance and excellent low-temperature impact performance. At the same time, the steel plates are required to have good welding performance and can be cut, bent, welded, etc., and can be welded, plug welded, bolted, etc. with other structures For the connection, the quality of the steel plate is very demanding. For marine environment conditions, especially deep-sea environments, excellent corrosion resistance, low-temperature impact toughness, and welding crack sensitivity resistance are required to make the steel plate more suitable for use in cold regions and deep-sea environments, while meeting the needs of welding processing. The performance of traditional steel for offshore platforms ca...
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Application Information
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