Hydrogen sulfide corrosion resistant hardened and tempered high-strength steel plate for offshore drilling platform and producing method for hydrogen sulfide corrosion resistant hardened and tempered high-strength steel plate

A steel plate production method and hydrogen sulfide resistance technology, applied in the field of metallurgy, can solve problems that restrict the development of national economic construction, etc., and achieve the effects of excellent hydrogen sulfide corrosion resistance, excellent impact toughness, and reduced sulfur content

Active Publication Date: 2017-03-22
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, due to the lack of necessary production equipment and technical support, and because there is no domestic mature experience in the production of hydrogen sulfide corrosion-resistant quenched and tempered high-strength steel plates for offshore drilling platforms, it cannot meet the needs of the domestic market and seriously restricts the development of my country's national economic construction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The hydrogen sulfide corrosion-resistant quenched and tempered high-strength steel plate for the offshore drilling platform adopts the following composition ratio and production process. Composition ratio (wt): C: 0.15%, Si: 0.24%, Mn: 1.16%, Ni: 1.20%, P: 0.010%, S: 0.003%, Al: 0.035%, Nb: 0.023%, V: 0.035 %, Ti: 0.018%, Cr: 1.05%, Mo: 0.45%, B: 0.0005%, Cu: 0.12%, and the balance is Fe and unavoidable impurities. Thickness 85mm.

[0036] Production process: (1) Smelting process: molten steel is firstly smelted in the primary smelting furnace, then sent to the LF refining furnace for refining, using increased slag volume and multiple slag flows to facilitate removal of P, when the ladle temperature is 1580°C, the VD furnace is vacuumed During the refining process, feed aluminum wire 4kg / t molten steel and Si-Ca wire 5.5m / t molten steel into the molten steel. During vacuum treatment, the vacuum degree is 66Pa, and the vacuum holding time is 25min.

[0037] (2) Continu...

Embodiment 2

[0043] The hydrogen sulfide corrosion-resistant quenched and tempered high-strength steel plate for the offshore drilling platform adopts the following composition ratio and production process. Composition ratio (wt): C: 0.14%, Si: 0.26%, Mn: 1.09%, Ni: 1.21%, P: 0.008%, S: 0.002%, Al: 0.038%, Nb: 0.025%, V: 0.033 %, Ti: 0.015%, Cr: 1.08%, Mo: 0.48%, B: 0.0009%, Cu: 0.10%, and the balance is Fe and unavoidable impurities. Thickness 60mm.

[0044] Production process: (1) Smelting process: The molten steel is smelted in the primary smelting furnace first, and then sent to the LF refining furnace for refining. The slag volume is increased and the slag is flowed multiple times to facilitate the removal of P. When the ladle temperature is 1590°C, the VD furnace is vacuumed. During the refining process, feed aluminum wire 4kg / t molten steel and Si-Ca wire 5m / t molten steel into the molten steel. During vacuum treatment, the vacuum degree is 68Pa, and the vacuum holding time is 23mi...

Embodiment 3

[0051] The hydrogen sulfide corrosion-resistant quenched and tempered high-strength steel plate for the offshore drilling platform adopts the following composition ratio and production process. Composition ratio (wt): C: 0.13%, Si: 0.15%, Mn: 1.30%, Ni: 1.25%, P: 0.012%, S: 0.001%, Al: 0.020%, Nb: 0.020%, V: 0.030 %, Ti: 0.02%, Cr: 1.00%, Mo: 0.50%, B: 0.0015%, Cu: 0.20%, and the balance is Fe and unavoidable impurities. Thickness 85mm.

[0052] Production process: (1) Smelting process: molten steel is first smelted in the primary smelting furnace, and then sent to the LF refining furnace for refining. The slag volume is increased and the slag is flowed multiple times to facilitate the removal of P. When the ladle temperature is 1600°C, the VD furnace is vacuumed. During the refining process, aluminum wire 3kg / t molten steel and Si-Ca wire 6m / t molten steel are fed into the molten steel. During vacuum treatment, the vacuum degree is 70Pa, and the vacuum holding time is 15min....

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Abstract

The invention discloses a hydrogen sulfide corrosion resistant hardened and tempered high-strength steel plate for an offshore drilling platform. The steel plate consists of the following chemical components in percentage by weight: 0.13%-0.15% of C, 0.15%-0.35% of Si, 1.10%-1.30% of Mn, 1.20%-1.25% of Ni, less than or equal to 0.012% of P, less than or equal to 0.003% of S, 0.020%-0.050% of Al, 0.020%-0.030% of Nb, 0.030%-0.040% of V, 0.015%-0.02% of Ti, 1.00%-1.10% of Cr, 0.40%-0.50% of Mo, 0.0005%-0.0015% of B, less than or equal to 0.25% of Cu, and the balance Fe and inevitable impurities. A production method comprises the processes of heating, rolling and thermal treatment. The steel plate produced by the production method has the characteristics of being uniform in component and internally compact, has a good structure, good comprehensive properties, good hydrogen sulfide corrosion resistance and good welding performance, and the performances of the steel plate completely meet operating requirements of the hydrogen sulfide corrosion resistant hardened and tempered high-strength steel plate for the offshore drilling platform.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a hydrogen sulfide corrosion-resistant quenched and tempered high-strength steel plate for an offshore drilling platform and a production method. Background technique [0002] In recent years, with the rapid development of national economic construction, the demand for hydrogen sulfide corrosion-resistant quenched and tempered high-strength steel plates for offshore drilling platforms has become increasingly prominent, and the market demand for hydrogen sulfide-resistant quenched and tempered high-strength steel plates for offshore drilling platforms is increasing . For a long time, due to the lack of necessary production equipment and technical support, and because there is no domestic mature experience in the production of hydrogen sulfide corrosion-resistant quenched and tempered high-strength steel plates for offshore drilling platforms, it cannot meet the need...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C38/50C22C38/48C22C38/46C22C38/44C22C38/42C22C38/06C22C38/04C22C38/02C21D8/02C21C7/10
CPCC21C7/0006C21C7/0056C21C7/10C21D8/0226C21D8/0263C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54
Inventor 邓建军莫德敏韦明叶建军赵红康
Owner WUYANG IRON & STEEL
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