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Hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessel and production method

A high-strength steel plate and anti-hydrogen sulfide 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 anti-hydrogen sulfide corrosion performance, improved purity, and good low-temperature toughness

Active Publication Date: 2019-05-31
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 low-alloy high-strength steel plates for pressure vessels, 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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  • Hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessel and production method
  • Hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessel and production method
  • Hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessel and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessels adopts the following composition ratio and production process. Composition ratio (wt): C: 0.14%, Si: 0.24%, Mn: 0.49%, P: 0.003%, S: 0.003%, Al: 0.024%, Cr: 0.94%, Mo: 0.49%, Cu: 0.01 %, Sb: 0.001%, Sn: 0.001%, As: 0.001%, the balance is Fe and unavoidable impurities, and the thickness is 75mm.

[0040] 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, 3.5kg / t of aluminum wire and 5.5m / t of Si-Ca wire are fed into the molten steel. During vacuum treatment, the vacuum degree is 66Pa, and the vacuum holding time is 25min.

[0041] (2) Continuous casting process: Continuous...

Embodiment 2

[0049] The hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessels adopts the following composition ratio and production process. Composition ratio (wt): C: 0.13%, Si: 0.30%, Mn: 0.51%, P: 0.006%, S: 0.003%, Al: 0.030%, Cr: 1.00%, Mo: 0.48%, Cu: 0.02 %, Sb: 0.002%, Sn: 0.002%, As: 0.002%, the balance is Fe and unavoidable impurities, and the thickness is 65mm.

[0050] 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 1585°C, the VD furnace is vacuumed During the refining process, 3.0kg / t of aluminum wire and 5.0m / t of Si-Ca wire are fed into the molten steel. During vacuum treatment, the vacuum degree is 65Pa, and the vacuum holding time is 25min.

[0051] (2) Continuous casting process: Continuous casti...

Embodiment 3

[0059] The hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessels adopts the following composition ratio and production process. Composition ratio (wt): C: 0.15%, Si: 0.28%, Mn: 0.50%, P: 0.006%, S: 0.003%, Al: 0.035%, Cr: 0.98%, Mo: 0.50%, Cu: 0.03 %, Sb: 0.002%, Sn: 0.003%, As: 0.002%, the balance is Fe and unavoidable impurities, and the thickness is 52mm.

[0060] 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, 3.5kg / t of aluminum wire and 5.3m / t of Si-Ca wire are fed into the molten steel. During vacuum treatment, the vacuum degree is 65Pa, and the vacuum holding time is 25min.

[0061] (2) Continuous casting process: Continuous cas...

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Abstract

The invention discloses a hydrogen-sulfide-corrosion-resisting, low-alloy and high-strength steel plate for a pressure container and a production method of the steel plate. The high-strength steel plate comprises chemical components including, by mass percent, 0.13%-0.16% of C, 0.20%-0.40% of Si, 0.45%-0.60% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.005% of S, 0.020%-0.050% of Al, 0.90%-1.10% of Cr, 0.45%-0.60% of Mo, smaller than or equal to 0.20% of Cu, smaller than or equal to 0.0025% of Sb, smaller than or equal to 0.010% of Sn, smaller than or equal to 0.016% of As and the balance Fe and inevitable impurities. The production method includes the heating process, the rolling process and the heat treatment process. The steel plate has the beneficial effects that density is high, the strength grade is high, low-temperature impact toughness at the temperature of minus 10 DEG C is good, hardness is moderate, and the hydrogen-sulfide-corrosion-resisting performance is good; and the requirement for hydrogen-sulfide-corrosion-resisting steel for the pressure container can be met, and good comprehensive performance and good welding performance are achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a hydrogen sulfide corrosion-resistant low-alloy high-strength steel plate for pressure vessels 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 low-alloy high-strength steel plates for pressure vessels has become increasingly prominent, and the market demand for hydrogen sulfide-resistant low-alloy high-strength steel plates for pressure vessels 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 low-alloy high-strength steel plates for pressure vessels, it cannot meet the needs of the domestic market and seriously restricts the development of my country's national econom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/22C22C38/20C22C38/60C21D8/02C21D1/18
CPCC21D1/18C21D8/0226C21D8/0247C22C38/002C22C38/008C22C38/02C22C38/04C22C38/06C22C38/20C22C38/22C22C38/60
Inventor 邓建军莫德敏张志勇
Owner WUYANG IRON & STEEL
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