690 MPa-grade hydrogen sulfide corrosion resisting steel plate and production method thereof

A technology of anti-hydrogen sulfide and production method, which is applied in the field of metallurgy, can solve the problems that restrict the development of national economic construction, etc., and achieve the effect of good anti-lamellar tearing performance, optimized heating and rolling conditions, and broad application prospects

Inactive Publication Date: 2017-05-10
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 mature experience in the production of large and high-strength hydrogen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The chemical composition and mass fraction of the 690MPa grade hydrogen sulfide corrosion-resistant steel plate in this example are shown in Table 1, and the thickness is 58 mm.

[0037] Composition ratio (wt): C: 0.15%, Si: 0.24%, Mn: 1.06%, Ni: 0.42%, P: 0.008%, S: 0.002%, AL: 0.035%, Nb: 0.023%, V: 0.040 %, Ti: 0.016%, Cr: 0.32%, Mo: 0.26%, B: 0.0019%, N: 0.0045%, Cu: 0.07%, and the balance is Fe and unavoidable impurities. Thickness 58mm.

[0038] 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 and Si-Ca wire 2m / t steel into the molten steel. During vacuum treatment, the vacuum degree is 66Pa, and the vacuum holding time is 25min.

[0039] (2) Continuous casting proc...

Embodiment 2

[0045] The chemical composition and mass fraction of the 690MPa grade hydrogen sulfide corrosion-resistant steel plate in this example are shown in Table 1, and the thickness is 78mm.

[0046] Composition ratio (wt): C: 0.16%, Si: 0.25%, Mn: 1.07%, Ni: 0.43%, P: 0.008%, S: 0.002%, Al: 0.029%, Nb: 0.025%, V: 0.036 %, Ti: 0.017%, Cr: 0.33%, Mo: 0.27%, B: 0.0018%, N: 0.0043%, Cu: 0.08%, and the balance is Fe and unavoidable impurities.

[0047] 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, aluminum wire and Si-Ca wire 1.8m / t steel are fed into the molten steel, the vacuum degree is 66Pa during vacuum treatment, and the vacuum holding time is 23min.

[0048] (2) Continuous ...

Embodiment 3

[0054] The chemical composition and mass fraction of the 690MPa grade hydrogen sulfide corrosion-resistant steel plate in this example are shown in Table 1, and the thickness is 68m.

[0055] Composition ratio (wt): C: 0.14%, Si: 0.20%, Mn: 1.05%, Ni: 0.45%, P: 0.012%, S: 0.002%, Al: 0.020%, Nb: 0.030%, V: 0.035 %, Ti: 0.01%, Cr: 0.30%, Mo: 0.25%, B: 0.0020%, N: 0.0055%, Cu: 0.20%, and the balance is Fe and unavoidable impurities.

[0056] Production process: (1) Smelting process: molten steel is first 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 1595°C, the VD furnace is vacuumed During the refining process, feed aluminum wire and Si-Ca wire 2m / t steel into the molten steel. During vacuum treatment, the vacuum degree is 65Pa, and the vacuum holding time is 15min.

[0057] (2) Continuous casting process: the degree of sup...

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Abstract

The invention discloses a 690 MPa-grade hydrogen sulfide corrosion resisting steel plate. The steel plate comprises the following chemical components in percentage by mass: 0.14-0.16% of C, 0.20-0.40% of Si, 1.05-1.10% of Mn, 0.40-0.45% of Ni, P not more than 0.012%, S not more than 0.003%, 0.020-0.040% of Al, 0.020-0.030% of Nb, 0.035-0.040% of V, 0.01-0.02% of Ti, 0.30-0.35% of Cr, 0.25-0.30% of Mo, 0.0015-0.0020% of B, N not more than 0.010%, Cu not more than 0.20%, and the balance of Fe and inevitable impurities. A production method of the 690 MPa-grade hydrogen sulfide corrosion resisting steel plate comprises the procedures of heating, rolling and heat treatment. The 690 MPa-grade hydrogen sulfide corrosion resisting steel plate has such characteristics as high compactness, higher strength grade, excellent low-temperature impact toughness, excellent lamellar tearing resistance and excellent hydrogen sulfide corrosion resistance, can satisfy the requirements of hydrogen sulfide corrosion resisting steel for ship storage tanks, is excellent in comprehensive performance and welding performance, and is lower in cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a 690MPa-grade hydrogen sulfide corrosion-resistant steel plate and a production method thereof. Background technique [0002] In recent years, with the rapid development of national economic construction, the demand for high-strength hydrogen sulfide corrosion-resistant steel plates has become increasingly prominent, and the market's demand for high-strength hydrogen sulfide-resistant steel plates is increasing. For a long time, due to the lack of necessary production equipment and technical support, and the lack of mature experience in the production of large and high-strength hydrogen sulfide corrosion-resistant steel plates in China, it cannot meet the needs of the domestic market and seriously restricts the development of my country's national economic construction. Contents of the invention [0003] The technical problem to be solved by the present inventio...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C38/50C22C38/48C22C38/46C22C38/44C22C38/42C22C38/06C22C38/02C22C38/04C21D8/02C21D1/18
CPCC22C38/54C21D1/18C21D8/0226C21D8/0263C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 邓建军莫德敏韦明叶建军陈起郭恒斌张俊凯任鑫磊
Owner WUYANG IRON & STEEL
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