A production method for improving steel plate resistance to hydrogen-induced cracking

A technology of anti-hydrogen-induced cracking and production method is applied in the field of simple production of steel-making process and anti-hydrogen-induced cracking pipeline steel plate, which can solve problems such as pitting corrosion and metal cracking, and achieves reduction of alloy cost, reduction of center segregation and rolling. The effect of simple and easy molding method

Active Publication Date: 2016-04-27
NANJING IRON & STEEL CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it not only causes pitting corrosion, but also often leads to metal cracking; hydrogen sulfide corrosion is the most serious and dangerous of the four major corrosions in oil and gas fields

Method used

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  • A production method for improving steel plate resistance to hydrogen-induced cracking
  • A production method for improving steel plate resistance to hydrogen-induced cracking

Examples

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Embodiment example 1

[0020] This embodiment provides a production method for improving the steel plate's resistance to hydrogen-induced cracking. The composition of the steel grade is C0.038%, Si0.22%, Mn0.53%, P0.010%, S0.002%, and Nb0. 005%, Ti0.017%, Mo0.01%, Cr4.06%, Ni0.10%, Al0.041%, V0.007%, the balance is Fe and impurities; the rolling process adopts conventional rolling process, Austrian The tempering temperature is 1190°C-1215°C, and the final rolling temperature is 825-850°C; then air-cooled.

Embodiment example 2

[0022] This embodiment provides a production method for improving the steel plate's resistance to hydrogen-induced cracking. The composition of the steel grade is C0.043%, Si0.23%, Mn0.49%, P0.010%, S0.003%, and Nb0. 003%, Ti0.019%, Mo0.01%, Cr3.89%, Ni0.15%, Al0.041%, V0.006%, the balance is Fe and impurities; the rolling process adopts conventional rolling process, Austrian The tempering temperature is 1200°C-1220°C, and the final rolling temperature is 855-870°C; then air-cooled.

[0023] figure 1 , 2 Both are examples of steel plates obtained under a metallographic microscope typical structure morphology, uniform structure. Observe carefully figure 2 , it can be found that there is no obvious island structure on the matrix, which improves the H resistance of the steel plate. 2 S corrosion performance.

[0024] In this example, its composition is shown in Table 1 by weight percentage, and its resistance to hydrogen-induced cracking is shown in Table 2.

[0025] The c...

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Abstract

The invention discloses a simple production method of a novel anti-hydrogen-induced crack pipeline steel plate, the composition of which is C? 0.03~0.06%, Si? 0.10~0.35%, Mn? 0.4~0.8%, P≤0.010%, S≤0.010%, Nb≤0.0050%, Ti0.002~0.020%, Mo≤0.02%, Cr3.0~6.0%, Ni≤0.2%, Al≤0.060%, V ≤0.010%, the balance is Fe and impurities. The conventional rolling process is adopted, the austenitizing temperature is 1180°C-1220°C, and the final rolling temperature is 820-870°C; followed by air cooling. The obtained steel sheet has excellent resistance to hydrogen-induced cracking.

Description

technical field [0001] The invention relates to a steelmaking process, in particular to a simple production method of a hydrogen-induced crack-resistant pipeline steel plate, which belongs to the technical field of metal smelting processes. Background technique [0002] The overall characteristics of oil and gas distribution in my country are wide distribution, low output and low quality. Most of the discovered oil fields are concentrated in the eastern part of the land. In recent years, the western part and the shallow sea continental shelf have developed rapidly, and a number of important oil and gas fields have been developed, especially the gas fields are mainly distributed in the west. However, in the process of oil and gas exploitation, one has to face The problem is corrosion. [0003] For oil and gas field corrosion, according to the corrosion medium can be divided into: CO 2 Corrosion, H 2 S corrosion, multiphase flow erosion corrosion and soil corrosion. Accord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C38/28C21D8/02
Inventor 尹雨群唐春霞赵晋斌
Owner NANJING IRON & STEEL CO LTD
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