Production method for improving hydrogen-induced crack resistance of steel plate

A technology of anti-hydrogen-induced cracking and production method, applied in the field of metal smelting process, can solve problems such as metal cracking and pitting corrosion, and achieve the effect of reducing center segregation, reducing alloy cost and good toughness

Active Publication Date: 2014-03-12
NANJING IRON & STEEL CO LTD
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  • Abstract
  • 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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  • Production method for improving hydrogen-induced crack resistance of steel plate
  • Production method for improving hydrogen-induced crack resistance of steel plate

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 steel composition is C 0.038%, Si 0.22%, Mn 0.53%, P 0.010%, S 0.002%, Nb 0.005%, and Ti 0.017% by weight percentage , Mo 0.01%, Cr 4.06%, Ni 0.10%, Al 0.041%, V 0.007%, the balance is Fe and impurities; the rolling process adopts the conventional rolling process, the austenitizing temperature is 1190 ℃ ~ 1215 ℃, the final The rolling temperature is 825-850°C; followed by air cooling.

Embodiment example 2

[0022] This embodiment provides a production method for improving steel plate resistance to hydrogen-induced cracking. The steel composition is C 0.043%, Si 0.23%, Mn 0.49%, P 0.010%, S 0.003%, Nb 0.003%, and Ti 0.019% by weight percentage , Mo 0.01%, Cr 3.89%, Ni 0.15%, Al 0.041%, V 0.006%, the balance is Fe and impurities; the rolling process adopts the conventional rolling process, the austenitizing temperature is 1200 ℃ ~ 1220 ℃, the final The rolling temperature is 855-870°C; followed by air cooling.

[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 T...

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Abstract

The invention discloses a simple production method for a novel hydrogen-induced crack resistant pipeline steel plate which comprises the following components in percentage by weight: 0.03 to 0.06% of C, 0.10 to 0.35% of Si, 0.4 to 0.8 % of Mn, 0 to 0.010% of P, 0 to 0.010% of S, 0 to 0.0050% of Nb, 0.002 to 0.020% of Ti, 0 to 0.02% of Mo, 3.0 to 6.0% of Cr, 0 to 0.2% of Ni, 0 to 0.060% of Al, 0 to 0.010% of V and the balance of Fe and impurities. The conventional rolling technology is adopted, the austenitizing temperature is 1180 to 1220 DEG C, the finish rolling temperature is 820 to 870 DEG C, and then wind cooling is performed. The obtained steel plate has an excellent hydrogen-induced crack resistant property.

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. Accor...

Claims

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Application Information

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Patent Type & Authority Applications(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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