Strain design region based high-performance pipeline steel with high-deformation resistance and preparation method

A large deformation resistant and high performance technology, applied in the fields of large deformation resistant pipeline steel, oil and gas pipeline engineering construction, high performance large deformation resistant pipeline steel and its preparation, to achieve excellent large deformation resistance, low temperature toughness and good comprehensive performance

Inactive Publication Date: 2015-12-30
SHOUGANG CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-performance large-deformation-resistant pipeline steel for strain-based design areas and its preparation method. The product has excellent large-deformation resistance and low-temp...

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  • Strain design region based high-performance pipeline steel with high-deformation resistance and preparation method
  • Strain design region based high-performance pipeline steel with high-deformation resistance and preparation method
  • Strain design region based high-performance pipeline steel with high-deformation resistance and preparation method

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Embodiment Construction

[0032] According to the present invention, the high-performance large-deformation-resistant pipeline steel and its production method are smelted on a 100-ton converter, controlled rolling and controlled cooling are performed on a 4300mm production line, and tubes are made through a JCOE / UOE production line, using a semi-automatic flux-cored wire self-shielded welding process. Circumferential seam welding. The present invention will be further described below by way of examples. In the embodiment, the chemical composition of the steel plate is shown in Table 1, the process system of the embodiment is shown in Table 2, and the mechanical properties of the embodiment are shown in Table 3:

[0033] Example chemical composition

[0034] Table 1. Chemical composition (wt%) of the embodiment of the high-performance large-deformation-resistant pipeline steel of the present invention

[0035]

[0036] Among them, in Examples 1-5, C+Nb is controlled in the range of 0.08-0.10%, Cr+C...

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Abstract

The invention discloses strain design region based high-performance pipeline steel with high-deformation resistance and a preparation method and belongs to the technical field of high-strength pipeline steel. The chemical composition of the pipeline steel comprises components in percentage by weight as follows: 0.04%-0.07% of C, 0.02%-0.05% of Nb, 0.10%-0.30% of Si, 1.00%-1.60% of Mn, 0.01%-0.05% of Alt, 0.015%-0.025% of Ti, 0.15%-0.40% of Ni, 0.10%-0.30% of Cr, 0.10%-0.30% of Cu, smaller than or equal to 0.012% of P, smaller than or equal to 0.003% of S, smaller than or equal to 0.005% of N, smaller than or equal to 0.002% of O, smaller than or equal to 0.004% of B and the balance of Fe and inevitable impurities, wherein the content of C and Nb is 0.08%-0.10%, the content of Cr and Cu is 0.20%-0.40%, and the content of P, S, N, O and B is smaller than or equal to 0.016%. The high-performance pipeline steel has the advantages of excellent high-deformation resistance, low-temperature toughness, CTOD (crack tip opening displacement) fracture toughness and acid resistance.

Description

technical field [0001] The invention belongs to the technical field of high-strength pipeline steel, and in particular relates to a high-performance large-deformation-resistant pipeline steel for strain-based design areas and a preparation method, which has excellent large-deformation resistance, low-temperature toughness, CTOD fracture toughness, and acid resistance. As well as large deformation resistant pipeline steel with excellent weldability, it is suitable for oil and gas pipeline construction in strain-based design areas. Background technique [0002] With the rapid development of oil and natural gas resources, the exploitation of oil and gas fields in the world is developing in harsh environments such as remote deserts, seismic zones, polar tundra and oceans, and the pipelines are inevitably subjected to complex and changeable geological disaster environments. Seriously affected the safe operation of the pipeline. In order to ensure the economy and safety of pipeli...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/54C22C38/58C21D8/02
Inventor 李少坡丁文华李家鼎李战军张海马长文王立峰李群谌铁强郝宁
Owner SHOUGANG CORPORATION
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