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A kind of x65 grade high-strength toughness microbial corrosion resistant pipeline steel and its preparation method

A technology of microbial corrosion and microbial resistance, applied in the field of pipeline steel materials, can solve the problems of increasing production processes, increasing production costs, reducing production efficiency, etc., and achieves the effect of good microbial corrosion resistance

Active Publication Date: 2021-05-18
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

This makes Cu-containing microbial corrosion-resistant pipeline steel increase the production process in industrial production, reduce production efficiency, and increase production costs

Method used

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  • A kind of x65 grade high-strength toughness microbial corrosion resistant pipeline steel and its preparation method
  • A kind of x65 grade high-strength toughness microbial corrosion resistant pipeline steel and its preparation method
  • A kind of x65 grade high-strength toughness microbial corrosion resistant pipeline steel and its preparation method

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Embodiment Construction

[0030] Hereinafter, the present invention will be described by comparing various examples and comparative examples, and these examples are for explanatory purposes only, and the present invention is not limited to these examples.

[0031] Table 1 shows the chemical composition of the pipeline steel used in the examples and comparative examples. The steels of each example were made into steel plates through thermomechanical rolling control and slow cooling after rolling according to the parameters in Table 2, and the rolling and cooling of the comparative steels were carried out according to the traditional pipeline steel production process. Table 3 lists the mechanical properties of the steels of each embodiment and comparative example.

[0032] The chemical composition of the pipeline steel of table 1 embodiment and comparative example, (weight percent, Fe balance)

[0033] Numbering C mn Si Cu Nb Ti Mo Ni V Al Cr S P Example 1 0.036 0.02...

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Abstract

The invention belongs to the field of pipeline steel materials, in particular to an X65-grade high-strength, toughness and microbial corrosion-resistant pipeline steel and a preparation method thereof. In terms of weight percentage, the chemical composition of the steel is as follows: C: 0.02-0.035%; Si≤0.2%; Mn≤0.1%; Cu: 1.0-2.0%; Mo: 0.10-0.20%; Nb: 0.04-0.045%; Ti: 0.01~0.02%; S≤0.0015%; P≤0.0050%; the balance is Fe. The pipeline steel is prepared by slow cooling after hot rolling, so that the solid solution Cu in the steel undergoes natural aging precipitation, which achieves good toughness and microbial corrosion resistance, and at the same time achieves the purpose of reducing costs and increasing efficiency, and obtaining low cost , X65 grade high-strength, toughness and microbial corrosion-resistant pipeline steel suitable for industrialized mass production, so that the material can meet the higher requirements of the constantly developing comprehensive performance indicators.

Description

technical field [0001] The invention belongs to the field of pipeline steel materials, in particular to an X65-grade high-strength, toughness and microbial corrosion-resistant pipeline steel and a preparation method thereof. Background technique [0002] Copper (Cu) microbial corrosion-resistant pipeline steel is a new type of steel material developed to solve the problem of pipeline failure caused by microbial corrosion. corrosion function. With the increase of Cu content, the microbial corrosion resistance of this Cu-containing pipeline steel is enhanced. However, with the addition of high Cu content, the impact toughness of pipeline steel will decrease, resulting in a poor match between strength toughness and microbial corrosion resistance. This brings challenges to the comprehensive performance improvement of Cu-containing microbial corrosion-resistant pipeline steel. For example: Chinese invention patent (application publication number: CN106337104 A) discloses a pipe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/14C22C38/16C21D8/00
CPCC21D8/005C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/12C22C38/14C22C38/16
Inventor 杨柯曾云鹏严伟史显波单以银
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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