High-performance seamless pipeline tube and preparation method thereof

A seamless line pipe and high-performance technology, which is applied in the field of high-performance seamless line pipe and its preparation, can solve the problems of complex alloy composition system and high manufacturing cost, so as to inhibit aggregation and growth, reduce production cost, and reduce cost Effect

Active Publication Date: 2019-06-21
DALIPAL PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of complex alloy composition system and high manufacturing cost of the existing seamless line pipe, the present invention provides a high-performance seamless line pipe and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An embodiment of the present invention provides a seamless line pipe, the chemical composition of which is:

[0047] C 0.13%, Si 0.35%, Mn 1.25%, S 0.005%, P 0.008%, Ti 0.03%, Nb 0.03%, V 0.001%, Al 0.04%, N 0.005%, Cr 0.1%, Ni 0.05%, Cu 0.05 %, Mo 0.003%, As 0.0061%, Sn 0.0031%, the rest is Fe and unavoidable impurities, Ceq=0.33%.

[0048] The preparation steps of the above-mentioned seamless line pipe are as follows:

[0049] Using scrap steel as raw material, through 80t electric arc furnace melting, ladle refining, VD vacuum degassing, and continuous casting process, the continuous casting round billet with the same chemical composition as the above seamless line pipe is made with a diameter of Φ180mm; the continuous casting round billet is passed through the ring Furnace heating, piercing, five-stand PQF unit rolling, three-stand tube removal machine, micro-tension reduction, step-type cooling bed cooling, quenching and tempering treatment, the outer diameter is ...

Embodiment 2

[0063] An embodiment of the present invention provides a seamless line pipe, the chemical composition of which is:

[0064] C 0.14%, Si 0.20%, Mn 1.30%, S 0.001%, P 0.01%, Ti 0.02%, Nb 0.02%, Cr 0.01%, V 0.06%, Al 0.03%, N 0.006%, Ni 0.08%, Cu 0.08 %, Mo 0.002%, As 0.0058%, Sn 0.0032%, the rest is Fe and unavoidable impurities, Ceq=0.36%.

[0065] The preparation steps of the above-mentioned seamless line pipe are as follows:

[0066] Using scrap steel as raw material, through 80t electric arc furnace melting, ladle refining, VD vacuum degassing, and continuous casting process, the continuous casting round billet with the same chemical composition as the above seamless line pipe is made with a diameter of Φ180mm; the continuous casting round billet is passed through the ring Furnace heating, piercing, five-stand PQF unit rolling, three-stand tube removal machine, micro-tension reduction, step-type cooling bed cooling, quenching and tempering treatment, the outer diameter is 1...

Embodiment 3

[0081] An embodiment of the present invention provides a seamless line pipe, the chemical composition of which is:

[0082]C 0.16%, Si 0.15%, Mn 1.40%, S 0.003%, P 0.005%, Ti 0.01%, Nb 0.04%, Zr 0.010%, Cr 0.005%, V 0.003%, Al 0.022%, N 0.002%, Ni 0.08 %, Cu 0.04%, Mo 0.01%, As 0.0065%, Sn 0.0028%, the rest is Fe and unavoidable impurities, Ceq=0.39%.

[0083] The preparation steps of the above-mentioned seamless line pipe are as follows:

[0084] Using scrap steel as raw material, through 80t electric arc furnace melting, ladle refining, VD vacuum degassing, and continuous casting process, the continuous casting round billet with the same chemical composition as the above seamless line pipe is made with a diameter of Φ180mm; the continuous casting round billet is passed through the ring Furnace heating, piercing, five-stand PQF unit rolling, three-stand tube removal machine, micro-tension reduction, step-type cooling bed cooling, quenching and tempering treatment, the outer ...

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Abstract

The invention discloses a high-performance seamless pipeline tube and a preparation method thereof. The pipeline tube comprises the following components in percentage by weight: larger than or equal to 0.13% and smaller than or equal to 0.16% of C, larger than or equal to 0.15% and smaller than or equal to 0.35% of Si, larger than or equal to 1.25% and smaller than or equal to 1.40% of Mn, smallerthan or equal to 0.005% of S, smaller than or equal to 0.01% of P, larger than or equal to 0.01% and smaller than or equal to 0.03% of Ti, larger than or equal to 0.02% and smaller than or equal to 0.04% of Nb, smaller than or equal to 0.08% of V, larger than or equal to 0.02% and smaller than or equal to 0.04% of Al, smaller than or equal to 0.006% of N, smaller than or equal to 0.1% of Cr, smaller than or equal to 0.08% of Ni, smaller than or equal to 0.08% of Cu, smaller than or equal to 0.01% of Mo, larger than or equal to 0.03% and smaller than or equal to 0.05% of Nb+V/2, smaller than or equal to 0.01% of As+Sn, and the balance of Fe and inevitable impurities, wherein the carbon equivalent is smaller than or equal to 0.41%. Ti and Nb are added, V is selectively added for alloying, and the pipeline tube which is high in comprehensive performance and low in cost is successfully prepared.

Description

technical field [0001] The invention relates to the technical field of seamless line pipe manufacturing, in particular to a high-performance seamless line pipe and a preparation method thereof. Background technique [0002] According to the prediction of international authoritative organizations, from 2000 to 2030, the world's oil demand will increase by an average of 1.6% annually, and will reach 5.769 billion tons in 2030; the demand for natural gas will increase by an average annual rate of 2.4%, and will reach 4.203 billion tons of oil equivalent in 2030 . Pipeline transportation is the most reasonable way to realize efficient, economical, safe and pollution-free transportation of oil and gas. With the rapid growth of the demand for oil and natural gas, the demand for line pipes used in the construction of oil and gas pipelines will increase day by day. In 2017, my country's oil import dependence on foreign countries was close to 70%, far exceeding the so-called intern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/12C22C38/06C22C38/16C22C38/28C22C38/26C22C38/24C22C38/22C22C38/20C22C38/50C22C38/48C22C38/46C22C38/44C22C38/42C21D8/10C21D1/18
CPCY02P10/20
Inventor 邓叙燕
Owner DALIPAL PIPE
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