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X80 pipeline steel plate for conveying coal-derived natural gas and manufacturing method thereof

A coal-to-natural gas and manufacturing method technology, applied in the field of X80 pipeline steel plates for coal-to-natural gas transportation and its manufacturing, can solve problems such as complex procedures, increased manufacturing costs, and reduced productivity, so as to reduce production costs, realize safe use, The effect of excellent anti-acid performance

Inactive Publication Date: 2018-11-02
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is complicated, which increases the manufacturing cost and reduces the productivity

Method used

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  • X80 pipeline steel plate for conveying coal-derived natural gas and manufacturing method thereof
  • X80 pipeline steel plate for conveying coal-derived natural gas and manufacturing method thereof
  • X80 pipeline steel plate for conveying coal-derived natural gas and manufacturing method thereof

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Embodiment Construction

[0042] Below in conjunction with specific embodiment the present invention is further described:

[0043] The technical problems involved in the present invention are solved by the following technical solutions: X80 pipeline steel plate for transporting coal to natural gas and its manufacturing method, its chemical composition mass percentage is: C0.019%~0.059%, Si 0.15%~0.45%, Mn0. 55%~1.85%, Cu≤0.50%, Cr≤0.50%, Ni≤0.50%, Mo 0.05%~0.35%, Nb 0.03%~0.12%, V0.01%~0.04%, Ti 0.008%~0.024%, Al 0.01%~0.04%, P≤0.010%, S≤0.005%, and S+P+O+N+H≤0.015%, the rest is Fe and unavoidable impurities. Before continuous casting, add Si-Ca line treatment to RH. During continuous casting, control the superheat of molten steel at 15-25°C, control the light reduction rate between 2%-5%, and the casting speed at 0.8-2.0m / min ; After continuous casting, the continuous casting slab is slowly cooled for 45 to 50 hours, and the central segregation of the casting slab is low-magnification rating C class...

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Abstract

The invention discloses an X80 pipeline steel plate for conveying coal-derived natural gas and a manufacturing method thereof. Steel comprises 0.019%-0.059% of C, 0.15%-0.45% of Si, 0.55%-1.85% of Mn,0-0.50% of Cu, 0-0.50% of Cr, 0-0.50% of Ni, 0.05%-0.35% of Mo, 0.03%-0.12% of Nb, 0.01%-0.04% of V, 0.008%-0.024% of Ti, 0.01%-0.04% of Al, 0-0.010% of P, 0-0.005% of S, and the balance Fe and unavoidable impurities, and S+P+O+N+H<=0.015%. The superheat degree of molten steel is 15-25 DEG C, the soft reduction rate is 2%-5%, and the drawing speed is 0.8-2.0 m / min. Two-section heating is adopted,rough rolling starting temperature is larger than or equal to 1000 DEG C, fine rolling starting temperature is 800-900 DEG C, fine rolling finish temperature is 750-850 DEG C, cooling starting temperature is 710-770 DEG C, cooling finish temperature is 460-600 DEG C, and the cooling speed is 5-20 DEG C / s. the steel plate has good strength, toughness and HIC resistance.

Description

technical field [0001] The invention relates to a steel product and a manufacturing method thereof, in particular to an X80 pipeline steel plate for transporting coal to natural gas and a manufacturing method thereof. Background technique [0002] As the recoverable amount of conventional oil and natural gas resources is decreasing day by day, unconventional shale gas, coalbed methane and coal-derived natural gas resources as supplementary alternative resources are attracting more and more attention. In particular, the scale of commercialization of coal-to-natural gas is expanding day by day, and the output is increasing year by year. Coal-to-natural gas is an important commercial product of coal chemical industry. It has the advantages of high thermal energy utilization rate and good economic benefits in conjunction with coal-to-oil, direct liquefaction of raw coal, thermal power generation and other coal utilization methods. [0003] Compared with conventional natural gas...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/08C22C38/14C22C38/16C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/58C21D8/02
CPCC22C38/02C21D8/0226C21D2211/005C22C38/04C22C38/06C22C38/08C22C38/14C22C38/16C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/58
Inventor 刘文月任毅徐烽张帅应传涛王爽高红
Owner ANGANG STEEL CO LTD
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