Development of X80M hot-rolled steel plate for LSAW pipe

Zhai Dongyu; Du Haijun; Wu Junping; Jiang Jinxing; Liu Shuai

doi:10.7513/j.issn.1004-7638.2021.01.021

Volume 42 Issue 1

Feb. 2021

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Zhai Dongyu, Du Haijun, Wu Junping, Jiang Jinxing, Liu Shuai. Development of X80M hot-rolled steel plate for LSAW pipe[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 131-138. doi: 10.7513/j.issn.1004-7638.2021.01.021

Citation:

Zhai Dongyu, Du Haijun, Wu Junping, Jiang Jinxing, Liu Shuai. Development of X80M hot-rolled steel plate for LSAW pipe[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 131-138. doi: 10.7513/j.issn.1004-7638.2021.01.021

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Development of X80M hot-rolled steel plate for LSAW pipe

doi: 10.7513/j.issn.1004-7638.2021.01.021

Technology Research and Development Department,Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu, China

Received Date: 2020-05-13
Publish Date: 2021-02-10

Abstract

Abstract

In order to meet the requirements for annual transportation of 45 billion cubic meters of the China-Russian Eastern Line and the demand for construction of major national pipelines in extremely cold regions at −40 ℃, NISCO has tested and developed Φ1422 mm×32.1 mm straight seam submerged arc welded pipeline steel plates which have high strength and toughness. The high cleanliness casting slabs with narrow composition fluctuation range and low organization rating C0.5 were obtained by metallurgical thermodynamic temperature control and protective casting methods. The industrial test verified the TMCP rolling process. The microstructure is composed of small amount of eutectoid ferrite+acicular ferrite+bainite+M/A island soft/hard phase, which meets the high strength and toughness requirements of X80M steel plate. The strength and toughness performance indicators meet the requirements of pipeline technical specifications and meet mass industrial production of steel for low-temperature and large-volume pipelines.
- hot-rolled steel plate,
- pipe,
- straight seam submerged arc welded,
- multiphase composite microstructure,
- toughness

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References(9)

References

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