Thermodynamic analysis on typical inclusions in pipeline steel

YU Jian; LI Jing; WANG Fu-ming; FU Jie; YASEN·Abulikemu

doi:10.13374/j.issn1001-053x.2009.s1.018

Volume 31 Issue S1

Aug. 2021

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YU Jian, LI Jing, WANG Fu-ming, FU Jie, YASEN·Abulikemu. Thermodynamic analysis on typical inclusions in pipeline steel[J]. Chinese Journal of Engineering, 2009, 31(S1): 95-99. doi: 10.13374/j.issn1001-053x.2009.s1.018

Citation:

YU Jian, LI Jing, WANG Fu-ming, FU Jie, YASEN·Abulikemu. Thermodynamic analysis on typical inclusions in pipeline steel[J]. Chinese Journal of Engineering, 2009, 31(S1): 95-99. doi: 10.13374/j.issn1001-053x.2009.s1.018

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Thermodynamic analysis on typical inclusions in pipeline steel

doi: 10.13374/j.issn1001-053x.2009.s1.018

School of Metallurgical and Ecological engineering, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2009-09-30
Available Online: 2021-08-09

Abstract

Abstract

The relationship between calcium activity (α_[Ca]) and aluminum content was analyzed by thermodynamic calculation to guarantee inclusions in liquid region after calcium treatment for X80 pipeline steel, and the α_[Ca] ranges were determined to obtain liquid calcium-aluminates inclusions. The effect of relationship between[Al] and[S] on the forming of CaS and the effect of temperature on the precipitation of CaS were calculated quantificationally. The results show that when the mass percent of sulfur is 20×10^-6, the CaS solubility in calcium-aluminates can reach 0.18%.
- pipeline steel,
- calcium treatment,
- calcium-aluminates,
- CaS