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Effect of MnS precipitation on solute equilibrium partition coefficients in high sulfur steel during solidification

Published online by Cambridge University Press:  05 June 2018

Lintao Gui ,
Mujun Long ,
Huabiao Chen ,
Dengfu Chen ,
Huamei Duan ,
Yunwei Huang  and
Tao Liu
Lintao Gui
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Mujun Long*
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Huabiao Chen*
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Dengfu Chen*
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Huamei Duan
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Yunwei Huang
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Tao Liu
Affiliation:
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

The solute equilibrium partition coefficients (ki) of C, Si, Mn, P, and S in high sulfur steel during the solidification process were investigated by the thermodynamic calculation. The effect of MnS precipitation on ki was explored. The results showed that the precipitation of MnS inclusion would influence the concentrations of solutes Mn and S, leading to the changing of ki. Due to the precipitation of MnS, the kC and kS decreased first and then increased with temperature decreasing, while kSi, kMn, and kP changed monotonously. The impacts of solidification temperature on kSi and kMn were greater than that on kC, kS, and kP. With the increase of S content, kC, kSi, and kP increased while kMn and kS decreased. Whereas, an opposite effect was found with the increase of Mn content. The order of influence extent by S and Mn contents was kSi > kS > kMn > kC > kP.

Keywords

equilibrium partition coefficientMnS precipitationhigh sulfur steelsolidification
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 20 , 29 October 2018 , pp. 3490 - 3500
Copyright
Copyright © Materials Research Society 2018 

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