ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Solubility Products of Titanium Sulphide and Carbosulphide in Ultra-low Carbon Steels
Xiaohong YangDirk VanderschuerenJozef DilewijnsChristian StandaertYvan Houbaert
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1996 Volume 36 Issue 10 Pages 1286-1294


The equilibrium precipitation behaviour of Ti stabilised interstitial free steels was studied quantitatively. The solubility products of TiS and Ti4C2S2 in austenite were determined with dissolution experiments. The results are as follows

log[Ti][S]=T-13975 +5.43
log[Ti][C]0.5[S]0.5=T-17045 +7.9

The calculated results using these solubility products agree well with other experimental results of steels not involved in the dissolution experiments. The solubility products obtained in the current work were compared with other published solubility products of TiS and Ti4C2S2 using all khown experimental data from different sources to the knowledge of the authors, and it was shown that the solubility products determined in the current work provided the best fittings with the experimental results. The influence of reheating time on the precipitation state in the steels was also investigated. It was shown that at high temperatures (e.g. 1150°C) equilibrium state of precipitates can be reached within one hour during reheating.

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