Solubility products for Ti inclusions in austenite of low carbon steels (including interstitial free - IF steel) have been calculated and compared qualitatively. Results show that without considering effect of other factors
at 950 ~ 1 250 ℃
the TiN has minimum solubility product and the TiC has maximum solubility product while that of TiS and Ti
4
C
2
S
2
are mediums. It indicates that at high temperature the initial precipitate should be TiN