Micro-segregation of Solutes in Tin-Containing Ferritic Stainless Steel

doi:10.12068/j.issn.1005-3026.2015.04.011

Abstract

Abstract: Combined a micro-segregation model with Thermao-calc software， the segregation condition of tin-containing ferritic stainless steel was studied in which the precipitation of MnS was considered. The effects of C， Mn， S， P， and Cr on the interdendritic segregation， zero strength temperature (ZST)， and zero ductility temperature (ZDT) of steel were discussed. The segregation of tin in ferritic steel and low-carbon steel was analyzed， the plastic trough phenomenon in the hot-working process of low-carbon steel was explained and the improvement of plasticity by adding tin was studied. The results showed that the segregation ratio of Sn is much higher than that of other elements except for P and S， and Mn restrains the solidification segregation of S. Tin trends to segregate to grain boundary and the segregation ratio of tin in austenite is much higher than that in ferrite.

Key words: tin, ferritic stainless steel, micro-segregation, segregation ratio, internal crack

CLC Number:

TF02

LI Yang， HAN Ji-peng， JIANG Zhou-hua， HE Pan. Micro-segregation of Solutes in Tin-Containing Ferritic Stainless Steel[J]. Journal of Northeastern University Natural Science, 2015, 36(4): 502-507.

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