Effect of Sulphur on Solidification Cracking in Weld Metal of Steel (Report 2) : Theoretical Investigation on Change in Liquid Composition among Primary Crystals during Weld Solidification and on New Parameter Replacing Mn/S in Fe-S-Mn Alloy Steel

概要

論文の詳細を見る
The effect of sulphur and manganese on the weld solidification crack in steel is usually discussed in terms of a parameter Mn/S ratio. The parameter Mn/S, however, is considered to be ambiguous in the metallurgical meaning though it is conventionally and experimentally used. On the other hand the solidification crack is closely related with the microsegregation of sulphur and manganese during the solidification. For these reasons, the change in liquid composition among cells or cellular dendrites during the weld solidification of Fe-S-Mn alloy steel is discussed using Pfann's equation in this report. Further, by analyzing the relation between the change in liquid composition theoretically deduced and the Fe-S-Mn phase diagram, a new parameter is derived. The enw parameter is shown as Mn^3/S in the case where δ phase solidifies, or Mn^5/S in the case where γ phase solidifies.
社団法人溶接学会の論文