Sulfide-forming Tendency of Alloying Elements in Steel

Abstract

The order of carbide-forming tendency of alloying elements in steel is of importance for explanation of the behaviour of carbide phases in alloy steels. In the same way of thinking, the sulfide-forming tendency of alloying elements in steel would be a considerable factor affecting the nature of sulfide phases in alloy steels. The present study was designed to determine the sulfide-forming tendency of individual elements in steel, and arrived at the conclusion that the tendency would be as the following order:(This article is not displayable. Please see full text pdf.) The above order was decided by chemical analysis of the individual elements in sulfide phases isolated electrolytically from sulfer-rich and carbon-free alloy steels.Ni, Co and Si have a less tendency than iron to combine as sulfide, and these elements are found only a few in iron sulfide or FeS.Those with strong or moderately strong tendency concentrate into sulfide phases, and form the special sulfides, such as ZrS, TiS, MnS, NbS, VS, CrS and Al2S3.