Influence of molten FeS on the mechanical properties of structural steels

Abstract

One of the primary defects of weld joints is crystallization cracks. In the welding of structural steels, with an increase in sulfur content in the metal of the joint, its sensitivity to the formation of crystallization cracks increases sharply as a result of formation of low-melting sulfide eutectics. In the literature there is little data on the influence of molten nonmetallic materials on the mechanical properties of solid metals, and the influence of molten low-melting metals has been studied at temperatures not exceeding 1100K. With an increase in temperature, this influence weakens, and at high temperatures the effect may even completely disappear. The purpose of this study was an investigation of the influence of molten FeS on the plasticity and strength of solid metals at 1373K.