Relationship between growth rate of interfacial reaction layer and carbon content in solder/carbon steel system

Abstract

Reaction behavior of Fe and carbon steels in molten Sn-3.0%Ag-0.5%Cusolder was investigated. The thickness of the reaction layer was foundto increase parabolically with immersion time at 623 and 673 K for Feand 0.2% carbon steel. At 723 K, the thickness was found to increaselinearly with immersion time. The growth of the reaction layer betweensolder and 0.4% and 0.6% carbon steels becomes very slow at 723K withthe progress time. This is attributed to the formation of cementitephase at the interface.