Growth of lamellar pearlite in the weld zone between dissimilar steels

Abstract

Transmission electron microscopy is used to study the welds between high-carbon pearlitic and chromium–nickel austenitic steel workpieces performed by flash butt welding. It has been established that lamellar pearlite colonies alloyed with chromium and nickel are formed in the weld zones between dissimilar steels. Thin austenite interlayers have been detected in the center of ferrite plates. The structure formed presents the C–F–A–F–C–F–A–F (and so on) sequence of three plate-shaped phases. The ferrite–cementite structure in alloyed-pearlite colonies is finer than that in unalloyed pearlite.