Reliability Increase of Dissimilar Steel Welded Joints

Abstract

In this paper combined Hadfield steel - stainless steel - rail steel compounds are considered. Structural studies and estimation of mechanical properties showed that using an intermediate layer of low-carbon steel with 0.2 C wt. % and 5-20 mm thick between high-carbon steel and chromium-nickel steel in the formation of welded joints increases the reliability of connections by reducing the amount of high-strength zones as compared to compounds without a barrier layer.

Simulation of Structure Formation Processes of Dissimilar Steels Welded Joints Using an Intermediate Layer

“…It should be noted that while a reliable weld joint is made in the first case, in the second case brittle martensitic layers are formed in the welded joint between high-carbon steel and a chrome-nickel insert which greatly reduce the fracture toughness. To solve this problem, the authors [28,29] suggested using inserts from low-carbon steel between high-carbon and chrome-nickel steels, which should limit mutual diffusion of carbon and alloying elements, thereby reducing the probability of the formation of martensite in the joint.…”