Studies of electroslag cladding Inconel 52M multilayer

摘要

The current study investigates Inconel 52M multilayer by electroslag cladding. The four-layer multilayer with good formation is obtained. The experimental results indicate that the microstructure of the multilayer consists of numerous coarse columnar dendrites in the same growth direction. Nb rich carbides, the mixture of Al rich oxides and Nb rich carbides and long chains of eutectic phases are precipitated in the interdendritic regions. The significant composition changes merely occur in the limited interface regions between the substrate and the first layer, while the smooth composition changes occur in the 1st layer. Moreover, the microhardness in single layer decreases from the root to the top. The microhardness decrease in the first layer is more significant than that in the other single layer as a result of the composition transitions by the effect of dilution.