Effect of directional solidification of electroslag remelting on the microstructure and primary carbides in an austenitic hot-work die steel

The microstructure of as-cast ingot and three-dimensional microstructure of carbides were analyzed by optical microscope and scanning electron microscope. The types of carbides were identified by X-ray diffraction. Directional solidification of electroslag remelting effectively reduced the segregation of alloying elements in as-cast ingot. The growing direction of dendrites in as-cast ingot refined by directional solidification of electroslag...