Abstract. This study is focused on understanding the effects of key process parameters onset recrystallisation coarse, elongated, and dendritic grains as-cast microstructure during ingot-to-billet conversion, consisting successive cogging, upsetting, reheating operations, in type 316 austenitic stainless steel. The microstructural characteristics initial ingot (e.g., size, orientation morpholog...

Steel ingot with a large height-to-diameter ratio is utilized to produce multiple products by one stock in practice. Water cooling usual way enhance production efficiency. However, the combination of two factors will generate internal defects, such as shrinkage porosity and hot crack. The characteristic crack 10 t water-cooled steel was examined an ultrasonic test. A slice sectioned from middle...

A large-scale ingot of Zr-1Mo alloy was produced for industrial manufacturing to investigate whether it is possible to produce an ingot with homogeneity. The homogeneous ingot with a chemical composition of Zr-1mass%Mo was prepared successfully. The microstructure, mechanical properties, and magnetic susceptibility were evaluated. The microstructure showed a coarse colony structure of a plate-l...

In the present work macrosegregation during solidification of a 2.45 ton steel ingot is simulated with pure equiaxed model, which was tested previously via modeling benchmark experiment. While columnar structure not taken into account, packed layer formed over inner walls mold at an early stage reproduces to some extent phenomena generally related zones dendrites. Furthermore, it demonstrated t...