真空自耗电弧熔炼铸锭凝固行为多尺度模拟研究进展

Vacuum arc remelting (VAR) is the principal remelting process for producing high-quality Ti-based alloy and Ni-based superalloy ingots with high density, fine chemical homogeneity, and minimal defects. Numerical modeling plays a crucial role in understanding the mechanisms and dynamics of various phenomena occurring at different scales during the VAR process. It also aids in optimizing operational parameters. In this paper, the development of multiscale simulations for VAR ingot solidification over the last two decades is introduced. The following four aspects are addressed: numerical models at various scales, macroscopic transport phenomena, microstructure and defect evolution, and the effects of process control parameters on the VAR ingot quality. Furthermore, the current limitations in this field and proposed future development directions are discussed.