Research Progress in Solidification and Regulation Mechanism of Controlled Diffusion Solidification Process
It is crucial to use casting process to form alloy system with large liquid-solid interval to refine the primary structure effectively and inhibit thermal cracking.In contrast to conventional solidification,Controlled diffusion solidifi-cation(CDS)can effectively solve the problem of thermal cracking during the near-net-shape casting of deformed alu-minum alloys and simplify the process to provide the possibility of industrial application.The research progress in CDS process mechanism was reviewed,and the key events were summarized including mixing,redistribution of temperature and solute fields,three types of nucleation,and influence of process parameters such as precursor alloy temperature,initial mass ratio and mixing rate on the non-dendritic conversion rate of CDS were concluded.Finally,the problems exsiting in CDS solidification and regulation mechanism were presented,and the future development direction was prospected.
Controlled Diffusion SolidificationSolidification Process ControlNear-net-shape CastingNon-dendritic Conversion
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维普
