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.
关键词
受控扩散凝固/凝固过程控制/近净成形/非枝晶演化
Key words
Controlled Diffusion Solidification/Solidification Process Control/Near-net-shape Casting/Non-dendritic Conversion
维普
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