(北京有色金屬研究總院，北京 100088
北京科技大學，北京 100083)
摘 要: 根據(jù)噴射成型的工藝過程特點，研究了噴射成型制備的高硅鋁合金圓錠凝固組織。結(jié)果表明：噴射成型過程中，在沉積坯件的上表面存在一個有一定尺寸的液態(tài)金屬熔池；沉積坯件的凝固組織與粉末凝固組織有明顯差別：沉積坯件整體上呈逐層凝固，但不同部位的微觀組織隨凝固速度的不同而有明顯區(qū)別。
關鍵字: 噴射成型 凝固進程 液態(tài)金屬熔池
（Beijing General Research Institute for Nonferrous Metals, Beijing 100088, P. R. China）
Abstract:Based on the characteristic of spray forming process, the solidification progress of the Al-23Si-5Fe alloy billet made by spray forming process was studied. The results showed that there is a metal melt pool on the top surface of the preform in the spray forming process, the microstructure of the over-sprayed powders and the preform are different, namely the microstructures of the preform change in different regions corresponding to different heat input and output rates.
Key words: spray forming; solidification progress; metal melt pool
