中文摘要：

团结微观结构，可溶的砷的谷物边界分离，和充满砷的阶段的特征系统地在 Fe 被调查 -- 作为有不同的砷内容和熄灭的温度的合金。当 Fe-4wt%As 和 Fe-10wt%As 合金的团结微观结构介绍典型树枝状的形态学时，结果证明 Fe-0.5wt%As 合金的团结微观结构由不规则的铁酸盐组成，它与增加砷内容并且熄灭温度变得更好。从 1600 和 1200 牥猠慴敧愠摮 ? 潦 ? 桴瑡爠慥潳 ? 琠敨 ? 慣?敲捡?敬獳眠瑩?在 Fe-0.5wt%As 合金熄灭了慣'R湯椠?桴?潣敫洠瑡楲?桴湡琠灹???愠摮????桴牥'O?潭楶杮映獡整?桴潲杵?桴?潣敫挠湯?吠敨浲摯湹浡捩挠污畣慬楴湯?慨敶猠潨湷琠慨?桴?整灭牥瑡牵?湩整癲污漠? ㈱ 吗？？

英文摘要：

The solidification microstructure, grain boundary segregation of soluble arsenic, and characteristics of arsenic-rich phases were systematically investigated in Fe-As alloys with different arsenic contents and quenching temperatures. The results show that the solidifica- tion microstructures of Fe-0.5wt%As alloys consist of irregular ferrite, while the solidification microstructures of Fe-4wt% As and Fe-10wt%As alloys present the typical dendritic morphology, which becomes finer with increasing arsenic content and quenching temperature. In Fe-0.5wt%As alloys quenched from 1600 and 1200℃, the grain boundary segregation of arsenic is detected by transmission electron microscopy. In Fe-4wt%As and Fe-10wt%As alloys quenched from 1600 and 1420℃, a fully divorced eutectic morphology is observed, and the eutectic Fe2As phase distributes discontinuously in the interdendritic regions. In contrast, the eutecfic morphology of Fe-10wt%As alloy quenched from 1200℃ is fibrous and forms a continuous network structure. Furthermore, the area fraction of the eutectic Fe2As phase in Fe-4wt%As and Fe-10wt%As alloys increases with increasing arsenic content and decreasing quenching temperature.