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材料研究学报  2010, Vol. 24 Issue (5): 525-529    
  研究论文 本期目录 | 过刊浏览 |
快速凝固Fe--Co合金中的亚稳相
刘宁1,2, 杨根仓2, 刘峰2, 杨长林2
1.江苏科技大学机械冶金学院 张家港 215600
2.西北工业大学凝固技术国家重点实验室 西安 710072
Metastable Phase in Rapid Solidification of Fe--Co Alloy
LIU Ning1,2,  YANG Gencang2,  LIU Feng2,  YANG Changlin2
1.Jiangsu University of Science and Technology, School of Machine and Metallurgy, Zhangjiagang 215600
2.State Key Lab. of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072
引用本文:

刘宁 杨根仓 刘峰 杨长林 . 快速凝固Fe--Co合金中的亚稳相[J]. 材料研究学报, 2010, 24(5): 525-529.
, , , . Metastable Phase in Rapid Solidification of Fe--Co Alloy[J]. Chin J Mater Res, 2010, 24(5): 525-529.

全文: PDF(801 KB)  
摘要: 采用熔融玻璃净化和循环过热相结合的方法, 研究了Fe--Co合金在深过冷快速凝固中的亚稳相。结果表明, 当熔体的过冷度达到某一临界数值(?Tcrit)时, 亚稳相(b.c.c)在竞争形核中优先形核生长, 并在随后的冷却过程中保留在凝固组织中。在γ单相区内等温退火3 h后, 亚稳相完全转变为稳定相;在过冷Fe--Co合金的凝固组织中亚稳相是“竞争形核--重熔--γ相外延生长--不完全固态相变”的产物。
关键词 金属材料  快速凝固  Fe--Co合金  深过冷  竞争形核  亚稳相    
Abstract:The rapid solidification of undercooled Fe--Co alloy was investigated by combining cycle superheating and molten fluxing purification technology. The results show that metastable phase nucleated primarily only when the critical undercooling was achieved. After 3 h isothermal annealing in single phase γ region, metastable phase was transferred to stable phase completely. Finally, metastable phase in as--solidified microstructure of undercooled Fe--Co alloys can be described as a result of “competitive nucleation-- remelting-- extensive growth of  γ phase--incomplete solid state transformation”
Key wordsmetallic materials    rapid solidification    Fe--Co alloy     undercooled    competitive nucleation    metastable phase
收稿日期: 2010-06-17     
ZTFLH: 

TG244

 
基金资助:

国家自然科学基金50501020, 50771084资助项目。

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