共晶凝固组织形态和扩散长大问题(一)  

Microstructures Morphology and Problems of Diffusion Growing for Eutectic Solidification(1)

作　　者：朱祖昌[1] 杨弋涛[2] 吴旭炜 王洪 

机构地区：[1]上海工程技术大学,上海201620 [2]上海大学,上海200072 [3]上海市机械制造工艺研究所有限公司,上海200070

出　　处：《热处理技术与装备》2016年第2期75-80,共6页Heat Treatment Technology and Equipment

摘　　要：从凝固界面结构和Jackson模型以及凝固前沿温度梯度对晶体生长形态影响出发论述共晶组织形态类型。特别说明不规则典型合金Al-Si和Fe-C系共晶组织形态的变化。并推导层片状共晶长大扩散场的解析解和说明共晶片间距的影响因素。Proceeding with the liquid / solid interface structure,Jackson model and the influence of temperature gradient at solidification front on crystalline growth morphology,the eutectic microstructure morphologies have been discussed. Particularly,the variatuon of eutectic microstructure morphologies of typical anomalous Al-Si and Fe-C alloys have been shown. Moreover,the analytic solution for growth diffusion field of lamellar eutectic and the effect factors of eutectic lamellar space have been made.

关 键 词：共晶组织 凝固 FE-C合金 AL-SI合金 共晶长大扩散场 

分 类 号：TG111.4[金属学及工艺—物理冶金]