摘要
综述了近年来规则共晶和非规则反常共晶转变的理论和实验的研究进展。对于规则共晶的形成的研究已趋于成熟,建立了能较好预测实验结果的理论模型;对于非规则反常共晶的形成,目前已获得大量的实验数据,涵盖生长方式,生长速率,生长形态,空间分布和组织粗化等行为,但在模型描述和预测仍不完善,形成机理仍存争议。然而,由于实际工业合金成分的复杂性,共晶凝固理论至今实际应用仍偏少。因而,如何通过实验和理论研究相结合,将共晶点成分理论松弛到整幅相图范围,二元合金凝固理论拓展到多元合金体系,将理论与最新技术条件相结合应用到工业生产中,仍是凝固理论研究的努力方向。
The theoretical and experimental advances in regular eutectic and irregular anomalous eutectic transformation theory in recent years were reviewed. The research on the formation of regular eutectic was becoming mature and the theoretical model which can predict the experimental results was established. For the formation of irregular anomalous eutectic, a large number of experimental data had been obtained, including growth mode, growth rate, growth morphology,spatial distribution and microstructure coarsening. However, the model description and prediction were still incomplete, and the formation mechanism was still controversial. On the contrary, due to the complexity of the composition of industrial alloys, eutectic solidification theory had not been widely used. As a results, how to combine experimental and theoretical research, relax the eutectic point composition theory to the whole phase diagram, expand the solidification theory of binary alloy to the multi-alloy system, and apply the theory with the latest technical conditions to industrial production is still the direction of solidification theory research.
作者
杨恬
许军锋
李卓
坚增运
YANG Tian;XU Junfeng;LI Zhuo;JIAN Zengyun(The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices,Xi'an Technological University,Xi'an 710021,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《铸造技术》
CAS
2020年第2期192-196,共5页
Foundry Technology
基金
国家自然科学基金资助项目(51971166)
陕西省教育厅重点实验室项目(18JS050)
凝固技术国家重点实验室项目(SKLSP201812)
关键词
规则共晶
非规则共晶
共晶转变
regular eutectic
irregular eutectic
eutectic transformation
