高温合金精密铸造用陶瓷型壳及其与合金界面反应的研究进展

Research Progress of Ceramic Shell for Superalloy Investment Casting and Its Interface Reaction with Alloy

高温合金因优异的高温性能广泛应用于航空发动机和工业燃汽轮机等领域,而制备性能优异的陶瓷型壳是生产精密高温合金铸件的前提。本文归纳了近年来陶瓷型壳制备技术的发展,分别叙述了陶瓷型壳基体材料的选择、黏结剂的影响、纤维材料改性、制备工艺等方面的研究进展以及现存的问题。同时,对于陶瓷型壳与高温合金发生的界面反应进行了分析讨论,总结了界面化学反应机理和润湿性机理,并归纳了陶瓷材料/合金组分元素对界面反应的影响,以及现有研究中存在的不足之处。最后指出基于高温合金精密铸造用陶瓷型壳制备技术未来研究的重点方向。

Because of their superior high-temperature properties,superalloys are widely utilized in aerospace engines and industrial combustion turbines,and ceramic shells are required for the production of superalloy castings.This paper reviews the evolution of ceramic shell preparation technology over the past few years.It discusses the current state of research on the selection of ceramic shell matrix material,the influence of binder,the modification of fiber material,the preparation process,etc.Moreover,it analyzes and discusses the interfacial reaction between ceramic shells and superalloys,summarizes the mechanism of interfacial chemical reaction and wettability,and summarizes the influence of ceramic material/alloy component elements on the interfacial reaction as well as the limitations of existing studies.This paper concludes by identifying the most important directions for future research based on ceramic shell preparation technology for precision casting of superalloy.