Application Prospect of Integral CaO-Based Ceramic Mold in Investment Casting of Turbine Blades
YANG Qiang 1, 2 , LU Zhongliang 1, 2 , WANG Fu 1, 2 , LI Dichen 1, 2
1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China
摘要涡轮叶片作为航空发动机的第一关键部件，其制造能力已成为衡量一个国家制造水平的重要标志。陶瓷铸型制备是叶片制造的关键环节，铸型材料和制备工艺对叶片制造质量具有直接影响。基于光固化 3D 打印技术的型芯/型壳一体化陶瓷铸型制造技术为复杂空心涡轮叶片的快速制造提供了一种新的工艺方法。CaO具有使用温度高、高温化学稳定性好、热膨胀系数与高温合金相近，且易脱除、价格低廉等优点，是一种理想的铸型材料。分析了氧化钙基陶瓷铸型在涡轮叶片精铸中的优势与存在的问题，介绍了整体式氧化钙基陶瓷铸型制备的研究进展，并探讨了整体式氧化钙基陶瓷铸型在涡轮叶片精铸中的应用前景。
Abstract：The manufacturing technology of turbine blade, which is the first key component of aero-engine, has become an important indicator of a country’s manufacturing level. Ceramic mold preparation is a key step of blade manufacturing because the mold materials and preparation processes have a direct effect on the quality of blade manufacturing. The fabrication technology of core/shell integral ceramic mold based on stereolithography provides a new process for rapid fabrication of complex hollow turbine blades. Calcium oxide (CaO) is an ideal casting mold material with the advantages of high service temperature, good chemical stability at high temperature, similar thermal expansion coefficient to superalloy, easy removal, low price, etc. The advantages and problems of CaO-based ceramic mold in turbine blade investment casting are investigated in this paper, the research progress of the preparation of integral CaO-based ceramic casting is introduced, and the application prospect of integral CaO-based ceramic casting in turbine blade investment casting is discussed.
2022, 
