空心叶片用陶瓷型芯脱芯工艺研究现状-中国材料进展

文章信息/Info

Title:: Research Status on Removal Technology of Ceramic Core for Hollow Blades

作者:: 王飞1; 李飞1; 余建波2; 孙宝德1; 3; （1. 上海市先进高温材料及其精密成形重点实验室，上海 200240）（2. 上海大学材料科学与工程学院上海市现代冶金和材料制备重点实验室，上海 200072）（3. 上海交通大学金属基复合材料国家重点实验室，上海 200240）

Author(s):: WANG Fei1; LI Fei1; YU Jianbo2; SUN Baode1; 3; (1. Shanghai Key Laboratory of Advanced Hightemperature Materials and Precision Forming, Shanghai Jiao Tong University, Shanghai 200240, China)(2. Shanghai Key Laboratory of Modem Metallurgy and Materials Processing School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China)(3. The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China)

Keywords:: ceramic core; leach technology; hollow blade; physicalchemical removal technology; investment casting

摘要:: 随着对航空发动机和燃气轮机热效率需求的不断提升，涡轮叶片的耐高温能力显得愈发重要。通过预置陶瓷型芯在叶片内形成复杂气冷内通道进而提高叶片的冷却效率，成为了先进燃气涡轮叶片制造的关键技术。燃气进口温度的不断提高使叶片的冷却结构由传统方式发展为高效发散冷却和层板冷却，陶瓷型芯的制造工艺也向形状更复杂、尺寸更小的方向发展。概述了陶瓷型芯脱芯技术的研究现状和重要意义。系统阐述了化学脱芯和物理化学脱芯的工艺特点，其中包括化学介质和脱芯工艺参数。重点介绍了机械搅拌、气体搅拌、超声波搅拌、脱芯液喷射和液电效应等外加物理作用对脱芯反应连续性和脱芯速率的影响。分析了新脱芯工艺下，脱芯设备的制造与维护所面临的问题和挑战。

Abstract:: With the improvement of the demand for the thermal efficiency of the gas turbine, hightemperature tolerance of turbine blade becomes more important. It has been one of the key techniques to use the ceramic core to form complex air cooling channels to improve cooling efficiency in the manufacturing of turbine blade. The cooling structure of the turbine blade evolves from traditional ways to efficient divergent cooling and lamellar tablet cooling. The structure of the ceramic core gets increasingly complex. The research status and significance of removal technologies of ceramic core were summarized. The progress in the investigation on chemical and physicalchemical removal technology of ceramic core, including chemical intermediate and technology parameters during the removal process of the core was systematically reviewed in this paper. The paper focused on the effect of outer physical fields such as mechanical stirring, gas stirring, ultrasound stirring, liquid spraying and liquidelectric effect on continuity and rata of removal reaction. The challenges of manufacturing and maintenance of removal equipment were finally discussed.