文章信息/Info

Title:

Research Status on Removal Technology of Ceramic Core for Hollow Blades

作者:

王飛1; 李飛1; 余建波2; 孫寶德1; 3

（1. 上海市先進高溫材料及其精密成形重點實驗室，上海 200240）（2. 上海大學材料科學與工程學院 上海市現代冶金和材料制備重點實驗室，上海 200072）（3. 上海交通大學 金屬基復合材料國家重點實驗室，上海 200240）

Author(s):

WANG Fei1;  LI Fei1;  YU Jianbo2;  SUN Baode1; 3

(1. Shanghai Key Laboratory of Advanced High�瞭emperature 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)

關鍵詞:

陶瓷型芯; 脫芯工藝; 空心葉片; 物理-化學脫芯; 熔模鑄造

Keywords:

ceramic core;  leach technology;  hollow blade;  physical�瞔hemical removal technology;  investment casting

DOI:

10.7502/j.issn.1674-3962.2019.03.08

文獻標志碼:

A

摘要:

隨著對航空發動機和燃氣輪機熱效率需求的不斷提升，渦輪葉片的耐高溫能力顯得愈發重要。通過預置陶瓷型芯在葉片內形成復雜氣冷內通道進而提高葉片的冷卻效率，成為了先進燃氣渦輪葉片制造的關鍵技術。燃氣進口溫度的不斷提高使葉片的冷卻結構由傳統方式發展為高效發散冷卻和層板冷卻，陶瓷型芯的制造工藝也向形狀更復雜、尺寸更小的方向發展。概述了陶瓷型芯脫芯技術的研究現狀和重要意義。系統闡述了化學脫芯和物理�不瘜W脫芯的工藝特點，其中包括化學介質和脫芯工藝參數。重點介紹了機械攪拌、氣體攪拌、超聲波攪拌、脫芯液噴射和液電效應等外加物理作用對脫芯反應連續性和脫芯速率的影響。分析了新脫芯工藝下，脫芯設備的制造與維護所面臨的問題和挑戰。

Abstract:

With the improvement of the demand for the thermal efficiency of the gas turbine, high�瞭emperature 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�瞔hemical 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�瞖lectric effect on continuity and rata of removal reaction. The challenges of manufacturing and maintenance of removal equipment were finally discussed.