复杂陶瓷型芯增材制造及浇注工艺验证

doi:10.3901/JME.2021.03.227

机械工程学报 ›› 2021, Vol. 57 ›› Issue (3): 227-234.doi: 10.3901/JME.2021.03.227

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复杂陶瓷型芯增材制造及浇注工艺验证

胡可辉^1,2, 吕志刚^1,2, 陆宽³, 梁静静⁴

1. 清华大学摩擦学国家重点实验室北京 100084;
2. 清华大学机械工程系北京 100084;
3. 北京十维科技有限责任公司北京 100092;
4. 中国科学院沈阳金属材料研究所沈阳 110016

收稿日期:2020-02-11 修回日期:2020-10-14 出版日期:2021-02-05 发布日期:2021-03-16
通讯作者: 吕志刚(通信作者),男,1972年出生,博士,研究员,博士研究生导师。主要研究方向为熔模精密铸造、陶瓷增材制造。E-mail:lvzg@tsinghua.edu.cn
作者简介:胡可辉,女,1991年出生,博士,助理研究员。主要研究方向为陶瓷增材制造。E-mail:hukehui@tsinghua.edu.cn
基金资助:
国家重点研发计划资助项目（2018YFB1106600）。

Additive Manufacturing of Complex Ceramic Cores and Verification of Casting Process

HU Kehui^1,2, Lü Zhigang^1,2, LU Kuan³, LIANG Jingjing⁴

1. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084;
2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084;
3. Beijing Ten Dimensions Technology Co., Ltd., Beijing 100092;
4. Institute of Metal Materials, Chinese Academy of Sciences, Shenyang 110016

Received:2020-02-11 Revised:2020-10-14 Online:2021-02-05 Published:2021-03-16

摘要/Abstract

摘要： 针对多层内腔空心涡轮叶片用复杂陶瓷型芯，研究基于光固化的陶瓷型芯增材制造方法。采用光敏树脂与熔融石英粉混制的陶瓷浆料，通过DLP增材制造设备进行陶瓷型芯坯体制备，再经过脱脂烧结工艺获得可用于实际浇注的陶瓷型芯。光敏树脂活性单体选用1，6-己二醇二丙烯酸酯（1，6-hexanediol diacrylate，HDDA）和乙氧化季戊四醇四丙烯酸酯（Ethoxylated pentaerythritol tetraacrylate，PPTTA），熔融石英粉体采用400目和1000目的粉体进行级配。坯体分层制造中，发现浆料铺料厚度影响坯体受力，通过调整加料方式、刮刀位置、刮料速度，实现浆料厚度的准确控制。最终成功制备出高120 mm、宽80 mm的多层复杂结构陶瓷型芯，并在实际工艺条件下进行金属浇注和脱芯验证，力学性能和脱芯性能满足工艺要求。

关键词: 陶瓷型芯, 光固化, 增材制造, 熔模铸造, 涡轮叶片

Abstract: Additive manufacturing technology based on SLA is investigated to produce multi-wall ceramic cores for large-size blades with complex hollow structure. The green part is prepared with DLP printer from ceramic slurry mixed of photoresin and fused silica powder. After debinding and sintering, the ceramic core using for real casting process is fabricated. The resin consisted of 1,6-hexanediol diacrylate(HDDA)and ethoxylated pentaerythritol tetraacrylate(PPTTA). The fused silica had two powder sizes, 400 mesh and 1000 mesh respectively. During the process of printing layer by layer, the stress state of the green part was found to be influenced by the thickness of ceramic coating, which could be optimized by adjusting coating process, blade gap and velocity. A multi-layer ceramic core(height:120 mm, width:80 mm) is eventually created and verified by real casting and core-removing process.

Key words: ceramic core, stereolithography, additive manufacturing, investment casting, gas turbine blade

中图分类号:

TG241

胡可辉, 吕志刚, 陆宽, 梁静静. 复杂陶瓷型芯增材制造及浇注工艺验证[J]. 机械工程学报, 2021, 57(3): 227-234.

HU Kehui, Lü Zhigang, LU Kuan, LIANG Jingjing. Additive Manufacturing of Complex Ceramic Cores and Verification of Casting Process[J]. Journal of Mechanical Engineering, 2021, 57(3): 227-234.

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复杂陶瓷型芯增材制造及浇注工艺验证

Additive Manufacturing of Complex Ceramic Cores and Verification of Casting Process

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