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Sintering method of photocuring silicon-based ceramic core biscuit for investment casting
The invention relates to the field of precision casting, in particular to a sintering method of a photocuring silicon-based ceramic core biscuit for investment casting. The method comprises the following steps: 1, putting a photocuring silicon-based ceramic core biscuit sample into a vacuum heat treatment furnace, keeping a vacuum environment in the furnace, heating to 520-630 DEG C at a heating rate of 0.5-2 DEG C/min for 8-10 hours, and keeping the temperature for 2-3 hours; 2, on the basis of heat preservation in the previous step, continuously heating to 1150-1230 DEG C at the heating rateof 0.8-0.9 DEG C/min for 7.5-9 hours, and carrying out heat preservation for 3.8-4.5 hours; and 3, cooling the silicon-based ceramic core biscuit sample subjected to heat preservation to room temperature along with the furnace. The method is used for precisely casting the hollow engine blade, a novel photocuring 3D printing technology is firstly adopted for manufacturing the ceramic core in the middle process link, sintering treatment is conducted according to the method, and the obtained silicon-based ceramic core is uniform in structure, free of obvious air holes and cracks and excellent inperformance through low-temperature low-speed degreasing and high-temperature low-speed sintering.
本发明涉及精密铸造领域，具体为一种熔模铸造用光固化硅基陶瓷型芯素坯烧结方法。第一步，将光固化硅基陶瓷型芯素坯试样放置于真空热处理炉中，炉内保持真空环境，以0.5～2℃/min的升温速率加热至520℃～630℃之间，升温时间为8～10h，保温2～3h；第二步，在前一步保温之后的基础上，继续0.8～0.9℃/min的升温速率加热至1150℃～1230℃之间，升温时间为7.5～9h，保温3.8～4.5h；第三步，将保温后的硅基陶瓷型芯素坯试样随炉冷却至室温。该方法用于精密铸造空心发动机叶片，在中间工艺环节首先采用了新型光固化3D打印技术制作陶瓷型芯，按照本方法进行烧结处理，通过低温慢速脱脂、高温慢速烧结，获得的硅基陶瓷型芯结构均匀、无明显气孔、裂纹、性能优异。
Sintering method of photocuring silicon-based ceramic core biscuit for investment casting
The invention relates to the field of precision casting, in particular to a sintering method of a photocuring silicon-based ceramic core biscuit for investment casting. The method comprises the following steps: 1, putting a photocuring silicon-based ceramic core biscuit sample into a vacuum heat treatment furnace, keeping a vacuum environment in the furnace, heating to 520-630 DEG C at a heating rate of 0.5-2 DEG C/min for 8-10 hours, and keeping the temperature for 2-3 hours; 2, on the basis of heat preservation in the previous step, continuously heating to 1150-1230 DEG C at the heating rateof 0.8-0.9 DEG C/min for 7.5-9 hours, and carrying out heat preservation for 3.8-4.5 hours; and 3, cooling the silicon-based ceramic core biscuit sample subjected to heat preservation to room temperature along with the furnace. The method is used for precisely casting the hollow engine blade, a novel photocuring 3D printing technology is firstly adopted for manufacturing the ceramic core in the middle process link, sintering treatment is conducted according to the method, and the obtained silicon-based ceramic core is uniform in structure, free of obvious air holes and cracks and excellent inperformance through low-temperature low-speed degreasing and high-temperature low-speed sintering.
本发明涉及精密铸造领域，具体为一种熔模铸造用光固化硅基陶瓷型芯素坯烧结方法。第一步，将光固化硅基陶瓷型芯素坯试样放置于真空热处理炉中，炉内保持真空环境，以0.5～2℃/min的升温速率加热至520℃～630℃之间，升温时间为8～10h，保温2～3h；第二步，在前一步保温之后的基础上，继续0.8～0.9℃/min的升温速率加热至1150℃～1230℃之间，升温时间为7.5～9h，保温3.8～4.5h；第三步，将保温后的硅基陶瓷型芯素坯试样随炉冷却至室温。该方法用于精密铸造空心发动机叶片，在中间工艺环节首先采用了新型光固化3D打印技术制作陶瓷型芯，按照本方法进行烧结处理，通过低温慢速脱脂、高温慢速烧结，获得的硅基陶瓷型芯结构均匀、无明显气孔、裂纹、性能优异。
Sintering method of photocuring silicon-based ceramic core biscuit for investment casting
一种熔模铸造用光固化硅基陶瓷型芯素坯烧结方法
LIANG JINGJING (author) / AN XIAOLONG (author) / LI JINGUO (author) / ZHOU YIZHOU (author) / SUN XIAOFENG (author)
2020-06-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B33Y
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
,
Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern
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