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A platform for research: civil engineering, architecture and urbanism
Silicon oxide-based ceramic core for large-size directional hollow blade of heavy-duty gas turbine and preparation of silicon oxide-based ceramic core
The invention relates to a silicon oxide-based ceramic core for a large-size directional hollow blade of a heavy gas turbine and a preparation method of the silicon oxide-based ceramic core. The silicon oxide-based ceramic core adopts quartz glass powder as a base material, and adopts zircon powder, alumina powder and calcium oxide powder as mineralizing agents. The powder comprises the following components in percentage by weight: 60-95% of quartz glass powder, 1-30% of zircon powder, 0.5-5% of alumina powder and 0.1-5% of calcium carbonate powder. Paraffin, beeswax, polyethylene and polyethylene glycol are used as plasticizers for hot-press injection molding. The preparation method comprises the following steps: ball-milling and uniformly mixing the powder materials, putting the powder materials into a molten plasticizer for mixing, and carrying out hot-press injection molding on a ceramic core molding machine. A quartz glass rod/tube is pre-arranged in the position, corresponding to the thick and large section of the mold core, in the mold core mold before pressure injection, and the ceramic mold core formed through hot pressure injection molding is put into a box-type resistance furnace to be roasted after being trimmed and corrected. The silicon oxide-based ceramic core prepared by the invention has the characteristics of high high-temperature strength, good creep resistance, small firing shrinkage, stable size and high core removal efficiency.
本发明涉及一种重型燃机大尺寸定向空心叶片用氧化硅基陶瓷型芯及制备方法，该氧化硅基陶瓷型芯使用的基体材料为石英玻璃粉，矿化剂为锆英粉、氧化铝粉和氧化钙粉。粉料中按重量百分比含石英玻璃粉60％～95％，锆英粉1％～30％，氧化铝粉0.5％～5％，碳酸钙粉0.1％～5％。以石蜡、蜂蜡、聚乙烯和聚乙二醇为热压注成型增塑剂。制备方法为把上述粉料球磨混合均匀，放入熔化的增塑剂中混炼，在陶瓷型芯成型机上热压注成型。压注前在型芯模具中对应型芯截面厚大的位置预置石英玻璃棒/管，热压注成型的陶瓷型芯经修整、校型后放入箱式电阻炉中焙烧。本发明制备的氧化硅基陶瓷型芯具有高温强度高、抗蠕变性能好、烧成收缩小、尺寸稳定、脱芯效率高的特征。
Silicon oxide-based ceramic core for large-size directional hollow blade of heavy-duty gas turbine and preparation of silicon oxide-based ceramic core
The invention relates to a silicon oxide-based ceramic core for a large-size directional hollow blade of a heavy gas turbine and a preparation method of the silicon oxide-based ceramic core. The silicon oxide-based ceramic core adopts quartz glass powder as a base material, and adopts zircon powder, alumina powder and calcium oxide powder as mineralizing agents. The powder comprises the following components in percentage by weight: 60-95% of quartz glass powder, 1-30% of zircon powder, 0.5-5% of alumina powder and 0.1-5% of calcium carbonate powder. Paraffin, beeswax, polyethylene and polyethylene glycol are used as plasticizers for hot-press injection molding. The preparation method comprises the following steps: ball-milling and uniformly mixing the powder materials, putting the powder materials into a molten plasticizer for mixing, and carrying out hot-press injection molding on a ceramic core molding machine. A quartz glass rod/tube is pre-arranged in the position, corresponding to the thick and large section of the mold core, in the mold core mold before pressure injection, and the ceramic mold core formed through hot pressure injection molding is put into a box-type resistance furnace to be roasted after being trimmed and corrected. The silicon oxide-based ceramic core prepared by the invention has the characteristics of high high-temperature strength, good creep resistance, small firing shrinkage, stable size and high core removal efficiency.
本发明涉及一种重型燃机大尺寸定向空心叶片用氧化硅基陶瓷型芯及制备方法，该氧化硅基陶瓷型芯使用的基体材料为石英玻璃粉，矿化剂为锆英粉、氧化铝粉和氧化钙粉。粉料中按重量百分比含石英玻璃粉60％～95％，锆英粉1％～30％，氧化铝粉0.5％～5％，碳酸钙粉0.1％～5％。以石蜡、蜂蜡、聚乙烯和聚乙二醇为热压注成型增塑剂。制备方法为把上述粉料球磨混合均匀，放入熔化的增塑剂中混炼，在陶瓷型芯成型机上热压注成型。压注前在型芯模具中对应型芯截面厚大的位置预置石英玻璃棒/管，热压注成型的陶瓷型芯经修整、校型后放入箱式电阻炉中焙烧。本发明制备的氧化硅基陶瓷型芯具有高温强度高、抗蠕变性能好、烧成收缩小、尺寸稳定、脱芯效率高的特征。
Silicon oxide-based ceramic core for large-size directional hollow blade of heavy-duty gas turbine and preparation of silicon oxide-based ceramic core
重型燃机大尺寸定向空心叶片用氧化硅基陶瓷型芯及制备
LIU XIAOFU (author) / LOU YANCHUN (author) / XIE HUASHENG (author) / GUO XINLI (author) / SHUI GUOYAN (author) / JIN LEI (author) / SEKI HIROSHI (author)
2022-03-29
Patent
Electronic Resource
Chinese
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