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Granular mullite for high-temperature precision casting and manufacturing method thereof
The invention discloses granular mullite for high-temperature precision casting and a manufacturing method thereof, the granular mullite for high-temperature precision casting is prepared from material powder, the material powder comprises a mixture composed of industrial alumina and high-purity silicon oxide, the industrial alumina accounts for 71.8% of the mixture, and the powder further comprises rare earth oxide accounting for 1%-5% of the total weight of the powder. The invention relates to a manufacturing method of granular mullite for high-temperature precision casting. The manufacturing method comprises the following steps: 1) selecting materials, wherein industrial aluminum oxide comprises more than 98% of Al2O3 and less than 0.5% of Na2O, high-purity silicon oxide comprises more than 99% of SiO2, less than 0.03% of Fe2O3 and more than or equal to 99.95% of rare earth oxide; and (2) smelting: uniformly mixing powder consisting of industrial aluminum oxide, high-purity silicon oxide and rare earth oxide, and then adding the mixture into an electric arc furnace for smelting machining. By adopting the granular mullite for high-temperature precision casting and the manufacturing method thereof, the problems that high-temperature alloy precision casting requires isotropy of a high-temperature mold shell and sand burning of a casting are solved; and the excellent high-temperature thermodynamic and chemical properties of mullite are fully exerted.
本发明公开了一种高温精密铸造用颗粒状莫来石及其制造方法，(该高温精密铸造用颗粒状莫来石)由料粉制成，所述料粉包括工业氧化铝和高纯氧化硅组成的混合物，其中工业氧化铝占该混合物的71.8％，所述料粉还包括占粉料总重量1％～5％的稀土氧化物。一种高温精密铸造用颗粒状莫来石的制造方法，包括以下步骤：1)选材：工业氧化铝：Al2O3>98％，Na2O<0.5％、高纯氧化硅：SiO2>99％，Fe2O3<0.03％、稀土氧化物：≥99.95％；2)冶炼：将工业氧化铝、高纯氧化硅和稀土氧化物组成的料粉混合均匀，然后加入电弧炉中进行冶炼加工，本高温精密铸造用颗粒状莫来石及其制造方法，解决了高温合金精密铸造要求高温模壳各向同性和铸件粘砂的难题，充分发挥了莫来石优良的高温热力学、化学性能。
Granular mullite for high-temperature precision casting and manufacturing method thereof
The invention discloses granular mullite for high-temperature precision casting and a manufacturing method thereof, the granular mullite for high-temperature precision casting is prepared from material powder, the material powder comprises a mixture composed of industrial alumina and high-purity silicon oxide, the industrial alumina accounts for 71.8% of the mixture, and the powder further comprises rare earth oxide accounting for 1%-5% of the total weight of the powder. The invention relates to a manufacturing method of granular mullite for high-temperature precision casting. The manufacturing method comprises the following steps: 1) selecting materials, wherein industrial aluminum oxide comprises more than 98% of Al2O3 and less than 0.5% of Na2O, high-purity silicon oxide comprises more than 99% of SiO2, less than 0.03% of Fe2O3 and more than or equal to 99.95% of rare earth oxide; and (2) smelting: uniformly mixing powder consisting of industrial aluminum oxide, high-purity silicon oxide and rare earth oxide, and then adding the mixture into an electric arc furnace for smelting machining. By adopting the granular mullite for high-temperature precision casting and the manufacturing method thereof, the problems that high-temperature alloy precision casting requires isotropy of a high-temperature mold shell and sand burning of a casting are solved; and the excellent high-temperature thermodynamic and chemical properties of mullite are fully exerted.
本发明公开了一种高温精密铸造用颗粒状莫来石及其制造方法，(该高温精密铸造用颗粒状莫来石)由料粉制成，所述料粉包括工业氧化铝和高纯氧化硅组成的混合物，其中工业氧化铝占该混合物的71.8％，所述料粉还包括占粉料总重量1％～5％的稀土氧化物。一种高温精密铸造用颗粒状莫来石的制造方法，包括以下步骤：1)选材：工业氧化铝：Al2O3>98％，Na2O<0.5％、高纯氧化硅：SiO2>99％，Fe2O3<0.03％、稀土氧化物：≥99.95％；2)冶炼：将工业氧化铝、高纯氧化硅和稀土氧化物组成的料粉混合均匀，然后加入电弧炉中进行冶炼加工，本高温精密铸造用颗粒状莫来石及其制造方法，解决了高温合金精密铸造要求高温模壳各向同性和铸件粘砂的难题，充分发挥了莫来石优良的高温热力学、化学性能。
Granular mullite for high-temperature precision casting and manufacturing method thereof
一种高温精密铸造用颗粒状莫来石及其制造方法
ZHONG WENJIAN (author) / LIN NANYANG (author)
2021-10-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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