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Manufacturing method of crucible for vacuum induction melting of high-temperature alloy
The invention provides a manufacturing method of a crucible for vacuum induction melting of a high-temperature alloy; the manufacturing method comprises the steps: 1) preparing a raw material by mixing fused alumina zirconia having the particle size of 1-4 mm, fused alumina zirconia having the particle size of 0.1-1 mm, fused alumina zirconia having the particle size of less than 0.1 mm, bimodal activated alpha-alumina and nanocrystalline alpha-alumina with the mass percentage of (15-40):(15-40):(15-40):(3-8):(3-8), and then mixing the raw material with ammonium polyacrylate and a binder to obtain a slurry, wherein the addition amounts of ammonium polyacrylate and the binder are respectively 0.5-2% and 5-15% of the total mass of the raw material; 2) adding a water-soluble azo or piperidine initiator with the amount of 0.1-0.3% of the total mass of the slurry into the slurry, and mixing for 3-10 min at the temperature of 2-30 DEG C; 3) carrying out vacuum degassing on the slurry obtained in the step 2) for 5 min at the temperature of 2-30 DEG C, and then immediately pouring into a crucible forming mold; 4) heating together with the mold to 45-55 DEG C, keeping for 5-35 min, then demolding, and drying a crucible blank at room temperature; and 5) placing the crucible blank at the temperature of 1500-1650 DEG C, keeping for more than 3 h, then cooling to room temperature, and thus obtaining the target object. The crucible prepared by the method has low content of impurity elements during melting of the high-temperature alloy.
Manufacturing method of crucible for vacuum induction melting of high-temperature alloy
The invention provides a manufacturing method of a crucible for vacuum induction melting of a high-temperature alloy; the manufacturing method comprises the steps: 1) preparing a raw material by mixing fused alumina zirconia having the particle size of 1-4 mm, fused alumina zirconia having the particle size of 0.1-1 mm, fused alumina zirconia having the particle size of less than 0.1 mm, bimodal activated alpha-alumina and nanocrystalline alpha-alumina with the mass percentage of (15-40):(15-40):(15-40):(3-8):(3-8), and then mixing the raw material with ammonium polyacrylate and a binder to obtain a slurry, wherein the addition amounts of ammonium polyacrylate and the binder are respectively 0.5-2% and 5-15% of the total mass of the raw material; 2) adding a water-soluble azo or piperidine initiator with the amount of 0.1-0.3% of the total mass of the slurry into the slurry, and mixing for 3-10 min at the temperature of 2-30 DEG C; 3) carrying out vacuum degassing on the slurry obtained in the step 2) for 5 min at the temperature of 2-30 DEG C, and then immediately pouring into a crucible forming mold; 4) heating together with the mold to 45-55 DEG C, keeping for 5-35 min, then demolding, and drying a crucible blank at room temperature; and 5) placing the crucible blank at the temperature of 1500-1650 DEG C, keeping for more than 3 h, then cooling to room temperature, and thus obtaining the target object. The crucible prepared by the method has low content of impurity elements during melting of the high-temperature alloy.
Manufacturing method of crucible for vacuum induction melting of high-temperature alloy
YIN FENGSHI (Autor:in) / HUANG LIANCHAO (Autor:in) / YIN HUIFANG (Autor:in) / ZHOU LI (Autor:in)
22.07.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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