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Manufacturing method of corundum crucible for vacuum induction melting of high-temperature alloys
The invention provides a manufacturing method of a corundum crucible for vacuum induction melting of high-temperature alloys. The manufacturing method comprises the following steps: 1) preparing an alumina raw material by mixing tabular corundum having the particle size of 1-4mm, tabular corundum having the particle size of 0.1-1mm, tabular corundum having the particle size of less than 0.1mm, double-peak alpha-alumina and nanocrystalline alpha-alumina together in the mass ratio of (15-40): (15-40): (15-40): (3-8): (3-8), and then evenly mixing the alumina raw material with a dispersant and a binder in the mass ratio of 100: (0.5-2): (5-15) to obtain an alumina slurry; 2) adding an initiator accounting for 0.1-0.3% of the total weight of the alumina slurry to the alumina slurry and mixing at 2-30 DEG C for 3-10 minutes; 3) degassing the alumina slurry obtained in the step 2) in vacuum at 2-30 DEG C for 5 minutes and immediately pouring into a crucible forming mold; 4) heating the whole mold to the range of 45-55 DEG C and keeping for 5-35 minutes, and then demolding and drying at a room temperature; 5) putting the dryed crucible blank at a temperature ranging from 1500 to 1650 DEG C for more than 3 hours, and then cooling to the room temperature to obtain the target. When the crucible is adopted to melt the high-temperature alloys, the content of impurity elements is low.
Manufacturing method of corundum crucible for vacuum induction melting of high-temperature alloys
The invention provides a manufacturing method of a corundum crucible for vacuum induction melting of high-temperature alloys. The manufacturing method comprises the following steps: 1) preparing an alumina raw material by mixing tabular corundum having the particle size of 1-4mm, tabular corundum having the particle size of 0.1-1mm, tabular corundum having the particle size of less than 0.1mm, double-peak alpha-alumina and nanocrystalline alpha-alumina together in the mass ratio of (15-40): (15-40): (15-40): (3-8): (3-8), and then evenly mixing the alumina raw material with a dispersant and a binder in the mass ratio of 100: (0.5-2): (5-15) to obtain an alumina slurry; 2) adding an initiator accounting for 0.1-0.3% of the total weight of the alumina slurry to the alumina slurry and mixing at 2-30 DEG C for 3-10 minutes; 3) degassing the alumina slurry obtained in the step 2) in vacuum at 2-30 DEG C for 5 minutes and immediately pouring into a crucible forming mold; 4) heating the whole mold to the range of 45-55 DEG C and keeping for 5-35 minutes, and then demolding and drying at a room temperature; 5) putting the dryed crucible blank at a temperature ranging from 1500 to 1650 DEG C for more than 3 hours, and then cooling to the room temperature to obtain the target. When the crucible is adopted to melt the high-temperature alloys, the content of impurity elements is low.
Manufacturing method of corundum crucible for vacuum induction melting of high-temperature alloys
YIN FENGSHI (Autor:in) / YIN HUIFANG (Autor:in) / HUANG LIANCHAO (Autor:in) / ZHOU LI (Autor:in)
24.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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