Preparation method for aluminum electrolysis inert anode of ceramic housing and alloy inner core
A technology of alloy inner core and ceramic outer shell, which is applied in the field of preparation of aluminum electrolytic inert anodes, can solve the problems of decreased bonding strength, difficulty in connecting special-shaped parts, long process, etc., and achieve the effect of improving high temperature creep resistance
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Embodiment 1
[0046] The prepared ceramic alloy powder is pressed into an inert anode green shell by isostatic pressing, in which the ceramic phase content accounts for 55%, the metal phase content accounts for 45%, and the ceramic phase composition is 70% NiFe 2 o 4 + 20%NiO+10%Fe 2 o 3 , the metal phase composition is 60%Cu+20%Ni+10%Fe, and the pressed anode casing is precisely processed into a shape by mechanical processing. The shape of the alloy inner core is cast by vacuum induction melting. The composition of the alloy inner core is 50% Cu, 30% Ni, 10% Fe, 8% Cr, 2% Al. During the melting process, the vacuum degree is controlled at 1 ~10Pa. Put the prepared alloy inner core into the ceramic alloy shell green body, and then put them together into a high-temperature sintering furnace, raise the temperature to 1100°C at 2°C / min, and install a heat preservation step every 200°C, and each heat preservation step is insulated 1h, when the temperature rises to 1200°C, keep warm for 2h to...
Embodiment 2
[0048] The prepared ceramic alloy powder is pressed into an inert anode green shell by isostatic pressing, in which the ceramic phase content accounts for 60%, the metal phase content accounts for 40%, and the ceramic phase composition is 67% NiFe 2 o 4 + 15%NiO+10%Fe 2 o 3 +8%ZnO 3 , the metal phase composition is 60%Cu+40%Ni, and the pressed anode casing is precisely processed into a shape by mechanical processing. The shape of the alloy inner core is cast by vacuum induction melting. The composition of the alloy inner core is 74%Cu, 18%Ni, 12%Fe, 6%Cr. During the melting process, the vacuum degree is controlled at 1~10Pa. Put the prepared alloy inner core into the ceramic alloy shell green body, and then put them together into a high-temperature sintering furnace, raise the temperature to 1100°C at 2°C / min, and install a heat preservation step every 200°C, and each heat preservation step is insulated 1h, when the temperature rises to 1180°C, keep it warm for 2h to fully...
Embodiment 3
[0050] The prepared ceramic alloy powder is pressed into an inert anode green shell by isostatic pressing, in which the ceramic phase content accounts for 66%, the metal phase content accounts for 34%, and the ceramic phase composition is 70% NiFe 2 o 4 + 20%NiO+10%CuO, the metal phase composition is 50%Cu+45%Ni+5%Ti, the pressed anode casing is precisely processed into a shape by machining. The shape of the alloy inner core is cast by vacuum induction melting. The composition of the alloy inner core is 47%Cu, 28%Ni, 13%Fe, 8%Cr, 3%Sn, 2%Mn. During the melting process, the vacuum is controlled The degree is 1~10Pa. Put the prepared alloy inner core into the ceramic alloy shell green body, and then put them together into a high-temperature sintering furnace, raise the temperature to 1100°C at 2°C / min, and install a heat preservation step every 200°C, and each heat preservation step is insulated 1h, when the temperature rises to 1220°C, keep warm for 2h to fully soften, and at...
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