Preparation for material resistant to aluminum water corrosion and having nonstick aluminum characteristics
A technology of water erosion and non-stick aluminum, which is applied in the field of preparation of casting nozzle materials, can solve the problems that the corrosion resistance and non-sticking aluminum characteristics of casting nozzle materials are not reflected, and increase the fluidity of aluminum water, so as to improve the resistance to aluminum water erosion With the characteristics of not hanging on aluminum, the effect of increasing corrosion resistance and good processing performance
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Embodiment 1
[0026] Take 40% Al 2 o 3 , 60%SiO2 2 100kg of ceramic fiber, 15kg of alumina powder, 1kg of silicon nitride whisker, 3kg of mullite whisker, 1kg of fumed silica powder, 2kg of barium chloride, 15kg of silica sol (12kg of water), 0.2kg of carboxymethyl cellulose , 1.3kg of starch, 600kg of water, put the materials into a dispersing machine, stir and disperse fully, and prepare a uniform water-based dispersion.
[0027] Put the above-mentioned homogeneously mixed aqueous dispersion into a multi-directional self-priming press, set the vacuum degree to -0.075Mpa, and the pressure to 2Mpa for molding. Dry the formed nozzle material at room temperature for 5 hours, put it in a drying oven, and raise the temperature to 150°C at a heating rate of 0.5°C / min, and the drying time is 6 hours.
[0028] Send the dried nozzle material into the sintering equipment for calcination. The temperature rise rate is controlled at 1°C / min, and the temperature is raised to 850°C. It is kept for 10 ...
Embodiment 2
[0030] Take 55% Al 2 o 3 , 45%SiO2 2 150kg of ceramic fiber, 25kg of alumina powder, 4kg of silicon nitride whisker, 6kg of mullite whisker, 0.8kg of fumed silica powder, 1kg of barium chloride, 1kg of barium nitrate, 20kg of aluminum sol (water content 15kg), hydroxypropyl Grade methyl cellulose 0.1kg, starch 2kg, water 1000kg, put the materials into a disperser, stir and disperse fully, and prepare a uniform water-based dispersion.
[0031] Put the above-mentioned homogeneously mixed aqueous dispersion into a multi-directional self-priming press, set the vacuum degree to -0.079Mpa, and the pressure to 5Mpa for molding. Dry the molded nozzle material at room temperature for 12 hours, put it in a drying oven, raise the temperature to 125°C at a rate of 2°C / min, and dry for 16 hours.
[0032] Send the dried nozzle material into the sintering equipment for calcination. The temperature rise rate is controlled at 2°C / min, and the temperature is raised to 950°C, kept for 5 hours...
Embodiment 3
[0034] Take 65% Al 2 o 3 , 35%SiO2 2 120kg of ceramic fiber, 18kg of alumina powder, 5kg of silicon nitride whisker, 3kg of mullite whisker, 1kg of fumed silica powder, 1.5kg of barium carbonate, 15kg of silica-alumina sol (containing 10kg of water), carboxymethyl cellulose 0.8kg, 0.5kg of starch, and 800kg of water, put the materials into a dispersing machine, stir and disperse fully, and prepare a uniform water-based dispersion.
[0035] Put the above-mentioned homogeneously mixed aqueous dispersion into a multi-directional self-priming press, set the vacuum degree to -0.082Mpa, and the pressure to 7.2Mpa for molding. Dry the molded nozzle material at room temperature for 16 hours, put it in a drying oven, raise the temperature to 120°C at a heating rate of 1.5°C / min, and dry for 15 hours.
[0036] Send the dried nozzle material into the sintering equipment for calcination. The temperature rise rate is controlled at 3°C / min, and the temperature is raised to 850°C, kept fo...
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