Device and method for deep supercooled directional solidification with multi-mode excitation
A technology of directional solidification and deep supercooling, which is applied in the direction of improving process efficiency, etc., can solve the problems of in-situ melting plus directional solidification, complex process, single excitation method, etc., and achieve low microscopic component segregation, sufficient melting, Less defects such as shrinkage cavities
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Embodiment 1
[0102] 1. Prepare 1kg of 302 stainless steel (1Cr18Ni9) alloy raw material and put it into the crucible; according to B 2 o 3 、Na 2 B 4 o 7 The ratio is 1:1 to prepare glass purifier and put it into the feeding spoon.
[0103] 2. Turn on the vacuum pump 8 to pump the sealed chamber to 1×10 -6 Pa, then fill the sealed chamber with high-purity argon to 0.8×10 5 Pa, repeat this process five times. Start the smelting device 2 and increase the heating power, observe the melting condition of the alloy through the thermometer 3, and keep the temperature for 30 minutes after the alloy is completely melted.
[0104] 3. Add the glass purifier into the crucible through the feeding device 4, heat the sample to overheat 250K and keep it warm for 10 minutes, then turn off the power of the melting device 2, and repeat the above steps five times after the sample is cooled to room temperature.
[0105] 4. When the alloy temperature drops to 50K supercooling degree, start the power suppl...
Embodiment 2
[0108] 1. Prepare 5kg of Monel K500 nickel-based alloy raw material and put it into a crucible; put B 2 o 3 Add glass cleaner to the spoon.
[0109] 2. Turn on the vacuum pump 8 to pump the sealed chamber to 1×10 -6 Pa, then fill the sealed chamber with high-purity helium to 1×10 5 Pa, repeat this process three times. Start the smelting device 2 and increase the heating power, observe the melting situation of the metal through the thermometer 3, and keep the temperature for 30 minutes after the metal is completely melted.
[0110] 3. Add the glass purifier into the crucible through the feeding device 4, heat the sample to overheat 300K and keep it warm for 20 minutes, then turn off the power supply of the melting device 2, and repeat the above steps six times after the sample is cooled to room temperature.
[0111] 4. When the alloy temperature drops to 230K supercooling degree, start the power supply of the pulling device 7, pull down the crucible at a rate of 1mm / s and j...
Embodiment 3
[0114] 1. Prepare 0.01kg of metal raw material according to the atomic ratio of Ti, Ni, Al, and Cr as 14:3:2:1, and put it into the crucible; 2 , B 2 o 3 , CaO, Al 2 o 3 、Na 2 O, K 2 The ratio of O is 5:2:2:1:1:1 to prepare glass purifier and put it into the feeding spoon.
[0115] 2. Turn on the vacuum pump 8 to pump the sealed chamber to 1×10 -6 Pa, then fill the sealed chamber with a mixture of high-purity helium and argon at a ratio of 1:3 to 0.5×10 5 Pa, repeat this process three times. Start the smelting device 2 and increase the heating power, observe the melting situation of the metal through the thermometer 3, and keep the temperature for 10 minutes after the metal is completely melted.
[0116] 3. Add the glass purifier into the crucible through the feeding device 4, heat the sample to overheat 100K and keep it warm for 5 minutes, then turn off the power of the melting device 2, and repeat the above steps twice after the sample is cooled to room temperature. ...
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