Vacuum induction smelting process of Ti-Ni and Ti-Ni-Nb marmem
A technology of memory alloy and vacuum induction, which is applied in the field of vacuum metallurgy, can solve the problems of affecting the cold working performance of high-temperature deformed materials, affecting the performance of alloy phase transition point, and affecting the performance of alloy phase transition point and performance, so as to achieve excellent high-temperature deformation performance and equipment The effect of low cost and convenient operation
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Embodiment 1
[0019] CaO crucible is used to prepare Ti-Ni alloy. The specific process is: charging→vacuumizing→alloy melting period→alloy refining period→alloy liquid condensation→adjusting temperature and pouring alloy ingot. The operation steps are as follows:
[0020] 1. Charging of alloy raw materials: take the raw material 0 according to the weight ratio of Ti44Ni56 # -Ti and 1 # -Ni, the charging sequence is: Ni and 20% Ti are loaded into the crucible, and the remaining 80% Ti and strong deoxidizer Ca are added into the alloy hopper;
[0021] 2. Vacuuming: when the pressure in the furnace is evacuated to 1.5Pa, fill it with argon to 0.03MPa;
[0022] 3. Alloy melting: power transmission, melting and loading of raw materials in the crucible, when the material in the crucible is melted, add the remaining 80% Ti to the crucible, stirring intermittently; the purpose of stirring is to prevent the low-density Ti from floating on the surface after melting The upper part of the alloy liqui...
Embodiment 2
[0041] The difference from Example 1 is:
[0042] To prepare Ti-Ni-Nb alloy, the operation steps are as follows:
[0043] 1. Charging of alloy raw materials: take raw material 1 according to weight ratio Ti36.96-Ni48.38-Nb14.66 # -Ni, Nb-1, 0 # -Ti, the charging sequence is: Ni, Nb and 20% of Ti are loaded into the crucible, and the remaining 80% of Ti and strong deoxidizer Ca are added into the alloy hopper;
[0044] 2. Vacuuming: when the pressure in the furnace is evacuated to 1.2Pa, fill it with argon to 0.05MPa;
[0045] 3. Alloy melting: power transmission, melting and loading of raw materials in the crucible, when the material in the crucible is melted, add the remaining 80% Ti to the crucible, stirring intermittently; the purpose of stirring is to prevent the low-density Ti from floating after melting The upper part of the alloy liquid reacts with the crucible;
[0046] 4. Alloy refining: After clearing, the alloy liquid is refined at a temperature higher than the ...
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