Er-containing high-niobium Ti-Al intermetallic compound material and preparation method thereof
An intermetallic compound, high niobium technology, applied in the intermetallic compound material, Er-containing high niobium TiAl intermetallic compound material and its preparation field
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[0016] Example 1
[0017] The preparation of the Er-containing high-niobium TiAl intermetallic compound material of this embodiment is achieved by the following steps: 1. Weigh the following raw materials: sponge titanium, high-purity aluminum, aluminum-niobium master alloy and aluminum-erbium master alloy, of which Ti45.8at.% , Al46at.%, Nb8at.%, Er0.2at.%; 2. Add the raw materials weighed in step 1 into the water-cooled copper crucible vacuum induction melting furnace. The layers from bottom to top are respectively sponge titanium layer and high Pure aluminum layer, aluminum-niobium intermediate alloy layer, aluminum-erbium intermediate alloy layer and sponge titanium layer; 3. Before smelting, preheat the metal mold at a temperature of 350℃, and evacuate the water-cooled copper crucible vacuum induction melting furnace to 3.0× 10 -3 mbar; 4. Increase the smelting power of the water-cooled copper crucible vacuum induction melting furnace to 180kw at a growth rate of 10kw / min, t...
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[0019] Example 2
[0020] (1) Weigh the following raw materials: sponge titanium, high-purity aluminum, aluminum-niobium master alloy and aluminum-erbium master alloy; among them, control the molar percentage of Al, Nb, Er and Ti to 41%~46% Al, 8~10% Nb, 0.2-0.4% Er, the balance Ti and impurities;
[0021] (2) The raw materials weighed in step (1) are added into a water-cooled copper crucible vacuum induction melting furnace in layers. The layers from bottom to top are sponge titanium layer, high-purity aluminum layer, aluminum-niobium intermediate alloy layer, aluminum Erbium master alloy layer and sponge titanium layer; preheat the metal mold to 300~350℃ before smelting, and vacuum the water-cooled copper crucible vacuum induction melting furnace to 2.0~3.0×10 -3 mbar, increase the smelting power of the water-cooled copper crucible vacuum induction melting furnace to 160-180kw at a growth rate of 5-10kw / min, then stop increasing the power, and then smelt at a constant power for 1...
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