Method for preparing tial alloy plate without sheath
A technology of alloy plate and sheath, which is applied in the field of preparing TiAl alloy plate without sheath, can solve the problems of low raw material utilization rate, easy introduction of impurities, high processing cost, etc., and achieve the effect of solving reaction melting, simplifying process and avoiding surface oxidation
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Embodiment 1
[0037] The preparation method of Ti-45Al-8Nb alloy plate is as follows:
[0038] (1) Weighing raw materials: according to the atomic percentage of each element, the composition is 45% Al, 8% Nb, and the balance is Ti and unavoidable impurities. A total of 10,000 g of titanium sponge, pure aluminum, and an aluminum-niobium alloy (with a Nb content of 54.56%) were weighed as raw materials.
[0039] (2) Melting ingots: Add the sponge titanium, pure aluminum and aluminum-niobium alloy weighed in step 1 into a water-cooled copper crucible induction melting furnace for melting, and the vacuum degree is 3.0×10 -3 mbar; then poured into ZrO preheated at 600°C 2 In the ceramic mold, a rectangular ingot is obtained.
[0040] (3), billet pretreatment:
[0041] a. Remove the riser from the TiAl alloy ingot and perform hot isostatic pressing treatment. The treatment process is 1260 ° C, 150 MPa, protected by argon atmosphere, kept for 4 hours, and cooled out of the furnace with the furn...
Embodiment 2
[0053] The preparation method of Ti-43Al-9Nb-0.3Y alloy plate is as follows:
[0054] (1) Weighing raw materials: according to the atomic percentage of each element, the composition is 43% Al, 9% V, 0.3% Y, the balance is Ti and unavoidable impurities. Sponge titanium, pure aluminum, aluminum yttrium alloy (Y content is 87.3%) and aluminum vanadium alloy (V content is 52.12%) totaling 10000g were weighed as raw materials.
[0055] (2) Melting ingots: Add the sponge titanium, pure aluminum and aluminum-niobium alloy weighed in step 1 into a water-cooled copper crucible induction melting furnace for melting, and the vacuum degree is 1.0×10 -3 mbar; then poured into ZrO preheated at 500°C 2 In the ceramic mold, a rectangular ingot is obtained.
[0056] (3), billet pretreatment:
[0057] a. Remove the riser from the TiAl alloy ingot and perform hot isostatic pressing treatment. The treatment process is 1250 ° C, 150 MPa, protected by argon atmosphere, kept for 4 hours, and cool...
Embodiment 3
[0069] The preparation method of Ti-44Al alloy plate is as follows:
[0070] (1) Weighing the raw material: 44% Al according to the atomic percentage of each element, and the balance being Ti and unavoidable impurities. A total of 10,000 g of titanium sponge and pure aluminum were weighed as raw materials.
[0071] (2) Melting ingots: Add the sponge titanium, pure aluminum and aluminum-niobium alloy weighed in step 1 into a water-cooled copper crucible induction melting furnace for melting, and the vacuum degree is 2.0×10 -3 mbar; then poured into 300℃ preheated Al 2 o 3 In the ceramic mold, a rectangular ingot is obtained.
[0072] (3), billet pretreatment:
[0073] a. Remove the riser from the TiAl alloy ingot and perform hot isostatic pressing treatment. The treatment process is 1250 ° C, 160 MPa, protected by argon atmosphere, kept for 4.5 hours, and cooled with the furnace;
[0074] b. Perform near-γ treatment on the ingot, and place the ingot in a vacuum heat treatm...
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