Ruthenium-containing multi-component TiAl alloy suitable for temperature of 800 DEG C
A multi-component and alloy technology, applied in the field of ruthenium-containing multi-component TiAl alloy, can solve the problem of increasing the service temperature of multi-component TiAl alloy, which has not yet been seen, and achieve the effect of improving high-temperature performance and saving costs
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Embodiment 1
[0025] The composition of the present embodiment alloy is Ti-48Al-4Nb-2Cr-1.0Ru alloy, and specific implementation method is as follows: (1) sponge titanium, high-purity aluminum, aluminum-chromium master alloy, aluminum-niobium master alloy and high-purity ruthenium powder are formulated (2) Put the raw material weighed in step 1 into a vacuum non-consumable arc melting furnace; (3) After each smelting is completed, turn over and continue smelting, repeating 4 times to ensure the uniformity of the ingredients. The SEM photo of the as-cast structure of Ti-48Al-4Nb-2Cr-1.0Ru alloy is as follows figure 1 As shown, it is mainly composed of α 2 / γ lamellar clusters, with Ru-rich B2 phase and fine granular τ at the boundary and inside of the lamellar clusters 1 phase out. These tiny tau 1 Phase can be used as the second phase particle strengthened alloy.
Embodiment 2
[0027] The composition of the present embodiment alloy is Ti-48Al-4Nb-2Cr-0.3Ru alloy, and specific implementation method is as follows: (1) sponge titanium, high-purity aluminum, aluminum-chromium master alloy, aluminum-niobium master alloy and high-purity ruthenium powder are formulated according to (2) Put the raw material weighed in step 1 into a vacuum non-consumable arc melting furnace; (3) After each smelting is completed, turn over and continue smelting, repeating 4 times to ensure the uniformity of the ingredients. The SEM photo of the as-cast structure of Ti-48Al-4Nb-2Cr-0.3Ru alloy is as follows figure 2 As shown, it is mainly composed of α 2 / γ lamellar group structure, because the alloying elements are completely dissolved, no precipitated phase in Example 1 is seen at the boundary and inside of the lamella group.
Embodiment 3
[0029] The composition of present embodiment alloy is Ti-47Al-4Nb-2Cr-0.5Ru alloy, and specific implementation method is as follows: (1) sponge titanium, high-purity aluminum, aluminum-niobium master alloy and high-purity ruthenium powder are weighed by proportioning; ( 2) Put the raw materials weighed in step 1 into a vacuum non-consumable arc melting furnace; (3) After each smelting, turn over and continue smelting, repeating 4 times to ensure the uniformity of the ingredients. The SEM photo of the as-cast structure of Ti-47Al-4Nb-2Cr-0.5Ru alloy is as follows image 3 As shown, similar to Example 1, its organization is mainly composed of α 2 / γ lamellar group structure, Ru-rich phase precipitates at the boundary and inside of the lamella group, but its content is obviously lower than that of the alloy described in Example 1.
[0030] The service temperature of the Ti-48Al-4Nb-2Cr alloy without adding Ru element is below 750°C. Comparing it with the alloys prepared in the a...
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