Multi-component high-alloying high-Nb-TiAl intermetallic compound

An intermetallic compound and alloying technology, which is applied in the field of new multi-component high alloyed high Nb-TiAl alloy materials and multi-component high alloyed high Nb-TiAl intermetallic compounds, can solve the problem of poor thermal processing performance and material Problems such as low utilization rate and restrictions on large-scale engineering applications

Active Publication Date: 2019-11-29
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problems to be solved by the present invention are: firstly, most of the high Nb-TiAl alloy composition systems developed at present are suitable for deformation processes such as extrusion and forging, and cannot meet the requirements of complex components for casting and additive manufacturing of high Nb-TiAl alloys. performance and mechanical performance requirements; secondly, high Nb-TiAl alloy has poor plasticity and low thermal processing performance, and the material utilization rate is high and low cost,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 is a novel high-Nb-TiAl intermetallic compound material of Ti-47Al-8Nb-0.5W-3Mo-1.5Zr-0.5Y-0.2B-0.2Si (at.%).

[0019] The alloy is realized through the following steps: 1. Sponge titanium, high-purity aluminum, aluminum-chromium master alloy, aluminum-niobium master alloy, aluminum-tungsten-niobium master alloy, aluminum-zirconium master alloy, aluminum-yttrium master alloy, and pure silicon are weighed according to the ratio ; 2. Add the raw materials weighed in step 1 into the press equipment, and pressurize and form them. The weight of a single electrode is 180kg; 3. Put the electrode block obtained in step 2 into the vacuum consumable electrode melting furnace. Main smelting process parameters: vacuum degree is 1Pa, melting current is 35KA, melting voltage is 40V, then smelting at constant power for 200s, so that the melt is evenly mixed, poured into a water-cooled copper crucible, and cooled with the furnace to obtain an alloy casting Ingot; 5. Place the...

Embodiment 2

[0025] Example 2 is a novel high-Nb-TiAl intermetallic compound material of Ti-45Al-8Nb-0.5Ni-1.5V-2Zr-0.5Nd-0.2B-0.2Si (at.%).

[0026] The preparation of the Ti-45Al-8Nb-0.5Ni-1.5V-2Zr-0.5Nd-0.2B-0.15Si (at.%) intermetallic compound material of the present embodiment is realized through the following steps: 1. Sponge titanium, high-purity Aluminum, aluminum-niobium master alloy, aluminum-nickel master alloy, aluminum-vanadium master alloy, aluminum-zirconium master alloy, aluminum-neodymium master alloy, aluminum-titanium-boron master alloy, and pure silicon are weighed by weight; Put it into the press equipment and carry out press molding. The weight of a single electrode is 180kg; 3. Put the electrode block obtained in step 2 into the vacuum consumable electrode melting furnace. The main melting process parameters: the vacuum degree is 1Pa, The smelting current is 30KA, the smelting voltage is 40V, and then smelted at a constant power for 200s, and cooled with the furnace ...

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Abstract

The invention discloses a multi-component high-alloying high-Nb-TiAl intermetallic compound. The intermetallic compound comprises, by mole percentage, 40-50% of Al, 4-12% of Nb, 0-15% of (W, Ta, Mo and Co), 0-4.5% of (Ni, Fe, Hf and Zr), 0-4% of (V, Cr and Mn), 0-2% of B, 0-3% of (C and Si), 0-3% of rare earth element and the balance Ti and inevitable impurity. The number of alloy components is noless than 6 kinds. An obtained novel high-Nb-TiAl alloy material for casting and additional material manufacturing has excellent high-temperature strength, screep resisting performance and oxidationresisting performance, the casting and additional material manufacturing technology is good in performance, and the high-Nb-TiAl alloy can be adopted for producing precise castings and additional material manufactured components serving at 850 DEG C on a large scale, can also be used for preparing a heat deforming high-Nb-TiAl alloy component serving at a high temperature, and has popularization value.

Description

Technical field: [0001] The present invention relates to a multi-component high-alloyed high-Nb-TiAl intermetallic compound, in particular to a novel multi-component high-alloyed high-Nb-TiAl alloy material suitable for casting and additive manufacturing with a variety of trace elements It belongs to the technical field of superalloys. Background technique: [0002] TiAl intermetallic compound has low density, high specific strength and specific elastic modulus, and has good creep resistance and oxidation resistance. It is the most potential lightweight, high-strength and high-temperature structural material for the new generation of aviation and aerospace vehicles. At present, the service temperature of TiAl alloy is difficult to exceed 800°C, so it cannot be applied to components with higher working temperature and high temperature strength. Studies have shown that adding Nb alloy elements to TiAl alloys can further improve the high-temperature strength, creep resistance ...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03
CPCC22C1/03C22C14/00
Inventor 冯新纪志军丁贤飞罗倩南海
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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