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A titanium-based multi-principal element alloy

A multi-principal alloy and alloy technology, applied in the field of metal materials, can solve the problems of low-density mechanical properties, high-temperature structural materials, no oxidation resistance, and difficult high-temperature environment applications, etc., to achieve good high-temperature oxidation resistance, low cost, Ease of promoting the effect of the application

Active Publication Date: 2022-04-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multi-principal alloys that can be used in high-temperature structures in existing reports are mainly multi-principal refractory alloy systems. One type has good high-temperature softening resistance but high alloy density, such as NbMoTaW and VNbMoTaW alloys, which can be used at 1000 ° C The compressive yield strengths were 548MPa and 842MPa respectively, but the densities were 13.75g / cm 3 and 12.36g / cm 3 ; The other type is a low-density multi-principal alloy, for example, NbTiVZr alloy, which has a density of 6.5g / cm 3 , the compressive yield strength at 600°C is 834MPa, but it does not have oxidation resistance at 600°C, so it is difficult to apply in high temperature environment
[0006] Based on the analysis of existing high-temperature titanium alloys and titanium-based intermetallic compounds and the public reports of a large number of other system alloys, it is found that in the range of 650 ° C to 850 ° C, there is a lack of a low density and excellent oxidation resistance in this temperature range. High-temperature structural materials with excellent performance and mechanical properties

Method used

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  • A titanium-based multi-principal element alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Titanium-based multi-principal alloy contains: 55%Ti, 25%Al, 10%Cr, 10%Nb according to the atomic percentage. The raw materials are zero-grade sponge titanium, 99.9% pure chromium, A00 grade high-purity aluminum, Ti-Nb60 master alloy, etc.

[0036] The titanium-based multi-principal alloy material of this embodiment is prepared through the following steps:

[0037] Step (1): Configure the raw materials according to the obtained ingot weight of 50kg, and accurately weigh each raw material;

[0038] Step (2): Press the electrode, mix the titanium sponge, 99.9% pure chromium, and Ti-Nb60 alloy evenly, put the aluminum beans in layers evenly, and press the electrode after the raw materials are completely placed in the electrode mold;

[0039] Step (3): Electrode group welding is carried out by means of welding in the furnace, and four electrodes form a group;

[0040] Step (4): Melting vacuum degree < 0.5Pa, the melting current is controlled within the range of 3kA-6kA acco...

Embodiment 2

[0047] Titanium-based multi-principal alloy contains: 60% Ti, 15% Al, 10% Cr, and 15% Nb in atomic percentage. The raw materials are zero-grade sponge titanium, 99.9% pure chromium, A00 grade high-purity aluminum, Ti-Nb60 master alloy, etc.

[0048] The titanium-based multi-principal alloy material of this embodiment is prepared through the following steps:

[0049] Step (1): Configure the raw materials according to the obtained ingot weight of 50kg, and accurately weigh each raw material;

[0050] Step (2): Press the electrode, mix the titanium sponge, 99.9% pure chromium, and Ti-Nb60 alloy evenly, put the aluminum beans in layers evenly, and press the electrode after the raw materials are completely placed in the electrode mold;

[0051] Step (3): Electrode group welding is carried out by means of welding in the furnace, and four electrodes form a group;

[0052] Step (4): Melting vacuum degree < 0.5Pa, the melting current is controlled within the range of 3kA-6kA accordin...

Embodiment 3

[0060] Titanium-based multi-principal alloy contains: 63.7%Ti, 13%Al, 10%Cr, 10%Nb, 2%Zr, 0.3Ta, 0.2W, 0.8Si, and the raw material is zero-grade sponge titanium. , 99.9% pure chromium, A00 grade high-purity aluminum, Ti-Nb60 master alloy, zirconium sponge, Al-Ta master alloy, fine tungsten powder, Al-Si master alloy, etc.

[0061] The titanium-based multi-principal alloy material of this embodiment is prepared through the following steps:

[0062] Step (1): configure the raw materials according to the obtained weight of 100kg ingot, and accurately weigh each raw material;

[0063] Step (2): Press the electrode, mix the titanium sponge, 99.9% pure chromium, and Ti-Nb60 alloy evenly, put the rest of the raw materials into the alloy bag, put the aluminum beans evenly, put the raw materials into the electrode mold completely, and press the electrode;

[0064] Step (3): Electrode group welding is carried out by means of welding in the furnace, and four electrodes form a group;

...

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Abstract

The invention belongs to the technical field of metal materials and relates to a titanium-based multi-principal element alloy. Titanium, aluminum, chromium, and niobium are used as the main alloying elements, which contain: 70% to 50% Ti, 13% to 28% Al, 8% to 11% Cr, and 10% to 15% Nb, 0-2% Zr, 0-0.5% Ta, 0-0.5% W, 0-2.0% Si, and the balance is unavoidable impurities. The alloy density is 4.6g / cm 3 ~5.2g / cm 3 Within the range, the density is more than 35% lower than that of traditional nickel-based superalloys, and a significant structural weight reduction effect can be achieved by replacing traditional nickel-based alloys. It has excellent oxidation resistance at 650°C to 850°C, and has good mechanical properties at the same time, and has good application potential in high-temperature structural parts of aero-engines.

Description

technical field [0001] The invention belongs to the technical field of metal materials and relates to a titanium-based multi-principal element alloy. Background technique [0002] In the field of aero-engine materials, different structural materials are selected according to the service temperature differences of fans, compressors, turbines and other components. Usually in the middle and low temperature section (room temperature ~ 600 ℃), the fans and compressor parts are mainly made of titanium alloy materials, and the density of titanium alloy is 4.4g / cm 3 ~4.6g / cm 3 , the main component types include disks, blades, and casings; while the turbine position in the high-temperature section (650 ° C ~ 1200 ° C) mainly uses nickel-based superalloy materials, and the density of nickel-based alloys is 8.2g / cm 3 above. [0003] The maximum service temperature of traditional single-principal titanium alloys is below 650 °C, which is mainly limited by its high-temperature oxidati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/03
CPCC22C14/00C22C1/03
Inventor 刘宏武高帆冯像征李臻熙
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS