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Nb-Si-Ti-Ta-B alloy material and preparation method thereof

A nb-si-ti-ta-b, alloy material technology, applied in the field of alloy preparation, can solve the problems of low density, low elastic modulus, high temperature strength, etc., and achieve a good balance between high temperature strength, room temperature mechanical properties and high temperature tensile strength , The effect of improving the tensile strength at room temperature

Active Publication Date: 2015-12-30
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The future aviation power system requires its hot-end key components to be used for a long time under high temperature and complex load conditions above 1100°C, so traditional nickel-based and cobalt-based superalloys can no longer meet the needs of the next generation of high-performance advanced power systems
Nb-Si series alloy materials have many excellent properties compared with the key component materials of aerospace power systems at this stage: low density, high elastic modulus, high temperature strength, etc. Therefore, many developed countries have developed new types with higher temperature bearing capacity. Research on ultra-high temperature Nb-Si alloy materials, however, the poor room temperature ductility and toughness of Nb-Si alloy materials limits its application

Method used

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  • Nb-Si-Ti-Ta-B alloy material and preparation method thereof
  • Nb-Si-Ti-Ta-B alloy material and preparation method thereof

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Effect test

Embodiment 1

[0020] The Nb-Si-Ti-Ta-B alloy material of this embodiment is characterized in that it is made of the following atomic percentages of raw materials: Si10%, Ti20%, Ta10%, B5%, and the balance is Nb and unavoidable impurities.

[0021] The method for preparing the Nb-Si-Ti-Ta-B alloy material in this embodiment comprises the following steps:

[0022] Step 1. Mix silicon powder, titanium powder, tantalum powder, boron powder and niobium powder evenly and press them into electrodes, then place the electrodes in a vacuum consumable arc melting furnace, and place them in a vacuum degree of less than 1×10 -4 Arc smelting 5 times under the condition of Pa to obtain Nb-Si-Ti-Ta-B alloy ingot; the smelting current of the arc smelting is 6kA, and the smelting voltage is 30V. Preferably, the mass purity of the silicon powder is not less than 99.99%, the mass purity of the titanium powder is not less than 99.99%, the mass purity of the tantalum powder is not less than 99.9%, and the mass p...

Embodiment 2

[0030] The Nb-Si-Ti-Ta-B alloy material of this embodiment is characterized in that it is made of the following atomic percentages of raw materials: Si6%, Ti16%, Ta5%, B2%, and the balance is Nb and unavoidable impurities.

[0031] The method for preparing the Nb-Si-Ti-Ta-B alloy material in this embodiment comprises the following steps:

[0032] Step 1. Mix silicon powder, titanium powder, tantalum powder, boron powder and niobium powder evenly and press them into electrodes, then place the electrodes in a vacuum consumable arc melting furnace, and place them in a vacuum degree of less than 1×10 -4 Under the condition of Pa, arc smelting 3 times to obtain Nb-Si-Ti-Ta-B alloy ingot; the smelting current of the arc smelting is 5kA, and the smelting voltage is 20V. Preferably, the mass purity of the silicon powder is not less than 99.99%, the mass purity of the titanium powder is not less than 99.99%, the mass purity of the tantalum powder is not less than 99.9%, and the mass pu...

Embodiment 3

[0036] The Nb-Si-Ti-Ta-B alloy material of this embodiment is characterized in that it is made of the following atomic percentages of raw materials: Si20%, Ti30%, Ta15%, B8%, and the balance is Nb and unavoidable impurities.

[0037] The method for preparing the Nb-Si-Ti-Ta-B alloy material in this embodiment comprises the following steps:

[0038] Step 1. Mix silicon powder, titanium powder, tantalum powder, boron powder and niobium powder evenly and press them into electrodes, then place the electrodes in a vacuum consumable arc melting furnace, and place them in a vacuum degree of less than 1×10 -4 Under the condition of Pa, arc melting is performed 6 times to obtain Nb-Si-Ti-Ta-B alloy ingot; the melting current of the arc melting is 7kA, and the melting voltage is 40V. Preferably, the mass purity of the silicon powder is not less than 99.99%, the mass purity of the titanium powder is not less than 99.99%, the mass purity of the tantalum powder is not less than 99.9%, and ...

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Abstract

The invention discloses an Nb-Si-Ti-Ta-B alloy material which is prepared from the following raw materials according to the following atom percentage: 6-20% of Si, 16-30% of Ti, 5-15% of Ta, 2-8% of B and the rest of Nb and unavoidable impurities. In addition, the invention also discloses a method for preparing the Nb-Si-Ti-Ta-B alloy material. The method comprises the following steps: 1, silicon powder, titanium powder, tantalum powder, boron powder and niobium powder are uniformly mixed and the mixture is compacted to form an electrode, and electric arc melting is carried out to obtain an alloy ingot; and 2, the alloy ingot undergoes extrusion so as to obtain the Nb-Si-Ti-Ta-B alloy material. Tensile strength of the Nb-Si-Ti-Ta-B alloy material under the condition of 1300 DEG C is 267MPa-425MPa. Ductility and toughness at room temperature, room-temperature mechanical property and high temperature tensile strength of the Nb-Si-Ti-Ta-B alloy material are well balanced.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and in particular relates to a Nb-Si-Ti-Ta-B alloy material and a preparation method thereof. Background technique [0002] The development of high-performance aircraft depends on the matching of advanced power systems. The modern engine system not only has a large thrust, but also has an increasing thrust-to-weight ratio. With the improvement of engine thrust and efficiency, the inlet temperature of the engine needs to be continuously increased. Among the engine components, The working conditions of the key parts of the hot end are the most severe, and they must bear high stress in a high temperature and corrosive environment above 1000 ° C, and also require a long service life, which requires the materials of the key parts of the hot end to have high creep resistance and good Corrosion resistance, high high temperature durability, fracture toughness and fatigue properties, etc. The n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/02C22C30/00C22C1/02
Inventor 喻吉良张如郑欣李来平夏明星王峰裴雅
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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