A kind of nb‑si‑ti‑ta‑b alloy material and preparation method thereof

An alloy material, nb-si-ti-ta-b technology, applied in the field of alloy preparation, can solve the problems of low density, low elastic modulus, high temperature strength, etc., and achieve the effect of improving high temperature strength, improving room temperature tensile strength and high purity

Active Publication Date: 2017-10-24
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • 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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  • A kind of nb‑si‑ti‑ta‑b alloy material and preparation method thereof
  • A kind of nb‑si‑ti‑ta‑b alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
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 percentage raw materials: Si 10%, Ti 20%, Ta 10%, B 5%, and the balance is Nb and not Avoid 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 pu...

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 percentage raw materials: Si 6%, Ti 16%, Ta 5%, B 2%, and the balance is Nb and not Avoid 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 Arc smelting 3 times under the condition of Pa to obtain Nb-Si-Ti-Ta-B alloy ingot; the smelting current of the arc smelting is 5kA, 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 purity o...

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 percentage raw materials: Si 20%, Ti 30%, Ta 15%, B 8%, and the balance is Nb and not Avoid 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 t...

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Abstract

The invention discloses a Nb-Si-Ti-Ta-B alloy material, which is made of raw materials with the following atomic percentages: Si 6%-20%, Ti 16%-30%, Ta 5%-15%, B 2 %~8%, the balance is Nb and unavoidable impurities. In addition, the present invention also discloses a method for preparing the Nb-Si-Ti-Ta-B alloy material. The method is as follows: 1. After uniformly mixing silicon powder, titanium powder, tantalum powder, boron powder and niobium powder, pressing it into an electrode The alloy ingot is obtained after arc melting; 2. The alloy ingot is extruded to obtain the Nb-Si-Ti-Ta-B alloy material. The tensile strength of the Nb‑Si‑Ti‑Ta‑B alloy material of the present invention is 267MPa~425MPa under the condition of 1300°C, and the room temperature plastic toughness, room temperature mechanical properties and high temperature resistance of the Nb‑Si‑Ti‑Ta‑B alloy material The tensile strength is 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 Patents(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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