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An NB‑Si‑ta‑W alloy material and its preparation method

An alloy material, nb-si-ta-w technology, applied in the field of Nb-Si-Ta-W alloy material and its preparation, can solve the problem of room temperature fracture toughness and high temperature strength not reaching a good balance, etc., to improve room temperature Compressive strength, strengthening of Nb-Si alloys, and effect of improving fracture toughness at room temperature

Inactive Publication Date: 2017-04-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor room temperature fracture toughness of Nb-Si alloy materials in the prior art limits their application, and the room temperature fracture toughness and high temperature strength have not reached a good balance, and it is necessary to further improve the room temperature fracture toughness and high temperature strength

Method used

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  • An NB‑Si‑ta‑W alloy material and its preparation method
  • An NB‑Si‑ta‑W alloy material and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0017] The Nb-Si-Ta-W alloy material in this embodiment is made of the following atomic percentages: Si 16%, Ta 11%, W 10%, and the balance is Nb and unavoidable impurities.

[0018] The method for preparing Nb-Si-Ta-W alloy material in this embodiment comprises the following steps:

[0019] Step 1: Mix silicon powder, tantalum powder, tungsten powder and niobium powder evenly and press them into electrodes, and then place the electrodes in a vacuum consumable arc melting furnace, in a vacuum degree of less than 1×10 -3 Arc smelting 4 times under the condition of Pa to obtain a semi-finished ingot; the smelting current of the arc smelting is 8kA, and the smelting voltage is 40V. Preferably, the mass purity of the silicon powder is not less than 99%, and the mass purity of the tantalum powder is The purity is not less than 99%, the mass purity of the tungsten powder is not less than 99%, and the mass purity of the niobium powder is not less than 99%;

[0020] Step 2, cutting t...

Embodiment 2

[0027] The Nb-Si-Ta-W alloy material in this embodiment is made of the following atomic percentages: Si 15%, Ta 10%, W 10%, and the balance is Nb and unavoidable impurities.

[0028] The method for preparing Nb-Si-Ta-W alloy material in this embodiment comprises the following steps:

[0029] Step 1: Mix silicon powder, tantalum powder, tungsten powder and niobium powder evenly and press them into electrodes, and then place the electrodes in a vacuum consumable arc melting furnace, in a vacuum degree of less than 1×10 -3 Arc smelting under the condition of Pa 3 times to obtain a semi-finished ingot; the smelting current of the arc smelting is 7kA, and the smelting voltage is 30V. Preferably, the mass purity of the silicon powder is not less than 99%, and the mass purity of the tantalum powder is The purity is not less than 99%, the mass purity of the tungsten powder is not less than 99%, and the mass purity of the niobium powder is not less than 99%;

[0030] Step 2, cutting t...

Embodiment 3

[0033] The Nb-Si-Ta-W alloy material in this embodiment is made of the following atomic percentages of raw materials: Si 20%, Ta 20%, W 15%, and the balance is Nb and unavoidable impurities.

[0034] The method for preparing Nb-Si-Ta-W alloy material in this embodiment comprises the following steps:

[0035] Step 1: Mix silicon powder, tantalum powder, tungsten powder and niobium powder evenly and press them into electrodes, and then place the electrodes in a vacuum consumable arc melting furnace, in a vacuum degree of less than 1×10 -3 Under the condition of Pa, arc melting is performed 4 times to obtain a semi-finished ingot; the melting current of the arc melting is 9kA, and the melting voltage is 50V. Preferably, the mass purity of the silicon powder is not less than 99%, and the mass purity of the tantalum powder is The purity is not less than 99%, the mass purity of the tungsten powder is not less than 99%, and the mass purity of the niobium powder is not less than 99%; ...

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Abstract

The invention discloses a Nb-Si-Ta-W alloy material. The Nb-Si-Ta-W alloy material is composed of, by atom percentage, 10% to 20% of Si, 5% to 20% of Ta, 5% to 15% of W and the balance Nb and inevitable impurities. The invention further discloses a manufacturing method of the Nb-Si-Ta-W alloy material. The method includes the steps that firstly, silicon powder, tantalum powder, tungsten powder and niobium powder are evenly mixed and then pressed into electrodes, the electrodes are then placed in a vacuum consumable arc smelting furnace to be smelted for 2 to 4 times, and semi-finished cast ingots are obtained; and secondly, the semi-finished cast ingots are cut into rods, the rods are ground and then smelted in an electron beam region, and the Nb-Si-Ta-W alloy material is obtained after the rods are cooled. The compression strength of the Nb-Si-Ta-W alloy material at the temperature of 150 DEG C ranges from 527 MPa to 773 MPa and the indoor temperature breaking tenacity, the indoor temperature compression strength and the high temperature compression strength of the Nb-Si-Ta-W 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-Ta-W alloy material and a preparation method thereof. Background technique [0002] With the development of aerospace technology, there is a need for a material that exceeds the temperature limit of the current superalloy. This new material must have high melting point, low density, 1300 ℃ ~ 1400 ℃ oxidation resistance and excellent high temperature strength. At present, people's research focuses on refractory intermetallic compound composite materials, especially Nb-Si alloy materials, which have the potential to serve above 1350 °C. Compared with superalloy materials, Nb-Si alloy materials have many excellent properties: low density, large elastic modulus, high temperature strength, etc. Therefore, many developed countries have developed new ultra-high temperature Nb-Si alloys with higher temperature bearing capacity. Research on alloy materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C1/02
CPCC22C1/02C22C27/02
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