A kind of nickel-aluminum-chromium-tantalum ternary near-eutectic alloy and preparation method thereof

A near-eutectic, nickel-aluminum technology, which is applied in the field of nickel-aluminum-based eutectic alloy preparation, can solve the problems of not being able to improve toughness and strength at the same time, achieve good toughness and strength, and increase room temperature toughness

Active Publication Date: 2020-08-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a nickel-aluminum-chromium-tantalum ternary near-eutectic alloy, which solves the problem in the prior art that the introduction of a metal phase or a Laves phase into a NiAl alloy cannot simultaneously improve toughness and strength

Method used

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  • A kind of nickel-aluminum-chromium-tantalum ternary near-eutectic alloy and preparation method thereof
  • A kind of nickel-aluminum-chromium-tantalum ternary near-eutectic alloy and preparation method thereof
  • A kind of nickel-aluminum-chromium-tantalum ternary near-eutectic alloy and preparation method thereof

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Effect test

Embodiment 1

[0044] A nickel-aluminum-chromium-tantalum ternary near-eutectic alloy, which consists of NiAl-33Cr-4.5Ta, wherein Ni and Al are in an equal atomic ratio, specifically prepared by the following method,

[0045] Step 1, weighing raw materials according to the composition of the atomic percentage of the alloy;

[0046] Specifically, weigh Ni block, Al block, Cr sheet and Ta sheet according to the atomic percentage of NiAl-33Cr-4.5Ta; wherein the atomic ratios of Ni and Al are equal, wherein the purity of Ni block is 99.9wt%, and the purity of Al block is 99.9% wt%, the purity of Cr flakes is 99.7wt%, and the purity of Ta flakes is 99.9wt%.

[0047]Step 2, pre-treat the raw materials weighed in step 1. The specific method is to polish the Ta sheet and the Ni block, and pickle the Al block to remove the scale on the surface of the raw material, wherein the pickling solution is prepared according to the concentration of HCl and H 2 The O volume ratio is 1:1 for proportioning.

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Embodiment 2

[0056] A nickel-aluminum-chromium-tantalum ternary near-eutectic alloy, which consists of NiAl-33Cr-4.0Ta, wherein the atomic ratio of Ni and Al is equal; specifically, it is prepared by the following method,

[0057] Step 1, weighing raw materials according to the composition of the atomic percentage of the alloy;

[0058] Specifically, weigh Ni block, Al block, Cr sheet and Ta sheet according to the atomic percentage of NiAl-33Cr-4.0Ta; wherein the atomic ratios of Ni and Al are equal, wherein the purity of Ni block is 99.93wt%, and the purity of Al block is 99.96wt %, the purity of Cr flakes is 99.8wt%, and the purity of Ta flakes is 99.93wt%.

[0059] Step 2, pre-treat the raw materials weighed in step 1. The specific method is to polish the Ta sheet and the Ni block, and pickle the Al block to remove the scale on the surface of the raw material, wherein the pickling solution is prepared according to the concentration of HCl and H 2 The O volume ratio is 0.9:1 for propor...

Embodiment 3

[0067] A nickel-aluminum-chromium-tantalum ternary near-eutectic alloy, which consists of NiAl-33Cr-4.2Ta, wherein the atomic ratio of Ni and Al is equal; specifically, it is prepared by the following method,

[0068] Step 1, weighing raw materials according to the composition of the atomic percentage of the alloy;

[0069] Specifically, weigh Ni block, Al block, Cr sheet and Ta sheet according to the atomic percentage of NiAl-33Cr-4.2Ta; wherein the atomic ratio of Ni and Al is equal, wherein the purity of Ni block is 99.96wt%, and the purity of Al block is 99.99wt %, the purity of Cr flakes is 99.9wt%, and the purity of Ta flakes is 99.95wt%.

[0070] Step 2, pre-treat the raw materials weighed in step 1. The specific method is to polish the Ta sheet and the Ni block, and pickle the Al block to remove the scale on the surface of the raw material, wherein the pickling solution is prepared according to the concentration of HCl and H 2 The O volume ratio is 0.95:1 for proport...

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Abstract

The invention discloses a nickel aluminum-chrome-tantalum ternary near-eutectic alloy. The nickel aluminum-chrome-tantalum ternary near-eutectic alloy comprises NiAl-33Cr-xTa according to the atomic percent, wherein 4.0<=x<=4.5. The invention further discloses a preparation method of the nickel aluminum-chrome-tantalum ternary near-eutectic alloy. The preparation method is particularly implementedaccording to the following steps that 1, raw materials are weighed according to the atomic percent of components of the alloy; 2, the raw materials weighed in the step 1 are pretreated; 3, the compensation quantity of Al and Cr is calculated, and the corresponding raw materials are weighed; and 4, smelting is conducted, and the nickel aluminum-chrome-tantalum ternary near-eutectic alloy is prepared. According to the prepared nickel aluminum-chrome-tantalum ternary near-eutectic alloy, the mechanical property is obviously improved, and meanwhile the toughness and the strength are improved.

Description

technical field [0001] The invention belongs to the technical field of nickel-aluminum-based eutectic alloy preparation, and relates to a nickel-aluminum-chromium-tantalum ternary near-eutectic alloy, and also relates to a preparation method of the nickel-aluminum-chromium-tantalum ternary near-eutectic alloy. Background technique [0002] Due to the long-range order of the crystal structure and the coexistence of metal bonds and covalent bonds, NiAl alloys have a series of unique excellent properties such as high melting point, low density, high thermal conductivity and excellent oxidation resistance, and are expected to replace Ni-based superalloys as aerospace Engine turbine blade material. However, the room temperature toughness of NiAl alloy is poor (4-6MPa·m 1 / 2 ) and low high temperature strength limit its industrial application. In order to improve the properties of NiAl alloys, researchers at home and abroad have conducted a series of studies through alloying or a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C30/00
CPCC22C1/02C22C30/00
Inventor 王雷张国君高露晗张云鹏王涛姚成利
Owner XIAN UNIV OF TECH
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