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Nickel-aluminum-based high-temperature structural material

A structural material, nickel-aluminum-based technology, applied in the field of high-temperature metal materials, can solve the problems of large equipment, high melting point of high-temperature alloy materials, difficult control, etc., and achieve good control and stable alloying reaction

Inactive Publication Date: 2022-04-01
SUZHOU KAI YOU ELECTRONICS SCI & TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, because of the high melting point of superalloy materials, although electromagnetic stirring can be used, the equipment is huge and difficult to control
Generally, stirring paddles are used for homogenization, and the stirring paddles will bring in more or less impurities, such as iron, carbon, silicon, etc. These impurities are generally harmful except for design requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A nickel-aluminum-based high-temperature structural material, its composition is Ni, Al, and doped with Ti element, its composition is Ni:Al:Ti ratio of 1:1:4, the material is prepared by the following method,

[0022] (1) Weigh high-purity Al in proportion, put it into a vacuum melting furnace, and heat it at 660 degrees Celsius to melt;

[0023] (2) Process high-purity Ni into Ni plates and high-purity Ti into Ti plates. The two plates are installed under the stirring motor at the same time, as meltable stirring paddles, and are preset in the vacuum melting furnace;

[0024] (3) Heat up to 1455 degrees Celsius, start stirring, stir for 1 hour, and stir while melting the Ni plate;

[0025] (4) Heat up to 1660 degrees Celsius, stir for 1 hour, and stir while melting the Ti plate;

[0026] (5) Stop stirring, heat up to 2000 degrees Celsius, and keep warm for 48 hours;

[0027] (6) Cooling with the furnace.

[0028] After testing, the alloy material has good uniformity...

Embodiment 2

[0030] A nickel-aluminum-based high-temperature structural material, its composition is Ni, Al, and doped with Ti element, its composition is Ni:Al:Ti ratio of 1:1:4, it is characterized in that, this material uses the following method preparation,

[0031] (1) Weigh high-purity Al in proportion, put it into a vacuum melting furnace, and heat it at 700 degrees Celsius to melt;

[0032] (2) Process high-purity Ni into Ni plates and high-purity Ti into Ti plates. The two plates are installed under the stirring motor at the same time, as meltable stirring paddles, and are preset in the vacuum melting furnace;

[0033] (3) Heat up to 1500 degrees Celsius, start stirring, stir for 2 hours, and stir while melting the Ni plate;

[0034] (4) heat up to 1660-1700 degrees Celsius, stir for 2 hours, and stir while melting the Ti plate;

[0035] (5) Stop stirring, heat up to 3000 degrees Celsius, and keep warm for 48 hours;

[0036] (6) Cooling with the furnace.

[0037] The high-puri...

Embodiment 3

[0041] A nickel-aluminum-based high-temperature structural material, its composition is Ni, Al, and doped with Ti element, its composition is Ni:Al:Ti ratio of 1:1:4, it is characterized in that, this material uses the following method preparation,

[0042] (1) Weigh high-purity Al in proportion, put it into a vacuum melting furnace, and heat it at 680 degrees Celsius to melt;

[0043] (2) Process high-purity Ni into Ni plates and high-purity Ti into Ti plates. The two plates are installed under the stirring motor at the same time, as meltable stirring paddles, and are preset in the vacuum melting furnace;

[0044] (3) Heat up to 1600 degrees Celsius, start stirring, stir for 1.5 hours, and stir while melting the Ni plate;

[0045] (4) Heat up to 1680 degrees Celsius and stir for 1.5 hours, stirring while melting the Ti plate;

[0046] (5) Stop stirring, heat up to 2500 degrees Celsius, and keep warm for 48 hours;

[0047] (6) Cooling with the furnace.

[0048] After testi...

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Abstract

The invention relates to a nickel-aluminum-based high-temperature structural material which comprises Ni and Al and is doped with Ti element, the atomic percent of Ni to Al to Ti is 1: 1: 4, and the nickel-aluminum-based high-temperature structural material is characterized in that the material is prepared by the following steps: processing high-purity Ni into a Ni plate, processing high-purity Ti into a Ti plate, mounting the two plates under a stirring motor at the same time to serve as a meltable stirring paddle, and prearranging the two plates in a vacuum melting furnace; the temperature is raised to 1455-1500 DEG C, stirring is started, stirring is conducted for 1-2 hours, and stirring is conducted while the Ni plate is melted; the temperature is increased to 1660-1700 DEG C, stirring is conducted for 1-2 hours, and stirring is conducted while the Ti plate is melted; stopping stirring, raising the temperature to 2000-3000 DEG C, and keeping the temperature for 48 hours; according to the technical scheme, the ablatable stirring paddle made of two kinds of high-purity metal is ingeniously used, the possibility that impurities are introduced into a common stirring paddle is avoided, and meanwhile expensive equipment such as electromagnetic stirring does not need to be used. And two-stage stirring and heating are performed, nickel and titanium are respectively in respective temperature stirring intervals, and the alloying reaction is stable and sufficient.

Description

technical field [0001] The invention relates to a high-temperature metal material, in particular to a nickel-aluminum-based high-temperature structural material. Background technique [0002] Nickel-aluminum alloy material is an excellent high-temperature structural material, which has the advantages of high melting point, high thermal conductivity, low density and excellent oxidation resistance. The problems of poor plasticity at room temperature, low fracture strength and insufficient high-temperature strength are technical difficulties that need to be overcome when the material is used as a structural material. Numerous technicians have carried out continuous research on this problem. Mainly starting from internal doping and external temperature strengthening, a large number of available ideas are provided. [0003] For nickel-aluminum alloy materials, we found that the problem of its easy fracture is partly due to the reason of purity, that is, nickel, aluminum itself ...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02
Inventor 冉英欧阳春
Owner SUZHOU KAI YOU ELECTRONICS SCI & TECH LTD