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A kind of preparation method of oxide dispersion strengthened nickel base alloy

A nickel-based alloy and dispersion-strengthening technology, which is applied in the field of oxide dispersion-strengthening nickel-based alloy preparation, can solve the problems of complex process, difficult oxides, expensive equipment, etc., and achieve the effect of simple process and good technical effect.

Inactive Publication Date: 2011-12-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this type of alloy has very good development prospects, but there are also certain shortcomings, such as complex process, high production cost, expensive equipment, single product, etc.
[0004] Relatively speaking, casting superalloys has the characteristics of simple process, low cost, relatively simple equipment, and the ability to produce superalloy castings of various complex shapes. There are still many difficulties in producing oxide dispersion-strengthened nickel-based alloys by casting. Difficult to add evenly into the alloy

Method used

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  • A kind of preparation method of oxide dispersion strengthened nickel base alloy
  • A kind of preparation method of oxide dispersion strengthened nickel base alloy
  • A kind of preparation method of oxide dispersion strengthened nickel base alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1 A preparation method of oxide dispersion strengthened nickel-based alloy

[0027] First adopt mechanical ball milling mode to carry out uniform mixing to micron level nickel powder (mass ratio 9.5%), diyttrium trioxide powder (mass ratio 5%), tungsten powder (mass ratio 85.5%); Mixing medium adopts acetone, ball milling time is 20 Hours; then molded by compression molding, the green body is sintered after molding; the sintering furnace adopts a continuous atmosphere protection tube furnace, the atmosphere uses high-purity hydrogen, and the flow rate is controlled at 30-40ml / min.cm 2 ; The isothermal sintering temperature is 1500°C, and the holding time is 0.5 hours; after the isothermal sintering is completed, cool to room temperature with the furnace and take it out. The obtained master alloy microstructure is shown in figure 1 .

[0028] Melt the master alloy (accounting for 5% of the total alloy mass) and the K418 master alloy in a vacuum induction furnac...

Embodiment 2

[0029] Example 2 A preparation method of oxide dispersion strengthened nickel-based alloy

[0030] First adopt mechanical ball milling mode to carry out uniform mixing to nano-micron level nickel powder (mass ratio 10%), diyttrium trioxide powder (mass ratio 10%), tungsten powder (mass ratio 80%); Mixing medium adopts acetone, ball milling time is 15 hours; then molded by compression molding, and the green body is sintered after molding; the sintering furnace adopts a continuous atmosphere protection tube furnace, the atmosphere uses high-purity hydrogen, and the flow rate is controlled at 30-40ml / min.cm 2 ; The isothermal sintering temperature is 1400°C, and the holding time is 2 hours; after the isothermal sintering is completed, cool to room temperature with the furnace and take it out.

[0031] Melt the master alloy (accounting for 10% of the total mass of the alloy) and the K417 master alloy in a vacuum induction furnace. After the alloy is completely melted, increase the...

Embodiment 3

[0032] Example 3 A preparation method of oxide dispersion strengthened nickel-based alloy

[0033] Firstly, the micron-level nickel powder (95% by mass) and yttrium trioxide powder (5% by mass) are uniformly mixed by mechanical ball milling; the mixing medium is n-ethane, and the ball milling time is 30 hours; Carry out molding, and sinter the biscuit after molding; the sintering furnace adopts a continuous atmosphere protection tube furnace, and uses a mixed gas of high-purity hydrogen and high-purity nitrogen. The ratio of hydrogen to nitrogen is between 1:1, and the reducing gas The flow can be controlled at 20-30ml / min.cm 2 ; The isothermal sintering temperature is 1400°C, and the holding time is 2 hours;

[0034] Melt the master alloy (accounting for 8% of the total alloy mass) and the K452 master alloy in a vacuum induction furnace. After the alloy is completely melted, increase the power to electromagnetically stir the alloy liquid for 3-5 minutes, and then reduce the ...

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Abstract

A method for preparing an oxide dispersion-strengthened nickel-based alloy, characterized in that: the specific process of the preparation method for the oxide-based dispersion-strengthened nickel-based alloy is as follows: the first step: first prepare a part of the nickel-based alloy component metal and Composite powder composed of metal oxides, and then the composite powder is molded, the green body is sintered in a reducing atmosphere, and then cooled to room temperature and taken out to obtain a metal oxide master alloy; the second step: according to the composition ratio, the metal The oxide master alloy and the master alloy can be smelted and poured in a furnace. Compared with the prior art, the oxide dispersion-strengthened nickel-based alloy prepared by the present invention can be used as an irreplaceable high-temperature component of aero-engine and gas turbine (for example: turbine blades, guide vanes, turbine discs and combustion chambers) key structural materials. At the same time, the process of the invention is relatively simple, and the technical effect is obviously better than that of the prior art.

Description

Technical field: [0001] The invention relates to the preparation technology of superalloy materials, and in particular provides a preparation method of oxide dispersion strengthened nickel-based alloy. Background technique: [0002] In the existing technology, high-temperature alloys are irreplaceable key structural materials for high-temperature components of military and civil aero-engines and gas turbines, especially turbine blades, guide vanes, turbine disks, and combustion chambers. They are the foundation of a national aerospace field. , the proportion of superalloys in advanced aeroengines is as high as 60%, and the level of superalloys reflects a country's national defense strength and industrial level to a certain extent. [0003] The traditional strengthening mechanisms of superalloys mainly include solid solution strengthening, precipitation strengthening, grain boundary strengthening and production process strengthening. In the strengthening process, oxide dispe...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/03
Inventor 姜卫国楼琅洪胡壮麒
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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