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Nickel-based alloy, preparation method and article thereof

A technology of nickel-based alloys and articles, which is applied in the direction of mechanical equipment, engine components, machines/engines, etc., and can solve the problems of low creep strength at high temperatures

Inactive Publication Date: 2019-04-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, although the existing nickel-based single crystal superalloys AM3, CMSX-2 and René N4 do not contain Re, their high-temperature creep strength is significantly lower than that of CMSX-4 and René N5 alloys containing 3wt% Re

Method used

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  • Nickel-based alloy, preparation method and article thereof
  • Nickel-based alloy, preparation method and article thereof
  • Nickel-based alloy, preparation method and article thereof

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preparation example Construction

[0079] This application also provides a method for preparing a nickel-based alloy, including the following steps:

[0080] A) Prepare nickel-based master alloy ingots according to the above-mentioned nickel-based alloy composition ratio;

[0081] B) Remelting the nickel-based master alloy ingot, and then preparing nickel-based alloy castings;

[0082] C) The nickel-based alloy casting is heat-treated to obtain a nickel-based alloy.

[0083] In the above-mentioned preparation method of the nickel-based alloy, the specific composition of the nickel-based master alloy ingot has been described in detail above, and will not be repeated here.

[0084] In the above process of preparing the nickel-based alloy, the method for preparing the nickel-based master alloy ingot is performed according to a method well-known to those skilled in the art. For example, in this application, the raw materials are smelted in a vacuum melting furnace according to the composition ratio. To obtain a nickel-based...

Embodiment

[0098] The nickel-based superalloy of the present application achieves a good balance in alloy density, alloy cost, structural stability, high-temperature strength, etc., and has excellent comprehensive properties. In order to further illustrate the effect of this application, this application lists 7 specific examples, and compares 6 of them with 5 existing alloys. The alloy compositions of the 7 examples and the 5 existing alloy compositions are shown in Table 1. In the examples, the method for preparing the nickel-based superalloy is specifically:

[0099] 1) Put the raw materials with the distribution ratio shown in Table 1 into the vacuum induction melting furnace to smelt the alloy and prepare the master alloy ingot;

[0100] 2) Remelting the master alloy ingot in vacuum equipment, and then prepare columnar crystal castings by directional solidification in a mold shell formed by refractory materials, or prepare single crystal castings by spiral crystal selection or seed cryst...

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Abstract

The invention provides a nickel-based alloy, a preparation method and an article thereof. The nickel-based alloy is composed of the following elements of, 5.25wt%-6.2wt% of aluminum; 5.0wt%-7.0wt% ofchromium; 5.0wt%-7.0wt% of cobalt; 0.5wt%-2.5wt% of molybdenum; 7.0wt%-9.0wt% of tungsten; 0.0 wt%-1.0 wt% of titanium; 7.0 wt%-9. 0wt% of tantalum; 0.0wt% -0.25 wt% of hafnium; 0.0wt%-0.05wt% of carbon; 0.0wt%-0.01 wt% of boron, and the balance nickel. By adding the elements and adjusting the content of the elements, the obtained nickel-based alloy is in the alloy density, the alloy cost, the structure stability, the high-temperature strength and the like are well balanced, and the comprehensive performance is excellent.

Description

Technical field [0001] The present invention relates to the technical field of nickel-based alloys, in particular to a nickel-based alloy, a preparation method thereof, and manufactured articles. Background technique [0002] Superalloys are a type of alloy developed for service in high-temperature environments (above 650°C); this type of alloy is usually based on Fe, Co or Ni elements, with a large amount of main alloy elements Cr, Al, Ti, Ta, Nb, Mo, W or Re, etc. and trace elements C, B, Zr or Hf, etc. Superalloys are mainly used in the hot end components of gas turbine engines (including aviation turbine engines and ground gas turbine engines), rocket thrusters and nuclear reactors. Compared with iron-based (iron-nickel-based) superalloys and cobalt-based superalloys, nickel-based superalloys themselves have better oxidation resistance, and have a face-centered cubic crystal structure that takes into account strength and toughness, and higher phase stability And so on, so i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22F1/10F01D5/28
CPCC22C19/057C22F1/10F01D5/28F01D5/286F05D2300/175F05D2300/701
Inventor 不公告发明人
Owner CENT SOUTH UNIV
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