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High-concentration Re/Ru nickel-based single crystal superalloy with high temperature bearing capacity and high creep resistance

A nickel-based single crystal, high-concentration technology, applied in the field of high-temperature alloys, can solve the problems of high-temperature strength and durability that cannot fully meet the needs of advanced aero-engines with high propulsion ratios, and achieve improved temperature resistance, increased initial melting temperature, and wide heat treatment window effect

Inactive Publication Date: 2021-03-19
GUIZHOU UNIV OF ENG SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the Re / Ru content of the fourth-generation nickel-based superalloy in China is about 6% and 3%, and its high-temperature strength and durability still cannot fully meet the needs of the development of advanced aero-engines with high propulsion ratio.

Method used

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  • High-concentration Re/Ru nickel-based single crystal superalloy with high temperature bearing capacity and high creep resistance
  • High-concentration Re/Ru nickel-based single crystal superalloy with high temperature bearing capacity and high creep resistance
  • High-concentration Re/Ru nickel-based single crystal superalloy with high temperature bearing capacity and high creep resistance

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Embodiment 1

[0043] Table 1 lists the chemical composition (mass percent) comparison of nickel-based superalloy DD04 of the present invention and reference alloys N4 and DD03

[0044] Table 1

[0045]

[0046] In Table 1, DD04 is the chemical composition of the alloy of the present invention, and N4 and DD03 are the chemical composition of the comparative alloy.

[0047] The above three fully heat-treated alloys were cut into sheet samples with a cross-section of 2.5mm × 4.5mm by wire cutting technology, and were placed in a testing machine for durability test. The calculation results are listed in Table 2.

[0048] Table 2

[0049]

[0050]

[0051] The fully heat-treated alloys of DD03 and DD04 were cut into sheet samples with a cross section of 2.5mm × 4.5mm by wire cutting technology, and were placed in a testing machine for long-term life testing under medium temperature and high stress conditions. The calculation results are listed in Table 3 .

[0052] table 3

[0053] ...

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Abstract

The invention relates to a high-concentration Re / Ru nickel-based single crystal superalloy with high temperature bearing capacity and high creep resistance, and belongs to a new material for special purposes. The nickel-based superalloy comprises the following components of, in percentage by mass, 5.4-6.2% of aluminum, 7.2-7.8% of tantalum, 2.6-3.5% of chromium, 1.7-2.5% of molybdenum, 4.2-4.8% ofcobalt, 4.2-5.0% of tungsten, 5.8-6.4% of rhenium, 4.7-5.4% ruthenium, 0.07-0.12% of hafnium and the balance nickel. The preparation method of the nickel-based superalloy comprises a heat treatment process. The single-crystal nickel-based alloy has high temperature bearing capacity, good high-temperature mechanical property and creep property, good creep strength and long service life under the ultrahigh-temperature condition, and is a nickel-based single-crystal superalloy suitable for producing blades of hot end parts of high-thrust-ratio aero-engines and gas turbines.

Description

technical field [0001] The invention relates to the technical field of superalloys, in particular to a nickel-based single crystal superalloy with high concentration Re / Ru, high temperature bearing capacity and high creep resistance. part. Background technique [0002] Since the single crystal nickel-based superalloy eliminates the grain boundaries in ordinary casting alloys, its deformation can only be achieved by the movement of dislocations, and there are no problems such as grain boundary weakening, longitudinal grain boundary cracks, etc., and atoms such as Al and Ta are added. , the atom can react with Ni, and the γ' phase coherent with the matrix is ​​uniformly precipitated from the matrix. The γ' / γ two-phase coherent interface can hinder the movement of dislocations and improve the high temperature mechanics and creep properties of the alloy. Nickel-based single crystal alloys generally contain a variety of alloying elements and have a relatively complex alloy syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C30B29/52C22F1/10C21D1/78C22C1/02C30B11/00C30B33/02
CPCC21D1/78C22C1/023C22C19/057C22F1/10C30B11/00C30B29/52C30B33/02
Inventor 田宁田素贵赵国旗闫化锦刘丽荣
Owner GUIZHOU UNIV OF ENG SCI
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