Nickel-based powder superalloy and its preparation method and application

A technology of superalloy and nickel-based powder, applied in the field of powder superalloy, can solve the problem of inability to meet long-lasting high performance, achieve uniform microstructure, uniform alloy composition, and improve the degree of alloying

Active Publication Date: 2020-10-02
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing nickel-based powder superalloys used for turbine disks, such as FGH4095, FGH4096, FGH4097, FGH4098 and other alloys, have a maximum service temperature of 650°C to 750°C, and serious TCP phases will appear if the temperature exceeds 750°C. None of these alloys can meet the requirement of maintaining high performance at a high temperature of 815°C

Method used

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  • Nickel-based powder superalloy and its preparation method and application
  • Nickel-based powder superalloy and its preparation method and application
  • Nickel-based powder superalloy and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0061] The preparation of embodiment 1 nickel base powder superalloy

[0062] Prepare 1 with the ingredients listed in Table 1 and their contents as raw materials # ~5 # Nickel based powder superalloy.

[0063] Table 1 Composition and preparation conditions of nickel-based powder superalloy samples

[0064]

[0065]

[0066] The preparation method is as follows:

[0067] S1. Prepare raw materials according to the chemical composition and mass fraction of the powdered superalloy, and prepare alloy rods by using a 25kg vacuum induction melting process;

[0068] S2. Using the plasma rotating electrode method to prepare superalloy powder from the alloy bar, the alloy powder is screened and electrostatically treated to obtain a finished powder with a particle size of 50 μm to 150 μm;

[0069] S3. The alloy powder is put into a low-carbon steel ladle for vacuum degassing and sealing welding;

[0070] S4. Perform hot isostatic pressing to the alloy powder after sealing and...

experiment example 1

[0072] Experimental example 1 Metallographic structure characterization of nickel-based powder superalloy

[0073] Adopt Olympus GM-7 type metallographic microscope to observe the microstructure of alloy after heat treatment state and long-term aging, characterize the 1 prepared in embodiment 1 # ~5 # Metallographic structure of nickel-based powder superalloys.

[0074] to 4 # Nickel-based powder superalloy is typical, and its metallographic structure in the heat treatment state is as follows: figure 1 shown; 4 # The metallographic structures of nickel-based powder superalloy after aging at 815℃ / 3000h and after aging at 850℃ / 500h are as follows: figure 2 and image 3 shown.

[0075] The microstructure of the nickel-based powder superalloy provided by the present invention is mainly composed of γ, γ′, MC and M3B2 phases, and the composition of the γ′ phase is (Ni, Co) 3 (Al, Ti, Ta, Nb, Hf) type, the composition of MC type carbide is (Ti, Ta, Nb, Hf) C type.

[0076] 1...

experiment example 2

[0081] Performance Characterization of Experimental Example 2 Nickel-based Powder Superalloy

[0082] Adopt NCS GNT100 electronic tensile testing machine, GNCJ-30 mechanical type high temperature durable creep testing machine to test the 1 prepared in embodiment 1 # ~5 # Mechanical properties of nickel-based powder superalloys.

[0083] Among them, 1 # ~5 # The room temperature tensile properties, 760°C tensile properties, 815°C tensile properties, and 815°C / 450MPa durability properties of nickel-based powder superalloys are listed in Table 2, Table 3, Table 4, and Table 5, respectively.

[0084] Table 2 Room temperature tensile properties of nickel-based powder superalloys

[0085] Alloy No. σ b / MPa

σ 0.2 / MPa

δ / % ψ / % 1 #

1570 1210 11.0 12.5 2 #

1605 1240 10.0 11.5 3 #

1565 1205 11.5 12.5 4 #

1583 1225 11.0 12.0 5 #

1620 1260 9.0 10.5

[0086] Table 3 Tensile properties of nickel-based ...

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Abstract

The invention relates to nickel base powder high temperature alloy and a preparation method and application thereof. The nickel base powder high temperature alloy is prepared from, by mass, 0.02-0.10% of C, 14.0-22.0% of Co, 6.0-14.0% of Cr, 1.8-4.0% of Mo, 3.0-6.0% of W, 2.5-6.0% of Ta, 2.8-4.0% of Al, 2.6-4.4% of Ti, 1.2-3.2% of Nb, 0.1-0.5% of Hf, 0.01-0.08% of Zr, 0.01-0.08% of B, 0.3-6.0% of Os and / or 0.5-6.0% of Ru and the balance Ni. The nickel base powder high temperature alloy has the excellent high temperature tensile strength, yield strength and high-temperature lasting performance and higher working temperature.

Description

technical field [0001] The invention relates to the field of powder superalloys, in particular to a nickel-based powder superalloy and its preparation method and application. Background technique [0002] The turbine disk is one of the most important hot-end components in an aero-engine. During its service, the hub bears a huge centrifugal force and requires high tensile strength, while the temperature of the rim is higher than that of the hub, which requires a good high temperature. Durable performance and creep resistance. Aeroengine turbine disks have very stringent requirements on materials, not only requiring turbine disk alloys to have high tensile strength, high damage tolerance, high creep performance, high thermal fatigue performance, and excellent oxidation and corrosion resistance, but also requiring turbine The topological close-packed (TCP) phase precipitation tendency of the disc alloy is very small during the long-term service process, which makes the alloy h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C30/00C22C1/04C22F1/10C22F1/16
CPCC22C1/0433C22C19/056C22C19/057C22C30/00C22F1/10
Inventor 张义文贾建孙志坤
Owner BEIJING CISRI GAONA TECH
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