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Nickel base powder high-temperature alloy with high tensile strength and preparation method thereof

A high-tensile strength, high-temperature alloy technology, applied in the field of powder superalloys, can solve the problem that FGH4097 alloy cannot meet the tensile strength of hot-end rotating parts such as aero-engine turbine disks, etc., to increase the grain boundary strengthening effect and simplify the heat treatment system , the effect of saving energy

Active Publication Date: 2019-09-06
BEIJING CISRI GAONA TECH
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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a nickel-based powder superalloy with high tensile strength, to solve the technical problem that the existing FGH4097 alloy cannot meet the tensile strength of hot-end rotating parts such as aeroengine turbine disks

Method used

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  • Nickel base powder high-temperature alloy with high tensile strength and preparation method thereof
  • Nickel base powder high-temperature alloy with high tensile strength and preparation method thereof
  • Nickel base powder high-temperature alloy with high tensile strength and preparation method thereof

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Embodiment 1

[0029] The object of the present invention is to provide a nickel-based powder superalloy with high tensile strength, the chemical composition and mass percentage (wt%) of the alloy are: C 0.04-0.08, Co 17.0-19.0, Cr 11.0- 13.0, W 6.0-6.7, Mo4.3-5.0, Al 4.9-5.4, Ti 1.5-1.9, Nb 2.5-2.9, Hf 0.2-0.5, B<0.03, Zr<0.03, Mg<0.005, Ce<0.002, Yu The amount is Ni and other unavoidable impurities.

[0030] The main technical scheme of the present invention is to realize nickel-based powder superalloy by adding γ′ phase forming elements Al, Ti, Nb, solid solution strengthening elements Cr, Co, W, Mo and grain boundary strengthening elements C, B, Zr, Hf High tensile strength, while controlling the content of Cr, W, Mo to reduce the precipitation tendency of topological close-packed TCP phase, so as to obtain a composition range with good comprehensive properties. Specifically, Al, Ti, and Nb added to the alloy components can increase the content of the γ′ phase and the degree of alloying...

Embodiment 2

[0038] The present invention also provides a method for preparing a nickel-based powder superalloy with high tensile strength, such as figure 1 As shown, the preparation method specifically includes the following steps:

[0039] Step S1. Prepare raw materials according to the chemical composition and mass fraction of the nickel-based powder superalloy, and prepare master alloy rods by vacuum induction melting process;

[0040] Step S2. Making the master alloy bar into alloy powder; specifically, using the plasma rotating electrode method to make the master alloy bar into alloy powder, and the particle size of the alloy powder is 50 μm to 150 μm;

[0041] Step S3. The alloy powder is loaded into a low-carbon steel ladle, and vacuum degassed and sealed to obtain the alloy powder after sealing;

[0042] Step S4. Perform hot isostatic pressing on the nickel-based alloy powder after sealing and welding to obtain a cylindrical ingot;

[0043] Step S5. Perform heat treatment on the...

Embodiment 3

[0058] This embodiment provides five different nickel-based powder superalloys, which are:

[0059] (1) The chemical composition and mass percentage (wt%) of nickel-based powder superalloy A-1 alloy are: C 0.04, Co17.0, Cr 11.0, W 6.0, Mo 4.3, Al 5.1, Ti 1.7, Nb 2.7, Hf 0.32, Zr 0.014, B 0.015, Mg0.003, Ce 0.0012, the balance is Ni and other unavoidable impurities.

[0060] (2) The chemical composition and mass percentage (wt%) of nickel-based powder superalloy A-2 alloy are: C 0.04, Co17.0, Cr 13.0, W 6.0, Mo 4.3, Al 5.1, Ti 1.7, Nb 2.7, Hf 0.32, Zr 0.014, B 0.015, Mg0.003, Ce 0.0014, the balance is Ni and other unavoidable impurities.

[0061] (3) The chemical composition and mass percentage (wt%) of nickel-based powder superalloy A-3 alloy are: C 0.04, Co19.0, Cr 13.0, W 6.0, Mo 4.3, Al 5.1, Ti 1.7, Nb 2.7, Hf 0.32, Zr 0.014, B 0.015, Mg0.002, Ce 0.0015, the balance is Ni and other unavoidable impurities.

[0062] (4) The chemical composition and mass percentage (wt%) of...

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Abstract

The invention relates to a nickel base powder high-temperature alloy with high tensile strength and a preparation method thereof, belongs to the technical field of high-temperature alloys, and solvesthe technical problems of strict requirements on high-temperature alloy materials by such hot end parts as turbine discs in traditional engines and incapability of meeting the performance requirementsby traditional high-temperature alloy materials. The powder high-temperature alloy comprises the following chemical components in percentage by mass: 0.04-0.08 of C, 17.0-19.0 of Co, 11.0-13.0 of Cr,6.0-6.7 of W, 4.3-5.0 of Mo, 4.9-5.4 of Al, 1.5-1.9 of Ti, 2.5-2.9 of Nb, 0.2-0.5 of Hf, B less than 0.03, Zr less than 0.03, Mg less than 0.005, Ce less than 0.002, and the balance of Ni and other inevitable impurities. The powder high-temperature alloy achieves high tensile strength and excellent high-temperature creep resistance and high-temperature endurance, and is mainly used for preparingsuch hot end parts as aeroengine turbine discs.

Description

technical field [0001] The invention relates to the technical field of powder superalloys, in particular to a nickel-based powder superalloy with high tensile strength and a preparation method thereof. Background technique [0002] Powdered superalloys are key materials for hot-end rotating parts such as aeroengine turbine disks. Compared with traditional cast superalloys, powder superalloys are formed by cooling micron-sized pre-alloyed powders at high cooling rates, making the alloy composition uniform, the microstructure uniform, and the precipitates distributed in a dispersed manner, which eliminates macro segregation and improves The hot workability of the alloy is improved, and the tensile strength of the alloy is improved. In the actual operation of the engine, the hub of the turbine disc bears a huge centrifugal force, which requires high tensile strength, and the temperature of the rim is higher than that of the hub, which requires better durability and creep resis...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C1/04C22F1/10
CPCC22C1/0433C22C19/056C22F1/10
Inventor 张义文贾建谭黎明刘建涛韩寿波刘明东张国星孙志坤陶宇张莹
Owner BEIJING CISRI GAONA TECH
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