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Ni-Cr-Mo-W-Nb-Al-Ti system high temperature alloy material, and preparation method and application thereof

A technology of superalloys and alloy materials, which is applied in the field of Ni-Cr-Mo-W-Nb-Al-Ti series superalloy materials, can solve the problems of limited application, limited lasting life, lack of oxidation resistance, etc., and achieve excellent The effect of long-lasting life, excellent oxidation resistance, excellent mechanical properties

Active Publication Date: 2017-03-15
SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the newly developed high-temperature-resistant engine alloy materials, some of them have a tensile strength of 800MPa at 1000°C. However, their long-lasting life is limited and they do not have good oxidation resistance, which greatly limits their practical applications.

Method used

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  • Ni-Cr-Mo-W-Nb-Al-Ti system high temperature alloy material, and preparation method and application thereof
  • Ni-Cr-Mo-W-Nb-Al-Ti system high temperature alloy material, and preparation method and application thereof
  • Ni-Cr-Mo-W-Nb-Al-Ti system high temperature alloy material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition of the alloy is:

[0026] C 0.08; Cr 14.0; Mo 2.75; W 2.75; Nb+Ta 2.75; Al 0.3; Ti 0.4; Fe 5.0; The balance is Ni and unavoidable impurity elements.

[0027] (1) Dosing according to the above-mentioned alloy composition, and then melt in a vacuum induction furnace at a melting temperature of 1450-1470°C, and pour the solution into a consumable electrode;

[0028] (2) remelting and refining the consumable electrode obtained in step (1) in a vacuum consumable furnace, and remelting it into an electroslag ingot;

[0029] (3) heating the electroslag ingot obtained in step (2) to 1240-1260°C, keeping it warm for 3-5 hours, starting forging temperature ≥ 1200°C, stopping forging temperature ≥ 1010°C;

[0030] (4) Air-cool to room temperature after forging, and then carry out surface treatment;

[0031] (5) Heat treatment: solid solution at 980-1150°C, air cooling to obtain the required alloy material.

Embodiment 2

[0033] The composition of the alloy is:

[0034] C 0.07; Cr 16.0; Mo 3.25; W 3.25; Nb+Ta 3.25; Al 0.6; Ti 0.7; Fe 9.0; It is Ni and inevitable impurity elements.

[0035] (1) Dosing according to the above-mentioned alloy composition, and then melt in a vacuum induction furnace at a melting temperature of 1450-1470°C, and pour the solution into a consumable electrode;

[0036] (2) remelting and refining the consumable electrode obtained in step (1) in a vacuum consumable furnace, and remelting it into an electroslag ingot;

[0037] (3) heating the electroslag ingot obtained in step (2) to 1240-1260°C, keeping it warm for 3-5 hours, starting forging temperature ≥ 1200°C, stopping forging temperature ≥ 1010°C;

[0038] (4) Air-cool to room temperature after forging, and then carry out surface treatment;

[0039] (5) Heat treatment: solid solution at 980-1150°C, air cooling to obtain the required alloy material.

Embodiment 3

[0041] The composition of the alloy is:

[0042] C 0.08; Cr 14.5; Mo 3.00; W 3.00; Nb+Ta 3.00; Al 0.4; Ti 0.5; Fe 7.0; Zr0.01; B 0.004; Mg 0.02; Mn 0.55; It is Ni and inevitable impurity elements.

[0043] (1) Dosing according to the above-mentioned alloy composition, and then melt in a vacuum induction furnace at a melting temperature of 1450-1470°C, and pour the solution into a consumable electrode;

[0044] (2) remelting and refining the consumable electrode obtained in step (1) in a vacuum consumable furnace, and remelting it into an electroslag ingot;

[0045] (3) heating the electroslag ingot obtained in step (2) to 1240-1260°C, keeping it warm for 3-5 hours, starting forging temperature ≥ 1200°C, stopping forging temperature ≥ 1010°C;

[0046] (4) Air-cool to room temperature after forging, and then carry out surface treatment;

[0047] (5) Heat treatment: solid solution at 980-1150°C, air cooling to obtain the required alloy material.

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Abstract

The invention provides a Ni-Cr-Mo-W-Nb-Al-Ti system high temperature alloy material. The high temperature alloy material comprises the following chemical ingredients by weight: less than or equal to 0.08% of C, 14.0-16.0% of Cr, 2.75-3.25% of Mo, 2.75-3.25% of W, 2.75-3.25% of Nb and Ta, 0.3-0.6% of Al, 0.4-0.7% of Ti, 5.0-9.0% of Fe, 0.01-0.05% of Zr, 0.003-0.008% of B, 0.01-0.05% of Mg, less than or equal to 0.75% of Mn, less than or equal to 0.01% of P, less than or equal to 0.04% of Si, less than or equal to 0.01% of S, and the balance of Ni and inevitable impurity elements. The invention further provides a preparation method of the material and application to a power device. The obtained alloy has the advantages of high high-temperature tensile strength, high oxidation resistance and long service life.

Description

technical field [0001] The invention relates to alloy materials, in particular to a Ni-Cr-Mo-W-Nb-Al-Ti superalloy material, a preparation method and application thereof. Background technique [0002] In the field of aviation technology, among the hot parts of aero-engines, the use conditions of blade materials are the most severe. [0003] Turbine blades are the key components of gas turbines. In order to improve the efficiency of the engine, the gas inlet temperature of the turbine must be continuously increased. Generally, the temperature of the blade body is above 650°C, even as high as 980°C, and the temperature of the blade root is also as high as 700°C or above. Moreover, the turbine blades bear the action of aerodynamic force and centrifugal force, resulting in tensile stress and bending stress. At the same time, the high-speed pulse of the gas flow causes the blades to generate vibration stress. The average tensile stress on the blade body part is 140Mpa, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02C22B9/18C22F1/10
CPCC22B9/18C22C1/023C22C19/056C22F1/10
Inventor 李建雷德江刘永新黄志永张华国丁勇高刚毅魏泽辉廖云虎朱小阳熊安文刘继江
Owner SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
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