Preparation method of superalloy

A technology of superalloy and deformed superalloy, which is applied in the field of superalloy preparation, can solve the problems of small hot working process window, difficult deformation, poor formability, etc., and achieves the effect of short ball milling time, few process steps, and improved performance.

Active Publication Date: 2022-02-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of dispersed reinforcement phases to superalloys is also accompanied by the following problems: (1) superalloys are hard-to-deform materials with poor formability and a small thermal processing window

Method used

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  • Preparation method of superalloy
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  • Preparation method of superalloy

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preparation example Construction

[0043] The preparation method of superalloy in the present embodiment is:

[0044] Preparation of high-purity master alloys by double or triple smelting of vacuum induction melting and / or electroslag remelting and / or vacuum induction consumable melting;

[0045] Then use argon atomization to prepare spherical superalloy particles;

[0046] Put the superalloy particles, oxide powder, grinding balls and ball milling tank into the hand box to evacuate, turn off the vacuum pump, fill with argon, when the pressure inside and outside the hand box is consistent, put the superalloy particles, oxide powder and grinding Put the ball into the jar, tighten the ball mill jar, then take out the ball mill jar from the hand box, and install it on the ball mill;

[0047] Start the ball mill for mixing ball milling, the ball-to-material ratio is 2:1-10:1, the ball milling speed is 300-600rad / min, and the ball milling time is 10-30h. The setting of the ball milling speed and time depends on the...

Embodiment 1

[0052]In the preparation method of the superalloy in this embodiment, the composition of the deformed superalloy particles is: Co 20%, Cr 15%, Ti 5.5%, Al 2%, W 2%, Mo 2%, Nb 1%, Ni Bal. These raw materials are smelted in a vacuum induction melting furnace according to the ratio, then refined in an electroslag furnace, and finally further refined in a vacuum induction consumable furnace. Before each step of refining, the ingot is peeled and the head and tail are cut. The prepared ingot is atomized by argon gas to prepare spherical superalloy particles.

[0053] Including the following steps,

[0054] Step 1, ball milling: use a ball mill to grind superalloy particles with an average diameter of 100 μm (such as figure 1 ) and Y with an average size of 100nm 2 o 3 The powder is evenly mixed, Y 2 o 3 The mass fraction of the powder is 0.5%, the ball-to-material ratio is 2:1, the ball milling speed is 300rad / min, the ball milling time is 30h, and the Y 2 o 3 Embedded on the...

Embodiment 2

[0060] In the preparation method of the superalloy in this embodiment, the composition of the deformed superalloy particles is: Co 20%, Cr 15%, Ti 5.5%, Al 2%, W 2%, Mo 2%, Nb 1%, Ni Bal. These raw materials are smelted in a vacuum induction melting furnace according to the ratio, then refined in an electroslag furnace, and finally further refined in a vacuum induction consumable furnace. Before each step of refining, the ingot is peeled and the head and tail are cut. The prepared ingot is atomized by argon gas to prepare spherical superalloy particles.

[0061] Including the following steps,

[0062] Step 1, ball milling: use a ball mill to mix superalloy particles with an average diameter of 900 μm and ThO with an average size of 500 nm 2 Powder homogeneously mixed, ThO 2 The mass fraction of the powder is 1%, the ball-to-material ratio is 5:1, the ball milling speed is 400rad / min, the ball milling time is 20h, and ThO 2 Inlaid on the surface of large-sized deformed super...

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Abstract

The present application provides a method for preparing a high-temperature alloy, which includes the following steps: step (1): mixing alloy particles and oxide powder and performing ball milling treatment to obtain a ball milled product; step (2): sintering and densifying the ball milled product to obtain alloy. According to the preparation method of the superalloy of the present application, the strengthening effect of nano-oxides in the alloy can be effectively improved, the purpose of strengthening the alloy can be achieved, and the deformed superalloy as a high-temperature structural part can have excellent oxidation resistance and creep resistance.

Description

technical field [0001] The application belongs to the technical field of alloy preparation, and in particular relates to a method for preparing a superalloy. Background technique [0002] At present, with the rapid development of the aerospace industry, the thrust-to-weight ratio of aircraft increases, and the operating temperature of engine components continues to increase, which promotes the research and development and application of superalloys. In order to improve the thermal strength, oxidation resistance, and high-temperature durability of superalloys, etc. In order to improve the performance, the method of adding strengthening elements to the alloy is often adopted; or, the powder metallurgy method is used to introduce the inert oxide reinforcing phase into the alloy, and the oxide dispersion strengthened superalloy is prepared by high-energy ball milling and hot isostatic pressing or hot extrusion. [0003] However, by adding strengthening elements to the alloy, som...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C19/05C22C32/00C22F1/10
CPCC22C1/051C22C19/056C22C32/0026C22F1/10
Inventor 张瑞崔传勇周亦胄孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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