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Preparation and test method of a nickel-based superalloy powder rapid melting sample

A technology of nickel-based superalloy and alloy powder, which is applied in the preparation of test samples, etc., can solve the problems of difficult to control the heating rate, limited optional space for cooling rate control, and far from the actual state.

Active Publication Date: 2017-11-21
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the method for the microstructure transformation of the original loose powder of the alloy at high temperature was mainly heated by an ordinary heating furnace. The disadvantages are: first, the heating rate is very slow, which is far from the actual state of the process; second, the heating rate is difficult to control. It cannot meet the needs of determining the law of tissue evolution at different temperatures; third, the control of the cooling rate of the protective atmosphere is limited; fourth, it is difficult to achieve accurate recording of rapid response

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The steps of the preparation and test method of the superalloy powder rapid melting sample are:

[0020] (1) Argon gas atomization is used to prepare superalloy powder. The weight percentage composition of the alloy is: 12.9Cr-20.2Co-2.0W-3.9Mo-3.5Al-3.7Ti-1.0Nb-2.3Ta-0.02C-0.03B- 0.05Zr-the balance is Ni;

[0021] (2) Put the sieved alloy powder into a stainless steel tube for sheathing, degassing and sealing welding. The particle size range of the alloy powder is 45 μm to 63 μm;

[0022] (3) The hot isostatic pressing method is used to loosely consolidate the alloy powder in the sheath, and the hot isostatic pressing temperature is 800°C (far lower than the conventional hot isostatic pressing temperature of the alloy, which is 1170-1190°C);

[0023] (4) After hot isostatic pressing, the outer shape of the sheath is processed into a bright cylindrical shape to become a sample. The diameter of the sample is 6mm and the length is 40mm;

[0024] (5) Put the sample into ...

Embodiment 2

[0027] The steps of the preparation and test method of the superalloy powder rapid melting sample are:

[0028] (1) Argon gas atomization is used to prepare superalloy powder. The weight percentage composition of the alloy is: 12.9Cr-20.2Co-2.0W-3.9Mo-3.5Al-3.7Ti-1.0Nb-2.3Ta-0.02C-0.03B- 0.05Zr-the balance is Ni;

[0029] (2) Put the sieved alloy powder into a stainless steel tube for sheathing, degassing and sealing welding. The particle size range of the alloy powder is 45 μm to 63 μm;

[0030] (3) The hot isostatic pressing method is used to loosely consolidate the alloy powder in the sheath, and the hot isostatic pressing temperature is 800°C (far lower than the conventional hot isostatic pressing temperature of the alloy, which is 1170-1190°C);

[0031] (4) After hot isostatic pressing, the outer shape of the sheath is processed into a bright cylindrical shape to become a sample. The diameter of the sample is 6mm and the length is 40mm;

[0032] (5) Put the sample into ...

Embodiment 3

[0035] The steps of the preparation and test method of the superalloy powder rapid melting sample are:

[0036] (1) Argon gas atomization is used to prepare superalloy powder. The weight percentage composition of the alloy is: 12.9Cr-20.2Co-2.0W-3.9Mo-3.5Al-3.7Ti-1.0Nb-2.3Ta-0.02C-0.03B- 0.05Zr-the balance is Ni;

[0037] (2) Put the sieved alloy powder into a stainless steel tube for sheathing, degassing and sealing welding. The particle size range of the alloy powder is 45 μm to 63 μm;

[0038] (3) The hot isostatic pressing method is used to loosely consolidate the alloy powder in the sheath, and the hot isostatic pressing temperature is 800°C (far lower than the conventional hot isostatic pressing temperature of the alloy, which is 1170-1190°C);

[0039] (4) After hot isostatic pressing, the outer shape of the sheath is processed into a bright cylindrical shape to become a sample. The diameter of the sample is 6mm and the length is 40mm;

[0040] (5) Put the sample into ...

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Abstract

The invention relates to a preparation and test method of a nickel-based high temperature alloy powder rapid melting and solidifying sample. The method comprises the following steps: 1, preparing high temperature alloy powder through adopting an inert gas atomization or plasma rotating electrode technology; 2, screening, putting alloy powder with certain granularity in the sheath of a stainless steel tube, degassing, and soldering and sealing; 3, carrying out loose solidification on the powder in the sheath through hot isostatic pressing at a temperature being far lower than a routine hot isostatic pressing molding temperature; 4, processing the hot isostatic pressed sheath to form a cylindrical sample with bright appearance; 5, putting the cylindrical sample in a current rapid heating thermal simulation test machine, rapidly heating the sample to different temperatures at different heating rates in protection atmosphere, carrying out heat insulation, cooling, and recording to the temperature curve; and 6, cutting the sample to obtain microstructure, phase structure and component change data of the sample. The method can be used to determine the microstructure change rule of high temperature alloy powder in the melting and solidifying process at different temperatures and heating rates, and can be used for guiding material and thermal technology selection of the high temperature alloy powder.

Description

[0001] The invention relates to a preparation and test method of a nickel-based superalloy powder rapid melting sample, belonging to the field of powder superalloys. Background technique [0002] Gas turbine technology is an important prerequisite and bottleneck for the development of aircraft in my country. Superalloys and their parts forming technology have always been called the heart of gas turbines and have been used to manufacture gas turbine hot end components. At present, powder superalloys are used in advanced gas turbine engines, and the microstructure evolution process from powder to bulk materials during the forming process will directly affect the service performance and life of parts, especially in recent years, some superalloy parts have gradually begun to be applied Advanced rapid prototyping processes, such as 3D printing and spray forming, involve the microstructure evolution of alloy powders during high-speed heating and cooling. These physical and metallurgi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28B22F3/16
Inventor 郑亮张国庆刘娜李周袁华
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS