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A kind of preparation method of superalloy disc for aero-engine

An aero-engine and superalloy technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of alloy segregation, microstructure instability, durability and fatigue performance reduction, etc. The effect of defects

Active Publication Date: 2021-08-31
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the further increase of the service temperature, the traditional nickel-based superalloy parts cannot meet the requirements of the new engine for the disk parts due to factors such as alloy segregation and structural instability. The United States and Russia began to use powder metallurgy at the end of the last century. The method produces nickel-based high-temperature alloy, and the structure of powder metallurgy parts is uniform and the grains are fine, which significantly improves the mechanical properties of the alloy
[0004] However, the production process of powder metallurgy parts is complicated. The conventional process includes alloy smelting, powder preparation, powder screening, hot isostatic pressing of jacket, forging and heat treatment of parts. Based on the uniqueness of powder metallurgy parts, the formed disc parts will There are defects such as PPB, inclusions, and heat-induced holes that seriously affect the performance of powder metallurgy parts, resulting in reduced durability and fatigue performance, and even serious situations such as disc fracture and engine damage, causing major safety accidents

Method used

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  • A kind of preparation method of superalloy disc for aero-engine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing a high-temperature alloy disc for an aero-engine of the present invention is specifically implemented according to the following steps:

[0035] Step 1, using vacuum induction, vacuum consumable smelting and plasma rotating electrode method to prepare superalloy powder; the particle size of the obtained superalloy powder is 53 μm, and the oxygen content is less than 60 ppm;

[0036] Step 2, first use electrostatic equipment to electrostatically remove impurities on the superalloy powder, and vacuumize the electrostatic equipment until the vacuum degree is less than 10 -3 Pa, then filled with argon for protection, after electrostatic removal, the content of non-metallic inclusions in the superalloy powder is less than 5 particles / kg;

[0037] Step 3, use self-made powder degassing deposition equipment in a vacuum less than 5×10 -3 Pa, the temperature is 350°C to degas the superalloy powder. After degassing, the oxygen content of the superalloy pow...

Embodiment 2

[0041] A method for preparing a high-temperature alloy disc for an aero-engine of the present invention is specifically implemented according to the following steps:

[0042] Step 1, using vacuum induction, vacuum consumable smelting and plasma rotating electrode method to prepare superalloy powder; the particle size of the prepared superalloy powder is 60 μm, and the oxygen content is less than 60 ppm;

[0043] Step 2, first use electrostatic equipment to electrostatically remove impurities on the superalloy powder, and vacuumize the electrostatic equipment until the vacuum degree is less than 10 -3 Pa, then filled with argon for protection, after electrostatic removal, the content of non-metallic inclusions in the superalloy powder is less than 5 particles / kg;

[0044] Step 3, use self-made powder degassing deposition equipment in a vacuum less than 5×10 -3 Pa, the temperature is 400°C to degas the superalloy powder. After degassing, the oxygen content of the superalloy powde...

Embodiment 3

[0048] A method for preparing a high-temperature alloy disc for an aero-engine of the present invention is specifically implemented according to the following steps:

[0049] Step 1, using vacuum induction, vacuum consumable smelting and plasma rotating electrode method to prepare superalloy powder; the particle size of the prepared superalloy powder is 102 μm, and the oxygen content is less than 60 ppm;

[0050] Step 2, first use electrostatic equipment to electrostatically remove impurities on the superalloy powder, and vacuumize the electrostatic equipment until the vacuum degree is less than 10 -3 Pa, then filled with argon for protection, after electrostatic removal, the content of non-metallic inclusions in the superalloy powder is less than 5 particles / kg;

[0051] Step 3, use self-made powder degassing deposition equipment in a vacuum less than 5×10 -3 Pa, the temperature is 450°C to degas the superalloy powder. After degassing, the oxygen content of the superalloy po...

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Abstract

The invention discloses a method for preparing a high-temperature alloy disc for an aero-engine, which comprises (1) preparing high-temperature alloy powder; (2) electrostatically removing impurities from the prepared high-temperature alloy powder; (3) electrostatically removing impurities from the high-temperature alloy powder Carry out vacuum degassing, and then use an injector to deposit superalloy powder on a copper annular depositor to obtain a disk blank; (4) use isothermal forging to densify the obtained disk blank; (5) process the obtained disk blank heat treatment. Through the preparation method of the high-temperature alloy disk for aero-engines of the present invention, high-temperature alloy disks meeting the needs of new aerospace engines can be prepared.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy disc preparation, and in particular relates to a method for preparing a high-temperature alloy disc for an aero-engine. Background technique [0002] With the further improvement of the thrust-to-weight ratio requirements of aerospace engines, the gas temperature at the hot end of aero-engines continues to rise, and the requirements for the working temperature and performance of superalloys are getting higher and higher. Excellent performance, more and more widely used in the hot end of the engine. [0003] However, with the further increase of the service temperature, the traditional nickel-based superalloy parts cannot meet the requirements of the new engine for the disk parts due to factors such as alloy segregation and structural instability. The United States and Russia began to use powder metallurgy at the end of the last century. Methods Nickel-based high-temperature alloys ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/115B22F3/17B22F1/00B22F3/24B22F9/10
CPCB22F3/115B22F3/17B22F3/24B22F9/10B22F2003/248B22F1/14
Inventor 宋嘉明瞿宗宏赖运金王庆相梁书锦赵霄昊徐伟张鹏康路巨泽阳安前进
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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