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Dual-performance turbine disc and preparation method thereof

A turbine disk and dual-performance technology, which is applied in the direction of turbines, manufacturing tools, mechanical equipment, etc., can solve the problems of hindering crack growth, different heat treatment systems, and different solution temperatures, so as to reduce weight, increase thrust-to-weight ratio, and optimize design. Effect

Pending Publication Date: 2021-04-27
BEIJING CISRI GAONA TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this process is that the selection of heat treatment system is very complicated
The disadvantage of this method is that the controllability and repeatability of the temperature gradient field are low under long-term heating and holding conditions.
However, the disadvantages of this method are as follows: ①In actual operation, it is necessary to ensure that the powders with three particle sizes are completely unmixed in the three areas of the hub, web, and rim, and the actual operation is very difficult; ②The wheel It is difficult to choose the coarse grain size of the alloy, because the fine grain is more resistant to crack initiation, and the coarse grain is more beneficial to hinder the crack growth. Therefore, only by selecting a suitable coarse grain size can the total crack growth at a certain temperature be guaranteed. lowest rate
[0009] The third method, the disadvantage of using double alloy discs is that if the two alloys are not selected properly, the solid solution temperature will be different during heat treatment, that is, the heat treatment system will be different. The compromise heat treatment of two alloys to obtain satisfactory mechanical properties has become a difficult problem to solve

Method used

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  • Dual-performance turbine disc and preparation method thereof
  • Dual-performance turbine disc and preparation method thereof
  • Dual-performance turbine disc and preparation method thereof

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preparation example Construction

[0045] A method for preparing a dual-performance turbine disk, comprising the steps of:

[0046] (a) Carrying out hot isostatic pressing to the hub alloy powder and the rim alloy powder respectively to obtain the hub disc blank and the rim ring;

[0047] (b) Assembling the hub disk blank and the wheel rim ring, and performing hot isostatic pressure diffusion bonding to obtain a double alloy disk blank;

[0048] (c) heat-treating the bialloy disk blank;

[0049] The hub alloy powder is mainly composed of the following components by mass percentage: C 0.02%-0.09%, Co 7.0%-9.5%, Cr 11.2%-14.0%, W 2.5%-4.2%, Mo 2.4%-4.1% %, Al 2.6%~4.3%, Ti 1.8%~3.0%, Nb 2.6%~4.3%, and the balance Ni;

[0050] The rim alloy powder is mainly composed of the following components by mass percentage: C 0.01%-0.06%, Co 10.5%-15.0%, Cr 14.5%-18.2%, W 2.8%-4.5%, Mo 3.0%- 5.1%, Al 1.8%-3.3%, Ti 2.5%-4.5%, Nb 0.3%-1.1%, and the balance Ni.

[0051] The present invention adopts specific wheel hub alloy ...

Embodiment 1

[0078] This embodiment provides a method for preparing a dual-performance turbine disk, including the following steps:

[0079] (1) The hub is made of FGH4095 alloy, the main chemical composition (by mass percentage) is: Co 8.0%, Cr13.2%, W 3.4%, Mo 3.5%, Al 3.4%, Ti 2.5%, Nb 3.4%, C 0.06 %, Ni balance; the conventional plasma rotating electrode method (PREP) is used to prepare FGH4095 alloy powder, and the particle size of the powder is 50-150 μm.

[0080] The rim is made of FGH4096 alloy, the main chemical composition (by mass percentage) is: Co 13.1%, Cr 16.2%, W 3.9%, Mo 4.0%, Al 2.3%, Ti 3.6%, Nb 0.7%, C 0.03%, Ni balance: the powder is prepared by the conventional plasma rotating electrode method (PREP), and the particle size of the powder is 50-150 μm.

[0081] (2) FGH4095 alloy powder with a particle size of 50-150 μm was put into a carbon steel sheath for simulation experiments, and the sheath after the powder was filled was formed by hot isostatic pressing. Pressur...

Embodiment 2

[0086] This embodiment provides a method for preparing a dual-performance turbine disk, including the following steps:

[0087] (1) The hub is made of FGH4095 alloy, the main chemical composition (by mass percentage) is: Co 8.0%, Cr13.2%, W 3.4%, Mo 3.5%, Al 3.4%, Ti 2.5%, Nb 3.4%, C 0.06 %, Ni balance; the conventional plasma rotating electrode method (PREP) is used to prepare FGH4095 alloy powder, and the particle size of the powder is 50-150 μm.

[0088] The rim is made of FGH4096 alloy, the main chemical composition (by mass percentage) is: Co 13.1%, Cr 16.2%, W 3.9%, Mo 4.0%, Al 2.3%, Ti 3.6%, Nb 0.7%, C 0.03%, Ni balance: the powder is prepared by the conventional plasma rotating electrode method (PREP), and the particle size of the powder is 50-150 μm.

[0089] (2) Put the FGH4095 alloy powder with a particle size of 50-150 μm and the FGH4096 alloy powder with a particle size of 50-150 μm into carbon steel sheaths (corresponding to filling in the hub area and rim area ...

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Abstract

The invention relates to the technical field of rapid solidification powder high-temperature alloy, in particular to a dual-performance turbine disc and a preparation method thereof. The preparation method of the dual-performance turbine disc comprises the following steps of (a) respectively carrying out hot isostatic pressing forming on hub alloy powder and rim alloy powder to obtain a hub disc blank and a rim annular piece; (b) assembling the hub disc blank and the rim annular piece, and carrying out hot isostatic pressing diffusion connection to obtain a double-alloy disc blank; and (c) carrying out heat treatment on the double-alloy disc blank. Specific hub alloy powder and rim alloy powder are adopted, the same or similar hot isostatic pressing system and heat treatment system are achieved, meanwhile, different mechanical properties are achieved, the hub and the rim are in diffusion connection through hot isostatic pressing, the hub and the rim of the turbine disc have different mechanical properties, and the performance requirements of the high-performance aero-engine turbine disc under severe working conditions are met.

Description

technical field [0001] The invention relates to the technical field of rapid solidification powder superalloy, in particular to a dual-performance turbine disc and a preparation method thereof. Background technique [0002] The turbine disk is the core component of the hot end of an aero-engine, and its working conditions are very harsh. The turbine disk is subjected to the superposition of the stress field and the temperature field. Along the radial direction of the turbine disk, the stress gradually increases from the rim to the hub, forming a stress gradient, while the temperature gradually decreases from the rim to the hub, forming a temperature gradient. That is to say, under the working conditions of the turbine disk, the rim is subjected to higher temperature and lower stress, and the hub is subjected to lower temperature and higher stress. In order to meet the mechanical performance requirements of the turbine disk under service conditions, it is necessary to ensure...

Claims

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Application Information

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IPC IPC(8): B22F5/00B22F3/15B22F3/24C21D9/00C22C19/05C22F1/10F01D5/02
CPCB22F5/009B22F3/15B22F3/24C22C19/056C21D9/0068C22F1/10F01D5/02B22F2003/248
Inventor 张义文刘建涛贾建刘明东韩寿波孙志坤陶宇曲敬龙
Owner BEIJING CISRI GAONA TECH
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