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Two-alloy compounded functionally gradient monocrystal blade material and preparation method thereof

A single crystal blade and functional gradient technology, applied in the direction of polycrystalline material growth, single crystal growth, single crystal growth, etc., can solve the problems such as the inability to meet the design requirements of aero-engines, the time needed for optimization, and the inability to achieve ultra-high temperature service. , to achieve uniform diffusion of solid solution atoms, elimination of low melting point phases between dendrites, and precise control.

Inactive Publication Date: 2015-08-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, traditional Ni-based single crystal superalloys cannot achieve ultra-high temperature service, while IC3 series Ni 3 It takes time to optimize the medium and low temperature properties of Al-based single crystal superalloys
It can be seen that the traditional blade material prepared by continuous single crystal growth using a single superalloy cannot meet the design requirements of the new generation of aero-engines

Method used

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  • Two-alloy compounded functionally gradient monocrystal blade material and preparation method thereof
  • Two-alloy compounded functionally gradient monocrystal blade material and preparation method thereof
  • Two-alloy compounded functionally gradient monocrystal blade material and preparation method thereof

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preparation example Construction

[0036] Based on the above-mentioned directional solidification equipment, the present invention also provides a method for preparing a functionally graded single crystal blade material composed of two alloys, combining figure 1 and figure 2 , the preparation method comprises the steps of:

[0037] In the first step, the top-cast blade formwork is prepared.

[0038] The single crystal blade 306 is placed upright with the top of the blade upward, and the single crystal is obtained by using the crystal lifter 301, the spiral crystal selector 302 and the single crystal amplifier 303, and a narrow channel 305 with a diameter of 0.8-1.2mm is designed to be placed horizontally on the adjacent Between the crystals 301, the height of the narrow channel 305 is 1 / 2 of the height of the crystals 301, so that the crystals 301 are connected to each other; the quality of the required Ni-based superalloy is calculated as the crystals 301, spiral crystal selection The sum of the volumes of ...

Embodiment 1

[0044] The prepared single crystal blade material blade root and leaf middle part selects the second generation Ni-based superalloy, and its composition (w.t.%) is: 7Cr-10Co-0.5Mo-3Re-6W-5.7Al-7Ta-bal.Ni (nearly disclosed Alloy CMSX-4); the top of the blade uses Ni 3 Al-based super high temperature alloy IC31 (patent application number: 201110125242X), its composition is: 3Cr-7Co-6Mo-3Re-2W-7Al-5Ta-bal.Ni. The specific preparation method is as follows:

[0045] The first step is to prepare the top pouring blade formwork 3:

[0046] The blade 306 is placed upright with the top of the blade facing upwards, using the crystal riser 301, the spiral crystal selector 302 and the single crystal amplifier 303 to obtain a single crystal, and a pipe with a diameter of 0.8-1mm is designed as a narrow channel 305 placed horizontally in the adjacent crystal riser Between the crystal risers 301, the height of the narrow channel 305 is 1 / 2 of the height of the crystal riser 301, see figure...

Embodiment 2

[0055] Using the preparation method provided by the present invention, the root and middle of the prepared single crystal blade material are selected from the second generation Ni-based superalloy, and its composition (w.t.%) is: 5Cr-10Co-1.5Mo-3Re-6W-5.4Al-9Ta- bal.Ni (close to the open alloy PWA1484); the top of the blade uses Ni 3 Al-based super high temperature alloy IC32 (patent application number: 201110125242X), its composition is: 6Cr-7Co-8Mo-3Re-2W-7.2Al-5.3Ta-bal.Ni, the specific preparation method steps are as follows:

[0056] The first step is to prepare the top-casting blade formwork 3. The blade 306 is placed upright with the top of the blade upward, and the single crystal is obtained by using the crystal riser 301, the spiral crystal selector 302 and the single crystal amplifier 303, and a pipe with a diameter of 1 mm is designed As the narrow channel 305 is placed horizontally between adjacent crystal risers 301, the height of the narrow channel 305 is 1 / 2 of ...

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Abstract

The invention discloses a two-alloy compounded functionally gradient monocrystal blade material and a preparation method thereof and belongs to the technical field of high-temperature alloy and preparation thereof. The blade root and middle part of a monocrystal blade are made of Ni-based high-temperature alloy, and the blade top of the monocrystal blade is made of monocrystal blade material of Ni3Al-based hyperthermia alloy; the blade root and middle part of the material are predicted to have a better medium and low temperature service performance, and the blade top of the material is predicted to have better hyperthermia service performance. The preparation method comprises the steps of design of form, pouring technology, monocrystal growth control and thermal treatment system. According to the invention, through the design of a narrow passage of a graining device, the longitudinal distribution of two alloys in the blade can be accurately controlled, so that the process stability and material designability are greatly improved; the obtained monocrystal blade material realizes functionally gradient service and meets the design demands of new-generation aero-engines.

Description

technical field [0001] The present invention relates to Ni base superalloy and Ni 3 The fields of single crystal blade preparation and heat treatment of Al-based superalloys, especially a Ni-based superalloy and Ni 3 A functionally graded single crystal blade material compounded with an Al-based ultra-high temperature alloy and a preparation method thereof. Background technique [0002] With the rapid development of aviation technology and the increasingly tense international situation, the development of fourth-generation (or even fifth-generation) aviation fighters is of great significance to national military strategy and national defense security, and the thrust-to-weight ratio of research and development with independent intellectual property rights is 12-15 The new generation of aero-engine is the top priority. The higher thrust-to-weight ratio comes from the higher temperature in front of the turbine. The temperature of the new-generation aero-engine blades will be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22C9/04C22F1/10C30B11/00C30B29/52F01D5/28
Inventor 宫声凯茹毅裴延玲张安琪侯皓章陈明赵海坤李树索
Owner BEIHANG UNIV
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