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High-entropy alloy hot-end part manufacturing method of turbine engine on basis of selective laser melting

A selective laser melting and turbine engine technology, which is applied in the direction of turbines, process efficiency improvement, mechanical equipment, etc., can solve the problems of difficult to obtain high-entropy alloys, difficult processing and manufacturing, etc., to reduce manufacturing costs, meet use requirements, improve efficiency effect

Active Publication Date: 2015-01-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, because of the high melting point of high-entropy alloys, it is difficult to process and manufacture them by traditional investment casting methods. The current ceramic molds cannot meet the requirements of such a high temperature. Therefore, it is difficult to obtain high-entropy alloys with traditional processing methods. Parts

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  • High-entropy alloy hot-end part manufacturing method of turbine engine on basis of selective laser melting
  • High-entropy alloy hot-end part manufacturing method of turbine engine on basis of selective laser melting
  • High-entropy alloy hot-end part manufacturing method of turbine engine on basis of selective laser melting

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Comparison scheme
Effect test

Embodiment 1

[0050] Five kinds of high-melting point metal powders, W, Ti, Zr, V, and Ta, were selected and configured into high-entropy alloy powders according to the equiatomic ratio, and placed in the material cylinder of the SLM rapid prototyping equipment. UG software is used to establish a three-dimensional CAD model of the hollow turbine blade, slice and layer it, and import the obtained data into the SLM device. According to the vapor pressure of these five different elements, the selected laser power is 200W. At the same time, because the hollow turbine blade has tiny air film holes and exhaust edge structure, and has high requirements on the surface quality and forming accuracy of the formed part, it is necessary to use a small The focal length of the lens (100mm) to obtain a fine focus spot size (30μm). Scraper type powder spreading device with pre-compacted powder. The mixed scanning path of contour + grating + partition is adopted, the scanning speed is set to 100 mm / s, and t...

Embodiment 2

[0052] Five kinds of metals, W, Ti, Zr, V, and Ta, were selected and prepared into high-entropy alloy powder according to the equiatomic ratio, and placed in the material tank of the SLM rapid prototyping equipment. UG software is used to slice and layer the established three-dimensional CAD model of the turbine disk, and import the obtained data into the SLM device. According to the vapor pressure of these five different elements, the laser power is selected as 200W. At the same time, because the turbine disk has high requirements on the forming surface quality and forming accuracy, a lens with a small focal length (100mm) is required to obtain a fine focus spot size (30μm). . Scraper type powder spreading device with pre-compacted powder. The mixed scanning path of contour + grating + partition is adopted, the scanning speed is set to 100 mm / s, and the scanning layer thickness Δh is 35 μm. Fill the forming chamber with protective gas (argon) to prevent the high-entropy all...

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Abstract

The invention discloses a high-entropy alloy hot-end part manufacturing method of a turbine engine on the basis of selective laser melting and belongs to the technical field of manufacture of hot-end parts of the turbine engine. The high-entropy alloy hot-end part manufacturing method includes firstly selecting five or more of eight kinds of high-melting metal powder of tungsten, titanium, zirconium, hafnium, vanadium, niobium, tantalum and molybdenum, and mixing the powder uniformly according to a certain mole ratio to obtain high-entropy alloy powder; setting up a three-dimensional solid model of a hot-end part of the turbine engine, slicing and layering by software to obtain profile data of various sections, and importing the data into a quick forming device; quickly forming a hot-end part blank of the turbine engine by the SLM technology; thermally treating and finely processing the blank to obtain the high-temperature high-entropy alloy hot-end part of the turbine engine. The formed hot-end part of the turbine engine has high compactness and excellent high temperature performance, has high forming accuracy and surface accuracy and can be quickly and accurately manufactured.

Description

technical field [0001] The invention belongs to the technical field of manufacturing hot-end parts of a turbine engine, and in particular relates to a method for manufacturing a hot-end part of a high-entropy alloy turbine engine based on selective laser melting. Background technique [0002] The hot end components of a turbine engine mainly include turbine blades and turbine disks. Turbine blades are one of the core components of aero-engines. Turbine blades are listed as the first key component because they are located in the parts with the highest temperature, the most complex stress, and the harshest environment, and are known as the "Pearl in the Crown". The manufacturing level will have a direct impact on the overall performance of the aero-engine. The turbine disk is also a core component with key characteristics of an aero-engine, and its quality and performance level have a decisive impact on the reliability, safety life and performance improvement of the engine an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F5/04B22F5/10
CPCY02P10/25
Inventor 张航鲁中良杨强李涤尘
Owner XI AN JIAOTONG UNIV
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