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Method for directly molding high-entropy alloy turbine engine hot end component through laser metal

A technology for turbine engine and hot-end components, which is applied in the field of laser metal direct forming of high-entropy alloy turbine engine hot-end components, can solve the problems of difficulty in obtaining high-entropy alloys, difficult processing and manufacturing, and achieves reducing manufacturing costs and meeting application requirements. , the effect of improving efficiency

Active Publication Date: 2015-02-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for directly molding high-entropy alloy turbine engine hot end component through laser metal
  • Method for directly molding high-entropy alloy turbine engine hot end component through laser metal
  • Method for directly molding high-entropy alloy turbine engine hot end component through laser metal

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Experimental program
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Effect test

Embodiment 1

[0053] Five kinds of metals, W, Ti, Zr, V, and Ta, were selected and configured into high-entropy alloy powder according to the equiatomic ratio, and placed in the synchronous powder feeding equipment of LMDF rapid prototyping equipment. UG software is used to establish a 3D CAD model of the hollow turbine blade and sliced ​​and layered, then imported into Magics software to add auxiliary support structures, and the obtained stl format file is then imported into an industrial computer. According to the vapor pressure of these five different elements, the laser power is selected as 200W. At the same time, because the hollow turbine blade has tiny air film holes and exhaust edge structure, and the surface quality and forming accuracy of the formed part are high, it is necessary to use a small The focal length of the lens (100mm) to obtain a fine focus spot size (30μm). The mixed scanning path of contour + grating + partition is adopted, the scanning speed is set to 100 mm / s, and...

Embodiment 2

[0055] Five kinds of metals, W, Ti, Zr, V, and Ta, were selected and configured into high-entropy alloy powder according to the equiatomic ratio, and placed in the synchronous powder feeding equipment of LMDF rapid prototyping equipment. UG software is used to establish a three-dimensional CAD model of the turbine disk, slice and layer it, import it into Magics software to add auxiliary support structures, and then import the obtained stl format file into an industrial computer. According to the vapor pressure of these five different elements, the laser power is selected as 200W. At the same time, due to the fine structure inside the turbine disk and the high requirements for the surface quality and forming accuracy of the formed parts, a lens with a small focal length (100mm) is required to obtain fine Focused spot size (50μm). 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 50 ...

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Abstract

The invention discloses a manufacturing method for directly molding a high-entropy alloy turbine engine hot end component through laser metal, and belongs to the technical field of manufacturing of turbine engine hot end components. The method includes the steps that any five or more kinds of high-melting metal powder is selected from eight kinds of high-melting metal powder, and the high-melting metal powder is evenly mixed to prepare high-entropy alloy powder; a three-dimensional solid model of the turbine engine hot end component is built, necessary auxiliary supporting structures are additionally arranged, and data files in the stl format are obtained and led into a rapid molding device; a blank of the turbine engine hot end component is rapidly molded through the LMDF technology, heat processing is carried out, then the auxiliary supporting structures are removed, abrasive particle stream finish machining and surface processing are carried out, and the high-entropy alloy turbine engine hot end component with the good high-temperature behavior is obtained. The turbine engine hot end component molded with the method has the high density and the excellent high-temperature behavior; meanwhile, the high molding precision and the high surface precision are achieved, and rapid and accurate manufacturing of the high-performance turbine engine hot end component can be achieved.

Description

technical field [0001] The invention belongs to the technical field of manufacturing hot-end components of a turbine engine, and in particular relates to a method for directly forming a hot-end component of a high-entropy alloy turbine engine by laser metal. 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 and air...

Claims

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Application Information

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IPC IPC(8): B22F3/105
CPCY02P10/25
Inventor 张航鲁中良杨强李涤尘
Owner XI AN JIAOTONG UNIV
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