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Quick manufacturing method of titanium-aluminum alloy composite part

A technology for titanium-aluminum alloys and complex parts, which is applied in the direction of improving process efficiency and energy efficiency, and can solve the problems of densification of complex parts, deformation control, high design and manufacturing costs, restrictions on wide application, and macroscopic organization. Avoid segregation and other problems to achieve the effects of preventing sample deformation, fast phase change, and releasing thermal stress

Active Publication Date: 2013-02-27
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium-aluminum-based alloys have the structural characteristics of intermetallic compounds, high hardness and high brittleness, and it is difficult to prepare complex parts by machining methods. Although conventional casting can form complex shapes, the structure is coarse and there is macro-segregation, which leads to its comprehensive mechanics. The performance is poor; the TiAl-based alloy prepared by forging technology is superior to castings in terms of structure and performance, but there is a certain distance from casting technology in the forming of complex parts
The powder metallurgy method can eliminate the defects caused by the casting metallurgy method, but it has not yet solved the problems of densification and deformation control of complex parts. At the same time, the mold is one-time, and the high design and manufacturing costs limit the wide application of this process.

Method used

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  • Quick manufacturing method of titanium-aluminum alloy composite part
  • Quick manufacturing method of titanium-aluminum alloy composite part
  • Quick manufacturing method of titanium-aluminum alloy composite part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Rapid Manufacturing of Ti-48Al-2Nb-2Cr Alloy Blades:

[0025] Step 1. Use CAD to establish a three-dimensional solid model of the Ti-48Al-2Nb-2Cr alloy blade (see the structure in figure 1 ), and then use layering software to divide the three-dimensional solid model into thin layers with a thickness of 0.18mm to obtain the STL format file, and then import the obtained STL format file into the rapid prototyping software of the electron beam rapid prototyping machine;

[0026] Step 2. Put the Ti-48Al-2Nb-2Cr alloy powder prepared by the -100 mesh rotating electrode method into the powder feeding box of the electron beam rapid prototyping machine imported into the STL format file in step 1. Lay it on the powder spreading table, input the scanning parameters, and vacuum the forming cavity to 5×10 -2 Pa began to scan and sinter layer by layer. After sintering, a Ti-48Al-2Nb-2Cr alloy blade with a fine full-lamellar structure with an average crystal group size of 50 μm was o...

Embodiment 2

[0029] Rapid fabrication of cube-shaped Ti-45Al-9Nb-0.3W alloy:

[0030] Step 1. Use CAD to establish a 3D solid model of a 40cm×40cm×40cm cube, and then use layering software to divide the 3D solid model into thin layers with a thickness of 0.05mm to obtain an STL format file, and then import the obtained STL format file into the electron beam In the rapid prototyping software of the rapid prototyping machine;

[0031] Step 2: Put the Ti-45Al-9Nb-0.3W alloy powder prepared by the -200 mesh gas atomization method into the powder feeding box of the electron beam rapid prototyping machine imported into the STL format file in step 1, and spread the powder with 0.05mm Spread the thickness on the powder spreading table, input the scanning parameters, and vacuum the forming cavity to 4×10 -2 Pa began to scan and sinter layer by layer. After sintering, a Ti-45Al-9Nb-0.3W alloy part with a fine full-lamellar structure with an average crystal group size of 30 μm was obtained. The sca...

Embodiment 3

[0034] Rapid fabrication of cube-shaped Ti-45Al-7Nb-0.3W alloy:

[0035] Step 1. Use CAD to establish a 3D solid model of a 40cm×40cm×40cm cube, and then use layering software to divide the 3D solid model into thin layers with a thickness of 0.3mm to obtain an STL format file, and then import the obtained STL format file into the electron beam In the rapid prototyping software of the rapid prototyping machine;

[0036] Step 2. Put the Ti-45Al-7Nb-0.3W alloy powder prepared by the -60 mesh gas atomization method into the powder feeding box of the electron beam rapid prototyping machine imported into the STL format file in step 1, and spread the powder with 0.3mm Spread the thickness on the powder spreading table, input the scanning parameters, and vacuum the forming cavity to 2×10 -2 Pa began to scan and sinter layer by layer. After sintering, a Ti-45Al-7Nb-0.3W alloy part with a fine full-lamellar structure with an average crystal group size of 40 μm was obtained. The scanning...

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Abstract

The invention discloses a quick manufacturing method of a titanium-aluminum alloy composite part. The method comprises the following steps of 1. establishing a three-dimensional solid model of the titanium-aluminum alloy composite part by three-dimensional modeling software, dividing the model into thin layers by layering software, obtaining a STL (stereo lithography) format file, and importing the STL format file into quick forming software of an electronic beam quick forming machine; 2. loading titanium-aluminum alloy powder into a power delivery box of the electronic beam quick forming machine, paving the titanium-aluminum alloy powder on a power paving table by a certain powder paving thickness, inputting scanning parameters, scanning and sintering the titanium-aluminum alloy powder in a layer-by-layer way under the vacuum condition, and obtaining the titanium-aluminum alloy composite part after sintering. The method has the advantages that the utilization rate of material is high, the excessive powder can be repetitively used, the cost is saved, the manufactured titanium-aluminum alloy composite part has fine fully lamellar tissues with an average crystalline cluster size of 30mum to 50mum, and the lamellar structures at the lamellar crystalline cluster interface of the titanium-aluminum alloy composite part are staggered.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium-aluminum alloy complex parts, and in particular relates to a rapid manufacturing method of titanium-aluminum alloy complex parts. Background technique [0002] High-performance complex titanium-aluminum alloy parts have broad application prospects in aerospace and automotive industries. Titanium-aluminum-based alloys have the structural characteristics of intermetallic compounds, high hardness and high brittleness, and it is difficult to prepare complex parts by machining methods. Although conventional casting can form complex shapes, the structure is coarse and there is macro-segregation, which leads to its comprehensive mechanics. The performance is poor; the TiAl-based alloy prepared by forging technology is superior to castings in terms of structure and performance, but there is a certain distance from casting technology in the forming of complex parts. The powder metallurgy m...

Claims

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Application Information

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IPC IPC(8): B22F3/105
CPCY02P10/25
Inventor 贾文鹏杨广宇赵培贺卫卫黄瑜贾亮
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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