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A kind of copper alloy powder for additive manufacturing and its preparation method and application

A technology of additive manufacturing and copper alloy, which is applied in the field of metal powder materials, can solve the problems of unsatisfactory demand, cumbersome process, and inability to meet the requirements of additive manufacturing preparation process, etc.

Active Publication Date: 2021-09-14
西安国宏天易智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the copper alloy parts of domestic aero-engines are processed by machining, the process is cumbersome and the cycle is long. With the increase of complex structural parts, machining can no longer meet the demand; additive manufacturing can solve the forming of complex structural parts, while the current copper Alloy metal powder materials cannot meet the preparation process requirements of additive manufacturing

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0031] A preparation method for the above-mentioned copper alloy powder, specifically comprising the following steps:

[0032] Step 1, material preparation:

[0033] Get raw material Cr powder, Zr powder and Cu powder;

[0034] Step 2, drying and deoxidizing the material obtained in step 1 before additive manufacturing;

[0035] The drying process is to keep warm at 100-150°C for 1-3 hours, and the drying process is carried out in a vacuum protection environment;

[0036] Step 3: Mix the Cr powder, Zr powder and Cu powder material after drying in step 2 to prepare a rod, specifically compress the Cr powder, Zr powder and Cu powder material to prepare a rod, and then use the gas atomization method Copper alloy powder is obtained by forming a powder with a particle size of 15-150 μm; or grinding the dried Cr, Zr and Cu materials to obtain Cr powder, Zr powder and Cu powder materials with a particle size of 15-150 μm, and then the particle size is 15 Copper alloy powder can be...

Embodiment 1

[0042] Step 1, take the following materials by mass percentage: Cr powder: 0.4%, Zr powder: 0.14%, and the balance is Cu powder;

[0043] Step 2, heat the above materials at 150°C for 1 hour, and dry them in a vacuum protection environment. Grind the dried materials to obtain a fine and uniform powder with a particle size of 15 μm, which can be used for additive manufacturing Copper alloy metal powder materials;

[0044]Step 3. Put the copper alloy metal powder prepared in step 2 in the 3D printer powder cylinder, and use Ar gas to replace the forming chamber with inert gas until the oxygen content is reduced to 1000ppm. The pressure in the forming chamber is 40mba, the working pressure is 3.8bar, and blown Speed ​​950r / min;

[0045] Step 4. Set the power of the 3D printer to 420W, the scanning speed to 650mm / s, the rotation angle to 30°, the scanning distance to 80μm, the printing layer thickness to 0.03mm, and the track spacing to 0.04mm, then start the device for 3D printi...

Embodiment 2

[0048] Step 1, take the following materials by mass percentage: Cr: 0.6%, Zr: 0.13%, and the balance is Cu powder;

[0049] Step 2, heat the above materials at 140°C for 1.5 hours, and dry them in a vacuum protection environment. Grind the dried materials to obtain a fine and uniform powder with a particle size of 30 μm, which can be used for additives Manufactured copper alloy metal powder materials;

[0050] Step 3. Put the copper alloy metal powder prepared in step 2 in the 3D printer powder cylinder, and use Ar gas to replace the forming chamber with inert gas until the oxygen content is reduced to 990ppm. The pressure in the forming chamber is 42mba, the working pressure is 3.8bar, and blown Speed ​​950r / min;

[0051] Step 4. Set the power of the 3D printer to 430W, the scanning speed to 550mm / s, the rotation angle to 35°, the scanning distance to 60μm, the printing layer thickness to 0.03mm, and the track spacing to 0.04mm. Then start the device for 3D printing and wait...

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Abstract

The invention discloses a copper alloy powder for additive manufacturing and its preparation method and application. Cr powder, Zr powder and Cu powder are prepared into copper alloy powder according to a specific ratio. The eutectic temperature of the alloy is 1072°C. At the eutectic temperature, the maximum solid solubility of chromium in copper is 0.65%. Using the 3D printing forming process, when the 3D printing forming power is 420-500W, a high temperature is generated, so that the second chromium is precipitated inside the copper grain and on the grain boundary. Phase Cu 5 Zr and other multi-component compounds, the printing process decreases with the temperature at 150 ° C, as the temperature decreases, the solid solubility drops sharply, and the Cr-particle phase is precipitated. The addition of chromium can significantly increase the recrystallization temperature and thermal strength of the alloy. Therefore, Cu-Cr-Zr copper alloy powder is more suitable for additive manufacturing forming technology than ordinary copper alloy materials, and the density of the obtained material is 8.5-8.9g / cm 3 , the tensile strength is 260-330MPa, the elongation after fracture is 18-25%, and the yield strength is 220-270MPa, which meets the forming requirements of additive manufacturing.

Description

technical field [0001] The invention belongs to the technical field of metal powder materials, and relates to a copper alloy powder used for additive manufacturing and a preparation method and application thereof. Background technique [0002] Cu-Cr-Zr copper alloy has excellent physical, chemical and mechanical properties; it is a copper alloy with good electrical and thermal conductivity and high strength. Widely used in aviation and aerospace engine combustion chambers. Due to the continuous development of the aviation and aerospace fields, the demand for complex structural parts has increased, and the traditional machining process can no longer meet the demand. [0003] With the continuous improvement of industrialization, additive manufacturing has been widely used in the above fields. The working principle of additive manufacturing makes it have unique advantages in the production of complex structural parts. In other words, the more complex the shape and structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C9/00B22F9/04B22F9/12B22F10/28B33Y70/00B33Y10/00
CPCB22F1/0003C22C9/00B22F9/04B22F9/12B33Y70/00B33Y10/00B22F10/00B22F10/362B22F10/34B22F10/28B22F10/36B22F10/366B22F10/38B22F10/32Y02P10/25
Inventor 史见李哲于全成兰亚洲
Owner 西安国宏天易智能科技有限公司
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