Copper alloy powder for additive manufacturing and preparation method and application thereof

A technology of additive manufacturing and copper alloy, which is applied in the field of metal powder materials, can solve the problems of long cycle, cumbersome process, and unsatisfactory demand, and achieve the effect of improving thermal strength and recrystallization temperature

Active Publication Date: 2019-08-13
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
Comparison scheme
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 Powder with a particle size of 15-150 μm to obtain copper alloy powder; or grind 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 obtained by mixin...

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 copper alloy powder for additive manufacturing and a preparation method and application thereof. The copper alloy powder is prepared from Cr powder, Zr powder and Cu powder according to the specific proportion, the eutectic temperature of the alloy is 1,072 DEG C, the maximum solid solubility of chromium in copper is 0.65% at the eutectic temperature, high temperature is generated when the 3D printing forming power is between 420 W and 500 W through a 3D printing forming technology, a second phase Cu5Zr and other polycompounds which are separated out in copper grains and on the grain boundaries of the copper grains are cooled to 150 DEG C or below along with the temperature in the printing process, the solid solubility is rapidly decreased along with lowering of thetemperature, and a Cr-particle phase is separated out. Through addition of chromium, the recrystallization temperature and the heat resistance of the alloy are obviously improved. Therefore, the Cu-Cr-Zr copper alloy powder can be better suitable for an additive manufacturing forming technology compared with a common copper alloy material, and the obtained material has the characteristics that the density is between 8.5 g / cm<3> and 8.9 g / cm<3>, the tensile strength is between 260 MPa and 330 MPa, the percentage elongation after fracture is between 18%-25%, and the yield strength is between 220 MPa and 270 MPa and meets the additive manufacturing forming requirements.

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 Applications(China)
IPC IPC(8): B22F1/00C22C9/00B22F9/04B22F9/12B22F3/105B33Y70/00B33Y10/00
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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