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A kind of al-mg-li-sc-zr aluminum alloy powder for additive manufacturing and preparation method thereof

An additive manufacturing and aluminum alloy technology, which is applied in the field of powder preparation for additive manufacturing, can solve the problems of low strength, low application value, and decreased mechanical properties of alloys, and achieve good mechanical properties, simple preparation process, and fine grains. Effect

Active Publication Date: 2021-03-02
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Si element can improve the welding performance of aluminum alloy and improve the forming ability of material additive manufacturing, the mechanical properties of the alloy are greatly reduced due to the addition of Si element. AlSi10Mg printing strength, low application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Al-5Mg-2Li-0.3Sc-0.15Zr alloy powder was prepared, the melting furnace was cleaned before powder making, and the inner wall of the melting chamber was wiped with a cleaning cloth moistened with alcohol. New crucibles should be wiped with an alcohol-moistened cleaning cloth. The smelted raw materials are deoxidized, ultrasonically washed and dried before feeding. Melting process technology: Add pure aluminum ingots into the crucible, and the vacuum degree in the melting chamber reaches 1×10 -2When the temperature is lower than pa, fill the melting chamber with high-purity argon, so that the pressure of the melting chamber is the same as the atmospheric pressure, and start smelting. During the smelting process, first adjust the power of the intermediate frequency furnace so that the temperature in the crucible is 400°C, and preheat the pure aluminum ingot to heat the raw material evenly and release the mixed gas. Heat the overflowing impurity gas in the metal ingot, pre...

Embodiment 2

[0031] To prepare Al-4Mg-3Li-0.4Sc-0.2Zr alloy powder, clean the melting furnace before powder making, and wipe the inner wall of the melting chamber with a cleaning cloth moistened with alcohol. New crucibles should be wiped with an alcohol-moistened cleaning cloth. The smelted raw materials are deoxidized, ultrasonically washed and dried before feeding. Melting process technology: Add pure aluminum ingots into the crucible, and the vacuum degree in the melting chamber reaches 1×10 -2 When the temperature is lower than pa, fill the melting chamber with high-purity argon, so that the pressure of the melting chamber is the same as the atmospheric pressure, and start smelting. During the smelting process, first adjust the power of the intermediate frequency furnace so that the temperature in the crucible is 400°C, and preheat the pure aluminum ingot to heat the raw material evenly and release the mixed gas. Heat the overflowing impurity gas in the metal ingot, preheat for 10 m...

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PUM

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Abstract

The invention relates to a method for preparing Al-Mg-Li-Sc-Zr aluminum alloy powder for additive manufacturing, which comprises the following steps: adding pure aluminum ingots to a crucible in an intermediate frequency furnace, and pre-processing the aluminum ingots Heat; raise the temperature of the melting chamber to 700-850°C, and feed argon gas into the melting chamber after the melting of pure aluminum, so that the pressure of the melting chamber is 0.6-0.9MPa; make the temperature of the melt in the crucible reach 1150-1300°C, Add pure zirconium and keep it warm for 15-25min; adjust the temperature of the crucible to 800-900°C, adjust the pressure of the melting chamber to 0.3-0.7MPa, add the Al-Sc master alloy to melt, and keep it warm for 5-15min; reduce the temperature of the melt in the crucible to 700-790°C, adjust the pressure of the smelting chamber to 0.05-0.15MPa, add pure lithium and magnesium ingots; after the raw materials are completely melted, keep the crucible at 780-820°C; use gas atomization to make powder. Compared with the existing aluminum alloy powder for additive manufacturing, the aluminum alloy powder of the present application has better mechanical properties, and at the same time, the preparation process is simple and the preparation cost is low, which is of great significance to the additive manufacturing of aluminum alloys.

Description

technical field [0001] The invention relates to an Al-Mg-Li-Sc-Zr aluminum alloy powder for additive manufacturing and a preparation method thereof, belonging to the technical field of powder preparation for additive manufacturing. Background technique [0002] Additive manufacturing technology is a kind of rapid prototyping technology. It is based on a three-dimensional model, using metal powder or plastic and other bondable materials to construct three-dimensional three-dimensional parts by scanning layer by layer and stacking layer by layer. Technology. This technology combines various disciplines such as CAD / CAM, optics, numerical control and material science, and has a wide range of applications. It has application prospects in jewelry, medical care, footwear, industrial design, architecture, aerospace, automobiles, education, etc. [0003] At present, for the additive manufacturing of aluminum alloy materials, the powder materials used are relatively fixed, generally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C21/06C22C1/03B22F9/08B33Y70/00
CPCB22F1/0003B22F9/082B22F2009/0848B33Y70/00C22C1/026C22C1/03C22C21/06
Inventor 李晓庚曹玄扬胡盛青
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD