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A method for forming high-entropy alloys by additive manufacturing technology

A high-entropy alloy and additive manufacturing technology, which is applied in the AlCoCuFeNi high-entropy alloy powder material system and the field of additive manufacturing of high-performance high-entropy alloys, can solve the practical application requirements of unfavorable high-entropy alloys, difficult to form complex structural parts, cooling Slow speed and other problems, to achieve the effect of improving utilization rate and production efficiency, solving the easy segregation of alloy components, and reducing device production costs

Active Publication Date: 2019-02-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, high-entropy alloys are mainly prepared by vacuum arc melting and casting. However, due to the slow cooling rate of the above-mentioned technologies, component segregation is easy to occur, and it is not easy to form complex structural parts, which is not conducive to some practical application requirements of high-entropy alloys.

Method used

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  • A method for forming high-entropy alloys by additive manufacturing technology
  • A method for forming high-entropy alloys by additive manufacturing technology
  • A method for forming high-entropy alloys by additive manufacturing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, the forming process of high-entropy alloy prepared by selective laser melting technology is as follows:

[0033] Model building: use SolidWorks 3D software to build a 3D digital model of the formed part, output it as an STL format file, and incorporate the model file into the selective laser melting equipment;

[0034] Raw material preparation: According to the molar ratio of each atom in the high-entropy alloy Al:Co:Cu:Fe:Ni=1:1:1:1:1:1, the bulk raw materials are accurately weighed and proportioned, and prepared by gas atomization process Pre-alloyed powder, the pre-alloyed powder is sieved, and the selected particle size is 10-55 μm;

[0035] Alloy forming: Selective laser melting equipment is used to form the alloy; the pre-alloyed powder is placed in the powder supply cylinder of the selective laser melting equipment, and the forming chamber is evacuated. When the vacuum degree reaches 1×10 -4 ~1×10 -2 After Pa, fill the molding chamber with a...

Embodiment 2

[0038] In this embodiment, the laser near-net-shape rapid prototyping technology is used to directly prepare the high-entropy alloy forming process as follows:

[0039] Model building: use SolidWorks 3D software to build a 3D digital model of the formed part, output it as an STL format file, and incorporate the model file into the laser near-net-shape rapid prototyping equipment;

[0040] Raw material preparation: According to the molar ratio of each atom in the high-entropy alloy Al:Co:Cu:Fe:Ni=1:1:1:1:1:1, the bulk raw materials are accurately weighed and proportioned, and prepared by gas atomization process Pre-alloyed powder, the pre-alloyed powder is sieved, and the selected particle size is 50-175 μm;

[0041]Alloy forming: the alloy is prepared by laser near-net-shape rapid prototyping equipment; the pre-alloyed powder is placed in the powder feeder of the laser near-net-shape manufacturing equipment, and the working distance between the laser head and the substrate is ...

Embodiment 3

[0043] In this embodiment, the forming process of high-entropy alloy prepared by electron beam selective melting technology is as follows:

[0044] Model building: use SolidWorks 3D software to build a 3D digital model of the formed part, output it as an STL format file, and incorporate the model file into the electron beam selection melting forming equipment;

[0045] Raw material preparation: According to the molar ratio of each atom in the high-entropy alloy Al:Co:Cu:Fe:Ni=1:1:1:1:1:1, the bulk raw materials are accurately weighed and proportioned, and prepared by gas atomization process Pre-alloyed powder, the pre-alloyed powder is sieved, and the selected particle size is 35-125 μm;

[0046] Alloy forming: the alloy is formed by electron beam selective melting equipment; the pre-alloyed powder and metal substrate are placed in the forming room and leveled, and the forming room is evacuated to 1×10 -4 ~1×10 -2 After Pa, filled with helium to prevent the high entropy allo...

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Abstract

The invention relates to the technical field of metal alloy forming and manufacturing, and provides a high-entropy alloy powder material system and an additive manufacturing method thereof. The invention is based on various additive manufacturing technologies such as powder bed selective high-energy beam melting forming and coaxial powder feeding near net forming, and determines the composition of AlCoCuFeNi high-entropy alloy powder and the forming process of additive manufacturing through experiments. The beneficial effects of the invention are: the high-entropy alloy powder provided by the invention and the alloy components prepared by additive manufacturing technology have a simple body-centered cubic structure, high density, excellent mechanical properties, and at the same time, the preparation process is low in cost and easy to operate ,high productivity. Adopting the material and preparation process of the invention can directly add material to manufacture shaped high-entropy alloy parts.

Description

technical field [0001] The invention relates to the field of metal additive manufacturing, in particular to an AlCoCuFeNi high-entropy alloy powder material system, and simultaneously provides a process technology method for additive manufacturing of the alloy with high-performance high-entropy alloys. Background technique [0002] High-entropy alloys break through the traditional alloy design concept, mainly containing five or more components, and the atomic ratio of each element is between 5% and 35%. Alloys exhibit a multi-principal high-entropy effect, form a simple solid solution structure, and have excellent comprehensive properties. In recent years, they have become one of the research hotspots in the field of materials science. At present, high-entropy alloys are mainly prepared by vacuum arc melting and casting. However, due to the slow cooling rate of the above-mentioned technologies, component segregation is easy to occur, and it is not easy to form complex struct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04B22F3/105B33Y10/00B33Y50/00
CPCC22C1/04B33Y10/00B33Y50/00B22F10/00B22F10/36B22F12/13B22F10/32B22F10/366B22F10/25B22F10/28B22F12/49Y02P10/25
Inventor 周香林张咪娜朱武智李景昊
Owner UNIV OF SCI & TECH BEIJING
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