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A special al-cr heat-resistant alloy powder for 3d printing, preparation method, application and al-cr heat-resistant alloy

A 3D printing, heat-resistant alloy technology, used in additive manufacturing, additive processing, etc., can solve the problems of poor mechanical properties, easy cracking, etc., and achieve the effect of high density, low anisotropy, and good thermodynamic stability.

Active Publication Date: 2022-05-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct laser 3D printing of traditional Al-Cr alloys will cause problems such as poor mechanical properties and easy cracking of the product. In order to adapt to the dynamic metallurgy of 3D printing and improve the performance of prefabricated aluminum alloys, it is necessary to invent Al that is specially suitable for 3D printing. -Cr heat-resistant alloy formula, printing process and heat treatment process

Method used

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  • A special al-cr heat-resistant alloy powder for 3d printing, preparation method, application and al-cr heat-resistant alloy
  • A special al-cr heat-resistant alloy powder for 3d printing, preparation method, application and al-cr heat-resistant alloy
  • A special al-cr heat-resistant alloy powder for 3d printing, preparation method, application and al-cr heat-resistant alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) configure metal powder, prepare according to the mass percentage content, the composition is as follows: Cr: 4.0wt%, Mg: 1.0wt%, Mn: 0.5%, Sc: 0.7wt%, Zr: 0.35wt%, Si: 0.1% , and the rest are Al;

[0047] (2) Vacuum smelting: Put the pure metal block containing the above components into a vacuum induction furnace for heating and smelting; the vacuum smelting temperature is 850°C, and the air pressure in the smelting furnace is 0.6MPa;

[0048] (3) atomization powder making: using argon gas as the medium to atomize metal droplets, the atomization pressure is 8.5MPa, to obtain pre-alloyed powder;

[0049] (4) Sieving: Sieve and classify the pre-alloyed powder, and sieve the powder of 15-53 μm, which is used as the raw material powder required for 3D printing;

[0050] (5) Drying treatment: place the sieved pre-alloyed powder in a drying oven for drying at a drying temperature of 90°C for 8 hours;

[0051] (6) 3D printing: the above 3D printed aluminum alloy powder i...

Embodiment 2

[0060] (1) configure metal powder, prepare according to the mass percentage content, the composition is as follows: Cr: 4.0wt%, Mg: 0.7wt%, Mn: 0.3%, Sc: 0.7wt%, Zr: 0.35wt%, Si: 0.1% , and the rest are Al;

[0061] (2) Vacuum smelting: Put the pure metal block containing the above components into a vacuum induction furnace for heating and smelting; the vacuum smelting temperature is 850°C, and the air pressure in the smelting furnace is 0.6MPa;

[0062] (3) atomization powder making: using argon gas as the medium to atomize metal droplets, the atomization pressure is 8.5MPa, to obtain pre-alloyed powder;

[0063] (4) Sieving: Sieve and classify the pre-alloyed powder, and sieve the powder of 15-53 μm, which is used as the raw material powder required for 3D printing;

[0064] (5) Drying treatment: place the sieved pre-alloyed powder in a drying oven for drying at a drying temperature of 90°C for 8 hours;

[0065] (6) 3D printing: the above 3D printed aluminum alloy powder i...

Embodiment 3

[0069] (1) configure metal powder, prepare according to the mass percentage content, the composition is as follows: Cr: 2.5wt%, Mg: 0.8wt%, Mn: 0.5%, Sc: 0.5wt%, Zr: 0.2wt%, Si: 0.1% , and the rest are Al;

[0070] (2) Vacuum smelting: Put the pure metal block containing the above components into a vacuum induction furnace for heating and smelting; the vacuum smelting temperature is 850°C, and the air pressure in the smelting furnace is 0.6MPa;

[0071] (3) atomization powder making: using argon gas as the medium to atomize metal droplets, the atomization pressure is 8.5MPa, to obtain pre-alloyed powder;

[0072] (4) Sieving: Sieve and classify the pre-alloyed powder, and sieve the powder of 15-53 μm, which is used as the raw material powder required for 3D printing;

[0073] (5) Drying treatment: place the sieved pre-alloyed powder in a drying oven for drying at a drying temperature of 90°C for 8 hours;

[0074] (6) 3D printing: the above 3D printed aluminum alloy powder is...

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Abstract

The invention discloses a special Al-Cr heat-resistant alloy powder for 3D printing, a preparation method, an application and an Al-Cr heat-resistant alloy. The Al-Cr heat-resistant alloy powder is a pre-alloyed powder, which includes Cr : 3~4.5%, Mg: 0.5~1.2%, Mn: 0.3~0.5%, Sc: 0.3~0.8%, Zr: 0.1~0.4%, Si: 0.05~0.55%, and the rest is Al; the 3D printing The special Al-Cr heat-resistant alloy powder is screened and dried; after the drying process, the coaxial powder feeding 3D printing is carried out. The density of the Al-Cr heat-resistant alloy obtained by the present invention exceeds 99%, and the average hardness reaches 150HV 0.2 , The tensile strength at 200 ° C is nearly 300Mpa, the structure is fine and uniform, the density is high, the anisotropy is low, and it has excellent room temperature performance and high temperature performance.

Description

technical field [0001] The invention belongs to the technical field of materials for additive manufacturing, and specifically relates to a special Al-Cr heat-resistant alloy powder for 3D printing, a preparation method, an application and an Al-Cr heat-resistant alloy. Background technique [0002] Additive manufacturing of aluminum alloys caters to the development trend of light weight, high strength and structural optimization in the manufacturing industry, and has a wide range of demands in aviation, aerospace, automobiles, ships and other industries. At home and abroad, it attaches great importance to its development. Companies such as Boeing, Airbus, and General Electric have made key arrangements for the research and promotion of additive manufacturing aluminum alloys. However, with the rapid development of industry, its performance requirements are no longer limited to normal temperature performance. For example, in the field of aerospace, the hypersonic vehicles tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/08B22F10/28B33Y70/00B33Y10/00C22C21/00C22C1/04
CPCB22F1/0003B22F9/082C22C21/00C22C1/0416B33Y70/00B33Y10/00
Inventor 李瑞迪王悦婷王敏卜袁铁锤邹亮
Owner CENT SOUTH UNIV
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