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High-strength Al-Fe-Sc alloy capable of being used for laser additive manufacturing

An al-fe-sc, laser additive technology, applied in the directions of additive manufacturing, additive processing, process efficiency improvement, etc., can solve problems such as increasing the difficulty of preparation, low output, and easy cracking

Active Publication Date: 2021-05-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) The traditional method has many preparation processes, including melt purification, modification treatment, billet forming, processing and forming, surface treatment and other links
There are many control factors in each link, which increases the difficulty of preparation
[0005] (3) Traditional production and processing methods cannot manufacture alloy products with complex shapes, and at the same time, the output is low, the cost is high, the yield is low, and the processing cost is high
If the traditional Al-Fe alloy is directly used for laser 3D printing, there will be 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 alloys specially suitable for 3D printing. -Fe alloy formula, printing process and heat treatment process

Method used

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  • High-strength Al-Fe-Sc alloy capable of being used for laser additive manufacturing
  • High-strength Al-Fe-Sc alloy capable of being used for laser additive manufacturing
  • High-strength Al-Fe-Sc alloy capable of being used for laser additive manufacturing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] SLM printing Al-Fe supersaturated solid solution, containing the following components in mass percentage: Fe: 5.5wt%; Sc: 0.6%; Zr: 0.3wt%; Ti: 0.15%; Si: 0.28wt%; Mn: 0.3 %; Mg: 0.5wt%; Cu: 0.3wt%; the rest is Al.

[0033]The 3D printing Al-Fe supersaturated solid solution powder with the above ingredients is prepared by vacuum melting, and then using argon atomization to make powder: the melting temperature is 850 ° C, and the pressure in the melting furnace is 0.6 MPa; then using argon as the medium to Metal droplets are atomized, and the atomization pressure is 8.5MPa. The particle shape of the prepared powder is spherical, and the powder of 15-53 μm is sieved, which can be used for SLM printing.

[0034] In a vacuum drying oven, the sieved powder was dried at 90°C for 8 hours, and the heating temperature of the substrate was increased to 300°C during printing.

[0035] The above 3D printing aluminum alloy powder fiber laser SLM printing process is, laser power: 4...

Embodiment 2

[0042] SLM printing Al-Fe supersaturated solid solution, containing the following components in mass percentage: Fe: 5.5wt%; Sc: 0.5%; Zr: 0.2wt%; Ti: 0.15%; Si: 0.28wt%; Mn: 0.3 %; Mg: 0.5wt%; Cu: 0.3wt%; the rest is Al.

[0043] The 3D printing Al-Fe supersaturated solid solution powder with the above ingredients is prepared by vacuum melting, and then using argon atomization to make powder: the melting temperature is 850 ° C, and the pressure in the melting furnace is 0.6 MPa; then using argon as the medium to Metal droplets are atomized, and the atomization pressure is 8.5MPa. The particle shape of the prepared powder is spherical, and the powder of 15-53 μm is sieved, which can be used for SLM printing.

[0044] In a vacuum drying oven, the sieved powder was dried at 90°C for 8 hours, and the heating temperature of the substrate was increased to 300°C during printing.

[0045] The above 3D printing aluminum alloy powder fiber laser SLM printing process is, laser power: ...

Embodiment 3

[0048] SLM printing Al-Fe supersaturated solid solution, containing the following components in mass percentage: Fe: 2.0wt%; Sc: 0.6%; Zr: 0.3wt%; Ti: 0.15%; Si: 0.28wt%; Mn: 0.2 %; Mg: 0.3wt%; Cu: 0.3wt%; the rest is Al.

[0049] The 3D printing Al-Fe supersaturated solid solution powder with the above ingredients is prepared by vacuum melting, and then using argon atomization to make powder: the melting temperature is 850 ° C, and the pressure in the melting furnace is 0.6 MPa; then using argon as the medium to Metal droplets are atomized, and the atomization pressure is 8.5MPa. The particle shape of the prepared powder is spherical, and the powder of 15-53 μm is sieved, which can be used for SLM printing.

[0050] In a vacuum drying oven, the sieved powder was dried at 90°C for 8 hours, and the heating temperature of the substrate was increased to 250°C during printing.

[0051] The above 3D printing aluminum alloy powder fiber laser SLM printing process is, laser power: ...

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Abstract

The invention discloses a high-strength Al-Fe-Sc alloy capable of being used for laser additive manufacturing. A preparation method of the high-strength Al-Fe-Sc alloy capable of being used for laser additive manufacturing comprises the steps that according to the composition proportion, raw materials are weighed to be prepared into a mixture, and vacuum melting and argon atomization are carried out. The raw materials comprise the following components in percentage by mass: 2.5-5.5 wt% of Fe; 0.3-0.6 wt% of Sc; 0.1-0.3 wt% of Zr; 0.1-0.15% of Ti; 0.2-0.28 wt% of Si; 0.3-0.5% of Mn; 0.3-0.5 wt% of Mg; 0.2-0.3 wt% of Cu; and the balance Al. The 3D printing Al-Fe alloy is a supersaturated solid solution, Fe elements are almost completely dissolved in Al crystal lattices, the maximum solid solubility of the Fe elements can reach 5.5 wt%, the problem that a traditional Al-Fe alloy cannot be subjected to supersaturated solid solution is solved, and compared with an existing Al-Fe alloy prepared through smelting casting and forging, the 3D printing Al-Fe alloy is good in mechanical property, high in yield strength and low in anisotropy.

Description

technical field [0001] The invention belongs to the technical field of special materials for additive manufacturing, and in particular relates to a high-strength Al-Fe-Sc alloy that can be used for laser additive manufacturing. Background technique [0002] Al-Fe alloy has high strength, excellent weldability, corrosion resistance and thermal shock resistance, low crack sensitivity, brazing, low cost, and good mechanical properties at high temperatures, and can be widely used in building materials, automobiles, and machinery manufacturing , Ship aluminum master alloy and chemical industry. This alloy has high quenching sensitivity and cannot be strengthened by quenching treatment. In order to obtain good mechanical properties, work hardening is usually used. So far, such alloy products mainly adopt the traditional method: after smelting and casting, the cast slab is formed by rolling, extrusion, forging and other processing methods. The alloy products prepared by these meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00B22F10/28B22F10/64B22F1/00B22F9/08B33Y10/00B33Y40/20B33Y70/00
CPCC22C21/00B22F3/24B22F9/082B33Y10/00B33Y70/00B22F2003/248B22F2009/0824B22F2009/0848B22F1/065B22F1/142Y02P10/25
Inventor 李瑞迪王悦婷袁铁锤
Owner CENT SOUTH UNIV
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