CN115747579A - High-toughness additive manufacturing aluminum alloy material and preparation method thereof - Google Patents
High-toughness additive manufacturing aluminum alloy material and preparation method thereof Download PDFInfo
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- 230000000996 additive effect Effects 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
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- 230000005496 eutectics Effects 0.000 claims abstract description 34
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- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/25—Process efficiency
Abstract
The invention discloses a high-toughness additive manufacturing aluminum alloy material and a preparation method thereof, wherein the high-toughness additive manufacturing aluminum alloy material comprises two components of La and Al, and the La content is 0.5-5 wt% and the balance is Al according to weight percentage. The alloy also comprises Ca and/or Cr, wherein the content of the Ca is 0.2-1 wt%, and the content of the Cr is 0.2-1.5 wt%. Ca element is favorable for forming nano eutectic particles as an element for refining the eutectic, and Cr element is favorable for improving heat resistance as a high-temperature stabilizing element. The invention belongs to a heat-treatment-free aluminum alloy material, the printing state is a final use state, and compared with the current commercial Scalmalloy, the production cost is greatly reduced, and the production efficiency is higher.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy manufacturing, and particularly relates to a high-strength and high-toughness additive manufacturing aluminum alloy material and a preparation method thereof.
Background
The laser material increase technology provides a good solution for the traditional machining and manufacturing at present due to high design freedom degree, is different from the traditional material reduction machining, has high material utilization rate in material increase manufacturing, and saves a plurality of subsequent machining process flows. At present, a series of materials based on Al-Si eutectic alloy are mostly applied in the field of aluminum alloy additive manufacturing, are all formed by improving cast aluminum alloy, have excellent fluidity and molten pool feeding capacity, can form a product with extremely high density by a laser additive manufacturing technology, but are limited by a material system, the mechanical property of the material is poor, the tensile strength is generally 300MPa, the yield strength is 180MPa, the elongation is 12%, the material forming property is not high enough even under the rapid cooling condition, and the requirement of manufacturing a complex structural part is difficult to meet. Another system in the aluminum alloy printable material is an Al-Mg-Sc-Zr alloy modified based on an Al-Mg alloy, with a commercial designation ScalmAlloy, which has excellent room temperature strength and toughness, but the material needs to be added with a large amount of rare earth elements, especially Sc, with an addition amount of generally 0.6wt.% to 0.9wt.%, and has very high requirements for the preparation process, and is very easy to react with a crucible and a part of inert gas, which is expensive and has certain safety risk.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides an additive manufacturing aluminum alloy material and a preparation method thereof, which are used for overcoming the problem that the aluminum alloy material prepared in the prior art cannot have high strength and high elongation at break.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-strength and high-toughness additive manufacturing aluminum alloy material comprises 0.5-5 wt% of La and the balance Al.
The high-strength and high-toughness additive manufacturing aluminum alloy material also comprises Ca and/or Cr, wherein the content of the Ca is 0.2-1 wt%, and the content of the Cr is 0.2-1.5 wt%. Ca element is favorable for forming nano eutectic particles as an element for refining the eutectic, and Cr element is favorable for improving heat resistance as a high-temperature stabilizing element.
The high-strength and high-toughness additive manufacturing aluminum alloy material also comprises Mg and/or Cu, wherein the content of Mg is 0.1-0.5wt%, and the content of Cu is 0.2-0.8wt%. Mg and Cu are used as alloy strengthening elements, have an alloy strengthening effect and can improve the mechanical property of the aluminum alloy through alloying.
The particle size of each component of the high-strength and high-toughness additive manufacturing aluminum alloy material is 20-63 mu m.
A preparation method of a high-strength and high-toughness additive manufacturing aluminum alloy material comprises the following steps:
s1: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material comprises La and Al, and the La content is 0.5-5 wt% and the balance is Al according to weight percentage;
s2: preparing an aluminum alloy body in a laser powder bed selective laser melting mode to obtain an aluminum alloy product body material; the energy density of the selective laser melting is kept between 80 and 100J/m, and the scanning speed is kept between 1000 and 3000mm/s; the over-burning of the elements of the aluminum alloy material can be caused by the over-high energy density or the over-low scanning speed, and the alloy components are influenced; too low energy density or too high scanning speed can result in incomplete powder sintering, cracks or air holes in the material and influence on mechanical properties.
S3: and performing stress relief annealing on the aluminum alloy body to obtain an aluminum alloy material, wherein the temperature of the stress relief annealing is 250-300 ℃, and the time of the stress relief annealing is 1-3 h.
In the preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material, in the step S1, the aluminum alloy powder raw material further comprises Ca and/or Cr, wherein the content of Ca is 0.2-1 wt%, and the content of Cr is 0.2-1.5 wt%.
In the preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material, in the step S1, the aluminum alloy powder raw material further comprises Mg and/or Cu, wherein the Mg content is 0.1-0.5wt%, and the Cu content is 0.2-0.8wt%.
In the preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material, in the step S1, the particle size of the aluminum alloy powder raw material is 20-63 μm.
In the preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material, in the step S1, the aluminum alloy powder raw material further comprises nano-scale eutectic second-phase particles, and the particle size of the nano-scale eutectic second-phase particles is 50nm (suggested supplement range value). The high volume fraction and the nano-scale enable the aluminum alloy material to have high strength and elongation at break.
In the step S2 of the preparation method of the high-toughness additive manufacturing aluminum alloy material, the scanning strategy of the selective laser melting is plane progressive scanning and layer-by-layer scanning, and the energy density fluctuation of each layer is less than or equal to 60J/m.
Compared with the prior art, the invention has the beneficial effects that:
1. on the basis of Al-La eutectic alloy, the invention creatively realizes the improvement of the volume fraction of intermetallic compounds and the refinement of particles by Ca and Cr alloying and additive manufacturing methods, and simultaneously contains nano-scale eutectic particles, the strength can be obviously improved by improving the volume fraction of a second phase, and the toughness of the material can also be improved. The invention belongs to a heat treatment-free aluminum alloy material, the printing state is the final use state, and compared with the current commercial Scalmalloy, the production cost is greatly reduced, and the production efficiency is higher.
2. Because the components of the alloy are close to eutectic components and have a smaller solidification temperature range, the alloy has excellent printing formability, good fluidity, small linear shrinkage and small hot cracking tendency.
3. The invention not only has excellent room temperature strong plasticity combination property, but also has high temperature mechanical property which is not comparable to that of AlSi10Mg alloy system.
4. The aluminum alloy material provided by the invention or prepared by the preparation method provided by the invention is tested by GB/T228.1-2010 standard, the strength of the aluminum alloy material is more than or equal to 430MPa, and the elongation at break is more than or equal to 12%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a powder Scanning Electron Microscope (SEM) picture of an aluminum alloy material obtained in example 1 of the invention;
FIG. 2 is an SEM structural view of the as-printed aluminum alloy material obtained in example 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
The high-toughness additive manufacturing aluminum alloy material comprises, by weight, 3wt% of La,1wt% of Ca,1wt% of Cr and the balance of Al. Ca element is favorable for forming nano eutectic particles as an element for refining the eutectic, cr element is favorable for improving heat resistance as a high-temperature stabilizing element, and Mg and Cu are alloy strengthening elements, so that the alloy strengthening effect is realized, and the mechanical property of the aluminum alloy can be improved through alloying. Referring to fig. 1, a powder Scanning Electron Microscope (SEM) picture of the aluminum alloy material of the present embodiment is shown.
The preparation method of this example includes: selecting an aluminum alloy powder with a particle size of 20-63 μm
Feeding; the aluminum alloy powder raw material contains 3wt% La,1wt% Ca,1wt% Cr, and the balance Al; preparing an aluminum alloy body material in a selective laser melting mode to obtain an aluminum alloy product body; the energy density of the selective laser melting is 90J/m, and the scanning speed is 1100mm/s; the scanning strategy of the selective laser melting is plane progressive scanning and layer-by-layer scanning, and the energy density fluctuation of each layer is 20J/m. And sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy body, wherein the temperature of the stress relief annealing is 280 ℃ and the time is 2h so as to eliminate the internal stress of the aluminum alloy material product. The final aluminum alloy material of this example had a strength of 480MPa and an elongation of 10%. Referring to fig. 2, an SEM structural diagram of the aluminum alloy material obtained in this example in the printed state is shown.
In order to test the influence of the selective laser melting mode on the performance index of the product, the contents of the components in the following comparative examples are unchanged, and the test results are as follows:
comparative example 1
The energy density of selective laser melting in this comparative example was 50J/m, scanning, compared to example 1
The speed is 1400m/s; the other steps are the same as in example 1. The density of the aluminum alloy material prepared by the comparative example is 99.5%, the strength is 420MPa, and the elongation is 5%.
Comparative example 2
Compared with the example 1, the energy density of the selective laser melting in the comparative example is 70J/m, and the scanning speed is 900mm/s; the other steps are the same as in example 1. The aluminum alloy material prepared by the comparative example has the density of 99.75%, the strength of 430MPa and the elongation of 7%.
Comparative example 3
Compared with the example 1, the energy density of the selective laser melting in the comparative example is 70J/m, and the scanning speed is 1300mm/s; the other steps are the same as in example 1. The aluminum alloy material prepared by the comparative example has the density of 99.6%, the strength of 450MPa and the elongation of 8%.
Example 2
This example is different from example 1 in that it comprises La, ca, cr, al, and the balance is Al, wherein La is 5wt%, ca is 0.2wt%, and Cr is 0.2 wt%.
The preparation method of this example includes: selecting an aluminum alloy powder feedstock comprising 5wt% La,0.2wt% Cr, the balance Al; the aluminum alloy powder raw material comprises nanoscale eutectic second-phase particles, the particle size of the nanoscale eutectic second-phase particles is 50nm, the volume fraction of the nanoscale eutectic particles can reach 20%, and the particle size of the rest aluminum alloy powder raw materials is 20-50 mu m. The high volume fraction and the nano-scale enable the aluminum alloy material to have high strength and elongation at break. Preparing an aluminum alloy body material in a selective laser melting mode to obtain an aluminum alloy product body; the energy density of the selective laser melting is 80J/m, and the scanning speed is 1000mm/s; and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy body, wherein the temperature of the stress relief annealing is 250 ℃ and the time is 3h, so as to eliminate the internal stress of the aluminum alloy material product.
Example 3
This example is different from example 1 in that it comprises La, cr, cu, and Al, and the content of La is 0.5wt%, the content of Cr is 1.5wt%, the content of Cu is 0.2wt%, and the balance is Al, in terms of weight%.
The preparation method of this example includes: selecting an aluminum alloy powder with a particle size of 40-63 μm
Feeding; the aluminum alloy powder raw material contained 0.5wt% of La,1.5wt% of Cr,0.2wt% of Cu, and the balance of Al; preparing an aluminum alloy body material in a selective laser melting mode to obtain an aluminum alloy product body; the energy density of the selective laser melting is 100J/m, and the scanning speed is 3000mm/s; and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy body, wherein the temperature of the stress relief annealing is 300 ℃ and the time is 1h, so as to eliminate the internal stress of the aluminum alloy material product.
Example 4
The high-toughness additive manufacturing aluminum alloy material provided by the embodiment comprises two components of La and Al, wherein the La content is 5wt% and the balance is Al.
The preparation method of this example includes: selecting an aluminum alloy powder raw material with the grain diameter within the range of 20-40 mu m; the aluminum alloy powder raw material comprises 5wt% of La, and the balance of Al; preparing an aluminum alloy body in a selective laser melting mode to obtain an aluminum alloy product body; the energy density of the selective laser melting is 88J/m, and the scanning speed is 1300mm/s; the scanning strategies of the selective laser melting are plane progressive scanning and layer-by-layer scanning, and the energy density fluctuation of each layer is 50J/m. And (3) carrying out stress relief annealing treatment on the aluminum alloy material body, wherein the temperature of the stress relief annealing is 280 ℃ and the time is 2h, so as to eliminate the internal stress of the aluminum alloy material product. The final aluminum alloy material of this example had a strength of 250MPa and an elongation of 15%.
Example 5
This example differs from example 4 in that it comprises, in weight percent, la in an amount of 3.5wt%, mg in an amount of 0.3wt%, cu in an amount of 0.5wt%, and the balance Al.
The preparation method of this example includes: selecting an aluminum alloy powder raw material with the grain diameter within the range of 50-60 mu m; the aluminum alloy powder raw material contained 3.5wt% La,0.3wt% Mg,0.5wt% Cu, and the balance Al; preparing an aluminum alloy body in a selective laser melting mode to obtain an aluminum alloy product body; the energy density of the selective laser melting is 84J/m, and the scanning speed is 2100mm/s; the scanning strategies of the selective laser melting are plane progressive scanning and layer-by-layer scanning, and the energy density fluctuation of each layer is 40J/m. And (3) carrying out stress relief annealing treatment on the aluminum alloy material body, wherein the temperature of the stress relief annealing is 260 ℃ and the time is 3h, so as to eliminate the internal stress of the aluminum alloy material product.
Example 6
The difference between this example and example 4 is that the alloy comprises La, mg and Al, and the La content is 0.5wt%, the Mg content is 0.5wt%, and the balance is Al.
The preparation method of this example includes: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material comprising 0.5wt% La,0.5wt% Mg, the balance Al, the aluminum alloy powder raw material comprising nano-scale eutectic second phase particles having a particle diameter of 50nm, a volume fraction of the nano-scale eutectic particles of 22%, the particle diameter of the balance aluminum alloy powder raw material being 20 to 30 μm. The high volume fraction and the nano-scale enable the aluminum alloy material to have high strength and elongation at break. Preparing an aluminum alloy body in a selective laser melting mode to obtain an aluminum alloy product body; the energy density of the selective laser melting is 96J/m, and the scanning speed is 2800mm/s; and (3) carrying out stress relief annealing treatment on the aluminum alloy material body, wherein the temperature of the stress relief annealing is 280 ℃ and the time is 3h, so as to eliminate the internal stress of the aluminum alloy material product.
Example 7
The high-toughness additive manufacturing aluminum alloy material provided by the embodiment comprises, by weight, 3wt% of La,1wt% of Ca, and the balance of Al. Ca element is used as the element for refining the eutectic crystal, which is beneficial to the formation of nano eutectic particles.
The preparation method of this example includes: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material comprises 3wt% of La,1wt% of Ca and the balance of Al, the aluminum alloy powder raw material comprises nanoscale eutectic second-phase particles, the particle size of the nanoscale eutectic second-phase particles is 50nm, the volume fraction of the nanoscale eutectic particles is 15%, and the particle size of the balance aluminum alloy powder raw material is 20-40 μm. The high volume fraction and the nano-scale enable the aluminum alloy material to have high strength and elongation at break. Preparing an aluminum alloy body in a selective laser melting mode to obtain the body of the aluminum alloy product; the energy density of the selective laser melting is 88J/m, and the scanning speed is 1300mm/s; the scanning strategies of the selective laser melting are plane progressive scanning and layer-by-layer scanning, and the energy density fluctuation of each layer is 60J/m. And sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy body product, wherein the temperature of the stress relief annealing is 280 ℃ and the time is 2h so as to eliminate the internal stress of the aluminum alloy material product. The final aluminum alloy material of this example had a strength of 430MPa and an elongation of 10%.
Example 8
The difference between the embodiment and the embodiment 7 is that the high-strength and high-toughness additive manufacturing aluminum alloy material comprises, by weight, 5wt% of La,0.2wt% of Ca,0.8wt% of Cu and the balance of Al. Ca element is used as the element for refining the eutectic crystal, which is beneficial to the formation of nano eutectic particles.
The preparation method of this example includes: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material contains 5wt% of La,0.2wt% of Ca,0.8wt% of Cu and the balance of Al, and the aluminum alloy powder raw material contains nanoscale eutectic second-phase particles, the particle size of the nanoscale eutectic second-phase particles is 50nm, the volume fraction of the nanoscale eutectic particles is 10%, and the particle size of the balance of the aluminum alloy powder raw material is 30-54 μm. The high volume fraction and the nano-scale enable the aluminum alloy material to have high strength and elongation at break. Preparing an aluminum alloy body in a selective laser melting mode to obtain the body of the aluminum alloy product; the energy density of the selective laser melting is 92J/m, and the scanning speed is 2600mm/s; and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy body product, wherein the temperature of the stress relief annealing is 290 ℃, and the time is 2 hours, so as to eliminate the internal stress of the aluminum alloy material product.
Example 9
The difference between the embodiment and the embodiment 7 is that the high-toughness additive manufacturing aluminum alloy material comprises, by weight, 0.5wt% of La,0.5wt% of Ca,0.1wt% of Mg, and the balance of Al. Ca element is used as the element for refining the eutectic crystal, which is beneficial to the formation of nano eutectic particles.
The preparation method of this example includes: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material contains 0.5wt% of La,0.5wt% of Ca,0.1wt% of Mg and the balance of Al, and comprises nanoscale eutectic second-phase particles, the particle size of the nanoscale eutectic second-phase particles is 50nm, the volume fraction of the nanoscale eutectic particles is 20%, and the particle size of the balance of the aluminum alloy powder raw material is 30-60 μm. The high volume fraction and the nano-scale enable the aluminum alloy material to have high strength and elongation at break. Preparing an aluminum alloy body in a selective laser melting mode to obtain the body of the aluminum alloy product; the energy density of the selective laser melting is 100J/m, and the scanning speed is 3000mm/s; and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy body product, wherein the temperature of the stress relief annealing is 250 ℃ and the time is 2h, so as to eliminate the internal stress of the aluminum alloy material product.
Compared with the prior art, the invention has the advantages that:
1. the additive manufacturing aluminum alloy material provided by the invention contains nano-scale eutectic particles, the size of the eutectic particles is about 50nm, and the volume fraction of the particles can reach about 20%. According to the metal strengthening theory, the strength of the alloy has an inseparable relationship with the volume fraction, distribution state, morphology and size of the reinforcement. The strength can be significantly improved by increasing the volume fraction of the second phase, but inevitably results in a decrease in ductility and toughness. The key factor for breaking the strong plastic inversion relationship is how to improve the dispersion state of the reinforcement and reduce the size of the reinforcement. On the basis of Al-La eutectic alloy, the invention creatively realizes the increase of the volume fraction of intermetallic compounds and the refinement of particles by Ca and Cr alloying and additive manufacturing methods, which is not reported at home and abroad.
The additive manufacturing aluminum alloy material provided by the invention belongs to a heat-treatment-free aluminum alloy material, the printing state is the final use state, and compared with the current commercial Scalmalloy, the additive manufacturing aluminum alloy material has the advantages that the production cost is greatly reduced, and the production efficiency is higher.
The additive manufacturing aluminum alloy material provided by the invention has excellent printing formability, good fluidity, small wire shrinkage and small hot cracking tendency. This is because the composition of the alloy of the present invention is close to the eutectic composition, having a smaller solidification temperature range.
The additive manufacturing aluminum alloy material provided by the invention has excellent mechanical properties at room temperature and high temperature. The novel material not only has excellent comprehensive performance of room temperature strong plasticity, but also has high-temperature mechanical properties which cannot be compared favorably with an AlSi10Mg alloy system.
The aluminum alloy material provided by the invention or prepared by the preparation method provided by the invention is tested by GB/T228.1-2010 standard, the strength of the aluminum alloy material is more than or equal to 430MPa, and the elongation at break is more than or equal to 12%.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and drawings or directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The high-strength and high-toughness additive manufacturing aluminum alloy material is characterized by comprising two components of La and Al according to weight
The La content is 0.5-5 wt% and the rest is Al.
2. The high-toughness additive manufacturing aluminum alloy material as claimed in claim 1, further comprising
Comprises 0.2 to 1 weight percent of Ca and 0.2 to 1.5 weight percent of Cr.
3. The high-toughness additive manufacturing aluminum alloy material as claimed in claim 1, further comprising
Comprises Mg and/or Cu, wherein the content of Mg is 0.1-0.5wt%, and the content of Cu is 0.2-0.8wt%.
4. The high-toughness additive manufacturing aluminum alloy material as claimed in claim 1, wherein the high-toughness additive manufacturing aluminum alloy material is characterized in that
The particle size of each component is 20-63 μm.
5. The preparation method of the high-toughness additive manufacturing aluminum alloy material according to any one of claims 1 to 4, characterized by comprising the following steps of:
s1: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material comprises La and Al, and the La content is 0.5-5 wt% and the balance is Al according to weight percentage;
s2: preparing an aluminum alloy body in a laser powder bed selective laser melting mode to obtain an aluminum alloy product body material; the energy density of the selective laser melting is kept between 80 and 100J/m, and the scanning speed is kept between 1000 and 3000mm/s;
s3: and performing stress relief annealing on the aluminum alloy body to obtain the aluminum alloy material, wherein the temperature of the stress relief annealing is 250-300 ℃, and the time of the stress relief annealing is 1-3 h.
6. The preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material according to claim 5, wherein the preparation method is characterized in that
In step S1, the aluminum alloy powder raw material further contains Ca and/or Cr, the content of Ca is 0.2 to 1wt%, and the content of Cr is 0.2 to 1.5wt%.
7. The preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material according to claim 5, wherein the preparation method is characterized in that
In step S1, the aluminum alloy powder raw material further contains Mg and/or Cu, the Mg content is 0.1 to 0.5wt%, and the Cu content is 0.2 to 0.8wt%.
8. The preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material according to claim 5, wherein the preparation method is characterized in that
In step S1, the particle diameter of the aluminum alloy powder raw material is 20 to 63 μm.
9. The preparation method of the high-toughness additive manufacturing aluminum alloy material according to claim 5, wherein the preparation method is characterized in that
In step S1, the aluminum alloy powder raw material further includes nano-sized eutectic second phase particles having a particle size of 50nm (suggested supplementary range value).
10. The preparation method of the high-strength and high-toughness additive manufacturing aluminum alloy material according to claim 5, wherein the preparation method is characterized in that
In step S2, the scanning strategy of selective laser melting is planar progressive scanning and layer-by-layer scanning, and the energy density fluctuation of each layer is less than or equal to 60J/m.
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| CN115747579B CN115747579B (en) | 2024-02-02 |
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Citations (8)
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| US20170312857A1 (en) * | 2016-05-02 | 2017-11-02 | Board Of Regents, The University Of Texas System | Methods of additive manufacturing |
| WO2020002813A1 (en) * | 2018-06-25 | 2020-01-02 | C-Tec Constellium Technology Center | Process for manufacturing an aluminum alloy part |
| US20200056268A1 (en) * | 2017-04-13 | 2020-02-20 | Arconic, Inc. | Aluminum alloys having iron and rare earth elements |
| WO2020081150A1 (en) * | 2018-10-17 | 2020-04-23 | Arconic Inc. | Aluminum alloys having iron and rare earth elements |
| CN111496244A (en) * | 2020-04-27 | 2020-08-07 | 中南大学 | Additive manufacturing high-strength aluminum alloy powder and preparation method and application thereof |
| CN113136505A (en) * | 2021-03-15 | 2021-07-20 | 上海交通大学 | High-strength and high-toughness heat-resistant aluminum alloy armature material and preparation method thereof |
| CN113737060A (en) * | 2021-08-18 | 2021-12-03 | 北京科技大学 | AlSiLi phase time-effect strengthened low-density aluminum alloy and preparation method thereof |
| CN114959379A (en) * | 2022-03-31 | 2022-08-30 | 华南理工大学 | Heat-resistant high-strength aluminum alloy suitable for selective laser melting and preparation method thereof |
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| US20170312857A1 (en) * | 2016-05-02 | 2017-11-02 | Board Of Regents, The University Of Texas System | Methods of additive manufacturing |
| US20200056268A1 (en) * | 2017-04-13 | 2020-02-20 | Arconic, Inc. | Aluminum alloys having iron and rare earth elements |
| WO2020002813A1 (en) * | 2018-06-25 | 2020-01-02 | C-Tec Constellium Technology Center | Process for manufacturing an aluminum alloy part |
| WO2020081150A1 (en) * | 2018-10-17 | 2020-04-23 | Arconic Inc. | Aluminum alloys having iron and rare earth elements |
| CN111496244A (en) * | 2020-04-27 | 2020-08-07 | 中南大学 | Additive manufacturing high-strength aluminum alloy powder and preparation method and application thereof |
| CN113136505A (en) * | 2021-03-15 | 2021-07-20 | 上海交通大学 | High-strength and high-toughness heat-resistant aluminum alloy armature material and preparation method thereof |
| CN113737060A (en) * | 2021-08-18 | 2021-12-03 | 北京科技大学 | AlSiLi phase time-effect strengthened low-density aluminum alloy and preparation method thereof |
| CN114959379A (en) * | 2022-03-31 | 2022-08-30 | 华南理工大学 | Heat-resistant high-strength aluminum alloy suitable for selective laser melting and preparation method thereof |
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