CN115852207A - Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine and preparation method thereof - Google Patents
Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a material-additive manufacturing heat-resistant aluminum alloy material for a high-power automobile engine and a preparation method thereof, and the material-additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises three components of Ce, la and Al, wherein the content of each component is calculated according to the weight percentage, the content of Ce is 2-5 wt%, the content of La is 1-5 wt%, and the balance is Al. The composite material also comprises Ca and/or Mg, wherein the content of the Ca is 0.5 to 2wt%, and the content of the Mg is 0.2 to 0.8wt%. The invention creatively improves the volume fraction of intermetallic compounds through Ca alloying, generates solid solution strengthening effect through Mg element, and realizes the high-strength heat-resistant aluminum alloy material by means of an additive manufacturing method. Thirdly, the aluminum alloy material contains nano-scale eutectic particles, and the high volume fraction of the eutectic particles and the thermal stability of the aluminum alloy material enable the aluminum alloy material to have high strength and heat resistance.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy manufacturing, and particularly relates to a heat-resistant aluminum alloy material for additive manufacturing of a high-power automobile engine and a preparation method thereof.
Background
Aluminum alloys have been increasingly used in place of iron alloys and titanium alloys due to their low density, high specific strength, and good corrosion resistance, and weight is reduced in the manufacture of engine parts such as engine blocks and cylinder heads to achieve weight reduction. Cast engine blocks and engine heads in the U.S. and/or european aluminum alloy standards are mostly using traditional aluminum alloy designations such AS a356, 319, and AS7GU (a 356+ 0.5% cu). Conventional internal combustion engine operating temperatures range from about 160 ℃ to 190 ℃, and engine blocks and cylinder heads cast from these conventional aluminum alloys exhibit good ductility and fatigue performance when operated within the above temperature ranges. Modern light-fuel efficient engines have increased significantly in power density, exhaust temperature, and peak cylinder pressure, raising operating temperatures to 250 ℃ to 350 ℃ much higher than the traditional 160 ℃ to 190 ℃. However, the high temperature strength and creep strength of the conventional aluminum alloy show significant disadvantages due to coarsening or dissolution of precipitated phases at the above temperatures. Therefore, in response to the use requirements of high-power fuel engines, a new aluminum alloy material is needed, which has excellent tensile, creep and fatigue strength properties at higher operating temperatures and can be used in metal casting processes and additive manufacturing processes.
Disclosure of Invention
The invention provides an additive manufacturing heat-resistant aluminum alloy material for a high-power automobile engine and a preparation method thereof, which are used for overcoming the problem that an aluminum alloy material prepared in the prior art cannot have high strength and high temperature resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises three components of Ce, la and Al, wherein the content of each component is calculated according to the weight percentage, the content of Ce is 2-5 wt%, the content of La is 1-5 wt%, and the balance is Al.
The additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine further comprises Ca and/or Mg, wherein the content of Ca is 0.5-2wt%, and the content of Mg is 0.2-0.8wt%.
The additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine further comprises Fe and/or Cu, wherein the content of Fe is 0.1-0.5wt%, and the content of Cu is 0.2-0.5wt%.
The preparation method of the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises the following steps:
s1: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material comprises 2-5 wt% of Ce, la, al and Ce, 1-5 wt% of La and the balance of Al;
s2: preparing an aluminum alloy body by a laser powder bed selective laser melting mode, wherein the energy density of selective laser melting is 70-120J/m, and the scanning speed is 400-1600 mm/s;
s3: and sequentially performing stress relief annealing and strengthening heat treatment on the aluminum alloy body to obtain the aluminum alloy material.
In the preparation method of the heat-resistant aluminum alloy material for additive manufacturing of the high-power automobile engine, in step S1, the aluminum alloy powder raw material further comprises Ca and/or Mg, wherein the content of Ca is 0.5-2wt%, and the content of Mg is 0.2-0.8wt%.
In the preparation method of the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine, in the step S1, the aluminum alloy powder raw material further comprises Fe and/or Cu, wherein the content of Fe is 0.1-0.5wt%, and the content of Cu is 0.2-0.5wt%.
In the preparation method of the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine, in the step S1, the particle size of each component of the aluminum alloy powder raw material is 20-63 mu m.
The preparation method of the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine further comprises nano-scale particles with the particle size of 50nm (supplementing a proper range value), wherein the proportion of the nano-scale particles is not more than 25% of the total volume of all the components of the aluminum alloy powder raw material.
In the preparation method of the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine, in the step S2, the scanning strategy of 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.
In the preparation method of the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine, the stress-relief annealing treatment is performed in the step S3, wherein the temperature of the stress-relief annealing is 250-300 ℃, and the time is 1-3 hours.
Compared with the prior art, the invention has the beneficial effects that:
1. the diffusion rate of the added La and Ce elements in aluminum is extremely low, compared with the conventional alloying elements such as Mg, si, cu and the like, the diffusion rate of the rare earth La and Ce in aluminum is 1-2 orders of magnitude lower than that of the elements, and the stability of the compound structure can be maintained under the action of high temperature and long time. Secondly, rare earth La and Ce can generate Al by reacting with Al 11 Ce 3 And/or Al 11 La 3 The intermetallic compound has stronger thermal stability. On the basis of Al-Ce/La eutectic alloy, the invention creatively improves the volume fraction of intermetallic compounds through Ca alloying, generates solid solution strengthening effect through Mg element, and realizes the high-strength heat-resistant aluminum alloy material by means of an additive manufacturing method. Thirdly, the aluminum alloy material contains nano-scale eutectic particles, and the high volume fraction of the eutectic particles and the thermal stability of the aluminum alloy material enable the aluminum alloy material to have high strength and heat resistance.
2. 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.
3. 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.
4. The invention has excellent mechanical properties at room temperature and high temperature. The mechanical performance indexes at room temperature are as follows: the tensile strength is more than or equal to 450MPa, and the elongation at break is more than or equal to 10 percent. The high-temperature tensile property at 250 ℃ is as follows: the tensile strength is more than or equal to 350MPa, and the breaking elongation is more than or equal to 15.
Drawings
In order to explain the technical solution of the present invention more clearly, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the structures shown in the drawings without inventive work.
FIG. 1 is an SEM photograph of an aluminum alloy powder obtained in example 1 of the present invention;
FIG. 2 is an SEM photograph of the aluminum alloy material obtained in example 1 of the present invention.
Detailed Description
In order to explain the technical solution of the present invention more clearly, the technical solution of the present invention will be described in detail and completely with reference to the following embodiments, 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection 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 embodiment provides an additive manufacturing heat-resistant aluminum alloy material for a high-power automobile engine, which comprises 2wt% of Ce,1wt% of La,1wt% of Ca,0.5wt% of Mg and the balance of Al, wherein the Al is calculated according to weight percentage. La/Ce element is used as rare earth element, has strong binding force with aluminum, can form Al11RE3 intermetallic compound with strong thermal stability with aluminum, and Mg is used as alloy strengthening element, has solid solution strengthening effect, and can improve the mechanical property of aluminum alloy. The SEM image of the aluminum alloy powder of this example is shown in FIG. 1.
The preparation method of this example includes: selecting an aluminum alloy powder raw material with the grain diameter within the range of 20-63 mu m; said aluminum alloy powder raw material comprises 2wt% Ce,1wt% La,1wt% Ca,0.5wt% Mg, and the balance Al; the aluminum alloy product body is prepared in a selective laser melting mode, scanning strategies of selective laser melting are plane progressive scanning and layer-by-layer scanning, the energy density of selective laser melting is 80J/m, the scanning speed is 1100mm/s, and the energy density fluctuation of each layer is less than or equal to 60J/m. And sequentially carrying out stress relief annealing treatment and strengthening heat treatment on the aluminum alloy product body, wherein the temperature of the stress relief annealing is 280 ℃ and the time is 2 hours so as to eliminate the internal stress of the aluminum alloy product. The room-temperature tensile strength of the final aluminum alloy material in the embodiment is 480MPa, and the elongation is 8%. The tensile strength at high temperature of 250 ℃ is 360MPa, and the elongation is 12%. The SEM image of the aluminum alloy material of the embodiment is shown in FIG. 2.
Comparative example 1
Compared with the example 1, the energy density of the selective laser melting in the comparative example is 140J/m, and the scanning speed is 1400mm/s; the other steps are the same as in example 1. The prepared additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine has the room-temperature tensile strength of 450MPa and the elongation of 7%. The tensile strength at high temperature of 250 ℃ is 330MPa, and the elongation is 8%.
Comparative example 2
Compared with the example 1, the energy density of the selective laser melting in the comparative example is 55J/m, and the scanning speed is 1000mm/s; the other steps are the same as in example 1. The room-temperature tensile strength of the final aluminum alloy material of the comparative example is 420MPa, and the elongation is 4%. Tensile strength at 250 ℃ and high temperature of 310MPa, and elongation of 6%.
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 1000m/s; the other steps are the same as in example 1. The aluminum alloy material prepared by the comparative example has the room-temperature tensile strength of 450MPa and the elongation of 14%. The tensile strength at high temperature of 250 ℃ is 330MPa, and the elongation is 16%.
Example 2
The difference between the embodiment and the embodiment 1 is that the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises, by weight, 5wt% of Ce,2wt% of La,0.5wt% of Ca,0.1wt% of Fe and the balance of Al.
The preparation method of the embodiment comprises the following steps: selecting an aluminum alloy powder raw material with the grain diameter within the range of 20-63 mu m; the aluminum alloy powder raw material contained 5wt% Ce,2wt% La,0.5wt% Ca,0.1wt% Fe, and the balance Al; preparing an aluminum alloy product body in a selective laser melting mode; the energy density of the selective laser melting is 70J/m, and the scanning speed is 1600mm/s; and sequentially carrying out stress relief annealing treatment and strengthening heat treatment on the aluminum alloy product 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 product.
Example 3
The difference between the embodiment and the embodiment 1 is that the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises 3wt% of Ce,5wt% of La,0.2wt% of Mg and the balance of Al in percentage by weight.
The preparation method of this example includes: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material contains 3wt% Ce,5wt% La,0.2wt% Mg, and the balance Al; the aluminum alloy powder raw material comprises nano-scale particles with the particle size of 50nm, the proportion of the nano-scale particles is 15 percent of the total volume of the aluminum alloy powder raw material, and the particle size of the rest aluminum alloy powder raw material is 40-63 mu m. The high volume fraction of eutectic particles and the inherent thermal stability enable the aluminum alloy material to have both high strength and heat resistance. Preparing an aluminum alloy product body in a selective laser melting mode; the energy density of the selective laser melting is 120J/m, and the scanning speed is 400mm/s; and sequentially carrying out stress relief annealing treatment and strengthening heat treatment on the aluminum alloy product 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 product.
Example 4
The embodiment provides an additive manufacturing heat-resistant aluminum alloy material for a high-power automobile engine, which comprises three components including Ce, la, mg and Al, wherein the content of the Ce is 2wt%, the content of the La is 2wt%, the content of the Mg is 0.8wt%, 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 20-63 mu m; the aluminum alloy powder raw material contains 2wt% Ce,2wt% La,0.8wt% Mg, and the balance Al; preparing an aluminum alloy body in a selective laser melting mode to obtain an aluminum alloy product body; the scanning strategy of the selective laser melting is plane progressive scanning and layer-by-layer scanning, the energy density of the selective laser melting is 78J/m, the scanning speed is 1300mm/s, and the energy density fluctuation of each layer is less than or equal to 50J/m. And (3) performing stress relief annealing and strengthening heat treatment on the aluminum alloy product 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 body, and finally obtaining the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine. The room-temperature tensile strength of the final aluminum alloy material of the embodiment is 350MPa, and the elongation is 14%. The tensile strength at high temperature of 250 ℃ is 200MPa, and the elongation is 18%.
Example 5
The difference between the embodiment and the embodiment 4 is that the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises 3wt% of Ce,5wt% of La,2wt% of Ca,0.2wt% of Fe and the balance of Al, wherein the contents of the components are calculated according to weight percentage.
The preparation method of the embodiment comprises the following steps: 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 contained 3wt% Ce,5wt% La,2wt% Ca,0.2wt% Fe, and the balance Al; preparing an aluminum alloy body in a selective laser melting mode; the energy density of selective laser melting is 70J/m, and the scanning speed is 1600mm/s; and performing 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 body.
Example 6
The difference between the embodiment and the embodiment 4 is that the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises, by weight, 5wt% of Ce,1wt% of La,0.5wt% of Cu and the balance of Al.
The preparation method of this example includes: selecting an aluminum alloy powder feedstock comprising 5wt% ce,1wt% la,0.5wt% cu, the balance being Al; the aluminum alloy powder raw material comprises nano-scale particles with the particle size of 50nm, the proportion of the nano-scale particles is 25 percent of the total volume of the aluminum alloy powder raw material, and the particle size of the rest aluminum alloy powder raw material is 30-63 mu m. The high volume fraction of eutectic particles and the inherent thermal stability enable the aluminum alloy material to have both high strength and heat resistance. Preparing an aluminum alloy body in a selective laser melting mode to obtain an aluminum alloy product body; the scanning strategy of the selective laser melting is plane progressive scanning and layer-by-layer scanning, the energy density of the selective laser melting is 120J/m, and the scanning speed is 400mm/s; the energy density fluctuation of each layer is less than or equal to 30J/m. And performing stress relief annealing and strengthening heat treatment on the aluminum alloy product 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 body.
Example 7
The embodiment provides an additive manufacturing heat-resistant aluminum alloy material for a high-power automobile engine, which comprises 2wt% of Ce,1wt% of La,1wt% of Ca and the balance of Al, wherein the Al is calculated according to the weight percentage.
The preparation method of the embodiment comprises the following steps: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material contains 2wt% Ce,1wt% La,1wt% Ca, the balance Al; the aluminum alloy powder raw material comprises nano-scale particles with the particle size of 50nm, the proportion of the nano-scale particles is 10 percent of the total volume of the aluminum alloy powder raw material, and the particle size of the rest aluminum alloy powder raw material is 30-63 mu m. The high volume fraction of eutectic particles and the inherent thermal stability enable the aluminum alloy material to have both high strength and heat resistance. 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 85J/m, and the scanning speed is 1100mm/s; and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy product 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 product. The room-temperature tensile strength of the final aluminum alloy material of the present example was 430MPa, and the elongation was 12%. The tensile strength at 250 ℃ and high temperature is 289MPa, and the elongation is 18 percent.
Example 8
The difference between the embodiment and the embodiment 7 is that the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises, by weight, 5wt% of Ce,2wt% of La,0.5wt% of Ca,0.5wt% of Fe,0.2wt% of Cu and the balance of Al.
The preparation method of this example includes: selecting an aluminum alloy powder raw material with the particle size of 20-50 mu m; said aluminum alloy powder raw material contains 5wt% Ce,2wt% La,0.5wt% Ca,0.5wt% Fe,0.2wt% 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 90J/m, and the scanning speed is 800mm/s; and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy product 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 product.
Example 9
The difference between the embodiment and the embodiment 7 is that the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine comprises 4wt% of Ce,5wt% of La,2wt% of Ca,0.3wt% of Cu and the balance of Al according to weight percentage.
The preparation method of this example includes: selecting an aluminum alloy powder raw material with the particle size of 20-50 mu m; the aluminum alloy powder raw material contained 4wt% Ce,5wt% La,2wt% Ca,0.3wt% 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 70J/m, and the scanning speed is 1400mm/s; and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy product body, wherein the temperature of the stress relief annealing is 290 ℃, and the time is 3h, so as to eliminate the internal stress of the aluminum alloy product.
Compared with the prior art, the invention has the innovation points that:
1. the invention contains nano eutectic particles, the size of the eutectic particles is about 50nm, and the volume fraction of the particles can reach about 25%. From the theory of metal heat resistance, it is known that the heat resistance of an alloy is closely related to the volume fraction, distribution state, morphology and thermal stability of intermetallic compounds. The thermal stability of the eutectic second phase is directly related to the crystal structure, chemical composition, and diffusion rate of the constituent elements. On one hand, the diffusion rate of La and Ce elements in aluminum is extremely low, compared with the conventional alloying elements such as Mg, si, cu and the like, the diffusion rate of rare earth La and Ce in aluminum is 1-2 orders of magnitude lower than that of the elements, and the stability of the compound structure can be maintained under the action of high temperature and long time. On the other hand, the rare earth La and Ce can generate intermetallic compounds with high melting points of Al11Ce3 and/or Al11La3 through reaction with Al, and the intermetallic compounds have stronger thermal stability. On the basis of Al-Ce/La eutectic alloy, the invention creatively improves the volume fraction of intermetallic compounds through Ca alloying, generates solid solution strengthening effect through Mg element, and realizes the high-strength heat-resistant aluminum alloy material by means of an additive manufacturing method.
2. 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.
3. The components of the invention are close to eutectic components and have a smaller solidification temperature range, so the printing forming property is excellent, the fluidity is good, the linear shrinkage rate is small, and the hot cracking tendency is small.
4. 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 property superior to AlSi10Mg and commercial Scalmalloy.
5. The aluminum alloy material provided by the invention or prepared by the preparation method provided by the invention adopts GB/T228.1-2010 and GB/T4338-2006 standard tests, and the room temperature mechanical property indexes of the aluminum alloy material are as follows: the tensile strength is more than or equal to 450MPa, and the elongation at break is more than or equal to 10 percent. The high-temperature tensile property at 250 ℃ is as follows: the tensile strength is more than or equal to 350MPa, and the elongation at break is more than or equal to 15.
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 additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine is characterized by comprising Ce,
La and Al, wherein the content of each component is calculated according to the weight percentage, the content of Ce is 2-5 wt%, the content of La is 1-5 wt%, and the balance is Al.
2. The additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine as claimed in claim 1, further comprising 0.5-2wt% of Ca and 0.2-0.8wt% of Mg.
3. The additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine as recited in claim 1, further comprising Fe and/or Cu, wherein the content of Fe is 0.1-0.5wt%, and the content of Cu is 0.2-0.5wt%.
4. The preparation method of the additive manufacturing heat-resistant aluminum alloy material for the high-power automobile engine as claimed in any one of claims 1 to 3, characterized by comprising the following steps of:
s1: selecting an aluminum alloy powder raw material; the aluminum alloy powder raw material comprises 2-5 wt% of Ce, la, al and Ce, 1-5 wt% of La and the balance of Al;
s2: preparing an aluminum alloy body by a laser powder bed selective laser melting mode, wherein the energy density of selective laser melting is 70-120J/m, and the scanning speed is 400-1600 mm/s;
s3: and sequentially carrying out stress relief annealing and strengthening heat treatment on the aluminum alloy body to obtain the aluminum alloy material.
5. Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine according to claim 4
The preparation method is characterized in that in the step S1, the aluminum alloy powder raw material further comprises Ca and/or Mg, the content of the Ca is 0.5-2wt%, and the content of the Mg is 0.2-0.8wt%.
6. Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine according to claim 4
The preparation method is characterized in that in the step S1, the aluminum alloy powder raw material also comprises Fe and/or Cu, wherein the content of Fe is 0.1-0.5wt%, and the content of Cu is 0.2-0.5wt%.
7. Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine according to claim 4
The preparation method is characterized in that in the step S1, the particle size of each component of the aluminum alloy powder raw material is 20-63 mu m.
8. Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine according to claim 7
The preparation method is characterized by further comprising nano-scale particles with the particle size of 50nm (supplemented with proper range values), wherein the proportion of the nano-scale particles is not more than 25 percent of the total volume of all the components of the aluminum alloy powder raw material.
9. Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine according to claim 4
The preparation method is characterized in that in the step S2, the scanning strategies of selective laser melting are plane progressive scanning and layer-by-layer scanning, and the energy density fluctuation of each layer is less than or equal to 60J/m.
10. Additive manufacturing heat-resistant aluminum alloy material for high-power automobile engine according to claim 4
The preparation method is characterized in that the stress relief annealing treatment is carried out in the step S3, the temperature of the stress relief annealing treatment is 250-300 ℃, and the time is 1-3 h.
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| 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 |
| CN113227421A (en) * | 2018-12-24 | 2021-08-06 | Hrl实验室有限责任公司 | Additive manufactured high temperature aluminum alloy and raw materials for manufacturing same |
| CN114829643A (en) * | 2019-12-27 | 2022-07-29 | 俄罗斯工程技术中心有限责任公司 | Heat-resistant aluminum powder material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113227421A (en) * | 2018-12-24 | 2021-08-06 | Hrl实验室有限责任公司 | Additive manufactured high temperature aluminum alloy and raw materials for manufacturing same |
| CN114829643A (en) * | 2019-12-27 | 2022-07-29 | 俄罗斯工程技术中心有限责任公司 | Heat-resistant aluminum powder material |
| 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 |
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