CN115786786A - Cast aluminum-copper alloy, and preparation method and application thereof - Google Patents
Cast aluminum-copper alloy, and preparation method and application thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 17
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- 238000002844 melting Methods 0.000 claims description 27
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- 239000010949 copper Substances 0.000 claims description 25
- 239000000243 solution Substances 0.000 claims description 24
- 239000010936 titanium Substances 0.000 claims description 24
- 239000011572 manganese Substances 0.000 claims description 23
- 239000002893 slag Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 13
- 229910052720 vanadium Inorganic materials 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 229910052793 cadmium Inorganic materials 0.000 claims description 9
- 229910052726 zirconium Inorganic materials 0.000 claims description 9
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- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
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- 229910018182 Al—Cu Inorganic materials 0.000 claims description 4
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- 238000005303 weighing Methods 0.000 claims description 4
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- 229910018461 Al—Mn Inorganic materials 0.000 claims description 3
- 229910018580 Al—Zr Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 abstract description 11
- 229910000676 Si alloy Inorganic materials 0.000 abstract description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000919 ceramic Substances 0.000 abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 238000007670 refining Methods 0.000 description 17
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- 230000000694 effects Effects 0.000 description 5
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 4
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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Abstract
The invention provides a cast aluminum-copper alloy, a preparation method and application thereof, wherein the cast aluminum-copper alloy comprises the following components in percentage by mass: 4.8 to 5.3 percent of Cu4; 0.3 to 0.5 percent of Mn0; 0.1 to 0.2 percent of Ti0.1 percent; v0.1-0.2%; zr0.1-0.2%; cd0.1-0.15%; b0.03-0.1%; tiB 2 0.08-0.5%; 0 to 0.15 percent of Fe; the balance being Al. The invention matches submicron TiB by optimizing alloy components 2 The ceramic particles are matched with a heat treatment process to prepare the cast aluminum-copper alloy, the mechanical property of the cast aluminum-copper alloy is equivalent to that of the cast aluminum-copper alloy produced by high-purity aluminum, but the cost of the cast aluminum-copper alloy is reduced by more than 40% compared with that of the aluminum-silicon alloy prepared by using a high-purity aluminum ingot, and the problem of high cost of the high-mechanical alloy caused by impurity limitation is solved. The alloy is used for aviation or automobile castings, and the application field of high-strength and high-toughness cast aluminum-copper alloy is expanded.
Description
Technical Field
The invention relates to a metal material, in particular to a cast aluminum-copper alloy, a preparation method and application thereof.
Background
In recent years, with the development requirements in the fields of aviation and aerospace, high-strength and high-toughness cast Al-Cu alloys with different components have come into play. ZL205A is one of high-strength hard aluminum casting aluminum alloys, has the effects of replacing steel with aluminum and replacing forging with casting due to high strength and high toughness, and is widely applied to the field of automobiles and even aerospace products. With the rapid development of the automobile field at present, the use of the high-strength aluminum alloy has favorable guarantee for the weight reduction and the light weight of the automobile. Therefore, a large number of studies have been conducted on ZL 205A. Through continuous optimization of alloy components, the microstructure is effectively improved, and smelting, casting, heat treatment processes and the like are improved, so that the performance is improved.
ZL205A has Cu as the main strengthening element and forms theta (CuAl) in aluminum alloy 2 ) The phase exists in the crystal boundary in an AL-theta (CuAl 2) network state in an as-cast state, and theta' and theta phases are dispersed in the matrix alpha-AL to play a strengthening role after solid solution strengthening and aging strengthening. The addition of Mn element forms T (AL 12CuMn 2) phase, so that the grain size is refined, the harm of iron in the aluminum alloy is reduced, the Mn content cannot be too high, and when Mn is not less than 1.0%, T phase transformation is coarse, and the performance is deteriorated. ZL205A has a wide solidification interval, mainly paste solidification, poor fluidity, poor feeding, shrinkage porosity and hot cracking tendency, and is important. And the crystal grains are relatively coarse, so that various grain refining elements such as Ti, V, zr, B and the like are added to form high-temperature refractory phases with AL respectively to play a role in refining the crystal grains. Cd is a low-melting-point metal, is not dissolved in Al, exists in an aluminum alloy in a free elementary substance state, basically adheres to an AL-Cu eutectic phase and exists in a solid-solution theta phase, promotes the formation of GP zones and theta ', theta' and theta during heat treatment, and promotes the aging process. Based on the original ZL205, the various alloy elements are solidified and optimized, and AL-TiB is added 2 The seed crystal material has the functions of further refining and strengthening and the performance of the seed crystal material is improved.Adding nanometer-micrometer (100 nm-2 um) TiB 2 The method mainly plays two roles: firstly, the crystal grains are refined as heterogeneous nucleation cores in the aluminum alloy solidification process, and the crystal grains are further refined on the basis of the existing refinement. Secondly, the particles are dispersed and distributed in the crystal grains of the aluminum alloy matrix as particles to play a role in dispersion strengthening and the crystal boundary, and the fine particles distributed at the crystal boundary play a role in hindering the growth of recrystallized grains in subsequent heat treatment. On the premise of slightly improving the elongation, the tensile strength and the yield strength are improved by nearly 10 percent. Further solves the problem of toughness of the aluminum alloy. Because the strength is high and the toughness is good, the requirement of the aluminum alloy for aerospace, military industry, civil use and transportation on the toughness is well met, the requirement of important parts in the field of automobiles is particularly met, and the weight reduction and the light weight of the automobiles are guaranteed.
Meanwhile, with the increasing urgency of automobile lightweight, especially unsprung weight reduction, cast aluminum-silicon alloy shows limitations in performance, especially tensile strength and yield strength. The Al-Cu alloy can make up the performance deficiency of the Al-Si alloy, however, in order to ensure the final mechanical property of the ZL205A aluminum alloy, the ZL205A has high requirements on the impurity content of the aluminum alloy, for example, an aluminum ingot of the ZL205A is generally made of high-purity aluminum (Al is more than or equal to 99.999%), and therefore, the application of the ZL205A aluminum alloy in industries such as automobiles and the like is severely limited by the improvement of the cost of the ZL205A aluminum alloy.
The main alloy elements in the ZL205A aluminum alloy are Cu, V, ti and Zr, and the main impurities are Fe. The impurity Fe is also an important factor influencing the strength and elongation of the alloy. Fe is harmful to the action of ZL205A aluminum alloy relative to other elements, and the higher the Fe content is, the lower the hardness and elongation of the alloy are. Especially the elongation, is seriously impaired. Therefore, even when the Fe content of the alloy is low, it can form an Fe-rich phase, and therefore, the impurities of the Fe content must be strictly controlled. In general, ZL205A is added with a refiner such as Al5TiB or AlTiC during melting to refine the alloy cast structure, but the ZL205A aluminum alloy has limited refining effect and reinforcing effect.
How to solve the problems of the grain refinement, the obdurability matching and the weakening of the influence of impurities on the performance of the ZLZLZ 205A aluminum alloy is an important way for improving the performance and the application of the ZL205A aluminum alloy.
Disclosure of Invention
The invention aims to provide a cast aluminum-copper alloy aiming at the problem that the performance of the traditional ZLZLZLL 205A aluminum alloy can not meet the requirement 2 Ceramic particles are matched with a heat treatment process to prepare the cast aluminum-copper alloy with low cost. The mechanical property of the alloy is equivalent to that of the alloy produced by high-purity aluminum, but the cost is reduced by more than 40% compared with that of a silicon-aluminum alloy prepared by using a high-purity aluminum ingot, so that the problem of high cost caused by impurity limitation of the high-mechanical-property alloy is solved, and the alloy is used for aviation or automobile castings, and the application field of high-strength and high-toughness cast aluminum-copper alloy is expanded.
In order to achieve the purpose, the invention adopts the technical scheme that: the cast aluminum-copper alloy comprises the following components in percentage by mass:
further, the cast aluminum-copper alloy comprises the following components in percentage by mass:
further, ti in the high-strength and high-toughness cast aluminum-silicon-copper-magnesium alloy component is simple substance Ti and/or TiAl 3 。
Further, the tensile strength of the cast aluminum-copper alloy in a T5 heat treatment state is 450MPa-500MPa, the yield strength is 350MPa-400MPa, and the elongation is more than 9%; the tensile strength of the cast aluminum-copper alloy in a T6 heat treatment state is 490MPa-530MPa, the yield strength is 380MPa-460MPa, and the elongation is more than 6%.
The invention also discloses a preparation method of the cast aluminum-copper alloy, which comprises the following steps:
s1, weighing raw materials according to a weight ratio, and carrying out fusion casting to obtain an intermediate melt; removing impurities from the intermediate melt, and removing slag to obtain an alloy ingot;
s2, carrying out solution quenching treatment on the alloy ingot;
and S3, carrying out aging treatment, and cooling to obtain the aluminum-copper alloy.
Further, S1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material, a Ti-containing raw material and a B-containing raw material into a smelting furnace, heating and melting, preserving heat and standing after all the raw materials are dissolved and clear, and then sequentially adding a Cd-containing raw material and a TiB-containing raw material 2 And (3) dissolving the/Al composite material, and standing to obtain an intermediate melt of the required components.
Unless otherwise specified, the Ti-containing raw material is Al-Ti10 intermediate alloy raw material, and TiB is not included 2 。
Further, S1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material, a Ti-containing raw material and a B-containing raw material into a smelting furnace, heating to 760-780 ℃ for melting, preserving heat and standing for 50-70 min after all the raw materials are dissolved, and then sequentially adding a Cd-containing raw material and TiB 2 And (3) dissolving the Al composite material, and standing for 10-15 min to obtain an intermediate melt of the required components.
Further, the impurity removal treatment adopts a slag removing agent to remove impurities.
Furthermore, the modification treatment time is 6-8 h.
Further, the solution quenching treatment of S2 adopts the following process parameters: the solid solution temperature is 530-545 ℃, the solid solution time is 10-18 h, and the quenching temperature is 50-70 ℃. Preferably, the solid solution temperature is 530-540 ℃, the solid solution time is 10-16 h, and the quenching temperature is 60-70 ℃.
Further, the aging treatment of S3 adopts the following process parameters: the aging temperature is 150-170 ℃, and the aging time is 6-14 h. The preferred ageing temperature is 160-170 ℃, and the ageing time is 10-14h.
Further, the cooling in S3 is air cooling.
Obtaining an alloy ingot after casting; casting the alloyAnd carrying out solid solution quenching treatment on the ingot, then carrying out aging treatment, and cooling to obtain the aluminum-copper alloy. The Ti element in the aluminum alloy composition of the invention (in the invention, the Ti element does not contain TiB unless otherwise specified) 2 ) Added in the form of Al-Ti master alloy. TiAl is formed between Ti element and Al 3 The phase becomes a non-spontaneous core during crystallization, and plays a role in refining a cast structure and a weld structure. TiB 2 With TiB 2 Added in the form of/Al composite material, tiB 2 Seed material of hexagonal crystal structure, tiB 2 And the mismatching degree of the plane point front of alpha-Al is less than 15 percent, and from the point of lattice matching, tiB 2 Is a potential nucleation substrate of alpha-Al, can be used as a heterogeneous nucleation core to effectively refine grains in the solidification process, and simultaneously, the sub-micron TiB 2 The ceramic particles are dispersed in the matrix to play a role in dispersion strengthening and improve the strength of the alloy.
Further, the purity of the aluminum ingot is more than 99.00%.
Further, the purity of the aluminum ingot is 99.00-99.77%.
Further, the Cu-containing raw material is Al-Cu intermediate alloy or pure copper; and/or the presence of a gas in the gas,
the Mn-containing raw material is Al-Mn intermediate alloy and/or pure manganese; and/or the presence of a gas in the atmosphere,
the raw material containing Ti is Al-Ti intermediate alloy and/or pure titanium; and/or the presence of a gas in the gas,
the V-containing raw material is Al-V intermediate alloy and/or pure vanadium; and/or the presence of a gas in the gas,
the Zr-containing raw material is Al-Zr intermediate alloy and/or pure zirconium; and/or the presence of a gas in the gas,
the raw material containing Cd is Al-Cd intermediate alloy and/or pure cadmium; and/or the presence of a gas in the gas,
the raw material containing B is Al-B intermediate alloy.
Further, the TiB 2 TiB in/Al composite material 2 Is 20 to 30 percent, preferably 25 to 30 percent.
Further, the TiB 2 The grain diameter of the/Al composite material is 100nm-1.0 mu m. The preferred particle size diameter is 200nm to 500nm.
Further, the TiB 2 the/Al composite material comprises 1.0-2.5 mass percent of B, the molar ratio of Ti to B is =1/2, and the balance is Al and TiB 2 The phase composition of the/Al composite material comprises alpha-Al and TiB 2 ，TiB 2 Average particle size less than 0.6 [ mu ] m, tiB 2 The particles are relatively uniformly dispersed.
Further, the TiB 2 The preparation method of the/Al composite material comprises the following steps:
step (1) raw material preparation, weighing H 3 BO 3 、TiO 2 Aluminum powder, titanium powder and aluminum ingot, wherein H 3 BO 3 ：TiO 2 : al powder: molar ratio of Ti powder = (3.5-5.2): (0.5-2.1): (3.5-5.7): (0.2-1.5), wherein the molar ratio of Ti/B is =1/2, and the aluminum ingot purity is 99.9%;
step (2) reacting H 3 BO 3 And TiO 2 Uniformly mixing, heating at 200-250 ℃ for 1.5-2 h for two hours, removing water, taking out every 20-40 minutes in the removing process, and stirring the powder to ensure that the powder is dried uniformly and is not easy to agglomerate;
step (3) heating the TiO 2 、H 3 BO 3 The aluminum powder and the titanium powder are uniformly mixed, and the uniformly mixed powder is placed in a die and pressed into a block;
step (4) heating the aluminum ingot to 900-1050 ℃ by using a well-type resistance furnace, pressing a graphite bell jar into the block body obtained in the step (3) after the aluminum ingot is completely melted, taking out the bell jar after the reaction is cremated, and carrying out melt self-propagating direct reaction for 5-8min; after the reaction is completed, press C 2 C l6 Refining, stirring, standing for 5-20min, removing slag, repeating the stirring, standing and removing slag process for 1-2 times, pouring the obtained melt into a steel mould preheated to 250-300 ℃ at 750-900 ℃ to obtain large volume fraction Al-TiB 2 Pure phase master alloys, i.e. TiB 2 a/Al composite material.
The invention also discloses application of the cast aluminum-copper alloy in the field of aviation or automobile castings.
Compared with the prior art, the cast aluminum-copper alloy, the preparation method and the application thereof have the following advantages:
1) According to the invention, by optimizing the components of the aluminum-copper alloy and adopting the aluminum ingot with the purity of 99.00-99.77% as the raw material, the high-strength and high-toughness aluminum-copper alloy is prepared, the mechanical property of the aluminum-copper alloy is equivalent to that of ZL205A alloy produced by high-purity aluminum, but the cost of the aluminum-copper alloy is reduced by 40% compared with that of the aluminum-silicon alloy prepared by using the high-purity aluminum ingot, the problem of high cost of the high-mechanical alloy caused by impurity limitation is solved, and the application field of the high-strength and high-toughness aluminum-copper alloy is expanded.
2) The invention adds TiB 2 The particles can be used as nucleation cores to refine the grain size of the aluminum-copper alloy as-cast structure in the solidification process, so as to play a role in fine-grain reinforcement, further be beneficial to maintaining the elongation of the material, and simultaneously be submicron-grade pure-phase TiB 2 The particles can play a role in dispersion strengthening, so that the tensile strength and the yield strength of the material are improved, and the problems of high strength and toughness matching and poor casting performance of the conventional aluminum-copper alloy are solved. The influence of Fe impurities on the mechanical property is weakened, and the problem that the high-mechanical-property aluminum-copper alloy (ZL 205A aluminum alloy) is limited by high production cost of impurity raw materials is solved.
3) The invention optimizes the components of the aluminum-copper alloy, and simultaneously ensures that the aluminum alloy has the characteristics of high strength and toughness, high yield and the like by matching with an accurate heat treatment process, thereby ensuring that the mechanical property of the aluminum alloy is as follows: the tensile strength of the T5 in a heat treatment state is 499MPa, the yield strength is 400MPa, and the elongation is 11 percent; the tensile strength in the T6 heat treatment state is 526MPa, the yield strength is 458MPa, and the elongation is 7%. Compared with the existing ZL205A aluminum alloy, the mechanical property is improved, but the cost is reduced by nearly 40%.
Drawings
FIG. 1 is an as-cast gold phase diagram of a cast aluminum-copper alloy;
FIG. 2 is TiB 2 Distribution of particles in the cast aluminum bronze alloy.
Detailed Description
The invention is further illustrated by the following examples:
the invention provides a cast aluminum-copper alloy, a preparation method thereof and an aluminum-copper alloy for aviation or automobile castings, which are respectively explained in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments of the present invention. In the following embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to related descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
The related national standard ZL205A for aerospace (QJ 3185-2003) in the prior art comprises the following main alloy components: 4.6 to 5.3 percent of Cu, 0.3 to 0.5 percent of Mn, 0.15 to 0.35 percent of Ti, 0.05 to 0.2 percent of Zr, 0.15 to 0.25 percent of Cd, 0.005 to 0.06 percent of B, 0.05 to 0.3 percent of V and less than or equal to 0.15 percent of impurity Fe. Addition of Al is frequently carried out in the casting 5 TiB, alTiC and other grain refiners refine the structure.
The invention provides a cast aluminum-copper alloy which comprises the following components in percentage by mass: cu4.8-5.3 wt%, mn 0.35-0.5 wt%, ti 0.1-0.15 wt%, V0.1-0.15 wt%, zr 0.1-0.15 wt%, cd 0.1-0.2 wt%, B0.05-0.01 wt%, and TiB 2 0.08-0.5 percent of Fe and less than or equal to 0.15 percent of Fe. In some embodiments, the cast aluminum-copper alloy comprises the following components in percentage by mass: cu 5.0-5.3 wt%, mn 0.35-0.5 wt%, ti 0.15-0.2 wt%, V0.1-0.15 wt%, zr 0.15-0.2 wt%, cd0.1-0.15 wt%, B0.05-0.07 wt%, and TiB 2 0.08-0.2 percent of Fe, less than or equal to 0.15 percent of Fe and the balance of Al.
In the embodiment, the aluminum ingot (A00 aluminum) with the purity of 99.00-99.77% is adopted as the raw material by optimizing the alloy components, so that the production cost of the aluminum-copper alloy with high mechanical property is reduced, and the component ranges of main alloy elements Cu, mn, ti, V, zr, B and Cd are optimized. Adding a trace of TiB 2 ，TiB 2 The ceramic particles can be used as nucleation cores to refine the grain size of the as-cast structure of the aluminum alloy in the solidification process, so that the fine-grain strengthening effect is achieved, the elongation of the material is kept, and meanwhile, the submicron TiB 2 The particles can play a role in dispersion strengthening, so that the tensile strength and the yield strength of the material are improved, the problem of strength and toughness matching of the aluminum-copper alloy is solved, and the elongation can be ensured to be more than 5%. In addition, by adding TiB to the alloy composition 2 And the content of the composite material is ensured to reach 0.08-0.5%, the composite material plays a role in refiner and dispersion strengthening, and the composite material is beneficial to improving the strength of the material and the elongation at the same time.In the prior art, al is added 5 TiB、Al 5 TiC and other refiners play a refining role, and Al is added 5 The introduction of B into TiB plays a thinning role, but quantitative TiB cannot be stably formed 2 . In other embodiments, the optimized alloy components are matched with a heat treatment process to obtain the low-cost high-strength and high-toughness aluminum-copper-silicon alloy material, the tensile strength, the yield strength and the elongation of the aluminum-copper-silicon alloy material all reach the aerospace grade 1 standard, but the cost of the aluminum-copper-silicon alloy material is reduced by 40% compared with that of ZL205A aluminum alloy prepared by using a high-purity aluminum ingot.
Correspondingly, the invention also provides a preparation method of the cast aluminum-copper alloy, which comprises the following steps:
s1, obtaining an alloy melt with the following alloy components in percentage by mass: 4.8 to 5.3 percent of Cu, 0.35 to 0.5 percent of Mn, 0.1 to 0.15 percent of Ti, 0.1 to 0.15 percent of V, 0.1 to 0.15 percent of Zr, 0.1 to 0.2 percent of Cd, 0.05 to 0.01 percent of B, 0.08 to 0.5 percent of TiB, less than or equal to 0.15 percent of Fe and the balance of Al, and obtaining an alloy ingot after casting.
In step S1, the aluminum raw material used for smelting is an aluminum ingot with a purity of greater than 99.00%, and the aluminum ingot with the purity may be industrial raw aluminum, and the purity is generally 99.00-99.77%. The aluminum raw material is a primary product in the aluminum electrolysis industry and is directly refined by simple gas in the electrolysis process. The purity of the high-purity aluminum is generally 99.999% -99.9999%, the aluminum raw material is a product obtained by the combined process of electrolytic refining and segregation of industrial raw aluminum, and the production and manufacturing cost of the high-purity aluminum is far higher than that of the industrial raw aluminum used by the invention.
It is further noted that the alloy melt having the above composition obtained in S1 can be obtained by a conventional melting method, for example, a batch melting method or a semi-continuous melting method.
And S2, carrying out solution quenching treatment on the alloy ingot.
Specifically, the aluminum-copper alloy cast ingot is put into a hot air circulation solid melting furnace for solid solution treatment, and is quickly put into water with set temperature for quenching after solid solution treatment.
The solution treatment may be performed by a solution treatment facility other than the hot-air circulation solid-solution furnace. In other embodiments, the solution quenching treatment employs the following process parameters: the solid solution temperature is 530-545 ℃, the solid solution time is 10-18 h, and the quenching temperature is 50-70 ℃. The matching of the solid solution temperature and the solid solution time is favorable for ensuring the redissolution of a solidified precipitated phase, and the reasonable quenching temperature can ensure that the supersaturated solid solution is fixed and not decomposed, prevent the material from cold cracking, prevent the precipitation of a strengthening phase and reduce the mechanical property after quenching aging.
In a specific example, the temperature of solid solution may be any one of 530 ℃, 531 ℃, 535 ℃, 538 ℃, 540 ℃, 541 ℃, 542 ℃, 543 ℃, 544 ℃ or 545 ℃, for example, but may be any other value within the above solid solution temperature range. The solid solution time may be any time of 10h, 11h, 12h, 13h, 14h, 15h, 16h, 17h or 18h, and may be any other value within the above solid solution time range.
And S3, carrying out aging treatment after the step S2, and rapidly cooling to obtain the aluminum-copper alloy. In some embodiments, after the aging process is completed, air cooling is used to cool the aluminum bronze alloy ingot.
Specifically, the aluminum-copper alloy ingot subjected to the solution quenching treatment in the step S2 is placed into a hot air circulation aging furnace for aging treatment. In other embodiments, the aging treatment employs the following process parameters: the aging temperature is 150-170 ℃, and the aging time is 8-14 h; in one embodiment, for example, the temperature of aging may be any of 150 ℃, 155 ℃, 160 ℃, 165 ℃ or 170 ℃, although any other temperature within the above aging temperature range may be used. The aging time may be any of 8h, 9h, 10h, 11h, 12h, 13h, or 14h, but any other time within the above aging time range may be employed.
In other embodiments of the present invention, in order to obtain an aluminum-copper alloy with relatively good elongation, and higher tensile strength and yield strength, the aluminum-copper alloy components designed in the above embodiments are processed by a heat treatment process, wherein the tensile strength is 499MPa, the yield strength is 400MPa, the elongation is 11%, the solution temperature is 535 ℃, the solution time is 18h, the quenching temperature is 70 ℃, the aging temperature is 150 ℃, and the aging time is 8h in a T5 heat treatment state; the tensile strength in the T6 heat treatment state is 526MPa, the yield strength is 458MPa, and the elongation is 7%. The solid solution process comprises the following steps: the solid solution temperature is 535 ℃, the solid solution time is 11h plus 545 ℃, the solid solution time is 4h, the quenching temperature is 70 ℃, the aging temperature is 160 ℃, and the aging time is 12h.
The following preferred process parameters may be specifically employed: in some embodiments of the present invention, in order to obtain an aluminum alloy with higher mechanical properties, the heat treatment process employs the following preferred process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, the quenching temperature is 70 ℃, the aging temperature is 150 ℃, and the aging time is 8h.
In other embodiments of the present invention, in order to obtain an aluminum alloy with higher mechanical properties, the heat treatment process employs the following preferred process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, the quenching temperature is 70 ℃, the aging temperature is 150 ℃, and the aging time is 12h.
In some embodiments of the present invention, to obtain higher mechanical properties of the aluminum alloy, the heat treatment process employs the following preferred process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, the quenching temperature is 70 ℃, the aging temperature is 160 ℃, and the aging time is 8h.
In some embodiments of the present invention, to obtain higher mechanical properties of the aluminum alloy, the heat treatment process employs the following preferred process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, the quenching temperature is 70 ℃, the aging temperature is 170 ℃, and the aging time is 6h.
It should be noted that, in the specific implementation, a person skilled in the art can match the alloy composition of the present invention with the corresponding heat treatment process conditions according to actual needs to obtain the aluminum-copper alloy material with corresponding properties.
In some embodiments of the present invention, obtaining an aluminum bronze alloy melt of designed alloy composition comprises the steps of:
and S101, calculating and batching according to the designed components of the aluminum-copper alloy.
S102, preparing aluminum ingots with the purity of more than 99.00 percent, cu-containing raw materials, mn-containing raw materials, ti-containing raw materials and Ti-containing raw materialsSequentially adding the V raw material and the Zr-containing raw material into a melting furnace, heating to 760-780 ℃ for melting, preserving heat and standing for 50-60 min after all the raw materials are dissolved, and sequentially adding the TiB-containing raw material 2 Dissolving raw materials and raw materials containing Cd and B, standing for 10min-15min, performing component detection on the melt to obtain the mass content of each component of the melt, and adjusting each component of the melt to be qualified to obtain an intermediate melt of the required component. In a specific example, component detection may be performed using spectroscopy. In other embodiments, the Cu-containing feedstock is electrolytic copper or an Al — Cu master alloy; the Mn-containing raw material is electrolytic manganese or Al-Mn intermediate alloy; ti-containing raw material Al-Ti intermediate alloy; v-containing raw material Al-V intermediate alloy; zr-containing raw material Al-Zr intermediate alloy; a Cd-containing raw material Al-Cd intermediate alloy; in the embodiment, the intermediate alloy is used as the raw material as much as possible, so that the melting diffusion time is reduced, and the high-melting-point metal elements can be well diffused and dissolved. By adding TiB 2 Introduction of TiB into/Al composite material 2 ，TiB 2 Extremely stable, so that TiB can be accurately controlled according to the addition amount in the subsequent addition process 2 Amount to match the desired amount of TiB 2 。
In step S102, the melting temperature is controlled not to exceed 760 ℃. When the melting temperature exceeds 770 ℃, the oxidation of the aluminum alloy is serious, the hydrogen absorption and slag inclusion in the melting process are increased, the crystal grains are coarse in the casting solidification process, and the mechanical property of the aluminum-copper alloy is reduced. The standing time is 8-15 minutes, which is beneficial to TiB 2 More uniform dispersion in the aluminum melt and avoidance of TiB 2 Agglomeration and sedimentation phenomena occur, thereby being beneficial to improving the TiB 2 The refining and strengthening effects.
S103, adding a slag removing agent into the intermediate melt, and removing impurities.
It should be noted that the refining process may employ conventional degassing rotary refining. For example, degassing refining is used, inert gases or refining agents being introduced into the intermediate melt. In a specific example, a rotary blowing device is used for introducing argon into the intermediate melt, the rotating speed is 300r/min-700r/min, and the refining time is 10min-20min.
And S104, removing floating materials on the surface of the melt after the treatment, and removing slag to obtain the aluminum-copper alloy melt.
And S105, adjusting components, degassing, refining and standing, then performing spectrum detection on the aluminum-copper alloy melt sample, and adjusting the components to be qualified to obtain the melt.
In other embodiments of the present invention, tiB 2 TiB in/Al composite material 2 20-30% of the total mass percentage of the composition, the _ TiB 2 The particle size diameter of the/Al composite material is 100nm-1.0 mu m. TiB 2 The particles are used as nucleation cores in the solidification process to effectively refine the size of the as-cast crystal grains of the aluminum alloy, play a role in fine grain strengthening, and meanwhile, the submicron TiB with the grain size diameter of 100nm-1.0 mu m 2 The particles can perform the function of dispersion strengthening, and TiB can be seen from figure 2 2 The particles are uniformly distributed in the crystal, so that the structure is effectively refined and the strength is improved.
In some embodiments, the TiB 2 the/Al composite material comprises 1.0-2.5 mass percent of B, the molar ratio of Ti to B is =1/2, and the balance is Al and TiB 2 The phase composition of the/Al composite material comprises alpha-Al and TiB 2 ，TiB 2 Average particle size less than 0.6 [ mu ] m, tiB 2 The particles are relatively uniformly dispersed.
The TiB 2 The preparation method of the/Al composite material comprises the following steps:
step (1) raw material preparation, weighing H 3 BO 3 、TiO 2 Aluminum powder, titanium powder and aluminum ingot, wherein H 3 BO 3 ：TiO 2 : al powder: molar ratio of Ti powder = (3.5-5.2): (0.5-2.1): (3.5-5.7): (0.2-1.5), wherein the molar ratio of Ti/B is =1/2, and the aluminum ingot purity is 99.9%;
step (2) reacting H 3 BO 3 And TiO 2 Uniformly mixing, heating at 200-250 ℃ for 1.5-2 h for two hours, removing water, taking out every 20-40 minutes in the removing process, and stirring the powder to ensure that the powder is dried uniformly and is not easy to agglomerate;
step (3) heating the TiO 2 、H 3 BO 3 The aluminum powder and the titanium powder are uniformly mixed, and the uniformly mixed powder is placed in a die and pressed into a block;
step (4) heating the aluminum ingot to 900-1050 ℃ by using a well-type resistance furnace, pressing a graphite bell jar into the block body obtained in the step (3) after the aluminum ingot is completely melted, taking out the bell jar after the reaction is cremated, and carrying out melt self-propagating direct reaction for 5-8min; after the reaction is completed, press C 2 C l6 Refining, stirring, standing for 5-20min, removing slag, repeating the stirring, standing and removing slag process for 1-2 times, pouring the obtained melt into a steel mould preheated to 250-300 ℃ at 750-900 ℃ to obtain large volume fraction Al-TiB 2 Pure phase master alloys, i.e. TiB 2 a/Al composite material.
The method adopts a melt self-propagating direct synthesis method, utilizes wide raw material sources and has low cost TiO 2 、H 3 BO 3 Develops a pure phase Al-TiB with environment-friendly and clean preparation process and high particle content 2 And (3) intermediate alloy. Solves the problems of difficult preparation, high preparation cost and TiAl existing in the traditional method 3 Residual problem, tiB in master alloy 2 The particle size is small, the distribution is uniform, the particle content is high or the volume fraction is large, the volume fraction can reach 25 percent, and generally the maximum can reach 50 percent; the obtained intermediate alloy is pure phase and only contains alpha-Al and TiB 2 。
In other embodiments, the optimized aluminum-copper alloy components are matched with a precise heat treatment process to obtain the aluminum-copper alloy, and the aluminum-copper alloy is tested by the following steps: the tensile strength under the T5 heat treatment state is 450MPa-500MPa, the yield strength is 350MPa-400MPa, and the elongation is more than 9%; the tensile strength under the T6 heat treatment state is 490MPa-530MPa, the yield strength is 380MPa-460MPa, and the elongation is more than 6%. The existing related aerospace level 1 standard ZL205A is a single-cast test bar in a T6 heat treatment state, the tensile strength is more than or equal to 490MPa, the yield strength is more than or equal to 350MPA, and the elongation is more than or equal to 3%. Compared with the mechanical properties of the existing ZL205A aluminum alloy, the aluminum-copper alloy has the advantages that the tensile strength and the yield strength are improved. However, the prior ZL205A aluminum alloy has higher requirements on the impurity content of the aluminum alloy, and the aluminum ingot is usually 99.99 high-purity aluminum ingot, so that the manufacturing cost is higher.
The cast aluminum-copper alloy can be applied to the field of aerospace, and under the condition that the production cost is greatly reduced, the cast aluminum-copper alloy has excellent mechanical properties and is applied to industries such as automobiles and the like to make up the performance deficiency of aluminum-silicon-aluminum alloy, and meet the increasingly urgent requirements of automobile light weight, especially unsprung weight reduction.
In order to make the above implementation details and operations of the present invention clearly understood by those skilled in the art and to make the progress of the cast aluminum-copper alloy and the preparation method thereof obvious, the technical solution is illustrated by the following examples.
Example 1
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: cu5.09%, mn0.357%, ti 0.173%, V0.148%, zr0.196%, cd0.139%, B0.053%, tiB20.157%, fe less than or equal to 0.15%, and the balance Al.
The preparation method of the cast aluminum-copper alloy comprises the following steps:
s1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material and a B-containing raw material into a smelting furnace, heating to 780 ℃ for melting, preserving heat and standing for 60min after all the raw materials are dissolved and clear, and then sequentially adding a Cd-containing raw material and a TiB-containing raw material 2 the/Al composite material is dissolved and then stands for 10min to obtain an intermediate melt of the required components; and removing impurities from the intermediate melt, and removing slag to obtain the alloy ingot.
S2, putting the alloy ingot into a hot air circulation solid melting furnace for solid solution quenching treatment, wherein the solid solution quenching treatment adopts the following process parameters: the solid solution temperature is 535 ℃, the solid solution time is 18h, and the quenching temperature is 70 ℃.
S3, placing the alloy ingot subjected to the solution quenching treatment in the S2 into a hot air circulation aging furnace for aging treatment, wherein the aging treatment adopts the following process parameters: the aging temperature is 150 ℃, and the aging time is 8h; and cooling to obtain the aluminum-copper alloy.
Example 2
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: 5.13 percent of Cu, 0.36 percent of Mn, 0.153 percent of Ti, 0.158 percent of V, 0.175 percent of Zr, 0.143 percent of Cd, 0.063 percent of B, 0.424 percent of TiB2, less than or equal to 0.15 percent of Fe and the balance of Al.
This example was prepared in the same manner as example 1.
Example 3
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: 4.95 percent of Cu, 0.457 percent of Mn, 0.183 percent of Ti, 0.178 percent of V, 0.173 percent of Zr, 0.14 percent of Cd, 0.07 percent of B, 0.08 percent of TiB2, less than or equal to 0.15 percent of Fe and the balance of Al.
S1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material and a B-containing raw material into a smelting furnace, heating to 780 ℃ for melting, preserving heat and standing for 60min after all the raw materials are dissolved, and then sequentially adding a Cd-containing raw material and a TiB 2 the/Al composite material is dissolved and then stands for 10min to obtain an intermediate melt of the required components; and removing impurities from the intermediate melt, and removing slag to obtain the alloy ingot.
S2, putting the alloy ingot into a hot air circulation solid melting furnace for solid solution quenching treatment, wherein the solid solution quenching treatment adopts the following process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, and the quenching temperature is 70 ℃.
S3, placing the alloy ingot subjected to the solution quenching treatment in the S2 into a hot air circulation aging furnace for aging treatment, wherein the aging treatment adopts the following process parameters: the aging temperature is 150 ℃, and the aging time is 12h; and cooling to obtain the aluminum-copper alloy.
Example 4
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: 4.85 percent of Cu, 0.305 percent of Mn, 0.183 percent of Ti, 0.138 percent of V, 0.163 percent of Zr, 0.127 percent of Cd, 0.094 percent of B, 0.237 percent of TiB2, less than or equal to 0.15 percent of Fe and the balance of Al.
S1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material and a B-containing raw material into a smelting furnace, heating to 780 ℃ for melting, preserving heat and standing for 60min after all the raw materials are dissolved, and then sequentially adding a Cd-containing raw material and a TiB 2 the/Al composite material is dissolved and then stands for 10min to obtain an intermediate melt of the required components; and removing impurities from the intermediate melt, and removing residues to obtain an alloy ingot.
S2, putting the alloy ingot into a hot air circulation solid melting furnace for solid solution quenching treatment, wherein the solid solution quenching treatment adopts the following process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, and the quenching temperature in water is 70 ℃.
S3, placing the alloy ingot subjected to the solution quenching treatment in the S2 into a hot air circulation aging furnace for aging treatment, wherein the aging treatment adopts the following process parameters: the aging temperature is 150 ℃, and the aging time is 12h; and cooling to obtain the aluminum-copper alloy.
Example 5
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: cu5.28 percent, mn0.45 percent, ti0.157 percent, V0.18 percent, zr 0.173 percent, cd0.145 percent, B0.07 percent, tiB20.15 percent, fe less than or equal to 0.15 percent, and the balance of Al.
S1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material and a B-containing raw material into a smelting furnace, heating to 780 ℃ for melting, preserving heat and standing for 60min after all the raw materials are dissolved, and then sequentially adding a Cd-containing raw material and a TiB 2 the/Al composite material is dissolved and then stands for 10min to obtain an intermediate melt of the required components; and removing impurities from the intermediate melt, and removing slag to obtain the alloy ingot.
S2, putting the alloy ingot into a hot air circulation solid melting furnace for solid solution quenching treatment, wherein the solid solution quenching treatment adopts the following process parameters: the solid solution temperature is 535 ℃, the solid solution time is 11h plus the solid solution temperature is 545 ℃, the solid solution time is 4h, and the quenching temperature is 70 ℃.
S3, placing the alloy ingot subjected to the solution quenching treatment in the S2 into a hot air circulation aging furnace for aging treatment, wherein the aging treatment adopts the following process parameters: the aging temperature is 160 ℃, and the aging time is 12h; and cooling to obtain the aluminum-copper alloy.
Example 6
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: cu5.18 percent, mn0.35 percent, ti0.167 percent, V0.173 percent, zr 0.157 percent, cd0.145 percent, B0.06 percent, tiB2 0.25 percent, fe less than or equal to 0.15 percent and the balance of Al.
This example was prepared in the same manner as example 5.
Example 7
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: cu5.08 percent, 0.35 percent of Mn0.157 percent, 0.157 percent of Ti0.157 percent, 0.133 percent of V, 0.156 percent of Zr, 0.135 percent of Cd0.06 percent, 0.12 percent of TiB2, less than or equal to 0.15 percent of Fe, and the balance of Al.
S1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material and a B-containing raw material into a smelting furnace, heating to 780 ℃ for melting, preserving heat and standing for 60min after all the raw materials are dissolved, and then sequentially adding a Cd-containing raw material and a TiB 2 the/Al composite material is dissolved and then stands for 10min to obtain an intermediate melt of the required components; and removing impurities from the intermediate melt, and removing slag to obtain the alloy ingot.
S2, putting the alloy ingot into a hot air circulation solid melting furnace for solid solution quenching treatment, wherein the solid solution quenching treatment adopts the following process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, and the quenching temperature in water is 70 ℃.
S3, placing the alloy ingot subjected to the solution quenching treatment in the S2 into a hot air circulation aging furnace for aging treatment, wherein the aging treatment adopts the following process parameters: the aging temperature is 160 ℃, and the aging time is 8h; and cooling to obtain the aluminum-copper alloy.
Example 8
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: cu4.98 percent, mn0.37 percent, ti0.183 percent, V0.145 percent, zr 0.186 percent, cd0.145 percent, B0.08 percent, tiB2 0.32 percent, fe less than or equal to 0.15 percent and the balance of Al.
S1, adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material and a B-containing raw material into a smelting furnace, heating to 780 ℃ for melting, preserving heat and standing for 60min after all the raw materials are dissolved, and then sequentially adding a Cd-containing raw material and a TiB 2 the/Al composite material is dissolved and then stands for 10min to obtain an intermediate melt of the required components; and removing impurities from the intermediate melt, and removing slag to obtain the alloy ingot.
S2, putting the alloy ingot into a hot air circulation solid melting furnace for solution quenching treatment, wherein the solution quenching treatment adopts the following process parameters: the solid solution temperature is 535 ℃, the solid solution time is 14h, and the quenching temperature in water is 70 ℃.
S3, placing the alloy ingot subjected to the solution quenching treatment in the S2 into a hot air circulation aging furnace for aging treatment, wherein the aging treatment adopts the following process parameters: the aging temperature is 170 ℃, and the aging time is 6h; and cooling to obtain the aluminum-copper alloy.
Example 9
The embodiment provides a cast aluminum-copper alloy, which comprises the following components in percentage by mass: cu5.23 percent, mn0.47 percent, ti0.193 percent, V0.175 percent, zr 0.156 percent, cd0.145 percent, B0.08 percent, tiB2 0.2 percent, fe less than or equal to 0.15 percent and the balance of Al.
This example uses the same heat treatment process as example 7.
Comparative example
Discloses a ZL205A aluminum alloy material which comprises the following components in percentage by mass: cu5.03%, mn0.37%, ti0.153%, V0.155%, zr 0.154%, cd0.12%, B0.04%, fe is less than or equal to 0.15%, and the balance is Al.
Obtaining ZL205A aluminum alloy cast ingot by casting, and adding Al during casting 5 The TiB grain refiner refines the structure.
And carrying out T6 heat treatment on the obtained ZL205A aluminum alloy ingot to obtain the ZL204A aluminum alloy material.
Table 1 is a table comparing the mechanical properties of the cast aluminum-copper alloys prepared in examples 1-9 with those of the ZL205A aluminum alloy of the comparative example after T6 heat treatment:
TABLE 1 comparison chart of mechanical properties
It can be seen from table 1 that the cast aluminum-copper alloys of examples 1-9 exhibit good mechanical properties, both tensile strength and yield strength higher than the ZL205A aluminum alloy grade 1 standard in QJ3185-2003, while the elongation remains above 5%.
As shown in the phase diagram of aluminum-copper alloy of FIG. 1, the results of the cast structure of the cast aluminum-copper alloy of examples 1-9 are shown in FIG. 1, in which TiB is added 2 The particles can effectively refine the as-cast structure of the alloy, and submicron TiB is dispersed and distributed in the crystal interior and the crystal boundary 2 The grains, see fig. 2, act as a refining and dispersion strengthening effect, and correspondingly improve the strength.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The cast aluminum-copper alloy is characterized by comprising the following components in percentage by mass:
the balance being Al.
2. The cast aluminum-copper alloy of claim 1, comprising the following components in mass percent:
the balance being Al.
3. The cast aluminum-copper alloy of claim 1 or 2, wherein the cast aluminum-copper alloy has a tensile strength of 450MPa to 500MPa, a yield strength of 350MPa to 400MPa, and an elongation > 9% in the T5 heat treated state; the tensile strength of the cast aluminum-copper alloy in a T6 heat treatment state is 490MPa to 530MPa, the yield strength is 380MPa to 460MPa, and the elongation is more than 6 percent.
4. A method of producing the cast aluminum-copper alloy according to any one of claims 1 to 3, comprising the steps of:
s1, weighing raw materials according to a weight ratio, and carrying out fusion casting to obtain an intermediate melt; removing impurities from the intermediate melt, and removing slag to obtain an alloy ingot;
s2, carrying out solution quenching treatment on the alloy ingot;
and S3, carrying out aging treatment, and cooling to obtain the aluminum-copper alloy.
5. The method for producing a cast aluminum-copper alloy according to claim 4, wherein S1 comprises the steps of adding an aluminum ingot, a Cu-containing raw material, a Mn-containing raw material, a V-containing raw material, a Zr-containing raw material and a B-containing raw material into a melting furnace, heating and melting the raw materials, keeping the temperature and standing the raw materials after all the raw materials are dissolved, and then sequentially adding a Cd-containing raw material and a TiB-containing raw material into the melting furnace 2 And (3) dissolving the/Al composite material, and standing to obtain an intermediate melt of the required components.
6. The method for preparing the cast aluminum-copper alloy according to claim 4, wherein the solution quenching treatment S2 adopts the following process parameters: the solid solution temperature is 530-545 ℃, the solid solution time is 10-18 h, and the quenching temperature is 50-70 ℃.
7. The method for preparing the cast aluminum-copper alloy according to claim 4, wherein the aging treatment S3 adopts the following process parameters: the aging temperature is 150-170 ℃, and the aging time is 6-14 h.
8. The method of manufacturing a cast aluminum-copper alloy according to claim 5, wherein the Cu-containing raw material is Al-Cu master alloy or pure copper; and/or the presence of a gas in the gas,
the Mn-containing raw material is Al-Mn intermediate alloy and/or pure manganese; and/or the presence of a gas in the gas,
the raw material containing Ti is Al-Ti intermediate alloy and/or pure titanium; and/or the presence of a gas in the gas,
the V-containing raw material is Al-V intermediate alloy and/or pure vanadium; and/or the presence of a gas in the gas,
the Zr-containing raw material is Al-Zr intermediate alloy and/or pure zirconium; and/or the presence of a gas in the gas,
the raw material containing Cd is Al-Cd intermediate alloy and/or pure cadmium; and/or the presence of a gas in the gas,
the raw material containing B is Al-B intermediate alloy.
9. The method of claim 5, wherein the TiB is added to the cast aluminum-copper alloy 2 TiB in/Al composite material 2 The mass percentage of the component (A) is 20-30%; and/or the presence of a gas in the gas,
the TiB 2 The particle size diameter of the/Al composite material is 100nm-1.0 mu m.
10. Use of the cast aluminium-copper alloy according to any one of claims 1 to 3 in the field of aeronautical or automotive castings.
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