CN111893356A - Preparation process of high-strength rare earth aluminum alloy - Google Patents
Preparation process of high-strength rare earth aluminum alloy Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 55
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000000137 annealing Methods 0.000 claims abstract description 17
- 238000005098 hot rolling Methods 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- 239000006104 solid solution Substances 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- 238000005275 alloying Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 4
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000243 solution Substances 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052749 magnesium Inorganic materials 0.000 abstract description 3
- 239000010703 silicon Substances 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 description 8
- 238000011161 development Methods 0.000 description 6
- 238000005728 strengthening Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 125000004429 atom Chemical group 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- -1 rare earth compounds Chemical class 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a preparation process of a high-strength rare earth aluminum alloy, which is characterized by comprising the following steps of: the main elements for alloying comprise the following components in percentage by mass: 0.7-0.9% of magnesium, 0.4-0.6% of silicon, 0.2-0.3% of scandium, 0.15-0.2% of zirconium and the balance of aluminum, and the method comprises the following specific steps: 1) the aluminum alloy is prepared according to the mass percentage, and the prepared pure aluminum and the prepared materials are cast into an alloy ingot; 2) annealing the prepared alloy ingot, heating the alloy ingot to 560 ℃, preserving the heat for 48 hours, and then cooling the alloy ingot to room temperature; 3) carrying out hot rolling on the annealed alloy ingot at 500 ℃ with the deformation degree of 30% to obtain a required aluminum alloy plate; 4) carrying out solid solution treatment on the hot-rolled aluminum plate, wherein the solid solution temperature is 585 ℃, and the heat preservation time is 1.5 h; 5) and finally, carrying out liquid nitrogen temperature control rolling on the aluminum plate in the solid solution state. The yield strength of the alloy after treatment is more than 360MPa, the tensile strength is more than 385MPa, and the elongation is more than 10%.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy, and particularly relates to a preparation process of a high-strength rare earth aluminum alloy.
Background
With the increasing environmental pollution and resource consumption, people are more and more aware of the importance of energy conservation and emission reduction on future development. Especially in the automobile industry, huge energy is consumed every year, and as the end of 2017, about 2.17 hundred million automobiles are shared in China, and the automobiles are the second largest automobile keeping quantity countries in the world at present. However, the huge number of automobiles will bring about huge energy consumption and large amount of pollutant emission, which will aggravate the increasingly serious environmental pollution problem. The analysis data shows that the fuel consumption of the automobile can be reduced by 6-8% and the emission can be reduced by 4% when the automobile mass is reduced by 10%. In the automobile industry, in addition to the development of new energy, the problem of light weight of automobiles has become an important obstacle to the development of the automobile industry. The light weight of the automobile requires automobile manufacturers to reduce the quality of the whole automobile to the maximum extent under the requirement of ensuring the use purpose and the driving safety of the automobile, and because the lighter the automobile is and the less the gasoline is used under the same condition, the less the generated tail gas is, the energy saving and emission reduction effects are realized. At present, besides the optimization of the structure, the selection of a proper material is also an important development direction, and in widely used materials, the aluminum alloy meets the use requirements under different conditions after forming different series of alloys due to the advantages of huge content and small density, and the aluminum alloy gradually replaces steel materials and is also more and more widely applied to automobiles.
Therefore, the development of a novel aluminum alloy material with high strength, high toughness, high temperature resistance, good welding performance and other comprehensive properties becomes the focus of current research. From the view point of modern metal materials, the improvement of the strength of the aluminum alloy metal material generally comprises two ways of reducing the defects in the alloy as much as possible or refining grains by adding hetero atoms (alloying) or plastic deformation and the like. A large number of experimental researches show that Sc is the most effective microalloying element at present, and the addition of Sc into the aluminum alloy can obviously improve the structure and the performance of the aluminum alloy. In the aspect of organization structure, the addition of a trace amount of Sc can obviously refine grains and inhibit recrystallization, and in the aspect of performance, the strength, corrosion resistance, high temperature and welding performance of the alloy are obviously improved until the neutron irradiation damage resistance can be enhanced. At present, Sc as a microalloying additive element for preparing novel high-strength, high-toughness, corrosion-resistant and weldable novel blunderbuss-containing aluminum alloy becomes a hot point of research in the international material community.
With the wide use of aluminum alloys, aluminum alloys adapted to various use conditions are continuously available, and currently, the commonly used aluminum alloys are divided into nine grades according to the difference of the added components in the aluminum alloys. However, the hardness and strength of the aluminum alloy widely used at present are limited, which severely limits the range of application of the aluminum alloy.
In order to improve the performance of the aluminum alloy material, the aluminum alloy material is widely applied to the field of structural materials, and the improvement of the performance of the aluminum alloy in all aspects becomes an important development direction in the future. Research at home and abroad finds that the strengthening mode which is suitable for the aluminum alloy at present mainly comprises 1, change of the components of the material; 2. adopting a plastic deformation process; 3. suitable heat treatment processes, and the like. Depending on the manner, the purpose of the operation is also very different.
After the traditional heat treatment strengthening aluminum alloy is subjected to solution treatment, main strengthening phase elements can be dissolved in a matrix to form a supersaturated solid solution, so that the lattice distortion of the matrix is caused. When the material in a solid solution state is subjected to plastic deformation, the dislocation motion can be effectively hindered by lattice distortion in the matrix, and the performance is improved to the maximum extent.
Therefore, it is necessary to invent a preparation process of alloy to solve the above problems.
Disclosure of Invention
The invention aims to provide a preparation process of a high-strength rare earth aluminum alloy, which solves the problems in the background technology by improving the components of the aluminum alloy and optimizing a heat treatment process.
The strengthening mechanism of the invention is as follows:
the Sc and Zr elements generally added to the aluminum alloy may be present in the following three forms. First, some of the Sc atoms dissolve into the Al matrix; second, a part of Sc atoms is primary Al3Sc or Al3(Sc, Zr) which may be formed during solidification, annealing, thermomechanical processing; third, in the presence of a certain amount of Cu atoms, Sc atoms form particles (W phase) rich in Cu and Sc. Wherein Al is3The (Sc, Zr) phase can play a role in refining crystal grains, can be combined with impurity elements to form rare earth compounds, and eliminates the harmful effect of the impurity elements.
As is clear from FIG. 2, the XRD analysis pattern after heating for 1.5 hours revealed that the presence of Mg was not observed in any of the comparison results of the peaks2Si phase and Al3The presence of the (Sc, Zr) phase indicates that the primary strengthening phase present in the matrix has now been converted to a supersaturated solid solution. The main strengthening phase elements are dissolved in the Al matrix to form phases or clusters to cause the matrix to generate lattice distortion, so that a foundation is laid for the precipitation of a second phase in subsequent processing, and meanwhile, when the material in a solid solution state is subjected to plastic deformation, the lattice distortion in the matrix can effectively hinder dislocation motion, and the performance is improved to the greatest extent.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a high-strength rare earth aluminum alloy is characterized by comprising the following steps: the main elements for alloying are composed as follows in mass percent. 0.7 to 0.9 percent of magnesium (Mg), 0.4 to 0.6 percent of silicon (Si), 0.2 to 0.3 percent of scandium (Sc), 0.15 to 0.2 percent of zirconium (Zr) and the balance of Al.
Preferably, the method comprises the following steps:
1) casting: placing the prepared aluminum alloy raw material into a vacuum smelting furnace for smelting, wherein the casting process comprises the following steps: melting an aluminum block at high temperature of 700 ℃ in a vacuum melting furnace, adding other raw materials according to the mass ratio after the aluminum block is melted at high temperature, heating the temperature of the vacuum melting furnace to 780 ℃, and melting at 780 ℃ at the heating rate of 20 ℃/min; pouring the smelted alloy material into an aluminum alloy ingot, slowly reducing the heating temperature to room temperature, and preparing to obtain an aluminum alloy ingot, wherein the cooling rate is 35 ℃/min;
2) annealing treatment: annealing the aluminum alloy ingot prepared in the step 1, wherein the annealing temperature is 550-570 ℃, preserving heat for 48 hours, and then cooling to room temperature in air;
3) hot rolling: and (3) placing the alloy ingot after annealing treatment in a rolling mill for hot rolling, wherein the deformation of the hot rolling is 30%, and the material and the roller are subjected to heat preservation for 1h at 500-520 ℃ before the hot rolling. During hot rolling, rolling is started along the length direction RD (shown in figure 1), plates are all subjected to one-time heating forming, annealing is not performed in the rolling process, and the plates need to be flattened while being hot after rolling is finished to obtain plates;
4) solution treatment: carrying out solution treatment on the alloy plate after hot rolling, wherein the solution treatment temperature is 580-600 ℃, the heat preservation time is 1.5h, and the alloy plate after solution treatment is quenched by using quenching liquid;
5) and (3) liquid nitrogen temperature control rolling: and (3) performing liquid nitrogen temperature-controlled rolling on the alloy in the solid solution state, placing the plate in liquid nitrogen for 40-50 min for the first time, reducing the temperature to-50 ℃, and then placing the plate back in the liquid nitrogen for 10-15 min before rolling each time, so that the plate obtains 80% of deformation finally.
The invention has the technical effects and advantages that:
1. according to the invention, the components, contents and production processing technology of the traditional and prior aluminum alloy are further improved, so that the internal crystal grain structure of the finished aluminum alloy material is optimized, the mechanical processing performance and the heat treatment performance of the aluminum alloy material are improved, the yield strength of the processed alloy is more than 360MPa, the tensile strength is more than 385MPa and the elongation is more than 10%. The service life of the aluminum alloy material is prolonged, the application field of the aluminum alloy material is greatly widened, and the aluminum alloy material is suitable for popularization and application;
2. the invention reduces the application of noble metals such as chromium, nickel and the like and refractory metals in the preparation process of the aluminum alloy material, reduces the cost and the production energy consumption, and improves the economic benefit.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
FIG. 1 shows different rolling directions of the alloy of the present invention.
FIG. 2 is an XRD analysis chart of the alloy of the present invention after heating for 1.5 h.
FIG. 3 shows the mechanical properties of the alloy of the present invention after temperature controlled rolling with liquid nitrogen.
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 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.
Example one
The invention aims to provide a preparation process of a high-strength rare earth aluminum alloy, which is characterized by comprising the following steps of: the main elements for alloying are composed as follows in mass percent. 0.7 to 0.9 percent of magnesium (Mg), 0.4 to 0.6 percent of silicon (Si), 0.2 to 0.3 percent of scandium (Sc), 0.15 to 0.2 percent of zirconium (Zr), and the balance of Al, and the method comprises the following specific steps:
casting A: according to the designed components of the alloy, an alloy ingot with the mass of 2kg is smelted, all materials are cleaned by adopting NaOH solution in order to avoid the influence of oxides and impurities on the surface of the materials on the quality of the alloy, and then the materials are dried to remove the contained water. Placing the prepared aluminum alloy raw material into a vacuum smelting furnace for smelting, wherein the casting process comprises the following steps: melting an aluminum block at high temperature of 700 ℃ in a vacuum melting furnace, adding other raw materials according to the mass ratio after the aluminum block is melted at high temperature, heating the temperature of the vacuum melting furnace to 780 ℃, and melting at 780 ℃ at the heating rate of 20 ℃/min; pouring the smelted alloy material into an aluminum alloy ingot, slowly reducing the heating temperature to room temperature, and preparing to obtain an aluminum alloy ingot, wherein the cooling rate is 35 ℃/min;
b, annealing treatment: b, placing the aluminum alloy ingot prepared in the step A into a muffle furnace for annealing treatment, wherein the annealing temperature is 560 ℃, preserving heat for 48 hours, and then cooling along with the furnace;
c, hot rolling: after the annealing treatment, hot rolling was carried out with a deformation of 30%, a flat surface was obtained before hot rolling and the material was held at 500 ℃ for 1 h. During hot rolling, the plate is rolled along the length direction RD (figure 1), the plate is heated and formed at one time, annealing is not carried out in the middle, and the plate needs to be flattened when the plate is hot after rolling is finished.
D, solution treatment: carrying out solid solution treatment on the hot-rolled plate, heating to 585 ℃, and then quenching by using quenching liquid;
e, liquid nitrogen temperature control rolling: and (3) performing liquid nitrogen temperature-controlled rolling on the alloy in the solid solution state, placing the alloy in liquid nitrogen for 40-50 min before the first rolling to reduce the temperature to-50 ℃, then placing the alloy back into the liquid nitrogen for 10-15 min before each rolling, wherein the reduction amount of each rolling is 5%, and finally enabling the plate to obtain 80% of deformation to obtain a finished product.
The yield strength, tensile strength and elongation of the alloy of the aluminum alloy were measured to be 365MPa, 393MPa and 10.2% respectively by example 1.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. A preparation process of a high-strength rare earth aluminum alloy is characterized by comprising the following steps: the main elements for alloying are composed as follows in mass percent. Mg: 0.7% -0.9%, Si: 0.4% -0.6%, Sc: 0.2-0.3%, Zr: 0.15 to 0.2 percent of Al, and the balance of Al. .
2. The preparation process of the high-strength rare earth aluminum alloy according to claim 1, characterized in that: rare earth elements of scandium and zirconium are used for alloying, and the ratio of Sc atoms to Zr atoms is as follows: 1.4-2.1: 1.
3. the preparation process of the high-strength rare earth aluminum alloy according to claim 1, which is characterized by comprising the following steps:
A. casting: placing the prepared aluminum alloy raw material into a vacuum smelting furnace for smelting, wherein the casting process comprises the following steps: melting an aluminum block at high temperature of 700 ℃ in a vacuum melting furnace, adding other raw materials according to the mass ratio after the aluminum block is melted at high temperature, heating the temperature of the vacuum melting furnace to 780 ℃, and melting at 780 ℃ at the heating rate of 20 ℃/min; pouring the smelted alloy material into an aluminum alloy ingot, slowly reducing the heating temperature to room temperature, and preparing to obtain an aluminum alloy ingot, wherein the cooling rate is 35 ℃/min;
B. annealing treatment: b, placing the aluminum alloy ingot prepared in the step A into a muffle furnace for annealing treatment, wherein the annealing temperature is 550-570 ℃, preserving heat for 48 hours, and then air-cooling to room temperature;
C. hot rolling: and (3) placing the alloy ingot after annealing treatment in a rolling mill for hot rolling, wherein the deformation of the hot rolling is 30%, and the material and the roller are subjected to heat preservation for 1 hour at 500-520 ℃ before the hot rolling. During hot rolling, rolling is started along the length direction RD (shown in figure 1), plates are all subjected to one-time heating forming, annealing is not performed in the rolling process, and the plates need to be flattened while being hot after rolling is finished to obtain plates;
D. solution treatment: carrying out solution treatment on the alloy plate after hot rolling, and quenching by using quenching liquid after solution treatment;
E. and (3) liquid nitrogen temperature control rolling: and (4) performing liquid nitrogen temperature control rolling on the alloy in the solid solution state to obtain a finished product.
4. The process for preparing a high-strength rare earth aluminum alloy as claimed in claim 3, wherein the solution treatment temperature in the step D is 580-600 ℃ and the solution time is 1.5 hours.
5. The preparation process of the high-strength rare earth aluminum alloy according to claim 3, wherein in the step F, the liquid nitrogen temperature-controlled rolling needs to place the plate in the liquid nitrogen for 40-50 min for the first time to reduce the temperature to-50 ℃, and then the plate needs to be placed back in the liquid nitrogen for 10-15 min before rolling each time, so that the plate can obtain 80% of deformation finally.
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| CN114086040A (en) * | 2021-08-20 | 2022-02-25 | 中国航发北京航空材料研究院 | Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof |
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| 王振 等: "控温变形对 Al-Mg-Si-Sc-Zr 合金时效及微观组织的影响", 《材料热处理学报》 * |
| 罗志勇 等: "室温及液氮控温对轧制态 Al-Sc合金力学性能及织构的影响", 《金属热处理》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086040A (en) * | 2021-08-20 | 2022-02-25 | 中国航发北京航空材料研究院 | Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof |
| CN114086040B (en) * | 2021-08-20 | 2022-06-28 | 中国航发北京航空材料研究院 | Aluminum-magnesium-silicon-scandium-zirconium alloy and preparation method thereof |
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