CN117127130A - Multistage homogenization treatment method for aluminum alloy and aluminum alloy - Google Patents
Multistage homogenization treatment method for aluminum alloy and aluminum alloy Download PDFInfo
- Publication number
- CN117127130A CN117127130A CN202311406964.1A CN202311406964A CN117127130A CN 117127130 A CN117127130 A CN 117127130A CN 202311406964 A CN202311406964 A CN 202311406964A CN 117127130 A CN117127130 A CN 117127130A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- alloy
- temperature
- homogenization treatment
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 134
- 238000000265 homogenisation Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011777 magnesium Substances 0.000 claims description 40
- 239000011701 zinc Substances 0.000 claims description 34
- 239000010949 copper Substances 0.000 claims description 28
- 229910052706 scandium Inorganic materials 0.000 claims description 17
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims description 9
- 230000005496 eutectics Effects 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000002105 nanoparticle Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 30
- 238000002360 preparation method Methods 0.000 abstract description 17
- 239000000956 alloy Substances 0.000 description 144
- 229910045601 alloy Inorganic materials 0.000 description 142
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 60
- 238000001125 extrusion Methods 0.000 description 35
- 229910052786 argon Inorganic materials 0.000 description 30
- 238000007872 degassing Methods 0.000 description 30
- 239000000243 solution Substances 0.000 description 23
- 238000005266 casting Methods 0.000 description 22
- 238000007670 refining Methods 0.000 description 20
- 238000003756 stirring Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 18
- 230000032683 aging Effects 0.000 description 12
- 238000001192 hot extrusion Methods 0.000 description 11
- 238000010791 quenching Methods 0.000 description 11
- 230000000171 quenching effect Effects 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000011888 foil Substances 0.000 description 10
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 150000002739 metals Chemical class 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 238000011534 incubation Methods 0.000 description 4
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 4
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910018569 Al—Zn—Mg—Cu Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- C22F1/053—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 zinc as the next major constituent
-
- 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
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
Abstract
The application provides a multistage homogenization treatment method of an aluminum alloy and the aluminum alloy. The multistage homogenization treatment method of the aluminum alloy comprises the following steps of S1, heating the aluminum alloy to a temperature ranging from 280 ℃ to 330 ℃ and preserving heat for 5 to 15 hours; step S2, heating the aluminum alloy to the temperature ranging from 380 ℃ to 420 ℃ and preserving heat for 0.5h to 10h; step S3, heating the aluminum alloy to 470-475 ℃ and preserving heat for 10-40 hours; step S4, heating the aluminum alloy to the temperature ranging from 476 ℃ to 480 ℃ and preserving heat for 10 to 40 hours; and step S5, cooling the aluminum alloy to room temperature. The multistage homogenization treatment method of the aluminum alloy and the aluminum alloy solve the problem of difficult preparation of large-size cast ingots, and can effectively eliminate the low-melting-point primary phase T phase in the aluminum cast ingots, avoid overburning, thereby improving the comprehensive performance of aluminum alloy extruded materials.
Description
Technical Field
The application relates to the field of aluminum alloy heat treatment, in particular to a multistage homogenization treatment method of an aluminum alloy and the aluminum alloy.
Background
The Al-Zn-Mg-Cu aluminum alloy is a heat-treatable reinforced ultrahigh-strength deformed aluminum alloy, and is widely applied to the fields of aerospace, rail transit, nuclear industry, weapons and the like due to high specific strength, good toughness and corrosion resistance. With the increasing urgent demands of the future equipment for ultra-high specific strength and low cost, the demands of ultra-high strength aluminum alloy materials with excellent comprehensive properties are increasing. Through alloy component design and preparation process adjustment, development of aluminum alloy materials with higher strength grade is necessary.
At present, 800 MPa-grade aluminum alloy manufactured by a semi-continuous casting technology and a powder metallurgy technology is produced in China, but the industrial application is difficult due to higher cost. The preparation of 800MPa aluminum alloy by semi-continuous casting technology has the problems of difficult preparation of large-specification cast ingot, serious segregation of cast ingot components caused by ultrahigh alloying, difficult dissolution of coarse second phases in the alloy, poor matching of the toughness of the alloy and the like.
Thus, there remains a need for a method of treating Al-Zn-Mg-Cu based aluminum alloys to provide good dissolution of coarse second phases in the alloy and to reduce unbalanced eutectic phases in the alloy.
Disclosure of Invention
The application mainly aims to provide a multistage homogenization treatment method of an aluminum alloy and the aluminum alloy, and aims to solve the problems that in the prior art, a large-size cast ingot is difficult to prepare, the cast ingot is seriously segregated due to ultrahigh alloying, the second phase in the alloy is difficult to dissolve back, and the strength and toughness of the alloy are poor in matching.
In order to achieve the above object, according to one aspect of the present application, there is provided a multi-stage homogenization treatment method of an aluminum alloy, including: step S1, heating the aluminum alloy to a temperature ranging from 280 ℃ to 330 ℃ and preserving heat for 5 to 15 hours; step S2, heating the aluminum alloy to the temperature ranging from 380 ℃ to 420 ℃ and preserving heat for 0.5h to 10h; step S3, heating the aluminum alloy to 470-475 ℃ and preserving heat for 10-40 hours; step S4, heating the aluminum alloy to the temperature ranging from 476 ℃ to 480 ℃ and preserving heat for 10 to 40 hours; and step S5, cooling the aluminum alloy to room temperature.
Further, in the above-described multistage homogenization treatment method, the temperature rising rate in step S1 is in the range of 30 ℃/h to 80 ℃/h.
Further, in the above-described multistage homogenization treatment method, the temperature rising rate in step S2 is in the range of 20 ℃/h to 50 ℃/h.
Further, in the above-described multistage homogenization treatment method, the temperature rising rate in step S3 is in the range of 10 ℃/h to 30 ℃/h.
Further, in the above-described multistage homogenization treatment method, the temperature rising rate in step S4 is in the range of 5 ℃/h to 10 ℃/h.
Further, in the above-described multistage homogenization treatment method, the aluminum alloy contains the elements zinc, magnesium, copper, zirconium, scandium, and aluminum.
Further, in the above-described multistage homogenization treatment method, the aluminum alloy contains 9.5 to 12.0% zinc, 2.5 to 3.5% magnesium, 1.0 to 2.5% copper, 0.08 to 0.15% zirconium, 0 to 0.3% scandium, and the balance aluminum by weight.
Further, in the above-described multistage homogenization treatment method, the aluminum alloy further contains 0% to 0.1% silicon, and/or 0% to 0.1% iron by weight.
Further, in the above-described multistage homogenization treatment method, the aluminum alloy after the multistage homogenization treatment contains Al 3 (Sc, zr) nanoparticles.
Further, in the above-described multi-stage homogenization treatment method, the content of the unbalanced eutectic phase in the aluminum alloy after the multi-stage homogenization treatment is in a range of 0.9 area% to 1.1 area%.
According to another aspect of the present application, there is provided an aluminum alloy treated by the above-described multi-stage homogenization treatment method.
The multistage homogenization treatment method of the aluminum alloy and the aluminum alloy solve the problem of difficult preparation of large-size cast ingots, and can effectively eliminate the low-melting-point primary phase T phase in the aluminum cast ingots, avoid overburning, thereby improving the comprehensive performance of aluminum alloy extruded materials.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic illustration of a multi-stage homogenization treatment process of the present application;
FIG. 2 is an SEM structure diagram of an alloy ingot according to example 1 of the present application.
FIG. 3 is an SEM photograph of an alloy of example 1 of the present application after homogenization.
FIG. 4 is a SEM photograph of the structure after homogenization of the aluminum alloy prepared in comparative example 3 of the present application.
FIG. 5 is a SEM photograph of the structure after homogenization of the aluminum alloy prepared in comparative example 5.
FIG. 6 shows the structure of Al in the homogenized aluminum alloy prepared in example 1 of the present application 3 (Zr, sc) particle TEM morphology.
FIG. 7 is a drawing showing the structure of Al in the homogenized aluminum alloy of comparative example 1 3 (Zr, sc) particle TEM morphology.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As described in the background art, in the prior art, the method for processing or casting aluminum alloy has the problems of difficult preparation of large-size cast ingot, severe segregation of cast ingot components caused by ultrahigh alloying, difficult dissolution of coarse second phases in the alloy, poor matching of toughness of the alloy, and the like. In view of the problems in the prior art, an exemplary embodiment of the present application provides a multi-stage homogenization treatment method of an aluminum alloy, including the steps of: heating the aluminum alloy to 280-330 ℃ and preserving heat for 5-15 h; heating the aluminum alloy to the temperature of 380-420 ℃ and preserving the heat for 0.5-10 hours; heating the aluminum alloy to 470-475 ℃ and preserving heat for 10-40 h, heating the aluminum alloy to 476-480 ℃ and preserving heat for 10-40 h; and cooling the aluminum alloy to room temperature.
Referring to FIG. 1 of the drawings, in the method of the application, firstly, an aluminum alloy ingot is heated from room temperature to a temperature range of 280-330 ℃ at a speed of 30-80 ℃/h and is kept for 5-15 h; secondly, raising the temperature of the aluminum alloy to 380-420 ℃ from the temperature range of 280-330 ℃ at the speed of 20-50 ℃/h, and preserving the temperature for 0.5-10 h; thirdly, heating the aluminum alloy to a temperature range of 470-475 ℃ from a temperature range of 380-420 ℃ at a speed of 10-30 ℃/h, and preserving heat for 10-40 h; and fourthly, heating the aluminum alloy to 476-480 ℃ from the temperature range of 470-475 ℃ at a speed of 5-10 ℃/h, preserving heat for 10-40 h, then removing the aluminum alloy from the treatment furnace, and cooling to room temperature in the air.
In the method, the first step is to reach the set temperature at a faster heating rate (30-80 ℃/h); the heating rate of the second step (20-50 ℃/h) and the heating rate of the third step (10-30 ℃/h) can be relatively slow; and the fourth step should reach the set temperature at a slower heating rate (5-10 ℃/h) to prevent the furnace temperature from being too high.
In the method, the aluminum alloy is heated from room temperature to a temperature range of 280-330 ℃ and is kept for 5-15 h, so that trace elements scandium (Sc) and aluminum (Al) in the aluminum alloy form Al 3 Core of Sc nanoparticle. In the second step the alloy is moved from 2After the temperature range of 80-330 ℃ is increased to the temperature range of 380-420 ℃ and the temperature is kept for 0.5-10 hours, the trace zirconium (Zr) element in the aluminum alloy is prepared by using Al 3 Sc as core to form Al 3 (Sc, zr) nanoparticles. In the third step, the aluminum alloy is heated from the temperature range of 380-420 ℃ to the temperature range of 470-475 ℃ and is kept for 10-40 hours, and in the process of casting, a low-melting-point unbalanced eutectic phase (T phase) existing in the aluminum alloy is decomposed, and most of the T phase is dissolved back into a main phase. And fourthly, in the process of heating the aluminum alloy to 476-480 ℃ from the temperature range between 470-475 ℃ and preserving heat for 10-40 hours, the T phase in the aluminum alloy is further dissolved back into the aluminum matrix in the temperature range relatively close to the third step, so that the volume percentage of the T phase in the aluminum alloy, which possibly causes the reduction of the mechanical property of a final finished product, is reduced.
The multistage homogenization treatment method is suitable for the aluminum alloy with high alloying components, and the low-temperature stage of the method mainly promotes the trace elements Sc and Zr in the aluminum alloy to form Al 3 (Sc, zr) nano-dispersed phase particles capable of suppressing occurrence of recrystallization during extrusion deformation and solid solution. Meanwhile, the method can effectively eliminate the low-melting-point primary phase T phase in the aluminum cast ingot, avoid overburning, and finally improve the comprehensive performance of the aluminum alloy extruded material. The aluminium alloy treated by the method of the application is capable of achieving tensile strengths of 820MPa to up to 834MPa and can achieve elongations of up to 9.0% and yield strengths of 780MPa to up to 795 MPa.
In some embodiments of the application, the soak temperature in the first step may be within the following temperature ranges: 280 ℃ to 330 ℃, 290 ℃ to 320 ℃, 300 ℃ to 310 ℃, 280 ℃ to 320 ℃, 280 ℃ to 310 ℃, 280 ℃ to 300 ℃, 290 ℃ to 330 ℃, 300 ℃ to 330 ℃, and 310 ℃ to 330 ℃; the incubation time is in the following range: 5h to 15h, 6h to 14h, 7h to 13h, 8h to 12h, 9h to 11h, 5h to 14h, 5h to 13h, 5h to 12h, 5h to 11h, 5h to 10h, 6h to 15h, 7h to 15h, 8h to 15h, 9h to 15h, or 10h to 15h.
In some embodiments of the application, the soak temperature in the second step may be within the following temperature ranges: 380 ℃ to 420 ℃, 390 ℃ to 410 ℃, 390 ℃ to 420 ℃, 400 ℃ to 420 ℃, 410 ℃ to 420 ℃, 380 ℃ to 410 ℃, 380 ℃ to 400 ℃, or 380 ℃ to 390 ℃; the incubation time is in the following range: 0.5 to 10h, 1 to 9h, 2 to 8h, 3 to 7h, 4 to 6h, 0.5 to 9h, 0.5 to 8h, 0.5 to 7h, 0.5 to 6h, 0.5 to 5h, 1 to 10h, 2 to 10h, 3 to 10h, 4 to 10h, or 5 to 10h.
In some embodiments of the application, the soak temperature in the third step may be within the following temperature ranges: 470 to 475 ℃, 471 to 474 ℃, 472 to 473 ℃, 471 to 475 ℃, 472 to 475 ℃, 473 to 475 ℃, 474 to 475 ℃, 470 to 474 ℃, 470 to 473 ℃, 470 to 472 ℃, or 470 to 471 ℃; the incubation time is in the following range: 10h to 40h, 15h to 40h, 20h to 40h, 30h to 40h, 35h to 40h, 10h to 30h, 11h to 29h, 12h to 28h, 13h to 27h, 14h to 26h, 15h to 25h, 166h to 24h, 17h to 23h, 18h to 22h, 19h to 21h, 12h to 30h, 14h to 30h, 16h to 30h, 18h to 30h, 20h to 30h, 22h to 30h, 24h to 30h, 26h to 30h, 10h to 28h, 10h to 26h, 10h to 24h, 10h to 22h, 10h to 20h, 10h to 18h, 10h to 16h, or 10h to 14h.
In some embodiments of the application, the soak temperature in the fourth step may be within the following temperature ranges: 476 to 480 ℃, 477 to 479 ℃, 477 to 480 ℃, 478 to 480 ℃, 479 to 480 ℃, 476 to 479 ℃, 476 to 478 ℃, or 476 to 477 ℃; the incubation time is in the following range: 10h to 40h, 15h to 40h, 10h to 30h, 15h to 30h, 10h to 20h, 15h to 20h, 20h to 40h, 21h to 39h, 22h to 38h, 23h to 37h, 24h to 36h, 25h to 35h, 26h to 34h, 27h to 33h, 28h to 32h, 29h to 31h, 22h to 40h, 24h to 40h, 26h to 40h, 28h to 40h, 30h to 40h, 32h to 40h, 34h to 40h, 36h to 40h, 20h to 38h, 20h to 36h, 20h to 34h, 20h to 32h, 20h to 30h, 20h to 28h, 20h to 24h, or 20h to 24h.
In a further embodiment of the present application, a process for preparing an aluminum alloy ingot is performed prior to performing the multi-stage homogenization treatment method of the present application. In the preparation process, the materials are proportioned according to the chemical components and weight percentage requirements of the aluminum alloy, and all the components are mixed and smelted to obtain a semicontinuous ingot with the size of phi 178mm, for example.
Furthermore, after the multi-stage homogenization treatment method of the present application is performed, the following steps may be further included:
peeling the aluminum alloy cast ingot subjected to the multistage homogenization treatment by using a hot extrusion method, wherein the extrusion heating temperature is 380-430 ℃, the extrusion ratio is more than 10, and the size of the final extrusion material is not less than phi 30mm;
carrying out solution treatment on the extruded material, wherein the solution treatment is to heat the extruded material to a temperature range between 470 ℃ and 480 ℃ and keep the temperature for 4 to 8 hours, and then carrying out quenching treatment by using water to cool the extruded material;
prestretching the extrusion material subjected to solution treatment by 1.0% -3.0%, and then performing aging treatment. The aging treatment is carried out under the process conditions that the extruded material is heated to a temperature range of between 110 and 120 ℃ and is kept for 20 to 30 hours, and then annealing and cooling are carried out in air.
In some embodiments of the application, the aluminum alloy subjected to the multi-stage homogenization treatment is an aluminum alloy comprising the elements zinc (Zn), magnesium (Mg), zirconium (Zr), scandium (Sc), and aluminum (Al). The presence of zinc (Zn) and scandium (Sc) in the aluminum alloy enables the formation of dispersed Al in the aluminum alloy 3 (Sc, zr) nanoparticles. The nano particles can pin grain boundaries, inhibit crystallization regeneration and play a role of dispersion strengthening, so that the strength of the finally formed aluminum alloy is improved. In further embodiments, the aluminum alloy used in the present application may include the elements zinc (Zn), magnesium (Mg), zirconium (Zr), copper (Cu), scandium (Sc), and aluminum (Al).
In a preferred mode of the application, the aluminum alloy used may contain 9.5 to 12.0% zinc (Zn), 2.5 to 3.5% magnesium (Mg), 1.0 to 2.5% copper (Cu), 0.08 to 0.15% zirconium (Zr), 0 to 0.3% scandium (Sc) and the balance aluminum (Al) by weight. In further preferred embodiments, the aluminum alloy may further comprise 0% to 0.1% silicon (Si), and/or 0% to 0.1% iron (Fe). In the aluminum alloy of the present application containing the above-described weight percent of the element, the content of the unbalanced eutectic phase in the aluminum alloy after the multi-stage homogenization treatment of the present application is in the range of 0.9 to 1.1 area%.
The application is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the application as claimed.
Example 1
The preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 10.5% of Zn, 2.8% of Mg, 2.0% of Cu, 0.10% of Zr, 0.10% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 280 ℃ from room temperature at a speed of 30 ℃/h, and the temperature is kept for 15h; step two, raising the temperature of the alloy from 280 ℃ to 380 ℃ at a speed of 20 ℃/h, and then preserving the temperature for 10 hours; thirdly, heating the alloy from 380 ℃ to 470 ℃ at a speed of 30 ℃/h, and preserving heat for 30h; the fourth step was to raise the alloy from 470 ℃ to 476 ℃ at a rate of 10 ℃/h and hold it for 30h, followed by removal from the furnace and cooling in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. And then hot extrusion is carried out, the extrusion heating temperature is 410 ℃, the extrusion is carried out to obtain bars with phi 40mm, and the extrusion ratio is 16.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.0%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 110 ℃. Followed by cooling in air.
Example 2:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 11.2% of Zn, 3.0% of Mg, 1.5% of Cu, 0.12% of Zr, 0.14% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Multistage homogenization process: homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 300 ℃ from room temperature at a speed of 50 ℃/h, and the temperature is kept for 10 hours; step two, raising the temperature of the alloy from 300 ℃ to 400 ℃ at a speed of 40 ℃/h, and then preserving the temperature for 5 hours; step three, heating from 400 ℃ to 473 ℃ at a speed of 20 ℃/h, and preserving heat for 20h; the fourth step was to raise the alloy from 473 ℃ to 477 ℃ at a rate of 8 ℃/h and hold it for 40h, followed by removal from the furnace and cooling in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. And then hot extrusion is carried out, the extrusion heating temperature is 420 ℃, and the extrusion is carried out to obtain bars with phi 30mm, and the extrusion ratio is 28.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 1.5%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 120 ℃. Followed by cooling in air.
Example 3:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 10.8% of Zn, 3.2% of Mg, 1.8% of Cu, 0.11% of Zr0.16% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 330 ℃ from room temperature at the speed of 80 ℃/h, and the temperature is kept for 5 hours; step two, raising the temperature of the alloy from 330 ℃ to 420 ℃ at a speed of 50 ℃/h, and then preserving the temperature for 2 hours; thirdly, heating the alloy from 420 ℃ to 475 ℃ at a speed of 10 ℃/h, and preserving heat for 40h; the fourth step was to raise the alloy from 475 ℃ to 480 ℃ at a rate of 5 ℃/h and hold it for 10h, followed by removal from the furnace and cooling in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. Then hot extrusion is carried out, the extrusion heating temperature is 400 ℃, the extrusion is carried out to obtain bars with phi 50mm, and the extrusion ratio is 10.2.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.5%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 115 ℃. Followed by cooling in air.
Example 4:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 9.80% of Zn, 2.75% of Mg, 1.60% of Cu, 0.10% of Zr0.12% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 290 ℃ from room temperature at the speed of 60 ℃/h, and the temperature is kept for 12 hours; step two, raising the temperature of the alloy from 290 ℃ to 390 ℃ at a speed of 30 ℃/h, and then preserving the temperature for 8h; thirdly, heating the alloy from 390 ℃ to 474 ℃ at a speed of 15 ℃/h, and preserving heat for 24h; the fourth step was to raise the alloy from 474 ℃ to 478 ℃ at a rate of 5 ℃/h and hold it for 24 hours, followed by removal from the furnace and cooling in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. Then hot extrusion is carried out, the extrusion heating temperature is 400 ℃, the extrusion is carried out to obtain bars with phi 50mm, and the extrusion ratio is 10.2.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.5%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 115 ℃. Followed by cooling in air.
Example 5:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 11.00% of Zn, 2.90% of Mg, 1.30% of Cu, 0.10% of Zr, 0.10% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 310 ℃ from room temperature at a speed of 70 ℃/h, and the temperature is kept for 8 hours; step two, raising the temperature of the alloy from 310 ℃ to 410 ℃ at a speed of 40 ℃/h, and then preserving the temperature for 6h; thirdly, heating the alloy from 410 ℃ to 472 ℃ at a speed of 20 ℃/h, and preserving heat for 30h; the fourth step was to raise the alloy from 472 c to 477 c at a rate of 5 c/h and hold it for 20h, followed by removal from the furnace and cooling in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. Then hot extrusion is carried out, the extrusion heating temperature is 400 ℃, the extrusion is carried out to obtain bars with phi 50mm, and the extrusion ratio is 10.2.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.5%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 115 ℃. Followed by cooling in air.
Comparative example 1:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 9.7% of Zn, 2.65% of Mg, 2.1% of Cu, 0.09% of Zr, 0.11% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 400 ℃ from room temperature at the speed of 80 ℃/h and then is kept for 10 hours; secondly, heating the alloy from 400 ℃ to 470 ℃ at a speed of 30 ℃/h, and preserving heat for 30h; thirdly, heating the alloy to 476 ℃ at a speed of 10 ℃/h, preserving heat for 12 hours, and then removing the alloy from a heating furnace and cooling the alloy in air;
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. Then hot extrusion is carried out, the extrusion heating temperature is 400 ℃, the extrusion is carried out to obtain bars with phi 40mm, and the extrusion ratio is 16.
(8) The extruded aluminum alloy was subjected to solution treatment at a temperature of 473 c for 8 hours, and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.0%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 110 ℃. Followed by cooling in air.
Comparative example 2:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 10.5% of Zn, 2.80% of Mg, 1.8% of Cu, 0.12% of Zr, 0.15% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 300 ℃ from room temperature at a speed of 60 ℃/h and then is kept for 10 hours; step two, heating the alloy from 300 ℃ to 473 ℃ at a speed of 50 ℃/h, and preserving heat for 24h; and thirdly, heating the alloy from 473 ℃ to 477 ℃ and preserving heat for 24 hours, and then removing the alloy from the heating furnace and cooling the alloy in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. And then hot extrusion is carried out, the extrusion heating temperature is 420 ℃, and the extrusion is carried out to obtain bars with phi 40mm, and the extrusion ratio is 16.
(8) The extruded aluminum alloy was subjected to solution treatment at 473 c for 4 hours, and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.0%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 120 ℃. Followed by cooling in air.
Comparative example 3:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 11.5% of Zn, 3.3% of Mg, 1.5% of Cu, 0.11% of Zr, 0.10% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated from room temperature to 290 ℃ at the speed of 60 ℃/h and then is kept for 10 hours; step two, heating the alloy from 290 ℃ to 410 ℃ at a speed of 20 ℃/h, and preserving heat for 4 hours; the third step was to raise the temperature from 410℃to 470℃at a rate of 30℃per hour, keep the temperature for 30 hours, and then remove the furnace and cool it in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. And then hot extrusion is carried out, the extrusion heating temperature is 420 ℃, and the extrusion is carried out to obtain bars with phi 40mm, and the extrusion ratio is 16.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.0%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 120 ℃. Followed by cooling in air.
Comparative example 4:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 11.2% of Zn, 3.1% of Mg, 1.5% of Cu, 0.11% of Zr, 0.10% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated to 310 ℃ from room temperature at a speed of 40 ℃/h and then is kept for 6 hours; secondly, heating the alloy from 310 ℃ to 380 ℃ at a speed of 20 ℃/h, and preserving heat for 8h; thirdly, heating the alloy from 380 ℃ to 465 ℃ at a speed of 30 ℃/h, and preserving heat for 20h; the fourth step is to heat the alloy from 465 ℃ to 473 ℃ for 8 hours, then remove the furnace and cool it in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. And then hot extrusion is carried out, the extrusion heating temperature is 420 ℃, and the extrusion is carried out to obtain bars with phi 40mm, and the extrusion ratio is 16.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.0%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 120 ℃. Followed by cooling in air.
Comparative example 5:
the preparation process of the alloy comprises the following steps:
(1) The alloy ratio is as follows: 10.5% of Zn, 2.9% of Mg, 1.5% of Cu, 0.11% of Zr, 0.10% of Sc and the balance of Al. The materials are proportioned according to the weight percentage, and 99.99 percent of high-purity Al ingot, pure Zn ingot, pure Mg ingot, al-Cu intermediate alloy, al-Sc intermediate alloy and Al-10Zr intermediate alloy are adopted.
(2) Firstly heating a furnace to 860+/-10 ℃, then placing pure Al into a medium-frequency crucible furnace for melting, and then adding Al-10Zr intermediate alloy, al-2Sc intermediate alloy, al-50Cu intermediate alloy and pure Zn in sequence after the furnace temperature is 790+/-10 ℃.
(3) After all metals are melted, stirring the materials uniformly, adding pure argon for degassing and refining; and (3) when the temperature is reduced to 760+/-10 ℃, adding pure Mg ingots wrapped by aluminum foil paper, standing for 20 minutes, adding pure argon again for degassing, and slightly stirring for refining.
(4) After standing for 15 minutes, the mixture was introduced into a degassing furnace and degassed with pure argon for 10 minutes.
(5) And after fully standing, casting is started, the furnace mouth temperature is maintained within the range of 710+/-10 ℃, the casting speed is 70 mm/min, and round ingots with the diameter phi 178mm are cast.
(6) Homogenizing the cast ingot, wherein the cast ingot adopts a multi-stage homogenization process, and firstly, the alloy cast ingot is heated from room temperature to 280 ℃ at a speed of 60 ℃/h and then is kept for 10 hours; secondly, heating the alloy from 280 ℃ to 400 ℃ at a speed of 20 ℃/h, and preserving heat for 5 hours; the third step was to raise the temperature from 410℃to 482℃at a rate of 30℃per hour, keep the temperature for 20 hours, and then remove the furnace and cool it in air.
(7) And peeling the homogenized cast ingot, and turning the ingot into a round ingot with the diameter of 160 mm. And then hot extrusion is carried out, the extrusion heating temperature is 420 ℃, and the extrusion is carried out to obtain bars with phi 40mm, and the extrusion ratio is 16.
(8) The extruded aluminum alloy was solution-treated at 475 c for 4 hours and then quenched with water.
(9) Prestretching the aluminum alloy subjected to solution treatment and quenching treatment, wherein an electronic universal tester is used for prestretching the novel alloy sample, and the prestretching amount is 2.0%; and carrying out peak aging treatment on the pre-stretched aluminum alloy, and preserving heat for 24 hours at the temperature of 120 ℃. Followed by cooling in air.
Performance testing
Determination of the proportion of residual T phase
The aluminum alloys prepared in examples 1 to 5 and comparative examples 1 to 5 were sampled, and second phase (residual T phase) distribution was observed by using a scanning electron microscope, and each sample was photographed 10 times, and then the area of the residual second phase in the tissue was counted by using Image-ProPlus Image analysis software to obtain the area ratio of the residual T phase. The experimental results are shown in table 1 below.
Mechanical Strength test
The tensile strength, yield strength and elongation were measured by using the aluminum alloys prepared in examples 1 to 5 and comparative examples 1 to 5 described above using an Shimadzu 100KN electronic universal tester, and the test standard was national standard GB/T228.1-2021. The experimental results are shown in table 1 below.
Scanning electron microscope
The aluminum alloy prepared in the above example 1 was cast and homogenized to form samples, and the two samples were mechanically polished, and observed for second phase morphology using JEOL scanning electron microscope JSM-IT 300. The results are shown in fig. 2 and 3.
The aluminum alloys prepared in comparative examples 3 and 5 were homogenized to form samples, and the two samples were mechanically polished, and observed for second phase morphology using JEOL scanning electron microscope JSM-IT 300. The results are shown in fig. 4 and 5.
Transmission electron microscope
The aluminum alloys prepared in the above example 1 and comparative example 1 were homogenized to form samples, and the two samples were respectively prepared into transmissive film samples, and the nano-scale precipitated phases were characterized by using a JEOL field emission transmission electron microscope JEM-F200. The results are shown in fig. 6 and 7.
Experimental results
TABLE 1 test results of aluminum alloys of examples 1-5 and comparative examples 1-5
As can be seen from table 1 above, the aluminum alloys prepared in examples 1 to 5 of the present application each have a content of the unbalanced eutectic phase in the range of 0.9 area% to 1.1 area%, while the comparative examples show a content outside the range of the present application. In addition, examples 1 to 5 of the present application also exhibited excellent mechanical properties, in which tensile strength could reach 834MPa, yield strength could reach 795MPa and elongation of 10.0% could be achieved. While individual comparative examples may exhibit an increase in individual properties, improvements in tensile strength, yield strength, and elongation cannot be achieved simultaneously.
Referring to fig. 4 and 5 of the drawings, the homogenization temperature employed in comparative example 3 was lower (outside the scope of the present application), resulting in insufficient T-phase miscibility and, in turn, somewhat lower alloy strength (tensile strength of only 820 MPa), and lower elongation (only 5.5%). In comparative example 5, the homogenization temperature was too high, so that remelting eutectic was largely present in the structure of the alloy, and overburning development was caused, resulting in sufficient eutectic phase dissolution in the structure, but the elongation of the alloy was reduced (only 5.0%).
See FIG. 6 of the drawingsAnd 7, al in the aluminum alloy treated by the multi-stage homogenization treatment method of the application 3 The aluminum alloy prepared in comparative example was higher in Al than that in example 1 of the present application, and the (Sc, zr) particles were precipitated uniformly and at a higher density 3 The (Sc, zr) particles are unevenly precipitated and the density thereof is too small.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (11)
1. A multi-stage homogenization treatment method of an aluminum alloy, comprising:
step S1, heating the aluminum alloy to a temperature ranging from 280 ℃ to 330 ℃ and preserving heat for 5 to 15 hours;
step S2, heating the aluminum alloy to the temperature ranging from 380 ℃ to 420 ℃ and preserving heat for 0.5h to 10h;
step S3, heating the aluminum alloy to 470-475 ℃ and preserving heat for 10-40 h;
step S4, heating the aluminum alloy to the temperature ranging from 476 ℃ to 480 ℃ and preserving heat for 10 to 40 hours; and
and S5, cooling the aluminum alloy to room temperature.
2. The multistage homogenization treatment method according to claim 1, characterized in that the temperature rising rate in the step S1 is in the range of 30 ℃/h to 80 ℃/h.
3. The multistage homogenization treatment method according to claim 1, characterized in that the temperature rising rate in the step S2 is in the range of 20 ℃/h to 50 ℃/h.
4. The multistage homogenization treatment method according to claim 1, characterized in that the temperature rising rate in the step S3 is in the range of 10 ℃/h to 30 ℃/h.
5. The multistage homogenization treatment method according to claim 1, characterized in that the temperature rising rate in the step S4 is in the range of 5 ℃/h to 10 ℃/h.
6. The multistage homogenization treatment process of any one of claims 1-4, wherein the aluminum alloy comprises the elements zinc, magnesium, copper, zirconium, scandium, and aluminum.
7. The multi-stage homogenization treatment method of claim 6, wherein the aluminum alloy includes 9.5% to 12.0% zinc, 2.5% to 3.5% magnesium, 1.0% to 2.5% copper, 0.08% to 0.15% zirconium, 0% to 0.3% scandium, and the balance aluminum by weight.
8. The multi-stage homogenization treatment method of claim 7, wherein the aluminum alloy further includes 0% to 0.1% silicon, and/or 0% to 0.1% iron by weight.
9. The multistage homogenization treatment method according to any one of claims 1 to 4, characterized in that the aluminum alloy after multistage homogenization treatment contains Al 3 (Sc, zr) nanoparticles.
10. The multistage homogenization treatment method according to any one of claims 1 to 4, characterized in that the content of the unbalanced eutectic phase in the aluminum alloy after multistage homogenization treatment is in the range of 0.9 area% to 1.1 area%.
11. An aluminum alloy treated by the multi-stage homogenization treatment method of any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311406964.1A CN117127130B (en) | 2023-10-27 | 2023-10-27 | Multistage homogenization treatment method for aluminum alloy and aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311406964.1A CN117127130B (en) | 2023-10-27 | 2023-10-27 | Multistage homogenization treatment method for aluminum alloy and aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117127130A true CN117127130A (en) | 2023-11-28 |
| CN117127130B CN117127130B (en) | 2024-02-20 |
Family
ID=88853120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311406964.1A Active CN117127130B (en) | 2023-10-27 | 2023-10-27 | Multistage homogenization treatment method for aluminum alloy and aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117127130B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796976A (en) * | 2012-08-22 | 2012-11-28 | 北京有色金属研究总院 | Staged homogenization heat treatment method for improving microstructure and performances of Zr-containing 7xxx aluminum alloy |
| CN106399776A (en) * | 2016-11-11 | 2017-02-15 | 佛山科学技术学院 | 800MPa-level ultrahigh-strength aluminum alloy and preparing method thereof |
| CN106607538A (en) * | 2016-12-23 | 2017-05-03 | 东北轻合金有限责任公司 | A manufacture method for an AL-Zn-Mg-Cu aluminum alloy disc die forging for a helicopter |
| CN110396629A (en) * | 2019-08-16 | 2019-11-01 | 中国航发北京航空材料研究院 | A kind of 800MPa grades of aluminum alloy extrusion section bar and preparation method thereof |
| CN110846599A (en) * | 2019-11-14 | 2020-02-28 | 中国航发北京航空材料研究院 | Heat treatment method for improving corrosion performance of 800 MPa-grade aluminum alloy |
| CN112226636A (en) * | 2020-09-08 | 2021-01-15 | 烟台南山学院 | Preparation method of high-strength corrosion-resistant Al-Zn-Mg-Cu-Zr-Ce alloy plate |
| WO2021121343A1 (en) * | 2019-12-17 | 2021-06-24 | 中铝材料应用研究院有限公司 | 7xxx series aluminum alloy or plate, manufacturing method therefor, processing method therefor, and application thereof |
| US20220112588A1 (en) * | 2019-01-18 | 2022-04-14 | Aleris Rolled Products Germany Gmbh | 7xxx-series aluminium alloy product |
| CN116555645A (en) * | 2023-02-10 | 2023-08-08 | 上海交通大学 | Aluminum alloy and homogenization treatment process and preparation method thereof |
| CN116875863A (en) * | 2023-07-11 | 2023-10-13 | 内蒙古工业大学 | Novel super-strong aluminum alloy material and preparation and processing method thereof |
-
2023
- 2023-10-27 CN CN202311406964.1A patent/CN117127130B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796976A (en) * | 2012-08-22 | 2012-11-28 | 北京有色金属研究总院 | Staged homogenization heat treatment method for improving microstructure and performances of Zr-containing 7xxx aluminum alloy |
| CN106399776A (en) * | 2016-11-11 | 2017-02-15 | 佛山科学技术学院 | 800MPa-level ultrahigh-strength aluminum alloy and preparing method thereof |
| CN106607538A (en) * | 2016-12-23 | 2017-05-03 | 东北轻合金有限责任公司 | A manufacture method for an AL-Zn-Mg-Cu aluminum alloy disc die forging for a helicopter |
| US20220112588A1 (en) * | 2019-01-18 | 2022-04-14 | Aleris Rolled Products Germany Gmbh | 7xxx-series aluminium alloy product |
| CN110396629A (en) * | 2019-08-16 | 2019-11-01 | 中国航发北京航空材料研究院 | A kind of 800MPa grades of aluminum alloy extrusion section bar and preparation method thereof |
| CN110846599A (en) * | 2019-11-14 | 2020-02-28 | 中国航发北京航空材料研究院 | Heat treatment method for improving corrosion performance of 800 MPa-grade aluminum alloy |
| WO2021121343A1 (en) * | 2019-12-17 | 2021-06-24 | 中铝材料应用研究院有限公司 | 7xxx series aluminum alloy or plate, manufacturing method therefor, processing method therefor, and application thereof |
| CN112226636A (en) * | 2020-09-08 | 2021-01-15 | 烟台南山学院 | Preparation method of high-strength corrosion-resistant Al-Zn-Mg-Cu-Zr-Ce alloy plate |
| CN116555645A (en) * | 2023-02-10 | 2023-08-08 | 上海交通大学 | Aluminum alloy and homogenization treatment process and preparation method thereof |
| CN116875863A (en) * | 2023-07-11 | 2023-10-13 | 内蒙古工业大学 | Novel super-strong aluminum alloy material and preparation and processing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117127130B (en) | 2024-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2770531C (en) | Multi-element heat-resistant aluminum alloy material with high strength and preparation method thereof | |
| Shi et al. | Effects of Sc addition on the microstructure and mechanical properties of cast Al-3Li-1.5 Cu-0.15 Zr alloy | |
| CN108642336B (en) | Extrusion casting aluminum alloy material and preparation method thereof | |
| Mandal et al. | Influence of micro-alloying with silver on microstructure and mechanical properties of Al-Cu alloy | |
| Liao et al. | Dispersoid particles precipitated during the solutionizing course of Al-12 wt% Si-4 wt% Cu-1.2 wt% Mn alloy and their influence on high temperature strength | |
| WO2011035652A1 (en) | High-strength heat-proof aluminum alloy material containing lithium and rare earth and producing method thereof | |
| CN111197132A (en) | Non-heat treatment type high-strength die-casting aluminum alloy and preparation method thereof | |
| Zhang et al. | Effects of Ce addition on microstructure and mechanical properties of Mg-6Zn-1Mn alloy | |
| CN108193096B (en) | High-strength high-toughness hypoeutectic aluminum-silicon casting alloy and preparation method thereof | |
| WO2011023060A1 (en) | High-strength heat-proof aluminum alloy material and producing method thereof | |
| CN108330360B (en) | high-Zn-content high-strength-toughness extrusion deformation aluminum-lithium alloy and preparation method thereof | |
| CN107201472B (en) | Sand casting rare earth magnesium alloy and preparation method thereof | |
| CN112626401B (en) | 2XXX series aluminum alloy and preparation method thereof | |
| Wu et al. | Refined microstructure and improved mechanical properties of high-ratio extruded AZ91− xSn magnesium alloy | |
| WO2011035650A1 (en) | Nickel-rare earth co-doped high-strength heat-proof aluminum alloy material and producing method thereof | |
| WO2011035653A1 (en) | High-strength heat-proof aluminum alloy material containing cobalt and rare earth and producing method thereof | |
| CN111607728A (en) | Low-cost wrought magnesium alloy reinforced by light rare earth elements Ce and Sm and preparation method thereof | |
| CN114231800A (en) | High-performance low-carbon aluminum alloy and preparation method thereof | |
| CN113755732B (en) | Mg-Nd-Mn ternary heat-resistant magnesium alloy and preparation method thereof | |
| US20200354818A1 (en) | High Strength Microalloyed Magnesium Alloy | |
| CN117127130B (en) | Multistage homogenization treatment method for aluminum alloy and aluminum alloy | |
| Chen et al. | Effect of Mn addition on microstructure and mechanical properties of cast Al–2Li–2Cu–0.8 Mg–0.4 Zn–0.2 Zr alloy | |
| CN114703409B (en) | High-strength corrosion-resistant aluminum alloy and casting method thereof | |
| Huang et al. | Effects of trace Cr on as-cast microstructure and microstructural evolution of semi-solid isothermal heat treatment ZC61 magnesium alloy | |
| CN117127071A (en) | Aluminum alloy material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |