CN108441792B - Aluminum alloy and heat treatment method thereof - Google Patents
Aluminum alloy and heat treatment method thereof Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 124
- 238000010438 heat treatment Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010791 quenching Methods 0.000 claims abstract description 55
- 230000000171 quenching effect Effects 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 238000000137 annealing Methods 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000005496 tempering Methods 0.000 claims abstract description 10
- 238000010622 cold drawing Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 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
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
- C22C49/06—Aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
-
- 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
- C22F1/04—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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 8-10% of metal fiber, 5.5-7.2% of Mg5.0-2.5% of Zn, 0.8-1.8% of Cu, 0.08-0.18% of Sc, 0.08-0.18% of Zr, 0.12-0.22% of Y, 0.02-0.07% of Si, 0.02-0.07% of Mn, 0.01-0.03% of Er, 0.01-0.03% of Ce, less than or equal to 0.15% of impurity and the balance of Al; the heat treatment step comprises: s1, performing high-temperature heat treatment on the aluminum alloy at 500-600 ℃, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the aluminum alloy after the high-temperature treatment; the content of the PAG polymer in the PAG quenching liquid is 15-60 wt%, the temperature of the PAG quenching liquid is 40-80 ℃, and the stirring speed of the PAG quenching liquid is 100-200 r/s; s2, performing cold deformation treatment on the aluminum alloy subjected to the high-temperature treatment to obtain the aluminum alloy subjected to cold deformation; s3, tempering the aluminum alloy after cold deformation for 1-2 hours at 300-400 ℃; s4, annealing treatment is carried out, the annealing treatment temperature is 100-160 ℃, the annealing treatment time is 6-8 hours, the strength of the aluminum alloy is improved, and the aluminum alloy prepared by the heat treatment method is also included in the invention.
Description
Technical Field
The invention relates to the technical field of aluminum alloy preparation, in particular to an aluminum alloy and a heat treatment method thereof.
Background
Aluminum alloys are the most widely used class of non-ferrous structural materials in industry and have found a number of applications in the aerospace, automotive, mechanical manufacturing, marine and chemical industries. How to improve the performance of the aluminum alloy, especially the strength of the aluminum alloy, has become a problem that industry research and development personnel pay attention to.
Metal fibers are a new industrial material developed in recent years and an important field of modern science. The metal fiber is prepared by a set of special processes of metal wire composite assembly, multiple bundling drawing, annealing, solution treatment and the like, wherein each strand comprises thousands or tens of thousands of metal fibers. The metal fiber has very large surface area, so that the metal fiber has extraordinary performance in the aspects of internal structure, magnetism, heat resistance, melting point and the like. The diameter of the metal fiber can reach 1-2 microns, the elongation is more than 1%, and the fiber strength can reach 1200-1800MPa and even exceeds the tensile strength of the material. The composite material formed by taking the metal fiber as the base material is widely developed and utilized in the industries of electronics, chemical engineering, machinery, military, textile, food, medicine and the like, and the wide application prospect is developed.
The addition of the above metal fibers to an aluminum alloy improves the strength of the aluminum alloy, but the present investigators have found that the strength of an aluminum alloy containing metal fibers can be further improved.
Disclosure of Invention
The invention provides an aluminum alloy and a heat treatment method thereof, aiming at solving the technical problem of improving the strength of the aluminum alloy containing metal fibers.
The technical problem of the invention is solved by the following technical scheme:
the invention provides a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 8-10% of metal fiber, 5.5-7.2% of Mg5.0-2.5% of Zn, 0.8-1.8% of Cu, 0.08-0.18% of Sc, 0.08-0.18% of Zr, 0.12-0.22% of Y, 0.02-0.07% of Si, 0.02-0.07% of Mn, 0.01-0.03% of Er, 0.01-0.03% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 500-600 ℃, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the high-temperature treated aluminum alloy; the content of the PAG polymer in the PAG quenching liquid is 15-60 wt%, the temperature of the PAG quenching liquid is 40-80 ℃, and the stirring speed of the PAG quenching liquid is 100-200 r/s;
s2, performing cold deformation treatment on the aluminum alloy subjected to the high-temperature treatment to obtain the aluminum alloy subjected to cold deformation;
s3, tempering the aluminum alloy after cold deformation for 1-2 hours at 300-400 ℃;
and S4, carrying out annealing treatment at the temperature of 100-160 ℃ for 6-8 h.
Preferably, in step S1, the high-temperature heat treatment time is 3-4 h.
Preferably, the cold deformation process comprises cold drawing or cold rolling.
Preferably, the cold deformation amount of the aluminum alloy subjected to the cold deformation treatment is 5-15%.
Further, in step S1, the content of PAG polymer in the PAG quenching liquid is 25-45 wt%, the temperature of the PAG quenching liquid is 50-70 ℃, and the stirring speed of the PAG quenching liquid is 130-160 r/S.
Preferably, the annealing treatment temperature is 120-150 ℃ and the time is 7-7.5 h.
Preferably, the aluminum alloy is an extrusion cast aluminum alloy article.
Preferably, the aluminum alloy comprises the following components in percentage by mass: 8% of metal fiber, 6.2% of Mg6.0%, 1.0% of ZnCu, 1% of Sc, 0.12% of Zr, 0.13% of Y, 0.04% of Si, 0.07% of Mn, 0.02% of Er, 0.02% of Ce0.02%, less than or equal to 0.15% of impurity and the balance of Al.
Further, the metal fibers comprise stainless steel fibers and/or carbon steel fibers.
The invention also provides an aluminum alloy prepared by adopting the heat treatment method of any one of the aluminum alloys.
Compared with the prior art, the invention has the advantages that: the aluminum alloy comprises a plurality of elements and metal fibers, the elements are not uniformly distributed in the aluminum alloy substrate, after high-temperature heat treatment, the elements are dispersed in the aluminum alloy substrate to improve the distribution uniformity, PAG quenching liquid is adopted for quenching, PAG polymer can be tightly adsorbed on the surface of the aluminum alloy at high temperature to form a heat insulation layer, so that the cooling rate of the surface of the aluminum alloy is reduced, the PAG polymer film is gradually dissolved along with the cooling of the aluminum alloy and becomes uniform aqueous solution, so that the uniform quenching cooling effect is obtained, the quenching residual stress of the aluminum alloy plate is reduced, the cracking of the aluminum alloy is prevented, then the aluminum alloy is subjected to cold deformation treatment, the residual stress on the aluminum alloy is uniformly distributed, rapid nucleation is performed in the subsequent tempering treatment, annealing can prevent the formed nuclei from rapidly growing up, so that a second phase is uniformly separated out, and the strength of the aluminum, the tensile strength of the aluminum alloy treated by the method is obviously improved to 735MPa, and the strength of the product obtained according to the design scheme of the invention is well improved.
Drawings
FIG. 1 is a flow chart of a casting process for an aluminum alloy in an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to figure 1 in conjunction with a preferred embodiment.
Example 1
The aluminum alloy in this example is an aluminum alloy product obtained by extrusion casting.
The embodiment provides a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 8% of carbon steel fiber, 6.2% of Mg6.0%, 1.0% of ZnCu, 1% of Sc, 0.12% of Zr, 0.13% of Y, 0.16% of Si, 0.04% of Mn, 0.07% of Er, 0.02% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 500 ℃ for 3h, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the aluminum alloy after the high-temperature treatment; the content of PAG polymer in the PAG quenching liquid is 15 wt%, the temperature of the PAG quenching liquid is 75 ℃, and the stirring speed of the PAG quenching liquid is 130 r/s;
s2, performing cold drawing treatment on the aluminum alloy subjected to the high-temperature treatment to obtain the aluminum alloy subjected to cold drawing; wherein the cold deformation of the aluminum alloy is 8%.
S3, tempering the aluminum alloy after cold drawing for 2 hours at 300 ℃;
and S4, then carrying out annealing treatment, wherein the temperature of the annealing treatment is 120 ℃, and the time is 6 h.
The embodiment also comprises the aluminum alloy prepared by the heat treatment method.
Example 2
The aluminum alloy in this example is an aluminum alloy product obtained by extrusion casting.
The embodiment provides a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 8% of carbon steel fiber, 6.2% of Mg6.0%, 1.0% of ZnCu, 1% of Sc, 0.12% of Zr, 0.13% of Y, 0.16% of Si, 0.04% of Mn, 0.07% of Er, 0.02% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 600 ℃ for 3.5h, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the high-temperature treated aluminum alloy; the content of PAG polymer in the PAG quenching liquid is 25 wt%, the temperature of the PAG quenching liquid is 60 ℃, and the stirring speed of the PAG quenching liquid is 130 r/s;
s2, performing cold drawing treatment on the aluminum alloy subjected to the high-temperature treatment to obtain the aluminum alloy subjected to cold drawing; wherein the cold deformation of the aluminum alloy is 10%.
S3, tempering the aluminum alloy after cold drawing for 2 hours at 400 ℃;
and S4, then carrying out annealing treatment, wherein the temperature of the annealing treatment is 150 ℃, and the time is 7 h.
The embodiment also comprises the aluminum alloy prepared by the heat treatment method.
Example 3
The aluminum alloy in this example is an aluminum alloy product obtained by extrusion casting.
The embodiment provides a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 9% of stainless steel fiber, 7.2% of Mg7.5% of Zn1.5% of Cu 1.5%, 0.15% of Sc, 0.18% of Zr, 0.18% of Y, 0.06% of Si, 0.06% of Mn, 0.01% of Er, 0.01% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 550 ℃ for 4h, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the aluminum alloy after the high-temperature treatment; the content of PAG polymer in the PAG quenching liquid is 45 wt%, the temperature of the PAG quenching liquid is 70 ℃, and the stirring speed of the PAG quenching liquid is 130 r/s;
s2, performing cold drawing treatment on the aluminum alloy subjected to the high-temperature treatment to obtain the aluminum alloy subjected to cold drawing; wherein the cold deformation of the aluminum alloy is 15%.
S3, tempering the aluminum alloy after cold drawing for 1.5h at 350 ℃;
and S4, then carrying out annealing treatment, wherein the temperature of the annealing treatment is 160 ℃, and the time is 8 h.
The embodiment also comprises the aluminum alloy prepared by the heat treatment method.
Example 4
The aluminum alloy in this example is an aluminum alloy product obtained by extrusion casting.
The embodiment provides a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 9% of stainless steel fiber, 7.2% of Mg7.5% of Zn1.5% of Cu 1.5%, 0.15% of Sc, 0.18% of Zr, 0.18% of Y, 0.06% of Si, 0.06% of Mn, 0.01% of Er, 0.01% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 600 ℃ for 3h, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the aluminum alloy after the high-temperature treatment; the content of PAG polymer in the PAG quenching liquid is 60 wt%, the temperature of the PAG quenching liquid is 50 ℃, and the stirring speed of the PAG quenching liquid is 160 r/s;
s2, performing cold drawing treatment on the aluminum alloy subjected to the high-temperature treatment to obtain the aluminum alloy subjected to cold drawing; wherein the cold deformation of the aluminum alloy is 10%.
S3, tempering the aluminum alloy after cold drawing for 2 hours at 350 ℃;
and S4, then carrying out annealing treatment, wherein the temperature of the annealing treatment is 150 ℃, and the time is 7.5 h.
The embodiment also comprises the aluminum alloy prepared by the heat treatment method.
Example 5
The aluminum alloy in this example is an aluminum alloy product obtained by extrusion casting.
The embodiment provides a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 10% of stainless steel fiber, 6.8% of Mg6.5%, 2.5% of ZnCu 1.8%, 0.08% of Sc, 0.18% of Zr, 0.12% of Y, 0.04% of Si, 0.07% of Mn, 0.03% of Er, 0.01% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 600 ℃ for 4h, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the aluminum alloy after the high-temperature treatment; the content of PAG polymer in the PAG quenching liquid is 15 wt%, the temperature of the PAG quenching liquid is 60 ℃, and the stirring speed of the PAG quenching liquid is 200 r/s;
s2, performing cold rolling treatment on the aluminum alloy subjected to the high-temperature treatment to obtain a cold-rolled aluminum alloy; wherein the cold deformation of the aluminum alloy is 5%.
S3, tempering the cold-rolled aluminum alloy at 350 ℃ for 2 h;
and S4, then carrying out annealing treatment, wherein the temperature of the annealing treatment is 140 ℃, and the time is 7 h.
The embodiment also comprises the aluminum alloy prepared by the heat treatment method.
Example 6
The aluminum alloy in this example is an aluminum alloy product obtained by extrusion casting.
The embodiment provides a heat treatment method of an aluminum alloy, which comprises the following components in percentage by mass: 10% of stainless steel fiber, 6.8% of Mg6.5%, 2.5% of ZnCu 1.8%, 0.08% of Sc, 0.18% of Zr, 0.12% of Y, 0.04% of Si, 0.07% of Mn, 0.03% of Er, 0.01% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 500 ℃ for 4h, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the aluminum alloy after the high-temperature treatment; the content of PAG polymer in the PAG quenching liquid is 30 wt%, the temperature of the PAG quenching liquid is 80 ℃, and the stirring speed of the PAG quenching liquid is 150 r/s;
s2, performing cold rolling treatment on the aluminum alloy subjected to the high-temperature treatment to obtain a cold-rolled aluminum alloy; wherein the cold deformation of the aluminum alloy is 9%.
S3, tempering the aluminum alloy after cold rolling for 1.5h at 400 ℃;
and S4, then carrying out annealing treatment, wherein the temperature of the annealing treatment is 150 ℃, and the time is 7 h.
The embodiment also comprises the aluminum alloy prepared by the heat treatment method.
As a modification of the present embodiment, the aluminum alloy in the above embodiment may be an aluminum alloy product formed by gravity casting or low-pressure casting.
The strength of the heat treated aluminum alloys of examples 1-6 above was compared to the strength of the aluminum alloy before heat treatment, specifically tested in accordance with GB/t228-2010, and the tensile strength data for the aluminum alloys was obtained, see Table 1.
TABLE 1 comparison of tensile Strength of aluminum alloys before and after Heat treatment of examples 1-6
| Examples | Tensile Strength (MPa) before Heat treatment | Tensile Strength (MPa) after Heat treatment |
| Example 1 | 619 | 694 |
| Example 2 | 618 | 687 |
| Example 3 | 596 | 679 |
| Example 4 | 588 | 716 |
| Example 5 | 628 | 728 |
| Example 6 | 635 | 735 |
As can be seen from Table 1, the tensile strength of the aluminum alloy subjected to thermal nursing by adopting the technical scheme of the invention is obviously improved to 735 MPa.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications can be made without departing from the spirit of the invention, and all the properties or uses are considered to be within the scope of the invention.
Claims (3)
1. The heat treatment method of the aluminum alloy is characterized by comprising the following components in percentage by mass:
8-10% of metal fiber, 5.5-7.2% of Mg5.0-2.5% of Zn, 0.8-1.8% of Cu, 0.08-0.18% of Sc, 0.08-0.18% of Zr, 0.12-0.22% of Y, 0.02-0.07% of Si, 0.02-0.07% of Mn, 0.01-0.03% of Er, 0.01-0.03% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the heat treatment step includes:
s1, carrying out high-temperature heat treatment on the aluminum alloy at 500-600 ℃, and quenching by using a PAG quenching liquid after the high-temperature heat treatment to obtain the high-temperature treated aluminum alloy; the content of the PAG polymer in the PAG quenching liquid is 15-60 wt%, the temperature of the PAG quenching liquid is 40-80 ℃, and the stirring speed of the PAG quenching liquid is 100-200 r/s;
s2, performing cold deformation treatment on the aluminum alloy subjected to the high-temperature treatment to obtain the aluminum alloy subjected to cold deformation;
s3, tempering the aluminum alloy after cold deformation for 1-2 hours at 300-400 ℃;
s4, then carrying out annealing treatment, wherein the temperature of the annealing treatment is 100-160 ℃, and the time is 6-8 h;
in step S1, the high-temperature heat treatment time is 3-4 h; the cold deformation treatment comprises cold drawing or cold rolling; the cold deformation amount of the aluminum alloy subjected to cold deformation treatment is 5-15%.
2. The heat treatment method for an aluminum alloy according to claim 1, wherein in step S1, the content of PAG polymer in the PAG quenching liquid is 25 to 45 wt%, the temperature of the PAG quenching liquid is 50 to 70 ℃, and the stirring rate of the PAG quenching liquid is 130 to 160 r/S;
in step S4, the temperature of the annealing treatment is 120-150 ℃ and the time is 7-7.5 h;
the aluminum alloy is an aluminum alloy product formed by extrusion casting;
the aluminum alloy comprises the following components in percentage by mass: 8% of metal fiber, 6.2% of Mg6.0%, 1.0% of Zno, 1% of Cu, 0.12% of Sc, 0.13% of Zr, 0.16% of Y, 0.04% of Si, 0.07% of Mn, 0.02% of Er, 0.02% of Ce, less than or equal to 0.15% of impurity and the balance of Al;
the metal fibers comprise stainless steel fibers and/or carbon steel fibers.
3. An aluminum alloy produced by the heat treatment method for an aluminum alloy according to claim 1 or 2.
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