CN115558826A - High-strength high-conductivity aluminum alloy material containing rare earth elements - Google Patents
High-strength high-conductivity aluminum alloy material containing rare earth elements Download PDFInfo
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- CN115558826A CN115558826A CN202211291899.8A CN202211291899A CN115558826A CN 115558826 A CN115558826 A CN 115558826A CN 202211291899 A CN202211291899 A CN 202211291899A CN 115558826 A CN115558826 A CN 115558826A
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- aluminum alloy
- aluminum
- rare earth
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- earth elements
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- 239000000956 alloy Substances 0.000 title claims abstract description 56
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 53
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 40
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 36
- 238000002844 melting Methods 0.000 claims abstract description 36
- 230000008018 melting Effects 0.000 claims abstract description 36
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 claims abstract description 27
- 238000003723 Smelting Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 229910000765 intermetallic Inorganic materials 0.000 abstract description 3
- 229910052772 Samarium Inorganic materials 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 229910052693 Europium Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- -1 erbium aluminum Chemical compound 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium 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
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a high-strength high-conductivity aluminum alloy material containing rare earth elements, which relates to the field of preparation of aluminum alloy materials, and adopts the technical scheme that the high-strength high-conductivity aluminum alloy material comprises 7075 aluminum alloy, sm aluminum and Eu aluminum, wherein the total proportion of the Sm aluminum is 1.29-1.86%, the total proportion of the Eu aluminum is 2.34-4.76%, and the preparation method comprises the following steps: the method comprises the following steps: smelting: putting 7075 aluminum alloy into a melting furnace, and heating until 7075 aluminum alloy is melted to form an aluminum alloy solution; step two: adding Sm aluminum and Eu aluminum into the aluminum alloy solution, and then carrying out heating smelting again; step three: casting: casting the smelted aluminum alloy solution; step four: for the cryogenic treatment of the cast aluminum alloy, sm aluminum and Eu aluminum are added into 7075 aluminum alloy, so that the defects of the 7075 aluminum alloy surface can be filled, the surface tension is reduced, and Sm, eu and the alloy exist in the form of intermetallic compounds, so that the high-temperature thermodynamic property of the alloy can be effectively improved.
Description
Technical Field
The invention relates to the technical field of aluminum alloy material preparation, in particular to a high-strength high-conductivity aluminum alloy material containing rare earth elements.
Background
Aluminum alloys are the most widely used non-ferrous structural materials in the industry today and have found a large number of applications in the aerospace, automotive, marine, mechanical manufacturing and chemical industries. With the rapid development of industrial economy all over the world, the demand on aluminum alloy components is increasing, and the aluminum alloy components become the most applied alloy at present. With the continuous and deep research on aluminum alloy materials, aluminum alloy products with different models are invented, wherein high-strength aluminum alloy (2000, 7000 series) is applied to commercial airplanes with excellent comprehensive performance, the structural quality of the aluminum alloy reaches more than 80%, and the aluminum alloy is gradually applied to aspects of life, military and science and technology; the 7075 aluminum alloy is a cold-processed forging alloy, has high strength and is far better than mild steel.
In a complex and changeable environment, the problems of spalling corrosion, stress corrosion, intergranular corrosion and the like easily occur to the aluminum alloy material, and the performance of the aluminum alloy is improved by adding rare earth elements, so that a high-strength and high-conductivity aluminum alloy material containing the rare earth elements is needed.
Disclosure of Invention
The invention aims to solve the defects of easy peeling corrosion, stress corrosion and intergranular corrosion in the prior art, and provides a high-strength high-conductivity aluminum alloy material containing rare earth elements.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-strength high-conductivity aluminum alloy material containing rare earth elements comprises 7075 aluminum alloy, sm aluminum and Eu aluminum, wherein the total content of the Sm aluminum is 1.29-1.86%, and the total content of the Eu aluminum is 2.34-4.76%.
The above technical solution further comprises:
a preparation method of a high-strength high-conductivity aluminum alloy material containing rare earth elements comprises the following steps:
the method comprises the following steps: smelting: putting 7075 aluminum alloy into a melting furnace, and heating until 7075 aluminum alloy is melted to form an aluminum alloy solution;
step two: adding Sm aluminum and Eu aluminum into the aluminum alloy solution, and then carrying out heating smelting again;
step three: casting: casting the smelted aluminum alloy solution;
step four: and (4) carrying out cryogenic treatment on the cast aluminum alloy.
The temperature of the melting furnace is 635-645 ℃ when 7075 aluminum alloy is melted, and the melting time is 1.5-2.5h.
Adding Sm aluminum and Eu aluminum, then melting furnace temperature is 670-680 ℃, and melting time is 2-3h.
During the melting process in the melting furnace, the melting furnace is always filled with inert gas.
The cryogenic treatment is divided into two stages.
The first stage of subzero treatment lasts 20-24h at-196 ℃, and the second stage of subzero treatment lasts 24-28h at-196 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, sm aluminum and Eu aluminum are added into 7075 aluminum alloy, so that the defects on the surface of 7075 aluminum alloy can be filled, the surface tension is reduced, sm and Eu react with elements in H, O, S, si and the like in a melt to form stable compounds and are discharged, and Sm and Eu exist in the form of intermetallic compounds with the alloy, so that the high-temperature thermodynamic property of the alloy can be effectively improved.
2. According to the invention, the granular second phase is finer and dispersed through two-stage cryogenic treatment, so that the hardness and the wear resistance of the aluminum alloy are improved.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
Firstly, adding 7075 aluminum alloy into a melting furnace, heating to melt 7075 aluminum alloy to form an aluminum alloy solution, wherein the melting furnace is used for melting 7075 aluminum alloy at the temperature of 635-645 ℃ for 1.5-2.5 hours;
in the process of melting in the melting furnace, the melting furnace is filled with inert gas all the time;
secondly, adding Sm aluminum and Eu aluminum into the aluminum alloy solution, then carrying out heating smelting again, wherein the temperature of a smelting furnace is 670-680 ℃ after adding the Sm aluminum and the Eu aluminum, and the smelting time is 2-3h;
thirdly, casting the smelted aluminum alloy solution;
fourthly, carrying out cryogenic treatment on the cast aluminum alloy, wherein the cryogenic treatment is divided into two stages, the first stage of cryogenic treatment lasts for 20-24 hours at the temperature of-196 ℃, and the second stage of cryogenic treatment lasts for 24-28 hours at the temperature of-196 ℃;
1.29-1.86% of Sm aluminum and 2.34-4.76% of Eu aluminum.
Example two
Firstly, putting 7075 aluminum alloy into a melting furnace, heating until 7075 aluminum alloy is melted to form an aluminum alloy solution, wherein the temperature of the melting furnace is 635-645 ℃ when 7075 aluminum alloy is melted, and the melting time is 1.5-2.5h;
in the process of melting in the melting furnace, the melting furnace is filled with inert gas all the time;
secondly, adding Sm aluminum and Eu aluminum into the aluminum alloy solution, then carrying out heating smelting again, wherein the temperature of a smelting furnace is 670-680 ℃ after adding the Sm aluminum and the Eu aluminum, and the smelting time is 2-3h;
step three, casting the smelted aluminum alloy solution;
the total content of Sm aluminum is 1.29-1.86%, and the total content of Eu aluminum is 2.34-4.76%.
EXAMPLE III
Firstly, putting 7075 aluminum alloy into a melting furnace, heating until 7075 aluminum alloy is melted to form an aluminum alloy solution, wherein the temperature of the melting furnace is 635-645 ℃ when 7075 aluminum alloy is melted, and the melting time is 1.5-2.5h;
in the process of melting in the melting furnace, the melting furnace is filled with inert gas all the time;
secondly, adding erbium aluminum into the aluminum alloy solution, then heating and smelting again, wherein the temperature of a smelting furnace is 670-680 ℃ after the erbium aluminum is added, and the smelting time is 2-3h;
step three, casting the smelted aluminum alloy solution;
fourthly, performing cryogenic treatment on the cast aluminum alloy, wherein the cryogenic treatment is divided into two stages, the first stage of cryogenic treatment lasts for 20-24 hours at the temperature of-196 ℃, and the second stage of cryogenic treatment lasts for 24-28 hours at the temperature of-196 ℃;
the alloys prepared in the first, second and third examples were tested, and the test results are shown in the following table:
| test item | Example one | Example two | EXAMPLE III |
| Melting Point | 678℃ | 661℃ | 653℃ |
| Coefficient of thermal conductivity | 11.3W/(m.K) | 11.0W/(m.K) | 10.9W/(m.K) |
| Shear modulus | 80.2GPa | 80.1GPa | 79.3GPa |
Sm aluminum and Eu aluminum are added into 7075 aluminum alloy, so that the defects on the surface of 7075 aluminum alloy can be filled, and the surface tension is reduced;
sm and Eu react with elements such as H, O, S, si in the melt to form stable compounds and discharge the stable compounds;
meanwhile, sm, eu and the alloy exist in the form of intermetallic compounds, the high-temperature thermodynamic property of the alloy can be effectively improved, and the granular second phase is finer and more dispersed through two-stage cryogenic treatment, so that the hardness and the wear resistance of the aluminum alloy are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (7)
1. The high-strength high-conductivity aluminum alloy material containing rare earth elements is characterized by comprising 7075 aluminum alloy, sm aluminum and Eu aluminum, wherein the total content of the Sm aluminum is 1.29-1.86%, and the total content of the Eu aluminum is 2.34-4.76%.
2. A high-strength high-conductivity aluminum alloy material containing rare earth elements according to claim 1, characterized in that the preparation method comprises the following steps:
the method comprises the following steps: smelting: putting 7075 aluminum alloy into a melting furnace, and heating until 7075 aluminum alloy is melted to form an aluminum alloy solution;
step two: adding Sm aluminum and Eu aluminum into the aluminum alloy solution, and then carrying out heating smelting again;
step three: casting: casting the smelted aluminum alloy solution;
step four: and (4) carrying out cryogenic treatment on the cast aluminum alloy.
3. A high-strength high-conductivity aluminum alloy material containing rare earth elements as claimed in claim 2, wherein the melting furnace temperature is 635-645 ℃ for melting 7075 aluminum alloy, and the melting time is 1.5-2.5h.
4. The high-strength high-conductivity aluminum alloy material containing rare earth elements as claimed in claim 2, wherein the melting furnace temperature is 670 ℃ -680 ℃ after Sm aluminum and Eu aluminum are added, and the melting time is 2-3h.
5. A high-strength high-conductivity aluminum alloy material containing a rare earth element according to claim 2, wherein the melting furnace is filled with an inert gas all the time during melting in the melting furnace.
6. The high-strength high-conductivity aluminum alloy material containing rare earth elements as claimed in claim 2, wherein the cryogenic treatment is divided into two stages.
7. The high-strength high-conductivity aluminum alloy material containing rare earth elements as claimed in claim 6, wherein the first stage of cryogenic treatment is performed for 20-24 hours at-196 ℃, and the second stage of cryogenic treatment is performed for 24-28 hours at-196 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211291899.8A CN115558826A (en) | 2022-10-20 | 2022-10-20 | High-strength high-conductivity aluminum alloy material containing rare earth elements |
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| CN202211291899.8A CN115558826A (en) | 2022-10-20 | 2022-10-20 | High-strength high-conductivity aluminum alloy material containing rare earth elements |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03111533A (en) * | 1990-05-18 | 1991-05-13 | Showa Alum Corp | High strength aluminum alloy excellent in stress corrosion cracking resistance |
| CN103014457A (en) * | 2012-12-01 | 2013-04-03 | 滁州佳诚模具制造有限公司 | Processing method of improved 7075 aluminum alloy refrigerator foaming die cast |
| CN104805341A (en) * | 2015-05-16 | 2015-07-29 | 李白 | High-safety mining high-strength ventilator |
| CN105441751A (en) * | 2015-11-18 | 2016-03-30 | 宁波市鄞州银鑫铝业有限公司 | Aluminum pipe special for warmer |
| CN107937773A (en) * | 2017-12-19 | 2018-04-20 | 辽宁忠大铝业有限公司 | A kind of heat-resisting aluminium alloy and preparation method thereof |
| CN108467979A (en) * | 2018-06-25 | 2018-08-31 | 上海交通大学 | A kind of metal mold gravity casting aluminum alloy materials and preparation method thereof |
| CN108559891A (en) * | 2018-05-28 | 2018-09-21 | 沧州市东众特种合金制造有限公司 | Aluminium, zinc, magnesium, the wrought aluminium alloy of scandium system and its manufacturing method |
| CN108624787A (en) * | 2018-04-28 | 2018-10-09 | 东莞市润华铝业有限公司 | A kind of radiator aluminum alloy and preparation method thereof |
| CN110983128A (en) * | 2019-09-23 | 2020-04-10 | 山东南山铝业股份有限公司 | High-strength heat-resistant wrought aluminum alloy and preparation method thereof |
-
2022
- 2022-10-20 CN CN202211291899.8A patent/CN115558826A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03111533A (en) * | 1990-05-18 | 1991-05-13 | Showa Alum Corp | High strength aluminum alloy excellent in stress corrosion cracking resistance |
| CN103014457A (en) * | 2012-12-01 | 2013-04-03 | 滁州佳诚模具制造有限公司 | Processing method of improved 7075 aluminum alloy refrigerator foaming die cast |
| CN104805341A (en) * | 2015-05-16 | 2015-07-29 | 李白 | High-safety mining high-strength ventilator |
| CN105441751A (en) * | 2015-11-18 | 2016-03-30 | 宁波市鄞州银鑫铝业有限公司 | Aluminum pipe special for warmer |
| CN107937773A (en) * | 2017-12-19 | 2018-04-20 | 辽宁忠大铝业有限公司 | A kind of heat-resisting aluminium alloy and preparation method thereof |
| CN108624787A (en) * | 2018-04-28 | 2018-10-09 | 东莞市润华铝业有限公司 | A kind of radiator aluminum alloy and preparation method thereof |
| CN108559891A (en) * | 2018-05-28 | 2018-09-21 | 沧州市东众特种合金制造有限公司 | Aluminium, zinc, magnesium, the wrought aluminium alloy of scandium system and its manufacturing method |
| CN108467979A (en) * | 2018-06-25 | 2018-08-31 | 上海交通大学 | A kind of metal mold gravity casting aluminum alloy materials and preparation method thereof |
| CN110983128A (en) * | 2019-09-23 | 2020-04-10 | 山东南山铝业股份有限公司 | High-strength heat-resistant wrought aluminum alloy and preparation method thereof |
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