CN115595476B - High heat conduction aluminum alloy for 5G communication equipment and preparation method thereof - Google Patents
High heat conduction aluminum alloy for 5G communication equipment and preparation method thereof Download PDFInfo
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- CN115595476B CN115595476B CN202211327075.1A CN202211327075A CN115595476B CN 115595476 B CN115595476 B CN 115595476B CN 202211327075 A CN202211327075 A CN 202211327075A CN 115595476 B CN115595476 B CN 115595476B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 38
- 238000004891 communication Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 50
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000007670 refining Methods 0.000 claims abstract description 33
- 238000007872 degassing Methods 0.000 claims abstract description 30
- 230000032683 aging Effects 0.000 claims abstract description 25
- 239000002893 slag Substances 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 238000003723 Smelting Methods 0.000 claims abstract description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001257 hydrogen Substances 0.000 claims abstract description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 10
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 229910001278 Sr alloy Inorganic materials 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- -1 industrial Si Substances 0.000 claims description 2
- 239000000956 alloy Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- 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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- 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
- 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
- C22F1/043—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 silicon 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
Abstract
A high heat conduction aluminum alloy for 5G communication equipment and a preparation method thereof belong to the technical field of aluminum alloy production, and the aluminum alloy comprises the following components in percentage by weight: 3.0 to 5.0 percent of Si; fe:0.5% -0.7%; zn:0.1% -0.2%; sr:0.025-0.035%; b:0.01-0.015%; total La and Ce: 0.2% -0.3%; the single content of other impurities is less than or equal to 0.01 percent, and the balance is aluminum. The preparation method comprises the following steps: preparing materials, heating and melting, temperature-controlled smelting, slag skimming and refining, melting and stirring, degassing in a furnace, detecting the content of hydrogen and slag, casting and double-stage artificial aging. The sampling test proves that the aluminum alloy material provided by the invention has good heat conduction performance.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy production, and particularly relates to a high heat conduction aluminum alloy for 5G communication equipment and a preparation method thereof.
Background
With the progress and rapid development of modern electronic information and manufacturing technology, especially the rapid development of 5G communication products, higher requirements are put forward on the heat dissipation performance of materials, the heat dissipation problem of aluminum alloy structural members becomes more and more a bottleneck of the development of communication technology, and the aluminum alloy materials in the prior art cannot meet the technical application needs, so that a material with high heat conductivity is urgently needed. The Al-Si alloy has excellent casting performance and heat and electric conduction performance. The invention provides a novel Al-Si die-casting aluminum alloy material, which has excellent electric conduction and heat conduction properties through optimization of a material formula and a production process, and has wide market prospect and technical advantages in the industries with high requirements on the heat conduction properties of materials, such as the technical field of new-generation communication.
Disclosure of Invention
The invention provides a high heat conduction aluminum alloy for 5G communication equipment and a preparation method thereof, which are used for solving the problems in the background technology.
The technical problems solved by the invention are realized by adopting the following technical scheme:
the high heat conduction aluminum alloy for the 5G communication equipment comprises the following components in percentage by weight: 3.0 to 5.0 percent of Si; fe:0.5% -0.7%; zn:0.1% -0.2%; sr:0.025-0.035%; b:0.01-0.015%; total La and Ce: 0.2% -0.3%; the single content of other impurities is less than or equal to 0.01 percent, and the balance is aluminum.
The preparation method comprises the following steps:
(1) Preparing raw materials for standby according to the proportion;
(2) Heating and melting: firstly, putting an aluminum ingot for remelting into a furnace, heating and smelting, smelting an aluminum melt, stirring, and preserving heat for 35-40min;
(3) And (3) temperature control smelting: adding industrial Si, metal Fe, pure Zn and other raw materials for smelting, and fully stirring to a height of Wen Rongti;
(4) Slag skimming and refining: taking out ash residues in the high-temperature aluminum melt, uniformly stirring, adopting a refining agent and high-purity argon gas 'dispersion non-chained refining' process, carrying out powder spraying refining twice, and removing slag after each refining is finished, so as to remove the scum on the aluminum melt;
(5) Melting and stirring: adding Al-B, al-Sr alloy and La/Ce mixed rare earth, fully stirring an aluminum melt, and sampling and analyzing chemical components;
(6) Degassing in a furnace: degassing by adopting a high-purity argon 'dispersion non-chained degassing' process, and standing for 25-35min after degassing;
(7) Detecting the hydrogen content and the slag content: detecting the hydrogen content and the slag content of the aluminum melt by using a decompression solidification device and a K die;
(8) Casting: casting qualified aluminum melt, carrying out online degassing and double-layer ceramic filtering on a launder, and carrying out automatic ingot stacking after aluminum alloy molding;
(9) Two-stage artificial aging: the artificial aging process of the aluminum alloy is 175+/-5 ℃, the aging time is 30min, the aluminum alloy is naturally cooled to normal temperature, and then the second artificial aging is carried out, wherein the aging process is 150+/-5 ℃ and the aging time is 30min.
The beneficial effects of the invention are as follows:
according to the invention, through optimizing the proportion of the chemical components of the aluminum alloy, the aluminum alloy material with good heat conductivity is obtained, and the aluminum alloy material is particularly suitable for application to structural members with high heat conductivity requirements in new technologies such as 5G communication and the like.
Detailed Description
The present invention is described more fully below in order to facilitate an understanding of the present invention. This invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Examples
The high heat conduction aluminum alloy for the 5G communication equipment comprises the following components in percentage by weight: 3.5% of Si; fe:0.55%; zn:0.15%; sr:0.03%; b:0.012%; total La and Ce: 0.25%; the single content of other impurities is less than or equal to 0.01 percent, and the balance is aluminum.
The preparation method comprises the following steps:
(1) Preparing raw materials for standby according to the proportion;
(2) Heating and melting: firstly, putting an aluminum ingot for remelting into a furnace for heating and smelting, controlling the smelting temperature of an aluminum melt at 880-890 ℃, stirring the high-temperature aluminum melt for 5-6 minutes, and preserving the heat for 35-40 minutes;
(3) And (3) temperature control smelting: adding raw materials such as industrial Si, metal Fe, pure Zn and the like for smelting, controlling the smelting temperature of an aluminum melt at 730-740 ℃, and fully stirring the aluminum melt to a height of Wen Rongti;
(4) Slag skimming and refining: taking off ash residues in the high-temperature aluminum melt, controlling the temperature of the high-temperature aluminum melt at 730-740 ℃, uniformly stirring, adopting a refining agent and high-purity argon gas 'dispersion non-chain type refining' process, carrying out powder spraying refining twice, wherein a refining pipe is 50 porous refining with the inner diameter phi of 5mm, the refining time is 20-30min each time, the spraying amount of the refining agent is controlled at 1Kg/min, the pressure is 0.25-0.35MPa, and removing slag on the aluminum melt after each refining is finished;
(5) Melting and stirring: adding Al-B, al-Sr alloy and La/Ce mixed rare earth, fully stirring an aluminum melt, and sampling and analyzing chemical components;
(6) Degassing in a furnace: the temperature of the molten aluminum is controlled at 700-720 ℃, a high-purity argon 'dispersion non-chained degassing' process is adopted for degassing, a degassing pipe is 50 porous degassing with the inner diameter phi of 5mm, the degassing time is 30-40min, the pressure is 0.20-0.45MPa, and the mixture is kept stand for 25-35min after degassing;
(7) Detecting the hydrogen content and the slag content: detecting the hydrogen content and the slag content of the aluminum melt by using a decompression solidification device and a K die, so that the hydrogen content is less than 0.2cc/100gAl, and the slag content is less than or equal to 1/20;
(8) Casting: casting qualified aluminum melt at 690-710 ℃, carrying out online degassing and double-layer ceramic filtering in a launder, and carrying out automatic ingot stacking after aluminum alloy molding;
(9) Two-stage artificial aging: the artificial aging process of the aluminum alloy is 175+/-5 ℃, the aging time is 30min, the aluminum alloy is naturally cooled to normal temperature, and then the second artificial aging is carried out, wherein the aging process is 150+/-5 ℃ and the aging time is 30min.
The aluminum alloy produced in this example was sampled for thermal conductivity using ASTM E1461-13, ASTM E1269-11 (Reapplied 2018), GB/T1423-1996 standards. The sample ratios are as follows (chemical composition/%):
| test piece number | Si | Fe | Zn | Sr | B | Total of La and Ce | Other impurity single item (maximum value) |
| 1 | 3.56 | 0.551 | 0.147 | 0.032 | 0.012 | 0.254 | 0.0073 |
| 2 | 3.59 | 0.552 | 0.150 | 0.033 | 0.012 | 0.254 | 0.0072 |
| 3 | 3.52 | 0.550 | 0.146 | 0.031 | 0.012 | 0.257 | 0.0067 |
| 4 | 3.55 | 0.548 | 0.149 | 0.031 | 0.012 | 0.246 | 0.0069 |
| 5 | 3.56 | 0.551 | 0.151 | 0.030 | 0.011 | 0.248 | 0.0068 |
The actual thermal conductivity is as follows:
| test piece number | Coefficient of thermal conductivity (W/(m.K)) |
| 1 | 208.6 |
| 2 | 209.7 |
| 3 | 205.9 |
| 4 | 210.1 |
| 5 | 208.5 |
Examples
The high heat conduction aluminum alloy for the 5G communication equipment comprises the following components in percentage by weight: 4.5% of Si; fe:0.65%; zn:0.15%; sr:0.03%; b:0.012%; total La and Ce: 0.25%; the single content of other impurities is less than or equal to 0.01 percent, and the balance is aluminum.
The preparation method comprises the following steps:
(1) Preparing raw materials for standby according to the proportion;
(2) Heating and melting: firstly, putting an aluminum ingot for remelting into a furnace for heating and smelting, controlling the smelting temperature of an aluminum melt at 880-890 ℃, stirring the high-temperature aluminum melt for 5-6 minutes, and preserving the heat for 35-40 minutes;
(3) And (3) temperature control smelting: adding raw materials such as industrial silicon Si, metal Fe, pure Zn and the like for smelting, controlling the smelting temperature of an aluminum melt at 730-740 ℃, and fully stirring the aluminum melt to a height of Wen Rongti;
(4) Slag skimming and refining: taking off ash residues in the high-temperature aluminum melt, controlling the temperature of the high-temperature aluminum melt at 730-740 ℃, uniformly stirring, adopting a refining agent and high-purity argon gas 'dispersion non-chain type refining' process, carrying out powder spraying refining twice, wherein a refining pipe is 50 porous refining with the inner diameter phi of 5mm, the refining time is 20-30min each time, the spraying amount of the refining agent is controlled at 1Kg/min, the pressure is 0.25-0.35MPa, and removing slag on the aluminum melt after each refining is finished;
(5) Melting and stirring: adding Al-B, al-Sr alloy and La/Ce mixed rare earth, fully stirring an aluminum melt, and sampling and analyzing chemical components;
(6) Degassing in a furnace: the temperature of the molten aluminum is controlled at 700-720 ℃, a high-purity argon 'dispersion non-chained degassing' process is adopted for degassing, a degassing pipe is 50 porous degassing with the inner diameter phi of 5mm, the degassing time is 30-40min, the pressure is 0.20-0.45MPa, and the mixture is kept stand for 25-35min after degassing;
(7) Detecting the hydrogen content and the slag content: detecting the hydrogen content and the slag content of the aluminum melt by using a decompression solidification device and a K die, so that the hydrogen content is less than 0.2cc/100gAl, and the slag content is less than or equal to 1/20;
(8) Casting: casting qualified aluminum melt at 690-710 ℃, carrying out online degassing and double-layer ceramic filtering in a launder, and carrying out automatic ingot stacking after aluminum alloy molding;
(9) Two-stage artificial aging: the artificial aging process of the aluminum alloy is 175+/-5 ℃, the aging time is 30min, the aluminum alloy is naturally cooled to normal temperature, and then the second artificial aging is carried out, wherein the aging process is 150+/-5 ℃ and the aging time is 30min.
The aluminum alloy produced in this example was sampled for thermal conductivity using ASTM E1461-13, ASTM E1269-11 (Reapplied 2018), GB/T1423-1996 standards. The sample ratio is as follows:
the sample ratios are as follows (chemical composition/%):
| test piece number | Si | Fe | Zn | Sr | B | Total of La and Ce | Other impurity single item (maximum value) |
| 1 | 4.56 | 0.653 | 0.149 | 0.031 | 0.012 | 0.247 | 0.0068 |
| 2 | 4.59 | 0.656 | 0.151 | 0.031 | 0.012 | 0.245 | 0.0069 |
| 3 | 4.42 | 0.652 | 0.148 | 0.030 | 0.012 | 0.250 | 0.0067 |
| 4 | 4.45 | 0.642 | 0.149 | 0.030 | 0.011 | 0.250 | 0.0066 |
| 5 | 4.56 | 0.657 | 0.150 | 0.029 | 0.011 | 0.249 | 0.0065 |
The actual thermal conductivity is as follows:
| test piece number | Coefficient of thermal conductivity (W/(-)m·K）） |
| 1 | 203.1 |
| 2 | 204.5 |
| 3 | 205.3 |
| 4 | 206.4 |
| 5 | 204.7 |
The above examples mainly illustrate the high heat conduction aluminum alloy for 5G communication equipment and the preparation method thereof. While only limited embodiments and features thereof have been described, those skilled in the art will appreciate that the invention can be practiced in many other forms without departing from the spirit and scope thereof. Accordingly, the illustrated embodiments are to be considered as illustrative and not restrictive, and the invention may be embodied in various modifications and alternative forms without departing from the spirit or scope of the invention as defined in the appended claims.
Claims (3)
1. The preparation method of the high heat conduction aluminum alloy for the 5G communication equipment is characterized by comprising the following components in percentage by weight: 3.0 to 5.0 percent of Si; fe:0.5% -0.7%; zn:0.1% -0.2%; sr:0.025-0.035%; b:0.01-0.015%; total La and Ce: 0.2% -0.3%; other impurity single items are less than or equal to 0.01 percent, and the balance is aluminum; the preparation method comprises the following steps:
(1) Preparing raw materials for standby according to the proportion;
(2) Heating and melting: firstly, putting an aluminum ingot for remelting into a furnace for heating and smelting, controlling the smelting temperature of an aluminum melt at 880-890 ℃, stirring the high-temperature aluminum melt for 5-6 minutes, and preserving the heat for 35-40 minutes;
(3) And (3) temperature control smelting: adding raw materials such as industrial Si, metal Fe, pure Zn and the like for smelting, controlling the smelting temperature of an aluminum melt at 730-740 ℃, and fully stirring the aluminum melt to a height of Wen Rongti;
(4) Slag skimming and refining: taking off ash residues in the high-temperature aluminum melt, controlling the temperature of the high-temperature aluminum melt at 730-740 ℃, uniformly stirring, adopting a refining agent and high-purity argon gas 'dispersion non-chain type refining' process, carrying out powder spraying refining twice, wherein a refining pipe is 50 porous refining with the inner diameter phi of 5mm, the refining time is 20-30min each time, the spraying amount of the refining agent is controlled at 1Kg/min, the pressure is 0.25-0.35MPa, and removing slag on the aluminum melt after each refining is finished;
(5) Melting and stirring: adding Al-B, al-Sr alloy and La/Ce mixed rare earth, fully stirring an aluminum melt, and sampling and analyzing chemical components;
(6) Degassing in a furnace: the temperature of the molten aluminum is controlled at 700-720 ℃, a high-purity argon 'dispersion non-chained degassing' process is adopted for degassing, a degassing pipe is 50 porous degassing with the inner diameter phi of 5mm, the degassing time is 30-40min, the pressure is 0.20-0.45MPa, and the mixture is kept stand for 25-35min after degassing;
(7) Detecting the hydrogen content and the slag content: detecting the hydrogen content and the slag content of the aluminum melt by using a decompression solidification device and a K die, so that the hydrogen content is less than 0.2cc/100gAl, and the slag content is less than or equal to 1/20;
(8) Casting: casting qualified aluminum melt at 690-710 ℃, carrying out online degassing and double-layer ceramic filtering in a launder, and carrying out automatic ingot stacking after aluminum alloy molding;
(9) Two-stage artificial aging: the artificial aging process of the aluminum alloy is 175+/-5 ℃, the aging time is 30min, the aluminum alloy is naturally cooled to normal temperature, and then the second artificial aging is carried out, wherein the aging process is 150+/-5 ℃ and the aging time is 30min.
2. The method for preparing the high heat-conducting aluminum alloy for the 5G communication equipment according to claim 1, wherein the aluminum alloy comprises the following components in percentage by weight: 3.5% of Si; fe:0.55%; zn:0.15%; sr:0.03%; b:0.012%; total La and Ce: 0.25%; the single content of other impurities is less than or equal to 0.01 percent, and the balance is aluminum.
3. The method for preparing the high heat-conducting aluminum alloy for the 5G communication equipment according to claim 1, wherein the aluminum alloy comprises the following components in percentage by weight: 4.5% of Si; fe:0.65%; zn:0.15%; sr:0.03%; b:0.012%; total La and Ce: 0.25%; the single content of other impurities is less than or equal to 0.01 percent, and the balance is aluminum.
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Denomination of invention: A high thermal conductivity aluminum alloy and its preparation method for 5G communication equipment Effective date of registration: 20231201 Granted publication date: 20230609 Pledgee: Bank of China Limited Chongren sub branch Pledgor: JIANGXI WANTAI ALUMINUM Co.,Ltd. Registration number: Y2023980069086 |
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