CN109022855A - A kind of preparation method preparing high thermal conductivity aluminium alloy ingots - Google Patents
A kind of preparation method preparing high thermal conductivity aluminium alloy ingots Download PDFInfo
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- CN109022855A CN109022855A CN201810835706.8A CN201810835706A CN109022855A CN 109022855 A CN109022855 A CN 109022855A CN 201810835706 A CN201810835706 A CN 201810835706A CN 109022855 A CN109022855 A CN 109022855A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- 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
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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Abstract
The present invention relates to aluminum alloy materials preparation technical field, in particular to a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots, it is therefore intended that the heating conduction of alloy product is improved, to meet requirement of the special industry to aluminum alloy materials thermal conductivity.Main technological steps include: S1: A00 aluminium ingot and silicon materials being added in trial furnace, firing up fusing；S2: copper wire being added into trial furnace, continues heating fusing；S3: after the completion of A00 aluminium ingot all fusing, silicon materials and aluminium titanium boron wire is added, maintains temperature at 720-760 DEG C；S4: it is finished to all material fusing, takes molten aluminum to survey ingredient, and add respective material according to testing result；S5: when molten aluminum ingredient is met the requirements, temperature is controlled at 720-740 DEG C, sodium-free refining agent is added, is refined；S6: magnesium ingot being added into molten aluminum, makes content of magnesium composite demand；S7: Al rare earth alloy being added into molten aluminum, is mixed evenly, sample of casting.
Description
Technical field
The invention belongs to aluminum alloy materials preparation technical field, in particular to a kind of system for preparing high thermal conductivity aluminium alloy ingots
Preparation Method.
Background technique
Aluminium alloy ingots is to add other elements according to international standard or particular/special requirement using fine aluminium and recycling aluminium as raw material, such as:
Silicon (Si), copper (Cu), magnesium (Mg), iron (Fe) etc., improve fine aluminium in castability, chemically and physical deficiency is redeployed
Alloy is generally used for foundry industry.
Publication No. is that the Chinese invention patent of CN102051488A discloses a kind of production process of secondary aluminium alloy ingots for casting,
Its content that impurity Li element is added in stokehold detection and technique adjustment step in production process of secondary aluminium alloy ingots for casting
Detecting step increases the removal processing step of Li element when the weight content of Li element is greater than 0.001%.It passes through to Li
Constituent content is controlled, and finished product rate is improved.
But in actual production, installation is disclosed above is the aluminum alloy materials that technical solution produces, heating conduction compared with
Difference.Instantly the communications industry rapidly develops, and requires also to be continuously improved to the heat dissipation performance of product, still, current alloy product
Heat dissipation performance be unable to satisfy the requirement of the communications industry.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods for preparing high thermal conductivity aluminium alloy ingots, it is therefore intended that improves aluminium and closes
The heating conduction of golden product, to meet requirement of the special industry to aluminum alloy materials thermal conductivity.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of preparation method preparing high thermal conductivity aluminium alloy ingots, comprising the following steps:
S1: A00 aluminium ingot and silicon materials are added in trial furnace, and firing up fusing, temperature is between 550-650 DEG C；
S2: copper wire being added into trial furnace, continues heating fusing, temperature is between 650-720 DEG C；
S3: after the completion of A00 aluminium ingot all fusing, silicon materials and aluminium titanium boron wire is added, maintains temperature at 720-760 DEG C；
S4: it is finished to all material fusing, takes molten aluminum to survey ingredient, and add respective material according to testing result；
S5: when molten aluminum ingredient is met the requirements, temperature is controlled at 720-740 DEG C, sodium-free refining agent is added, is refined；
S6: magnesium ingot being added into molten aluminum, and content of magnesium is made to meet the requirements；
S7: Al rare earth alloy being added into molten aluminum, is mixed evenly, sample of casting.
Further, increase S6 ' between step S6 and S7, propylene oxide is added into molten aluminum.
Further, after Al rare earth alloy being added in the step s 7, before sample of casting, lighting process is carried out to molten aluminum.
Further, light frequency used in lighting process is in 5.8*1014-8.7*1014Hz。
Further, chemical element content weight percent in part requires as follows, Si 6.5-7.5% in molten aluminum；Cu
0.25-0.30%；Mg0.33-0.35%；Mn≤0.35%；Fe 0.55-0.60%；Zn≤0.35%；Ti≤0.1%.
Further, the silicon materials added in step S1 are the 4/5 of whole silicon materials.
Further, the silicon materials added in step S3 are the 1/5 of whole silicon materials.
Further, temperature of aluminum liquid is controlled when casting in step S7 at 710-730 DEG C.
The beneficial effects of the present invention are:
1. the present invention be adjusted by the content to the various chemical elements in molten aluminum, make the molten aluminum prepared have compared with
High heating conduction.
2. add propylene oxide in the present invention into molten aluminum when preparing molten aluminum, propylene oxide as a kind of electrophilic reagent,
The biggish metallic atom of the electron densities such as covalent bond and ionic bond in its attack molten aluminum keeps metallic atom atomic nucleus outer layer electric
The restraining force of son weakens.Meanwhile cooperating lighting process, so that atomic nucleus outer-shell electron is obtained enough energy and is shaken off nuclear
Constraint, becomes free electron.Because the thermally conductive warm-up movement for relying primarily on free electron of metal, increasing for free electron can mention
The heating conduction of high-aluminium alloy material product.Experimental result also confirms that above-mentioned processing mode can significantly improve aluminum alloy specimen
Thermal conductivity.
3. Al rare earth alloy is added in the present invention into molten aluminum, micronization processes are carried out to molten aluminum using rare earth alloy, so that
The molten aluminum casting character arrived improves, and intensity and plasticity make moderate progress, it is easier to casting processing.
Specific embodiment
Below in conjunction with specific embodiment, technical solution of the present invention is clearly and completely described.Obviously, it is retouched
The embodiment stated is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, originally
Field those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
A kind of preparation method preparing high thermal conductivity aluminium alloy ingots, specific preparation process each embodiment as follows.
Embodiment 1
S1: feeding intake, by A00 aluminium ingot 39kg, 533 silicon materials 2.32kg (4/5 amounts of silicon materials used in entirety) and chalybeate
0.17kg is added in trial furnace, and firing up fusing, Control experiment in-furnace temperature is between 550-570 DEG C.By easy oxygen when feeding intake
Small piece material of change such as silicon, iron etc. is added in furnace bottom, and not oxidizable big part material such as A00 aluminium ingot etc. is added in top.Silicon material is added
When material, charging scffold is placed on fire door, metallic silicon is poured on charging scffold, silicon is slowly pushed into aluminum water with rake, and
It is sufficiently stirred, is completely immersed in silicon in aluminum water, molten aluminum in furnace is stirred at interval of 30min, whether confirmation metallic silicon is complete
Fusing.
S2: after the fusing of part A00 aluminium ingot, when A00 aluminium ingot is unfused complete, copper wire 0.11kg being added into trial furnace,
It is immersed in it in molten aluminum, continues heating fusing, make to test in-furnace temperature between 650-660 DEG C.
S3: residue silicon materials 0.58kg and aluminium titanium boron wire 0.05kg is added after the completion of A00 aluminium ingot all fusing in range estimation,
Maintain test in-furnace temperature at 720-730 DEG C.
S4: it is finished to all material fusing, takes molten aluminum to survey each chemical element content, and add copper wire according to testing result
0.03kg。
S5: each chemical element reaches requirement in detection molten aluminum, controls temperature at 720-730 DEG C, and purchase is added from Changshu City
The sodium-free refining agent 1kg of Hong Jia fluorine Science and Technology Ltd. carries out refining operation.Refining agent is sprayed using powder blower when refinery process
Enter in trial furnace, discharge tube does not stop to move in trial furnace, it is ensured that cover entire molten bath.After refining, surface scum is scratched clean.
S6: magnesium ingot 0.14kg is added into the molten aluminum after refining, completely, content of magnesium reaches requirement for fusing.
S7: Al rare earth alloy (Al-RE) 0.05kg being added into molten aluminum, is mixed evenly, sample of casting, control casting
When temperature of aluminum liquid at 710 DEG C or so.
Embodiment 2
S1: feeding intake, by A00 aluminium ingot 40kg, 533 silicon materials 2.4kg (4/5 amounts of silicon materials used in entirety) and chalybeate
0.18kg is added in trial furnace, and firing up fusing, Control experiment in-furnace temperature is between 610-620 DEG C.By easy oxygen when feeding intake
Small piece material of change such as silicon, iron etc. is added in furnace bottom, and not oxidizable big part material such as A00 aluminium ingot etc. is added in top.Silicon material is added
When material, charging scffold is placed on fire door, metallic silicon is poured on charging scffold, silicon is slowly pushed into aluminum water with rake, and
It is sufficiently stirred, is completely immersed in silicon in aluminum water, molten aluminum in furnace is stirred at interval of 30min, whether confirmation metallic silicon is complete
Fusing.
S2: after the fusing of part A00 aluminium ingot, when A00 aluminium ingot is unfused complete, copper wire 0.12kg being added into trial furnace,
It is immersed in it in molten aluminum, continues heating fusing, make to test in-furnace temperature between 680-690 DEG C.
S3: residue silicon materials 0.6kg and aluminium titanium boron wire 0.07kg is added after the completion of A00 aluminium ingot all fusing in range estimation,
Maintain test in-furnace temperature at 740-750 DEG C.
S4: it is finished to all material fusing, takes molten aluminum to survey each chemical element content, and add silicon materials according to testing result
0.05kg。
S5: each chemical element reaches requirement in detection molten aluminum, controls temperature at 720-730 DEG C, and purchase is added from Changshu City
The sodium-free refining agent 1kg of Hong Jia fluorine Science and Technology Ltd. carries out refining operation.Refining agent is sprayed using powder blower when refinery process
Enter in trial furnace, discharge tube does not stop to move in trial furnace, it is ensured that cover entire molten bath.After refining, surface scum is scratched clean.
S6: magnesium ingot 0.15kg is added into the molten aluminum after refining, completely, content of magnesium reaches requirement for fusing.
S6 ': propylene oxide 5mL is added into molten aluminum, is sufficiently stirred.
S7: Al rare earth alloy (Al-RE) 0.06kg being added into molten aluminum, is mixed evenly, sample of casting, control casting
When temperature of aluminum liquid at 720 DEG C or so.
Embodiment 3
S1: feeding intake, by A00 aluminium ingot 40kg, 533 silicon materials 2.4kg (4/5 amounts of silicon materials used in entirety) and chalybeate
0.18kg is added in trial furnace, and firing up fusing, Control experiment in-furnace temperature is between 610-620 DEG C.By easy oxygen when feeding intake
Small piece material of change such as silicon, iron etc. is added in furnace bottom, and not oxidizable big part material such as A00 aluminium ingot etc. is added in top.Silicon material is added
When material, charging scffold is placed on fire door, metallic silicon is poured on charging scffold, silicon is slowly pushed into aluminum water with rake, and
It is sufficiently stirred, is completely immersed in silicon in aluminum water, molten aluminum in furnace is stirred at interval of 30min, whether confirmation metallic silicon is complete
Fusing.
S2: after the fusing of part A00 aluminium ingot, when A00 aluminium ingot is unfused complete, copper wire 0.12kg being added into trial furnace,
It is immersed in it in molten aluminum, continues heating fusing, make to test in-furnace temperature between 680-690 DEG C.
S3: residue silicon materials 0.6kg and aluminium titanium boron wire 0.07kg is added after the completion of A00 aluminium ingot all fusing in range estimation,
Maintain test in-furnace temperature at 740-750 DEG C.
S4: it is finished to all material fusing, takes molten aluminum to survey each chemical element content, and add silicon materials according to testing result
0.05kg。
S5: each chemical element reaches requirement in detection molten aluminum, controls temperature at 720-730 DEG C, and purchase is added from Changshu City
The sodium-free refining agent 1kg of Hong Jia fluorine Science and Technology Ltd. carries out refining operation.Refining agent is sprayed using powder blower when refinery process
Enter in trial furnace, discharge tube does not stop to move in trial furnace, it is ensured that cover entire molten bath.After refining, surface scum is scratched clean.
S6: magnesium ingot 0.15kg is added into the molten aluminum after refining, completely, content of magnesium reaches requirement for fusing.
S6 ': propylene oxide 5mL is added into molten aluminum, is sufficiently stirred.
S7: Al rare earth alloy (Al-RE) 0.06kg is added into molten aluminum, is mixed evenly, and be using light frequency
5.8*1014The light of Hz is irradiated 30min to molten aluminum.Later, control temperature of aluminum liquid is at 720 DEG C or so, sample of casting.
Embodiment 4
S1: feeding intake, by A00 aluminium ingot 39kg, 533 silicon materials 2.32kg (4/5 amounts of silicon materials used in entirety) and chalybeate
0.17kg is added in trial furnace, and firing up fusing, Control experiment in-furnace temperature is between 580-590 DEG C.By easy oxygen when feeding intake
Small piece material of change such as silicon, iron etc. is added in furnace bottom, and not oxidizable big part material such as A00 aluminium ingot etc. is added in top.Silicon material is added
When material, charging scffold is placed on fire door, metallic silicon is poured on charging scffold, silicon is slowly pushed into aluminum water with rake, and
It is sufficiently stirred, is completely immersed in silicon in aluminum water, molten aluminum in furnace is stirred at interval of 30min, whether confirmation metallic silicon is complete
Fusing.
S2: after the fusing of part A00 aluminium ingot, when A00 aluminium ingot is unfused complete, copper wire 0.11kg being added into trial furnace,
It is immersed in it in molten aluminum, continues heating fusing, make to test in-furnace temperature between 650-660 DEG C.
S3: residue silicon materials 0.58kg and aluminium titanium boron wire 0.05kg is added after the completion of A00 aluminium ingot all fusing in range estimation,
Maintain test in-furnace temperature at 720-730 DEG C.
S4: it is finished to all material fusing, takes molten aluminum to survey each chemical element content, and add copper wire according to testing result
0.03kg。
S5: each chemical element reaches requirement in detection molten aluminum, controls temperature at 720-730 DEG C, and purchase is added from Changshu City
The sodium-free refining agent 1kg of Hong Jia fluorine Science and Technology Ltd. carries out refining operation.Refining agent is sprayed using powder blower when refinery process
Enter in trial furnace, discharge tube does not stop to move in trial furnace, it is ensured that cover entire molten bath.After refining, surface scum is scratched clean.
S6: magnesium ingot 0.14kg is added into the molten aluminum after refining, completely, content of magnesium reaches requirement for fusing.
S7: Al rare earth alloy (Al-RE) 0.05kg is added into molten aluminum, is mixed evenly, and be using light frequency
8.7*1014The light of Hz is irradiated 30min to molten aluminum.Later, control temperature of aluminum liquid is at 730 DEG C or so, sample of casting.
Embodiment 5
S1: feeding intake, by A00 aluminium ingot 39kg, 533 silicon materials 2.32kg (4/5 amounts of silicon materials used in entirety) and chalybeate
0.17kg is added in trial furnace, and firing up fusing, Control experiment in-furnace temperature is between 640-650 DEG C.By easy oxygen when feeding intake
Small piece material of change such as silicon, iron etc. is added in furnace bottom, and not oxidizable big part material such as A00 aluminium ingot etc. is added in top.Silicon material is added
When material, charging scffold is placed on fire door, metallic silicon is poured on charging scffold, silicon is slowly pushed into aluminum water with rake, and
It is sufficiently stirred, is completely immersed in silicon in aluminum water, molten aluminum in furnace is stirred at interval of 30min, whether confirmation metallic silicon is complete
Fusing.
S2: after the fusing of part A00 aluminium ingot, when A00 aluminium ingot is unfused complete, copper wire 0.11kg being added into trial furnace,
It is immersed in it in molten aluminum, continues heating fusing, make to test in-furnace temperature between 710-720 DEG C.
S3: residue silicon materials 0.58kg and aluminium titanium boron wire 0.05kg is added after the completion of A00 aluminium ingot all fusing in range estimation,
Maintain test in-furnace temperature at 750-760 DEG C.
S4: it is finished to all material fusing, takes molten aluminum to survey each chemical element content, and add copper wire according to testing result
0.03kg。
S5: each chemical element reaches requirement in detection molten aluminum, controls temperature at 730-740 DEG C, and purchase is added from Changshu City
The sodium-free refining agent 1kg of Hong Jia fluorine Science and Technology Ltd. carries out refining operation.Refining agent is sprayed using powder blower when refinery process
Enter in trial furnace, discharge tube does not stop to move in trial furnace, it is ensured that cover entire molten bath.After refining, surface scum is scratched clean.
S6: magnesium ingot 0.14kg is added into the molten aluminum after refining, completely, content of magnesium reaches requirement for fusing.
S6 ': propylene oxide 5mL is added into molten aluminum, is sufficiently stirred.
S7: Al rare earth alloy (Al-RE) 0.05kg is added into molten aluminum, is mixed evenly, and be using light frequency
7.2*1014The light of Hz is irradiated 30min to molten aluminum.Later, control temperature of aluminum liquid is at 730 DEG C or so, sample of casting.
Detection method:
It is detected according to GB/T 20975.12-2008 " aluminium and aluminum alloy chemically analysis method " in the molten aluminum that melting is completed
Each component content.
Each embodiment of table 1 prepares chemical element content in sample and detects
Sample mechanical property is detected according to GB/T 228.1-2010 " metal material stretching test ".
Each embodiment of table 2 prepares sample mechanics properties testing
| Number | Tensile strength/MPa | Yield strength/MPa | Elongation at break/% |
| Embodiment 1 | 141.69 | 83 | 3.30 |
| Embodiment 2 | 147.68 | 98 | 2.73 |
| Embodiment 3 | 139.79 | 84 | 1.95 |
| Embodiment 4 | 138.96 | 80 | 2.07 |
| Embodiment 5 | 142.38 | 81 | 2.54 |
Test heating conduction send to survey detection certification Group Plc of China and is detected, and test temperature is at 25 DEG C
Under the conditions of carry out.
Each embodiment of table 3 prepares the detection of sample heating conduction
| Number | Density g/cm3 | Specific heat capacity J/ (G* DEG C) | Thermal diffusion coefficient mm2/s | Thermal coefficient W/ (m*k) |
| Embodiment 1 | 2.689 | 0.885 | 55.287 | 129.989 |
| Embodiment 2 | 2.697 | 0.902 | 58.055 | 143.338 |
| Embodiment 3 | 2.697 | 0.913 | 62.933 | 159.470 |
| Embodiment 4 | 2.693 | 0.894 | 58.530 | 137.452 |
| Embodiment 5 | 2.694 | 0.924 | 62.720 | 157.783 |
By above-mentioned each experimental result it is found that each chemical element content can reach and want in the molten aluminum of each embodiment preparation
Ask, the tensile strength of sample prepared by embodiment 2 and embodiment 5 is higher, the elongation at break of sample prepared by embodiment 1 compared with
It is high.For heating conduction, the thermal coefficient of sample prepared by embodiment 3 and embodiment 5 is higher, thus it is speculated that is due to embodiment
3 and embodiment 5 both handled using propylene oxide when preparing molten aluminum, while having to molten aluminum using light processing.
Claims (8)
1. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots, which comprises the following steps:
S1: A00 aluminium ingot and silicon materials are added in trial furnace, and heating fusing, temperature is between 550-650 DEG C；
S2: copper wire being added into trial furnace, continues heating fusing, temperature is between 650-720 DEG C；
S3: after the completion of A00 aluminium ingot all fusing, silicon materials and aluminium titanium boron wire is added, maintains temperature at 720-760 DEG C；
S4: it is finished to all material fusing, takes molten aluminum to survey ingredient, and add respective material according to testing result；
S5: when molten aluminum ingredient is met the requirements, temperature is controlled at 720-740 DEG C, sodium-free refining agent is added, is refined；
S6: magnesium ingot being added into molten aluminum, and content of magnesium is made to meet the requirements；
S7: Al rare earth alloy being added into molten aluminum, is mixed evenly, sample of casting.
2. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots according to claim 1, it is characterised in that: in step
Increase S6 ' between S6 and S7, propylene oxide is added into molten aluminum.
3. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots according to claim 1, it is characterised in that: in step
After Al rare earth alloy is added in S7, before sample of casting, lighting process is carried out to molten aluminum.
4. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots according to claim 3, it is characterised in that: at illumination
Light frequency used is managed in 5.8*1014-8.7*1014Hz。
5. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots according to claim 1, it is characterised in that: in molten aluminum
Chemical element content weight percent requirement in part is as follows,
6. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots according to claim 1, it is characterised in that: step S1
The silicon materials of middle addition are the 4/5 of whole silicon materials.
7. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots according to claim 1, it is characterised in that: step S3
The silicon materials of middle addition are the 1/5 of whole silicon materials.
8. a kind of preparation method for preparing high thermal conductivity aluminium alloy ingots according to claim 1, it is characterised in that: step S7
Temperature of aluminum liquid is controlled when middle casting at 710-730 DEG C.
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| CN105463269A (en) * | 2015-12-01 | 2016-04-06 | 上海交通大学 | High-strength and high-corrosion-resistance cast aluminum alloy and pressure casting preparation method thereof |
| WO2017059528A1 (en) * | 2015-10-06 | 2017-04-13 | Rio Tinto Alcan International Limited | Zinc as an additive for limiting the corrosion caused by nickel contamination in aluminum alloys |
| CN108118197A (en) * | 2017-12-22 | 2018-06-05 | 广州致远新材料科技有限公司 | A kind of preparation method of high heat conduction die-cast aluminum alloy material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017059528A1 (en) * | 2015-10-06 | 2017-04-13 | Rio Tinto Alcan International Limited | Zinc as an additive for limiting the corrosion caused by nickel contamination in aluminum alloys |
| CN105463269A (en) * | 2015-12-01 | 2016-04-06 | 上海交通大学 | High-strength and high-corrosion-resistance cast aluminum alloy and pressure casting preparation method thereof |
| CN108118197A (en) * | 2017-12-22 | 2018-06-05 | 广州致远新材料科技有限公司 | A kind of preparation method of high heat conduction die-cast aluminum alloy material |
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