CN108941197B - Preparation method of high-thermal-conductivity aluminum-silicon alloy plate - Google Patents
Preparation method of high-thermal-conductivity aluminum-silicon alloy plate Download PDFInfo
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- CN108941197B CN108941197B CN201810732823.1A CN201810732823A CN108941197B CN 108941197 B CN108941197 B CN 108941197B CN 201810732823 A CN201810732823 A CN 201810732823A CN 108941197 B CN108941197 B CN 108941197B
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- 229910000676 Si alloy Inorganic materials 0.000 title claims abstract description 26
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 35
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000000265 homogenisation Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 19
- 230000032683 aging Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 10
- 230000000171 quenching effect Effects 0.000 claims description 10
- 239000006104 solid solution Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 17
- 238000012360 testing method Methods 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 229910018125 Al-Si Inorganic materials 0.000 description 3
- 229910018520 Al—Si Inorganic materials 0.000 description 3
- 239000010953 base metal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Conductive Materials (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a preparation method of a high-thermal-conductivity aluminum-silicon alloy plate, which comprises the following steps: (1) taking an Al-Si alloy ingot, and cleaning/washing the surface of an aluminum ingot sample after the upper surface and the lower surface of the Al-Si alloy ingot are milled flat; (2) placing the Al-Si alloy ingot treated in the step (1) into a heat treatment furnace for homogenization treatment; (3) placing the cooled cast ingot into a heat treatment furnace for pre-heating treatment before rolling; (4) rolling the ingot uniformly heated in the step (3) until the total pressing amount is 75%; (5) and after the rolling is finished, placing the Al-Si alloy plate obtained by rolling again in a heat treatment furnace for T6 heat treatment. The high-thermal-conductivity alloy has the advantages of high thermal conductivity coefficient, good mechanical property, excellent machining performance, reliable principle of the preparation method, simple and convenient operation, low production cost and the like, is very suitable for radiator components in various fields, and has wide market application prospect.
Description
Technical Field
The invention relates to a preparation method of a high-thermal-conductivity aluminum-silicon alloy plate, in particular to a preparation method for rolling a traditional cast aluminum-silicon alloy into a plate and improving the thermal conductivity of the plate, and belongs to the field of preparation methods of materials.
Background
At present, the radiating fin of the heat exchanger made of aluminum alloy mainly adopts series of wrought aluminum alloy materials such as 1XXX, 3XXX and the like, or directly adopts cast Al-Si aluminum alloy for production and forming, although the 1 series and 3 series of wrought aluminum alloys have good radiating effect, the mechanical property of the materials is general, so that deformation is generated or corrosion is generated in the using process to form through holes, and the radiating fin is invalid; the heat conductivity coefficient of the cast Al-Si aluminum alloy with good mechanical property is only about 80-100W/m.K, the heat dissipation effect is not ideal, and components needing heat dissipation can be influenced by overheating and even scrapped. The invention utilizes the excellent mechanics of the cast Al-Si aluminum alloy, and leads the material to generate plastic deformation by a rolling method on the premise of simultaneously improving the mechanical property of the material so as to greatly improve the thermal conductivity of the Al-Si alloy, thereby providing the preparation method of the high-thermal-conductivity aluminum-silicon alloy plate.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for preparing a high thermal conductivity aluminum-silicon alloy sheet, which has good mechanical properties, a high thermal conductivity coefficient, and a high productivity.
The invention adopts the following specific technical scheme for realizing the purpose:
a preparation method of a high-thermal-conductivity aluminum-silicon alloy plate comprises the following steps:
(1) taking an Al-Si alloy ingot to be rolled, milling the upper surface and the lower surface, cleaning and polishing the surface of the Al-Si alloy ingot;
(2) placing the Al-Si alloy ingot treated in the step (1) into a heat treatment furnace for homogenization treatment;
(3) placing the Al-Si alloy ingot treated in the step (2) into a heat treatment furnace for pre-heat treatment before rolling;
(4) rolling the alloy ingot uniformly heated in the step (3) by adopting a double-rolling mill;
(5) and after the rolling is finished, placing the Al-Si alloy plate obtained by rolling again in a heat treatment furnace for T6 treatment.
Based on the above technical solution, the following preferred modes or parameters can be specifically adopted in each step.
Preferably, the Al — Si alloy in the step (1) is an Al — Si alloy for casting, and the alloy state is a cast state.
Preferably, in the step (1), the surface of the Al — Si alloy ingot is polished with 180-mesh emery paper.
Preferably, the Al — Si alloy ingot in the step (1) is an Al — Si alloy for casting, and the alloy state is a cast state.
Preferably, the surface of the Al — Si alloy ingot in the step (1) is formed by milling.
Preferably, the thickness of the Al-Si alloy ingot in the step (1) is 10 mm.
Preferably, the soaking temperature of the homogenization treatment in the step (2) is 500-520 ℃, the soaking time is 12-18h, and the cooling mode is air cooling.
Preferably, the heating temperature of the preheating treatment in the step (3) is 480-.
Preferably, the rolling passes in the rolling process of the step (4) are 5 to 6 times, and the total rolling reduction is 75 to 85 percent.
Preferably, in the T6 treatment in the step (5), the solid solution temperature is 510 ℃ and 530 ℃, the solid solution time is 6-8h, the aging temperature is 160 ℃ and 180 ℃, the aging time is 6-8h, and then the mixture is cooled in the air.
Preferably, in the T6 treatment in the step (5), the steel sheet is quenched by water quenching after completion of solid solution, and the temperature of water for quenching is 60 to 80 ℃.
Another object of the present invention is to provide an aluminum-silicon alloy sheet material with a high thermal conductivity prepared by the method according to any of the above aspects.
Compared with the prior art, the invention has the advantages that: the high-thermal-conductivity aluminum-silicon alloy plate prepared by the method has high thermal conductivity and good mechanical property, the comprehensive properties of the rolled material exceed those of the parent metal, and the preparation method is reliable in principle, simple and convenient to operate, very suitable for mass production and wide in market application prospect.
Detailed Description
The invention is further illustrated below with reference to examples and comparative examples.
Example 1
In this embodiment, the preparation method of the high thermal conductivity aluminum alloy is as follows: preparing an ADC12 alloy cast ingot with the size of 200mm (length) multiplied by 90mm (width) multiplied by 10mm (height), obtaining the alloy cast ingot by a casting mode, milling and flattening the upper surface and the lower surface of the alloy cast ingot, cleaning and washing the surface of the alloy cast ingot, and then polishing the surface of the cast ingot by 180-mesh carborundum paper. Placing the ADC12 alloy ingot into a box-type heat treatment furnace for homogenization treatment, wherein the homogenization treatment temperature is 510 ℃, the homogenization treatment time is 16h, and then taking out the ingot from the heat treatment furnace and placing the ingot in air for cooling. And (3) putting the cooled ADC12 alloy cast ingot into a box type heat treatment furnace again for preheating treatment, wherein the heating temperature of the preheating treatment is 500 ℃, and the heat preservation time is 1 h. And after the preheating treatment is finished, taking the ADC12 alloy cast ingot out of the box type heat treatment furnace, and directly rolling. And (3) rolling by adopting a double-rolling mill, wherein the rolling pass is 5 times, and the total pressing amount is 75%. After rolling, the obtained ADC12 alloy plate is placed into a box type heat treatment furnace again for T6 treatment (solid solution and aging), the solid solution temperature is 530 ℃, the solid solution time is 8 hours, quenching is carried out in a water quenching mode after solid solution is completed, the water temperature for quenching is 70 ℃, aging treatment is carried out after quenching is completed, the aging temperature is 180 ℃, the aging time is 8 hours, and after aging is completed, the plate is placed in air for cooling. And cooling to obtain the final aluminum-silicon alloy plate product.
The aluminum-silicon alloy plate obtained by the method and the original parent metal are respectively subjected to mechanical property test, and the ultimate tensile strength is 300MPa and the elongation is 10 percent. The base material ADC12 alloy ingot has an ultimate tensile strength of 220MPa and an elongation of 1.0%.
Further, the aluminum-silicon alloy plate obtained by the method and the original base metal are respectively subjected to heat conduction performance tests, and the heat conduction coefficient of the aluminum-silicon alloy plate is 150 (W/m.K), and the heat conduction coefficient of the base metal ADC12 alloy ingot is 97 (W/m.K).
Compared with the base metal, the heat-conducting property of the aluminum-silicon alloy plate prepared by the embodiment of the invention is improved by 53.6 percent, the limited tensile strength is improved by 36.36 percent, and the elongation is improved by 9 times.
Comparative example 1
This comparative example was rolled using an ADC12 alloy ingot of the same size as example 1. Compared with the example, the treatment process of the alloy ingot in the comparative example is only different in that homogenization treatment is not carried out before rolling, the polished ADC12 alloy ingot is directly subjected to preheating treatment and then is rolled, and T6 treatment is carried out after rolling is finished. The process parameters of preheating treatment, rolling and T6 treatment are consistent and unchanged relative to example 1. The aluminum-silicon alloy plate obtained by the method is respectively subjected to mechanical property test and heat conductivity test, and the ultimate tensile strength of the aluminum-silicon alloy plate is 268MPa, the elongation is 6.2 percent, and the heat conductivity coefficient is 127 (W/m.K).
Comparative example 2
This comparative example was rolled using an ADC12 alloy ingot of the same size as example 1. The treatment of the alloy ingot in this comparative example was compared with the examples except that the T6 treatment was not performed after the rolling was completed. The process parameters of homogenization treatment, preheating treatment and rolling are kept consistent with those of the embodiment 1 and are not changed. The aluminum-silicon alloy plate obtained by the method is respectively subjected to mechanical property test and heat conductivity test, and the ultimate tensile strength of the aluminum-silicon alloy plate is 237MPa, the elongation is 6.6 percent, and the heat conductivity coefficient is 129 (W/m.K).
Comparative example 3
This comparative example was rolled using an ADC12 alloy ingot of the same size as example 1. Compared with the example, the treatment process of the alloy ingot in the comparative example is only different in that homogenization treatment is not performed before rolling, the polished ADC12 alloy ingot is directly subjected to preheating treatment and then is rolled, and T6 treatment is not performed after rolling is completed. The technological parameters of the preheating treatment and the rolling are kept consistent with those of the example 1 and are not changed. The aluminum-silicon alloy sheet material obtained by the method is respectively subjected to mechanical property test and heat conductivity test, and the ultimate tensile strength of the aluminum-silicon alloy sheet material is 197MPa, the elongation is 3.3 percent, and the heat conductivity coefficient is 149 (W/m.K).
Comparative example 4
In the comparative example, the ADC12 alloy ingot which is completely the same as the ADC12 alloy ingot in the example 1 is directly used for the T6 treatment, an intermediate treatment procedure is not carried out, and the process parameters of the T6 treatment are consistent relative to the process parameters in the example 1 and are not changed. The aluminum-silicon alloy obtained by the method is respectively subjected to mechanical property test and heat conductivity test, and the obtained aluminum-silicon alloy plate has the ultimate tensile strength of 247MPa, the elongation of 1.9 percent and the heat conductivity coefficient of 119 (W/m.K).
In contrast, the product made using the examples of the present invention was compared with the product made using the comparative example: compared with comparative example 1, the heat conductivity coefficient is improved by 18.11%, the ultimate tensile strength is improved by 11.94%, and the elongation is improved by 61.29%; compared with the comparative example 2, the heat conductivity coefficient is improved by 16.28 percent, the ultimate tensile strength is improved by 26.58 percent, and the elongation is improved by 51.5 percent; compared with the comparative example 3, the heat conductivity coefficient is improved by 0.67%, the ultimate tensile strength is improved by 52.28%, and the elongation is improved by 2 times; compared with comparative example 4, the thermal conductivity is improved by 26.05%, the ultimate tensile strength is improved by 21.45%, and the elongation is improved by 4 times.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (2)
1. The preparation method of the high-thermal-conductivity aluminum-silicon alloy plate is characterized by comprising the following steps of:
taking an ADC12 alloy cast ingot with the size of 200mm multiplied by 90mm multiplied by 10mm, obtaining the alloy cast ingot by a casting mode, milling and flattening the upper surface and the lower surface of the alloy cast ingot, cleaning and washing the surface of the alloy cast ingot, and then polishing the surface of the cast ingot by 180-mesh carborundum paper; placing the ADC12 alloy ingot into a box-type heat treatment furnace for homogenization treatment, wherein the homogenization treatment temperature is 510 ℃, the homogenization treatment time is 16h, and then taking out the alloy ingot from the heat treatment furnace and placing the alloy ingot into air for cooling; the cooled ADC12 alloy cast ingot is placed into a box type heat treatment furnace again for preheating treatment, the heating temperature of the preheating treatment is 500 ℃, and the heat preservation time is 1 h; taking the ADC12 alloy cast ingot out of the box-type heat treatment furnace after the preheating treatment is finished, and directly rolling; rolling by a double-rolling mill for 5 times, wherein the total pressing amount is 75%; after rolling, placing the obtained ADC12 alloy plate into a box-type heat treatment furnace again for T6 treatment, wherein the solid solution temperature is 530 ℃, the solid solution time is 8h, quenching is carried out in a water quenching mode after solid solution is finished, the water temperature for quenching is 70 ℃, aging treatment is carried out after quenching is finished, the aging temperature is 180 ℃, the aging time is 8h, and after aging is finished, the plate is placed in the air for cooling; and cooling to obtain the high-heat-conductivity aluminum-silicon alloy plate.
2. A high thermal conductivity aluminum-silicon alloy sheet material prepared by the method of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810732823.1A CN108941197B (en) | 2018-07-05 | 2018-07-05 | Preparation method of high-thermal-conductivity aluminum-silicon alloy plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810732823.1A CN108941197B (en) | 2018-07-05 | 2018-07-05 | Preparation method of high-thermal-conductivity aluminum-silicon alloy plate |
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| CN108941197B true CN108941197B (en) | 2020-04-03 |
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| CN112157122A (en) * | 2020-11-10 | 2021-01-01 | 贵州大学 | Cryogenic processing method for improving strength and plasticity of 3003 aluminum alloy plate |
| CN115198212A (en) * | 2022-07-18 | 2022-10-18 | 哈尔滨理工大学 | High-thermal-conductivity aluminum-silicon alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103725933A (en) * | 2013-12-17 | 2014-04-16 | 芜湖万润机械有限责任公司 | Preparation method of aluminium alloy section for diesel engine piston |
| CN107492794A (en) * | 2017-08-31 | 2017-12-19 | 国网河南省电力公司西峡县供电公司 | One kind sealing heat-conducting type outdoor power cabinet |
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| JP5925667B2 (en) * | 2012-11-19 | 2016-05-25 | 株式会社神戸製鋼所 | Aluminum alloy material for high-pressure hydrogen gas container and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103725933A (en) * | 2013-12-17 | 2014-04-16 | 芜湖万润机械有限责任公司 | Preparation method of aluminium alloy section for diesel engine piston |
| CN107492794A (en) * | 2017-08-31 | 2017-12-19 | 国网河南省电力公司西峡县供电公司 | One kind sealing heat-conducting type outdoor power cabinet |
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