CN108359853A - A kind of high heat conduction aluminium alloy and preparation method thereof - Google Patents
A kind of high heat conduction aluminium alloy and preparation method thereof Download PDFInfo
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- CN108359853A CN108359853A CN201810245158.3A CN201810245158A CN108359853A CN 108359853 A CN108359853 A CN 108359853A CN 201810245158 A CN201810245158 A CN 201810245158A CN 108359853 A CN108359853 A CN 108359853A
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- heat conduction
- high heat
- aluminium alloy
- alloy
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- 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
- C22F1/04—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
Abstract
A kind of high heat conduction aluminium alloy provided by the invention and preparation method thereof, the die casting aluminium silicon magnesium ferromanganese material prepared using die-casting technique and aging treatment process are by mass percentage at being grouped as：Silicon 5~10%, iron 0.5~1%, magnesium 0.1~0.60%, manganese 0.10~0.40%, zinc≤0.5%, copper≤0.4%, other elements≤0.30%, remaining as aluminium and inevitable trace impurity.To not only have higher heat conductivility, good mechanical property, and casting forming performance is good, and raw material cost is low, convenient sources；Especially suitable for manufacturing the part required with lightweight and high heat conduction, there is very wide application prospect in the fields such as communication, household electrical appliances.
Description
Technical field
The present invention relates to aluminum alloy materials fields, specifically, be a kind of high heat conduction aluminium alloy suitable for casting forming and
Preparation method.
Background technology
The development of electronic technology is maked rapid progress, and the demand for communicating type of electrical component also increasingly increases severely, such as communication radio-frequency module,
Wireless transport module, based on composite requests such as weight, manufacturing cost, heat conduction, these components are usually using aluminium alloy element.With
The calorific value of the more sophisticated of integrated circuit, electronic product is increasing, and temperature is excessively high to cause the operation of these electronic products slow
Slowly, power consumption increases, therefore requires the heat dissipation performance of these aluminium alloy elements also higher and higher.
The common processing method of these components is in early days：Using aluminum alloy blank, by mechanical processing (such as vehicle, milling, brill,
Mill etc.) reach required shape and size, the certain function admirable of cavity of this technique productions, but spillage of material is big, resource
Waste is serious, and the process-cycle is long, and energy consumption is big, of high cost and not environmentally.Die casting is current main aluminium alloy shape casting
Technique, production efficiency is high, can use secondary alloy, therefore, communication class aluminium alloy element gradually adopts die-casting process to produce.
Although improving production efficiency, the stock utilization of these components using pack alloy forming, manufacture is reduced
Cost, however, to ensure that the mobility of casting forming, common pack alloy often contains more Si elements, for example,
Most common ADC12 contains 9.5~11.5%Si, and AC-AlSi12Fe aluminium alloys contain 10.5~13.5%Si, since lattice is abnormal
Become and larger resistance is generated to the movement of free electron, causes the thermal conductivity of Aluminium Alloys in Common Use not high, ADC12 and AC-
AlSi12Fe pack alloys thermal coefficient only has 96W/mK and 110W/mK respectively so that these component heat dissipation performances reduce.
In metal material, playing conductive force main, there are two parts：One is free electron, after electronics is heated, fortune
Dynamic speed is accelerated, and does random Brownian movement, and which part thermoelectron can make cold electronics with cold electron collision positive energy exchange
Also make high-speed motion, constantly repeat, heat is just passed to and come, and free electron is more, and the scattering being subject to is fewer, and mean free path is just
Longer, the thermal conductivity of metal is better；The second is lattice shakes, metal material atomic kernel (atomic nucleus+inner electron) is although nothing
Method free movement, but the vibration of rule is done centered on its lattice point by lattice.And the vibration of an atomic kernel, it can drive adjacent
Atomic kernel do similar movement, by transmitting, the atomic kernel of entire lattice is all vibrated doing, and the collective formed similar to wave shakes
It moves, referred to as lattice wave, temperature is higher, and atomic kernel vibration is more violent.The atomic kernel vibration velocity of high-temperature region is very fast, drives low-temperature space
Atomic kernel is vibrated, and so that the vibration of low-temperature space atomic kernel is accelerated, temperature is just spread.When introducing other alloying elements in simple metal
Afterwards, defect is will produce, the vibration of free movement and lattice to electronics generates obstruction, can substantially reduce the thermal conductivity of alloy.
Invention content
The main purpose of the present invention is to provide a kind of high heat conduction aluminium alloys and preparation method thereof, not for the prior art
Foot develops that a kind of heat conductivility is excellent and the aluminium of casting forming is closed by optimization design alloying component and its preparation process
Golden material.
To achieve the above objectives, the technical solution adopted by the present invention is a kind of high heat conduction aluminium alloy, at being grouped as by matter
Amount percentage is calculated as：Silicon 5~10%, iron 0.5~1%, magnesium 0.1~0.60%, manganese 0.10~0.40%, zinc≤0.5%, copper≤
0.4%, other elements≤0.30%, remaining as aluminium and inevitable trace impurity.
Preferably, silicone content is 7.50%~9.00%, and alloy melting temp is 720~730 DEG C, and viscosity is low, still has
There is good mobility, can be used for casting forming.
Preferably, iron content is 0.70%~0.80%, and manganese content is 0.20%~0.28%, ensure that die casting demoulds,
Also by iron and manganese element appropriate proportioning, gill shape β-Fe phases are reduced.
Preferably, Zn content≤0.25%, copper content≤0.20%, other elements≤0.30%, remaining as aluminium and can not
The trace impurity avoided.
An embodiment according to the present invention, the raw material of the high heat conduction aluminium alloy by 65%~92% 356 foundry returns,
8%~35% ZL102 and 0.5%~2% AlFe20 are formulated.
A kind of preparation method of high heat conduction aluminium alloy comprising step：
356 foundry returns, ZL102 and AlFe20 alloys are added in melting furnace, is warming up to 720 DEG C, waits for alloy for S100 meltings
It is stirred after all melting, refining agent refining is added, molten alloy is made；
S200 die casting, by the molten alloy to component casting forming, 130 DEG C of mold preheating temperature on cold-chamber die casting machine
~180 DEG C, alloy pouring temperature is 640~700 DEG C, injection high speed 2~4m/s of speed, 75~95MPa of boost pressure, and chamber is made
Body die casting；
S300 is heat-treated, and the cavity die casting is carried out ageing treatment in resistance furnace, and heat treatment process is 140~
Timeliness 1~4 hour at 180 DEG C, comes out of the stove air-cooled, and the high heat conduction aluminium alloy is made.
An embodiment according to the present invention, the step S100 includes step：65%~92% is added in melting furnace
356 foundry returns, 8%~35% the AlFe20 alloys of ZL102 and 0.5%~2% be warming up to heating up per hour 150 DEG C
720 DEG C, 3min is stirred after alloy all melts, in molten aluminum intermediate transition packet, is added into molten aluminum according to 4/1000ths ratio
Enter refining agent, refined at 720~730 DEG C, high-purity argon gas degasification is used in combination, skims, stands 10min.
An embodiment according to the present invention, the preparation method further comprise step S400：Dispensing, described 356 melt down
Expect that each component content of alloy is calculated as 7%~8% silicon, 0.5%~0.6% iron, 0.2%~0.25% by percentage
Copper, 0.3%~0.5% magnesium, 0.25%~0.35% manganese, 0.25%~0.35% zinc, remaining is aluminium；The ZL102
The each component content of alloy is calculated as 12%~13% silicon, 0.1%~0.5% iron by percentage, remaining is aluminium；It is described
The each component content of AlFe20 alloys is calculated as 20% iron by percentage, remaining is aluminium.
Preferably, the aging temperature of the step S300 is 150~170 DEG C, and the time is 2~3 hours.
The present invention compared with the existing technology, has the following advantages and beneficial effect：
(1) preparation of the high heat conduction aluminium alloy using secondary alloy or recycling aluminium alloy form, raw material cost is low and
Environmental protection, convenient sources；
(2) in order to improve the thermal conductivity of pack alloy, it is necessary to which the appropriate solid solubility for reducing alloy matrix aluminum passes through timeliness
Processing makes the alloying element of addition be precipitated, and forms intermetallic compound disperse in aluminum substrate, matrix α-Al performances and fine aluminium
Similar, lattice is relatively regular, is reduced to the scattering process of free electron, thus thermal conductivity and conductivity are higher；
(2) in order to ensure the good mobility of die casting and formability, the element silicon that certain content is added is needed, due to silicon member
Plain brittleness is larger, is suitably added magnesium elements, forms Al and Mg2Low-alloyed brittleness drops in Si eutectics；Zn-ef ficiency can improve alloy
The capacity of heat transmission, and recycle aluminium waste usually contain certain Zn-ef ficiency, recycled；
(3) ferro element often generates coarse gill shape β-Fe phases in AlSi systems alloy, is considered as impurity element, but
It is that the Copper component of disperse can improve the mechanical property of alloy, in order to reduce β-Fe phases, needs to control iron content, simultaneously
A small amount of manganese element is added, forms the AlFeMnSi phases of Chinese character shape with part ferro element, and certain iron and manganese element content can subtract
Few corrosion of the aluminium alloy to die casting, ensure that the demoulding of die casting；
(4) the high heat conduction aluminium alloy not only has higher heat conductivility, good mechanical property, and casting forming
Can be good, raw material cost is low, convenient sources, especially suitable for manufacturing the part required with lightweight and high heat conduction, communication,
There is very wide application prospect in the fields such as household electrical appliances.
Specific implementation mode
It is described below for disclosing the present invention so that those skilled in the art can realize the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
Embodiment 1
A kind of preparation method of high heat conduction aluminium alloy, including step：
(1) dispensing
(2) melting
356 foundry returns, ZL102 and AlFe20 alloys are added in melting furnace, then heats up 150 DEG C, is warming up to per hour
720 DEG C, 3min is stirred after alloy all melts.In molten aluminum intermediate transition packet, add into molten aluminum according to 4/1000ths ratio
Enter commercial solid refined agent, refined at 720~730 DEG C, high-purity argon gas degasification is used in combination, skims, stands 10min.
(3) die casting
Using the alloy of institute's melting, to household electrical appliances component forming on 1250 tons of cold-chamber die casting machines, casting dimension is 320 ×
290 × 120mm, 150 DEG C of mold preheating temperature, alloy pouring temperature are 660 DEG C, injection high speed speed 3.0m/s, boost pressure
85MPa。
(4) it is heat-treated
Communication cavity die casting is subjected to ageing treatment in resistance furnace, heat treatment process is timeliness 3 hours at 150 DEG C,
It comes out of the stove air-cooled.
The alloy material obtained through the above steps contains silicon 7.52%, iron 0.80%, magnesium 0.39%, manganese 0.28%, copper
0.19%, zinc 0.23%, remaining is aluminium and inevitable impurity.Mechanical property after die casting as cast condition and aging strengthening model and
Heat conductivility is as shown in table 1.
The mechanical property and heat conductivility of 1 alloy of the present invention of table
Embodiment 2
A kind of preparation method of high heat conduction aluminium alloy comprising step：
(1) dispensing
(2) melting
356 foundry returns, ZL102 and AlFe20 alloys are added in melting furnace, then heats up 150 DEG C, is warming up to per hour
720 DEG C, 3min is stirred after alloy all melts.In molten aluminum intermediate transition packet, add into molten aluminum according to 4/1000ths ratio
Enter commercial solid refined agent, refined at 720~730 DEG C, high-purity argon gas degasification is used in combination, skims, stands 10min.
(3) die casting
Using the alloy of institute's melting, on 1600 tons of cold-chamber die casting machines to communicate component forming, casting dimension be 410 ×
320 × 142mm, 160 DEG C of mold preheating temperature, alloy pouring temperature are 680 DEG C, injection high speed speed 3.6m/s, boost pressure
90MPa。
(4) it is heat-treated
Communication cavity die casting is subjected to ageing treatment in resistance furnace, heat treatment process is timeliness 2 hours at 170 DEG C,
It comes out of the stove air-cooled.
The alloy material obtained through the above steps contains silicon 8.90%, iron 0.65%, magnesium 0.25%, manganese 0.20%, copper
0.14%, zinc 0.21%, remaining is aluminium and inevitable impurity.Mechanical property after die casting as cast condition and aging strengthening model and
Heat conductivility is as shown in table 2.
The mechanical property and heat conductivility of 2 alloy of the present invention of table
Embodiment 3 is to embodiment 9
The preparation method is the same as that of Example 1 for high heat conduction aluminium alloy in embodiment 3~9, the difference is that ageing treatment
Time is different, and aging time is respectively 0.5 hour, 1 hour, 2 hours, 2.5 hours, 3.5 hours, 4 hours, 5 hours,
The die casting of embodiment 3~9 and the performance test results of ageing treatment are shown in Table 3.
The performance test results of 3 embodiment 3~9 of table
Embodiment 10 to implement 16
The preparation method is the same as that of Example 1 for high heat conduction aluminium alloy in embodiment 10~16, the difference is that ageing treatment
Temperature it is different, aging temperature is respectively 120 DEG C, 140 DEG C, 155 DEG C, 160 DEG C, 170 DEG C, 180 DEG C, 200 DEG C, is implemented
The die casting of example 10~16 and the performance test results of ageing treatment are shown in Table 4.
The performance test results of 4 embodiment 10~16 of table
Embodiment 17 is to embodiment 24
The preparation method is the same as that of Example 1 for the aluminium alloy of embodiment 17~24, the difference is that dispensing component is different, is made
Aluminum alloy materials in iron, manganese constituent content it is different, iron, manganese constituent content and its performance test results of embodiment 17~24
As shown in table 5.
The constituent content and performance test results of 5 embodiment 17~24 of table
| Example 17 | Example 18 | Example 19 | Example 20 | Example 21 | Example 22 | Example 23 | Example 24 | |
| Iron content % | 0.5 | 0.6 | 0.7 | 0.9 | 1.2 | 0.8 | 0.8 | 0.8 |
| Manganese content % | 0.28 | 0.28 | 0.28 | 0.28 | 0.4 | 0.1 | 0.2 | 0.4 |
| Tensile strength, MPa | 255 | 263 | 268 | 270 | 264 | 263 | 267 | 268 |
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection domain by appended claims and its
Equivalent defines.
Claims (10)
1. a kind of high heat conduction aluminium alloy, which is characterized in that it is by mass percentage at being grouped as：Silicon 5~10%, iron 0.5
~1%, magnesium 0.1~0.60%, manganese 0.10~0.40%, zinc≤0.5%, copper≤0.4%, other elements≤0.30%, residue
For aluminium and inevitable trace impurity.
2. high heat conduction aluminium alloy according to claim 1, which is characterized in that silicone content is 7.50%~9.00%.
3. high heat conduction aluminium alloy according to claim 2, which is characterized in that iron content is 0.70%~0.80%, and manganese contains
Amount is 0.20%~0.28%.
4. high heat conduction aluminium alloy according to claim 3, which is characterized in that Zn content≤0.25%, copper content≤
0.20%.
5. high heat conduction aluminium alloy according to any one of claims 1 to 4, which is characterized in that its raw material is by 65%~92%
356 foundry returns, 8%~35% ZL102 and 0.5%~2% AlFe20 be formulated.
6. a kind of preparation method of high heat conduction aluminium alloy as claimed in claim 5, which is characterized in that including step：
356 foundry returns, ZL102 and AlFe20 alloys are added in melting furnace, is warming up to 720 DEG C for S100 meltings, wait for alloy whole
It is stirred after thawing, refining agent refining is added, molten alloy is made；
S200 die casting, by the molten alloy to component casting forming on cold-chamber die casting machine, 130 DEG C of mold preheating temperature~
180 DEG C, alloy pouring temperature is 640~700 DEG C, injection high speed 2~4m/s of speed, 75~95MPa of boost pressure, and cavity is made
Die casting；
S300 is heat-treated, and the cavity die casting is carried out ageing treatment in resistance furnace, heat treatment process is 140~180 DEG C
Lower timeliness 1~4 hour, comes out of the stove air-cooled, and the high heat conduction aluminium alloy is made.
7. the preparation method of high heat conduction aluminium alloy according to claim 6, which is characterized in that the step S100 includes step
Suddenly：65%~92% 356 foundry returns are added in melting furnace, the AlFe20 of 8%~35% ZL102 and 0.5%~2% is closed
Gold is warming up to 720 DEG C to heat up per hour 150 DEG C, stirs 3min after alloy all melts, in molten aluminum intermediate transition packet, presses
Refining agent is added into molten aluminum according to 4/1000ths ratio, is refined at 720~730 DEG C, high-purity argon gas degasification is used in combination, skims,
Stand 10min.
8. the preparation method of high heat conduction aluminium alloy according to claim 7, which is characterized in that the preparation method is further
Including step S400：Dispensing, each component content of the 356 foundry returns alloy be calculated as by percentage 7%~8% silicon, 0.5%
~0.6% iron, 0.2%~0.25% copper, 0.3%~0.5% magnesium, 0.25%~0.35% manganese, 0.25%~
0.35% zinc, remaining is aluminium；The each component content of the ZL 102 alloy be calculated as by percentage 12%~13% silicon, 0.1%
~0.5% iron, remaining is aluminium；The each component content of the AlFe20 alloys is calculated as 20% iron by percentage, remaining is aluminium.
9. the preparation method of high heat conduction aluminium alloy according to claim 6, which is characterized in that the timeliness of the step S300
Treatment temperature is 150~170 DEG C, and the time is 2~3 hours.
10. the preparation method of high heat conduction aluminium alloy according to claim 8, which is characterized in that the step S300 when
It is 150~170 DEG C to imitate treatment temperature, and the time is 2~3 hours.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108913962A (en) * | 2018-09-27 | 2018-11-30 | 山西瑞格金属新材料有限公司 | A kind of die casting high thermal conductivity aluminium alloy and its heat treatment method |
| CN108950323A (en) * | 2018-08-15 | 2018-12-07 | 深圳市欣茂鑫实业有限公司 | A kind of high thermal conductivity cast aluminium alloy gold |
| CN109332631A (en) * | 2018-11-02 | 2019-02-15 | 广东鸿图科技股份有限公司 | A kind of communication box body hypothermia die-casting process |
| CN110184510A (en) * | 2019-07-12 | 2019-08-30 | 华劲新材料研究院(广州)有限公司 | A kind of novel high thermal conductivity aluminum alloy materials |
| CN110527870A (en) * | 2019-09-18 | 2019-12-03 | 江苏集萃精凯高端装备技术有限公司 | A kind of high thermal conductivity cast aluminium alloy gold and preparation method thereof containing Mn-Fe-Cu |
| CN113005339A (en) * | 2021-01-19 | 2021-06-22 | 浙江荣荣实业有限公司 | Die-casting radiator aluminum alloy material and preparation method thereof |
| CN114457263A (en) * | 2021-07-30 | 2022-05-10 | 深圳市鑫申新材料科技有限公司 | High-strength high-toughness high-heat-conductivity die-casting aluminum alloy and manufacturing method thereof |
| CN115595475A (en) * | 2022-10-21 | 2023-01-13 | 无锡贺邦金属制品有限公司（Cn） | Preparation method of die-casting aluminum alloy with improved yield strength |
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| CN105256185A (en) * | 2015-11-11 | 2016-01-20 | 天津爱田汽车部件有限公司 | Cast aluminum alloy high in thermal conductivity |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950323A (en) * | 2018-08-15 | 2018-12-07 | 深圳市欣茂鑫实业有限公司 | A kind of high thermal conductivity cast aluminium alloy gold |
| CN108913962A (en) * | 2018-09-27 | 2018-11-30 | 山西瑞格金属新材料有限公司 | A kind of die casting high thermal conductivity aluminium alloy and its heat treatment method |
| CN109332631A (en) * | 2018-11-02 | 2019-02-15 | 广东鸿图科技股份有限公司 | A kind of communication box body hypothermia die-casting process |
| CN110184510A (en) * | 2019-07-12 | 2019-08-30 | 华劲新材料研究院(广州)有限公司 | A kind of novel high thermal conductivity aluminum alloy materials |
| CN110527870A (en) * | 2019-09-18 | 2019-12-03 | 江苏集萃精凯高端装备技术有限公司 | A kind of high thermal conductivity cast aluminium alloy gold and preparation method thereof containing Mn-Fe-Cu |
| CN113005339A (en) * | 2021-01-19 | 2021-06-22 | 浙江荣荣实业有限公司 | Die-casting radiator aluminum alloy material and preparation method thereof |
| CN114457263A (en) * | 2021-07-30 | 2022-05-10 | 深圳市鑫申新材料科技有限公司 | High-strength high-toughness high-heat-conductivity die-casting aluminum alloy and manufacturing method thereof |
| CN114457263B (en) * | 2021-07-30 | 2022-07-15 | 深圳市鑫申新材料科技有限公司 | High-strength high-toughness high-heat-conductivity die-casting aluminum alloy and manufacturing method thereof |
| CN115595475A (en) * | 2022-10-21 | 2023-01-13 | 无锡贺邦金属制品有限公司（Cn） | Preparation method of die-casting aluminum alloy with improved yield strength |
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Application publication date: 20180803 |