CN108193105A - A kind of high heat conduction die-cast aluminum alloy material and preparation method thereof - Google Patents
A kind of high heat conduction die-cast aluminum alloy material and preparation method thereof Download PDFInfo
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- CN108193105A CN108193105A CN201810121048.6A CN201810121048A CN108193105A CN 108193105 A CN108193105 A CN 108193105A CN 201810121048 A CN201810121048 A CN 201810121048A CN 108193105 A CN108193105 A CN 108193105A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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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
- C22C1/026—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
Abstract
A kind of high heat conduction die-cast aluminum alloy material, which is characterized in that including following components in percent by weight：Zn 2.0 ~ 5.0%, Fe 0.5 ~ 1.3%, surplus are Al and impurity element.The present invention provides a kind of aluminium diecasting alloy material that not only can guarantee good forming property but also had both excellent heat conducting performance, pass through scientific and reasonable design of alloy, the seldom alloying element of commercial Application even thulium need not be added, also it need not increase any heat treatment procedure, can realize that heat conductivility pack alloy more conventional than ADC12 etc. increases substantially.
Description
Technical field
The invention belongs to nonferrous materials and its molding field is prepared, is related to that a kind of forming property is good and thermal conductivity
Die-cast aluminum alloy material that can be excellent and preparation method thereof.
Technical background
Pack alloy is widely used in fields such as communication, electronics and communications and transportation, mainly for the production of thin-wall case zero
Part.In mobile communications industry, the parts such as casing have both heat sinking function, complex-shaped.Aluminium alloy is used with die-casting process
These complexity heat dissipation parts are produced, have many advantages, such as that formability is good, production cost is low, production efficiency is high.But as communication is gone
Industry will stride forward 5G epoch and Related product miniaturization, integrated development trend, and how in a limited space interior progress is high
Effect heat dissipation ensures the reliability of component and communication equipment, becomes the critical issue of presently relevant product design.With communication base station
Wireless radio remote unit system for, design of material proportion shared in the thermal design of whole system is set with radiator structure
Meter is suitable.Therefore, traditional pack alloy is replaced to produce communication apparatus radiating part using the higher aluminum alloy materials of heat conductivility
Part will become the trend of the entire communications industry.
For communication apparatus housing component because of the needs of heat dissipation, usual structure design is complex, with increasing heat radiation area, improves
Radiating efficiency.At present, cocrystallizing type or nearly cocrystallizing type alusil alloy are most important pack alloys, such as YL113, YL112,
YL101 and YL102 (national standard GB/T 15115-2009).Wherein YL113 (is equivalent to Japanese JIS H5302：In 2006 standards
ADC12 alloys) dosage is maximum, purposes also the most extensively.The thermal conductivity of conventional pack alloy is generally at 90~110W/ (mK)
Between, typical ADC12 alloy die casts state thermal conductivity is about 92W/ (mK).It is limited by material property and preparation process,
Common pack alloy material casing has been unable to meet the heat dissipation performance requirement of the communication products such as outdoor wireless base station, because
This, designs and develops the die-cast aluminum alloy material with more high thermal conductivity with important application value.
104264017 A of patent CN disclose a kind of pack alloy, by cocrystallizing type alusil alloy add Co,
Ti, B element make the thermal conductivity of alloy can reach 190W/ (mK).But there are two aspects in the alloy：(1) to pursue
High thermal conductivity, Fe contents only 0.2%~0.4% in the alloy, it is (especially complicated thin that too low Fe contents are unfavorable for die casting
Wall pieces) demoulding, it reduces production efficiency and increases mold loss；(2) heat conductivility announced in the patent actually alloy pig rather than
The performance of die casting, but alloy melting and be cast into after cast product, since the high cooldown rate of die-casting process leads to Si etc.
Element solid solution capacity in aluminum substrate dramatically increases, and the thermal conductivity of practical die casting will significantly decline, i.e., using the alloy production
The thermal conductivity of die casting to be significantly lower than 190W/ (mK).105838936 A of patent CN disclose a kind of high heat conduction casting
Aluminium alloy, main alloying element Si, thermal conductivity is more than 180W/ (mK), but is added to Al-Eu rare earths in the alloy preparation process
Alloy and mixed heavy rare earth (Tb, Dy, Ho, Tm, Yb and Lu), and it is not appropriate for for die casting.105177368 A of patent CN
A kind of highly conductive die-casting rare earth aluminium alloy of high heat conduction is disclosed, which is 120~160W/ (mK), but is added
Expensive rare earth element y, Ce and La.100473735 C of patent CN disclose a kind of electric-conductivity heat-conductivity high, high-strength aluminum alloy,
The alloy is also added to rare earth element and is only applicable to deformation processing, it is impossible to be used in die casting.
Invention content
For insufficient existing for above-mentioned prior art, the present invention provides that a kind of forming property is good and excellent thermal conductivity
Die-cast aluminum alloy material and preparation method thereof.
The present invention is achieved by the following technical solutions.
A kind of high heat conduction die-cast aluminum alloy material, which is characterized in that including following components in percent by weight：Zn
2.0~5.0%, Fe 0.5~1.3%, surplus are Al and impurity.
According to above-mentioned high heat conduction die-cast aluminum alloy material, which is characterized in that impurity (by mass percentage) packet
Include Si≤0.40%, Mg≤0.10%, Cu≤0.10%, Mn≤0.03%, Cr≤0.03%, V≤0.03%, Ti≤
0.03%, Zr≤0.03% and other impurities.
According to above-mentioned high heat conduction die-cast aluminum alloy material, which is characterized in that the other impurities are (by mass percentage
Meter) individual element≤0.05%, add up to≤0.10%.
A kind of preparation method of high heat conduction die-cast aluminum alloy material, which is characterized in that the step includes：
(1) high melt will be carried out by the proportioned aluminum and zinc of above-mentioned alloying component；
(2) ferro element is added in into the melt that step (1) obtains；
(3) refinery by de-gassing is carried out to the melt obtained by step (2), then skimmed, standing obtains aluminium alloy.
According to above-mentioned preparation method, which is characterized in that step (1) smelting temperature is 700~800 DEG C.
According to above-mentioned preparation method, which is characterized in that the step (2) adds in iron member when smelting temperature >=750 DEG C
Element.
According to above-mentioned preparation method, which is characterized in that step (3) refining temperature is 700~760 DEG C, during refining
Between 10~30 minutes.
According to above-mentioned preparation method, which is characterized in that the aluminium purity (by mass percentage) >=99.7%, zinc is pure
Degree is (by mass percentage) >=99.9%.
According to above-mentioned preparation method, which is characterized in that the form that ferro element is added in the step (2) is the iron of drying
Additive or ferro-aluminum intermediate alloy.
According to above-mentioned preparation method, which is characterized in that iron content is by mass percentage in the ferro-aluminum intermediate alloy
It is 10~20%.
According to above-mentioned preparation method, which is characterized in that by the aluminium alloy obtained through step (3) be cast into alloy pig or
For Die Casting die casting, casting temperature is 680~730 DEG C.
The advantageous effects of the present invention：The present invention provides one kind and not only can guarantee good forming property but also had both excellent
The aluminium diecasting alloy material of heat conductivility, it is seldom without adding commercial Application by scientific and reasonable design of alloy
Alloying element even thulium, need not also increase any heat treatment procedure, can realize that heat conductivility is more normal than ADC12 etc.
Rule pack alloy increases substantially.High heat conduction die-cast aluminum alloy material provided by the present invention is keeping good casting forming
Can while have both excellent heat conducting performance, can improve its radiating efficiency for Die Casting complexity heat dissipation parts, it is and existing
Conventional pack alloy is prominent as follows compared to having the advantages that：
(1) aluminium alloy of the invention has excellent heat conductivility, good casting forming performance simultaneously, can shape multiple
The heat radiation part of miscellaneous thin-walled；
(2) compared with same type aluminium alloy, aluminium alloy compression casting of the invention can still obtain higher heat conduction later into casting
Rate, thermal conductivity >=190W/ (mK) do not need to improve heat conductivility by subsequent heat treatment process；
(3) aluminium alloy of the invention does not need to addition noble metal or thulium to improve heat conductivility, effectively
It ensure that the economy of alloy；
(4) aluminium alloy of the invention is widely used in the heat dissipation parts in production communication, electronics, transportation industry, has
Wide application prospect.
Description of the drawings
Fig. 1 is that the casting fluidity of alloy of the present invention and external high heat conduction pack alloy can compare.
Fig. 2 is the heat conductivility comparison of alloy of the present invention and external high heat conduction pack alloy.
Specific embodiment
The present invention is described in detail With reference to embodiment.
A kind of high heat conduction die-cast aluminum alloy material, including following components in percent by weight：Zn 2.0~5.0%,
Fe 0.5~1.3%, surplus are Al and impurity.Wherein, impurity includes (by mass percentage)：Si≤0.40%, Mg≤
0.10%, Cu≤0.10%, Mn≤0.03%, Cr≤0.03%, V≤0.03%, Ti≤0.03%, Zr≤0.03% and
Other impurities；Individual element≤0.05% in other impurities (by mass percentage), other impurities add up to≤0.10%.
A kind of preparation method of high heat conduction die-cast aluminum alloy material, step include：
(1) prepare aluminium, zinc and iron additive or ferro-aluminum intermediate alloy by above-mentioned alloy compositions；Then aluminum and zinc is put into
High melt is carried out in smelting furnace；Smelting temperature be 700~800 DEG C, wherein, aluminium purity by mass percentage >=99.7%,
Zinc purity is by mass percentage >=99.9%；Fe contents are by mass percentage 75% in iron additive, are closed among ferro-aluminum
Iron content is 10~20% by mass percentage in gold；
(2) when smelting temperature >=750 DEG C, the iron additive or ferro-aluminum of drying are added in the melt obtained to step (1)
Iron additive or ferro-aluminum intermediate alloy of the addition form of intermediate alloy, i.e. ferro element to dry；
(3) refinery by de-gassing is carried out to the melt obtained by step (2), refining temperature is 700~760 DEG C, refining time
It 10~30 minutes, then skims, standing obtains aluminium alloy melt；
(4) aluminium alloy melt obtained through step (3) is cast into alloy pig or for Die Casting die casting, casting
Temperature is 680~730 DEG C.Obtained aluminum alloy die casting thermal conductivity >=190W/ (mK).
The high heat conduction die-cast aluminum alloy material of the present invention can be used as communication apparatus heat-dissipating casing, LED lamp radiator, 3C productions
The production raw material of the heat dissipation parts such as product cooling fin.
Furthermore, the high heat conduction die-cast aluminum alloy material radiates zero for producing communication apparatus heat-dissipating casing etc.
During part, preferred processing method is die casting.
Furthermore, this field production heat dissipation parts can be used in the processing method of heat dissipation parts of the present invention
Conventional equipment carries out.
Fig. 1 is that the casting fluidity of alloy of the present invention and external high heat conduction pack alloy can compare.Mobile performance is with phase
Length of flow of the conventional pack alloy ADC12 in helical flow testing mould is characterized, DX19, DX17 and DX26
For three kinds of high heat conduction pack alloys of Nippon Light Metal Co., Ltd's invention, alloy 3~7 is the alloy in the scope of the invention,
It can be seen that the alloy of the present invention has good casting fluidity energy, i.e. Alloy Forming is functional.
Fig. 2 is the heat conductivility comparison of alloy of the present invention and external high heat conduction pack alloy.DX19, DX17 and DX26 are
Three kinds of high heat conduction pack alloys of Nippon Light Metal Co., Ltd's invention, ADC12 are the conventional die casting aluminium of industrial dosage maximum
Alloy, alloy 3~7 are the alloy in the scope of the invention；The T5 heat that the thermal conductivity data of wherein DX19 and DX17 is 300 DEG C × 8h
Performance after processing, remaining is as-cast characteristic；It can be seen that the alloy of the present invention has excellent thermal conductivity under Die Casting Condition
Can, thermal conductivity is about 2 times of ADC12 alloys.
Below by specific embodiment, the present invention is described in further detail, but embodiments of the present invention are not only
It is limited to this.
A kind of high heat conduction die-cast aluminum alloy material of the present invention, including following components in percent by weight：Zn 2.0
~5.0%, Fe 0.5~1.3%, surplus are Al and impurity.Wherein impurity include Si≤0.40%, Mg≤0.10%, Cu≤
0.10%, Mn≤0.03%, Cr≤0.03%, V≤0.03%, Ti≤0.03%, Zr≤0.03% and other impurities；Its
His impurity individual element≤0.05% adds up to≤0.10%.
Embodiment 1
The high heat conduction pack alloy of the present embodiment is prepared with the following method：
Dispensing：Prepare pure zinc (Zn >=99.9%), fine aluminium (Al >=99.7%) and iron additive by above-mentioned alloy compositions
(Fe~75%) (amount containing Fe is 75% in chalybeate, remaining is cosolvent, and therefore, when not considering scaling loss, chalybeate should be according to required Fe
1.33 (1/75%=1.33) of content times prepare)；Above-mentioned raw material are dried for standby.
Melting：Aluminum and zinc is put into smelting furnace, 750 DEG C of fusings is heated to, then adds in the iron additive of drying and fill
Divide stirring；It treats that temperature drops to 740 DEG C, is led to using degassing apparatus (such as middle Shun HY-011XZ type aluminium alloys getter) into melt
Enter high-purity argon gas and carry out refinery by de-gassing, the degasification time is 15 minutes, is skimmed after degasification；20 minutes are stood, and is controlled
Melt temperature obtains high heat conduction aluminium alloy melt to 730 DEG C.
Casting：The alloy melt prepared in above-mentioned melting step is poured into preheated swage, be cast into alloy pig.
The present embodiment is total to 9 kinds of cast alloys ingot, meanwhile, a collection of alloy pig of being cast under similarity condition using ADC12 alloys
As a comparison, the main component of alloy and corresponding thermal conductivity test result are as shown in table 1.By table as it can be seen that the die casting of the present invention
Aluminium alloy has excellent heat conductivility.
Ingredient and the heat conductivility comparison of 1 alloy pig of table
Embodiment 2
It willEmbodiment 1In alloy 3, alloy 5, alloy 7 and ADC12 alloys ingot casting heat remelting respectively, and again
High-purity argon gas being passed through into melt using degassing apparatus and carrying out refinery by de-gassing, the degasification time is 15 minutes, is carried out after degasification
It skims.
(1) it is poured into and is preheated in 150 DEG C of helical flow testing mould when alloy melt overheats 100 DEG C,
Then the length of spiral sample is measured.Three spiral samples of each alloy casting, measure length and are averaged.The mobility of alloy
It is characterized with the percentage of the length of flow of opposite ADC12 alloys.The alloy of the present embodiment is sent out with Nippon Light Metal Co., Ltd
Fig. 1 is shown in the mobile performance comparison of three kinds of bright high heat conduction pack alloys DX19, DX17 and DX26 (see Figure of description).By scheming
As it can be seen that the mobility of alloy of the present invention be ADC12 alloys more than 75%, have good casting fluidity energy, i.e., alloy into
Shape is functional.
(2) when molten aluminum is cooled to and overheats 50 DEG C, test piece a batch of 300 tons of die casting machine die casting 3mm thickness, each conjunction are used
Golden to select 5 sample testing its thermal conductivitys at random, average conduction is to such as Fig. 2 (see Figure of description) Suo Shi.As seen from the figure,
The aluminium alloy of the present invention has still maintained very high thermal conductivity after die casting.
Embodiment 3
Dispensing and melting step prepared by the high heat conduction pack alloy of this implementation is same as Example 1, using direct-reading light
The chemical composition that spectrometer is analyzed to obtain alloy is (mass fraction, %)：Zn 3.09, Fe 1.05, Al surplus.By melted aluminium
Aluminium alloy temperature is controlled at 680~700 DEG C, and communication radiating shell part a batch is produced using 300 tons of die casting machines.Radiating shell pressure
The critical size of casting is as follows：Average wall thickness 2.5mm, fin height 45mm, there are three types of specification, difference for cooling fin top thickness
For 0.8mm, 1.2mm and 2.0mm.The radiating shell part produced using the high heat conduction pack alloy of the present invention has all been shaped
It is good, do not occur misruning defect at the top of cooling fin.Select the average value that 3 radiating shells measure the thermal conductivity of 9 positions at random
For 195W/ (mK).
More than 3 embodiments show that the high heat conduction pack alloy of the present invention has that forming property is good, heat conductivility is excellent
Different outstanding feature, and it is cast into the heat conductivility still having after practical casting more than 190W/ (mK).Therefore, originally
The high heat conduction pack alloy of invention can be widely applied for various communication apparatus radiating shells, LED lamp radiator or 3C productions
The heat dissipation parts of the suitable Die Casting such as product cooling fin greatly improve the radiating efficiency of product.
Above-described is only presently preferred embodiments of the present invention, not the limitation present invention.It should be understood that for this field
For those of ordinary skill, under technical inspiration provided by the present invention, other equivalent improvement can also be made, can be realized
The purpose of the present invention is regarded as protection scope of the present invention.
Claims (10)
1. a kind of high heat conduction die-cast aluminum alloy material, which is characterized in that including following components in percent by weight： Zn
2.0 ~ 5.0%, Fe 0.5 ~ 1.3%, surplus are Al and impurity.
2. high heat conduction die-cast aluminum alloy material according to claim 1, which is characterized in that the impurity（By quality percentage
Than meter）Including Si≤0.40%, Mg≤0.10%, Cu≤0.10%, Mn≤0.03%, Cr≤0.03%, V≤0.03%, Ti≤
0.03%, Zr≤0.03% and other impurities；The other impurities（By mass percentage）Individual element≤0.05% adds up to
≤0.10%。
3. a kind of preparation method of high heat conduction die-cast aluminum alloy material as claimed in claim 1 or 2, which is characterized in that described
Step includes：
（1）High melt will be carried out by the proportioned aluminum and zinc of above-mentioned alloying component；
（2）To step（1）Ferro element is added in obtained melt；
（3）To passing through step（2）Obtained melt carries out refinery by de-gassing, then skims, and standing obtains aluminium alloy.
4. preparation method according to claim 3, which is characterized in that the step（1）Smelting temperature is 700 ~ 800 DEG C.
5. preparation method according to claim 3, which is characterized in that the step（2）Iron is added in when smelting temperature >=750 DEG C
Element.
6. preparation method according to claim 3, which is characterized in that the step（3）Refining temperature is 700 ~ 760 DEG C, refining
10 ~ 30 minutes time.
7. preparation method according to claim 3, which is characterized in that the aluminium purity（By mass percentage）>=99.7%, zinc
Purity（By mass percentage）≥99.9%.
8. preparation method according to claim 3, which is characterized in that the step（2）The middle form for adding in ferro element is drying
Iron additive or ferro-aluminum intermediate alloy.
9. preparation method according to claim 3, which is characterized in that iron content is by mass percentage in the ferro-aluminum intermediate alloy
It is calculated as 10 ~ 20%.
10. preparation method according to claim 3, which is characterized in that will be through step（3）Obtained aluminium alloy is cast into alloy pig
Or for Die Casting die casting, casting temperature is 680 ~ 730 DEG C.
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| CN201810121048.6A CN108193105A (en) | 2018-02-07 | 2018-02-07 | A kind of high heat conduction die-cast aluminum alloy material and preparation method thereof |
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| CN201810121048.6A CN108193105A (en) | 2018-02-07 | 2018-02-07 | A kind of high heat conduction die-cast aluminum alloy material and preparation method thereof |
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Family
ID=62593188
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387493A (en) * | 2019-08-30 | 2019-10-29 | 昆山宏翔铝业有限公司 | A kind of processing proportion of indium kirsite aluminium |
| CN112853178A (en) * | 2020-12-31 | 2021-05-28 | 中铝材料应用研究院有限公司 | Anodic oxidation die-casting aluminum alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110387493A (en) * | 2019-08-30 | 2019-10-29 | 昆山宏翔铝业有限公司 | A kind of processing proportion of indium kirsite aluminium |
| CN112853178A (en) * | 2020-12-31 | 2021-05-28 | 中铝材料应用研究院有限公司 | Anodic oxidation die-casting aluminum alloy and preparation method thereof |
| CN112853178B (en) * | 2020-12-31 | 2022-03-15 | 中铝材料应用研究院有限公司 | Anodic oxidation die-casting aluminum alloy and preparation method thereof |
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Application publication date: 20180622 |