CN108165850A - A kind of high heat conduction die casting aluminium zinc alloy material and preparation method thereof - Google Patents
A kind of high heat conduction die casting aluminium zinc alloy material and preparation method thereof Download PDFInfo
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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
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Abstract
A kind of high heat conduction die casting aluminium zinc alloy material, which is characterized in that including following components in percent by weight：Zn 2.0 ~ 5.0%, Fe 0.5 ~ 1.3%, Mg 0.1 ~ 0.6%, surplus are Al and impurity element.High heat conduction die casting aluminium zinc alloy material provided by the present invention is new A l Zn systems alloy material, pass through scientific and reasonable design of alloy, under the premise of casting forming performance is ensured, the seldom alloying element of commercial Application even thulium need not be added, also it need not increase any heat treatment procedure, heat conductivility pack alloy more conventional than ADC12 etc. can be realized to be substantially improved, and die casting has Thermal conductivity and comprehensive mechanical property, is conducive to subsequent machining.
Description
Technical field
The invention belongs to nonferrous materials and its molding field is prepared, is related to a kind of heat conductivility and mechanical property is excellent
Good die casting aluminium zinc alloy material 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 market is former to the aluminium alloy of such product
The heat conductivility of material proposes increasingly higher demands.Meanwhile a part of product due to needing to attack a large amount of screw holes for pacifying
Component is filled, alloy mechanical property is relatively low will to make its machining difficult；Other thermal component then has lightweight urgent
Demand, good mechanical property are beneficial to push product light-weight design, thus, the heat dissipation parts of these types are also to it
The mechanical property of aluminium alloy used puts forward relatively high requirement.In 3C Product industry, mobile phone center and shell and pen
Remember the typical products such as this computer skeleton and shell, in addition to mechanical property requirements, requirement to heat conductivility is equally also increasingly
It is high.Therefore, market active demand has both the pack alloy of good mechanical property and excellent heat conductivility.
Cocrystallizing type or nearly cocrystallizing type alusil alloy are most important pack alloys, for example, YL113, YL112, YL101 and
YL102 (national standard GB/T 15115-2009), wherein YL113 (is equivalent to Japanese JIS H5302：ADC12 in 2006 standards is closed
Gold) dosage is maximum, purposes also the most extensively.The good mechanical performance of ADC12 alloys, but die casting state thermal conductivity is only about 92W/
(m·K).At present, the thermal conductivity of conventional pack alloy is usually between 90~110W/ (mK).By material property and system
The limitation of standby technique, the heat dissipation performance that common pack alloy has been unable to meet the products such as communication apparatus housing, phone housing will
It asks, therefore, designs and develops the die-cast aluminum alloy material with more high thermal conductivity with important application value.
Patent CN 104264017A 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)；165~180MPa of tensile strength, yield strength 85~
98MPa.But there are two aspects in the alloy：(1) to pursue high thermal conductivity, Fe contents only 0.2% in the alloy~
0.4%, too low Fe contents are unfavorable for die casting (especially complex thin-walled member) demoulding, reduce production efficiency and increase mold damage
Consumption；(2) heat conductivility announced in the patent actually performance of alloy pig rather than die casting, but alloy melting and it is cast into casting
It is practical to press since the high cooldown rate of die-casting process causes the elements such as Si solid solution capacity in aluminum substrate to dramatically increase after product
The thermal conductivity of casting will significantly decline, i.e., be less than 190W/ (mK) using the thermal conductivity of the die casting of the alloy production.Patent
CN 105838936A disclose a kind of high heat conduction cast aluminium alloy gold, main alloying element Si, and thermal conductivity is more than 180W/ (mK),
But Al-Eu rare earth alloys and mixed heavy rare earth (Tb, Dy, Ho, Tm, Yb and Lu) are added in the alloy preparation process, and it is simultaneously
Die casting is not suitable for.Patent CN 105177368A disclose a kind of highly conductive die-casting rare earth aluminium alloy of high heat conduction, the alloy
Thermal conductivity is 120~160W/ (mK), and mechanical property can reach 220~270MPa of tensile strength, yield strength 140~
190MPa, elongation percentage 10~18%, but the alloy are added to expensive rare earth element y, Ce and La.Patent CN 100473735C
A kind of electric-conductivity heat-conductivity high, high-strength aluminum alloy are disclosed, which is also added to rare earth element and is only applicable to deformation processing, no
It can be used for die casting.
Invention content
For a kind of insufficient existing for above-mentioned prior art, die casting alumin(i)um zinc alloy with high thermal conductivity of present invention offer
Material and preparation method thereof.
The present invention is achieved by the following technical solutions.
A kind of high heat conduction die casting aluminium zinc alloy material, which is characterized in that including following components in percent by weight：Zn
2.0~5.0%, Fe 0.5~1.3%, Mg 0.1~0.6%, surplus are Al and impurity.
According to above-mentioned high heat conduction die casting aluminium zinc alloy material, which is characterized in that the impurity includes Si≤0.40%, 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 casting aluminium zinc alloy material, which is characterized in that the other impurities individual element≤
0.05%, add up to≤0.10%.
A kind of preparation method of above-mentioned alumin(i)um zinc 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) make its fusing in the melt for obtaining the press-in of the magnesium of drying by step 1)；
3) ferro element is added in into the melt obtained through step 2)；
4) refinery by de-gassing is carried out to the melt obtained by step 3), then skimmed, standing obtains alumin(i)um zinc alloy.
According to above-mentioned preparation method, which is characterized in that the step 1) smelting temperature is 700~800 DEG C.
According to above-mentioned preparation method, which is characterized in that the step 2) smelting temperature is 740~780 DEG C.
According to above-mentioned preparation method, which is characterized in that the step 3) adds in iron member when smelting temperature >=750 DEG C
Element.
According to above-mentioned preparation method, which is characterized in that the step 4) refining temperature is 700~760 DEG C, refining time
10~30 minutes.
According to above-mentioned preparation method, which is characterized in that the aluminium purity by mass percentage >=99.7%, zinc purity
By mass percentage >=99.9%, magnesium purity 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 3) 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 through the alumin(i)um zinc alloy that step 4) obtains be cast into alloy pig or
Person is used for Die Casting die casting, and casting temperature is 680~730 DEG C.
The advantageous effects of the present invention：High heat conduction die casting aluminium zinc alloy material provided by the present invention is new A l-Zn
It is alloy material, by scientific and reasonable design of alloy, under the premise of casting forming performance is ensured, without adding industry
Using seldom alloying element even thulium, it need not also increase any heat treatment procedure, you can realize heat conductivility
Pack alloy more conventional than ADC12 etc. is substantially improved, and die casting has Thermal conductivity and comprehensive mechanical property, favorably
In subsequent machining.The alloy heat conductivility protrudes, while good mechanical properties, for Die Casting complexity heat dissipation parts
Its radiating efficiency can be improved, is had the advantages that compared with existing conventional pack alloy prominent as follows：
(1) alumin(i)um zinc alloy of the invention has higher heat conductivility, good mechanical property, aluminium zinc of the invention simultaneously
Alloy die cast is into the typical performance after casting：Thermal conductivity >=180W/ (mK), tensile strength >=160MPa, yield strength
>=80MPa, compared with same type aluminium alloy, alumin(i)um zinc alloy of the invention can still obtain higher heat conduction after being cast into casting
Rate, and good mechanical property is had both, it does not need to improve heat conductivility by subsequent heat treatment process；
(2) alumin(i)um zinc alloy of the invention does not need to addition noble metal or thulium to improve heat conductivility, effectively
The economy that ensure that alloy；
(3) alumin(i)um zinc alloy of the invention is widely used in production communication, electronics, transportation industry to mechanical property and heat conduction
The parts that performance requires, have broad application prospects.
Specific embodiment
The present invention is described in detail With reference to embodiment.
A kind of high heat conduction die casting aluminium zinc alloy material, including following components in percent by weight：Zn2.0~5.0%,
Fe 0.5~1.3%, Mg 0.1~0.6%, surplus are Al and impurity.Wherein, impurity includes (by mass percentage)：Si≤
0.40%, 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 the other impurities, other impurities add up to≤0.10%.
A kind of method for preparing alumin(i)um zinc alloy material, step include：
1) prepare zinc, magnesium, aluminium and iron additive or ferro-aluminum intermediate alloy by above-mentioned alloy compositions；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) make its fusing in the melt for obtaining the press-in of the magnesium of drying by step 1)；Smelting temperature is 740~780 DEG C,
Wherein, magnesium purity is by mass percentage >=99.9%；
3) at smelting temperature >=750 DEG C, the iron additive or ferro-aluminum of drying are added in into the melt obtained through step 2)
The addition form of intermediate alloy, i.e. ferro element is the iron additive of drying or ferro-aluminum intermediate alloy；
4) refinery by de-gassing is carried out to the melt obtained by step 3), refining temperature is 700~760 DEG C, refining time 10
It~30 minutes, then skims, standing obtains high heat conduction die casting alumin(i)um zinc alloy melt, for subsequently casting；
5) alloy pig will be cast into or through the alumin(i)um zinc alloy that step 4) obtains for Die Casting die casting, casting temperature
It is 680~730 DEG C.The typical performance that the alumin(i)um zinc alloy of the present invention is cast into after casting is：Thermal conductivity >=180W/ (mK),
Tensile strength >=160MPa, yield strength >=80MPa,
The high heat conduction die casting aluminium zinc alloy material of the present invention can be used as communication apparatus radiating shell, mobile phone center or notebook
The production raw material of the parts such as computer casing.
Furthermore, it is preferred to process when the high heat conduction die casting aluminium zinc alloy material is for producing heat dissipation parts
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.
Alloying element selection and its scientific basis that content range determines are illustrated individually below：
Zn：Zn elements are selected as main alloying element, on the one hand, Zn elements can substitute the casting stream that Si improves aluminium alloy
Dynamic property；Secondly, Zn elements solid solution capacity in aluminium is big, and alloy strength can be improved by solution strengthening by adding in aluminium；In addition, Zn pairs
The influence of the conduction of Al and opposite Si, Cu, Mg main alloying element of the influence of heat conductivility is much smaller.But Zn contents are less than 2%
When, alumin(i)um zinc alloy low strength；After Zn contents are more than 5%, hot cracking tendency when alumin(i)um zinc alloy is cast significantly increases.Therefore,
The alloy design Zn content ranges of the present invention are 2.0~5.0%.
Fe：Main functions of the Fe in pack alloy is the anti-stick mould performance for improving alloy, reduces die casting sticking to mould and inclines
To raising production efficiency and die life；In addition, suitable Fe contents can also improve the yield strength of aluminium alloy.Study table
It is bright, Fe contents be more than 0.6% after, alloy sticking to mould tendency i.e. substantially reduces, but Fe contents be more than 1.3% after can be formed it is coarse
Copper component, low-alloyed heat conductivility and mechanical property especially toughness drop.Therefore, Fe contents preferably ranging from 0.5~
1.3%.
Mg：Mg can improve the intensity and casting fluidity of aluminium alloy, for having the aluminium alloy of some strength requirement, Mg members
Element is ideal alloy element.But Mg, which is added in aluminium alloy, can reduce its heat conductivility, thus for conducting alloy, Mg
Additive amount should not be too high.It therefore, can be according to requirement of the product for mechanical property difference, flexibly in the range of 0.1~0.6%
Mg contents are allocated, to obtain optimal comprehensive performance and economic benefit.
Below by coming with embodiment, the present invention is described in further detail, but embodiments of the present invention are not only
It is limited to this.
Embodiment 1
The high heat conduction die casting alumin(i)um zinc alloy of the present embodiment is prepared with the following method：
A kind of high heat conduction die casting aluminium zinc alloy material, including following components in percent by weight：Zn2.0~5.0%,
Fe 0.5~1.3%, Mg 0.1~0.6%, surplus are Al and impurity.Wherein, impurity includes (by mass percentage)：Si≤
0.40%, Cu≤0.10%, Mn≤0.03%, Cr≤0.03%, V≤0.03%, Ti≤0.03%, Zr≤0.03% and
Other impurities；Other impurities individual element≤0.05% adds up to≤0.10%.
Dispensing：By above-mentioned alloy compositions prepare pure zinc (Zn >=99.9%), pure magnesium (Mg >=99.9%), fine aluminium (Al >=
99.7%) and iron additive (Fe~75%) (in chalybeate amount containing Fe be 75%, remaining is cosolvent, therefore, does not consider to burn
During damage, chalybeate should prepare according to 1.33 (1/75%=1.33) times of required Fe contents)；Above-mentioned raw material are dried for standby.
Melting：Aluminum and zinc is put into smelting furnace, is heated to 750 DEG C of fusings, the magnesium of drying is pressed into using bell-jar and is melted
Make its fusing in body, then add in the iron additive of drying and be sufficiently stirred；It treats that temperature drops to 740 DEG C, uses degassing apparatus (example
Such as middle Shun HY-011XZ type aluminium alloys getter) high-purity argon gas progress refinery by de-gassing is passed through into melt, the degasification time is 15 points
Clock is skimmed after degasification；20 minutes are stood, and melt temperature is controlled to obtain high heat conduction alumin(i)um zinc alloy to 730 DEG C and melt
Body.
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 4, alloy 5 and ADC12 alloys ingot casting heat remelting respectively into molten aluminum, and again
High-purity argon gas is passed through into melt using rotation degassing apparatus and carries out refinery by de-gassing, the degasification time is 15 minutes, after degasification
It skims.
When molten aluminum is cooled to 50 DEG C of overheat, tablet test piece and standard tensile using 300 tons of die casting machine die casting 3mm thickness
Sample a batch, each alloy selects 5 plane plate specimens and tests its thermal conductivity, 5 tensile sample test mechanical properties at random, average
Thermal conductivity and mechanical performance data comparison are as shown in table 2.By table as it can be seen that the aluminium alloy of the present invention still maintains after die casting
Excellent heat conductivility, and good mechanical properties.
Heat conductivility and the mechanical property comparison of 2 die casting test piece of table
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 3.11, Fe 0.92, Mg 0.38, Al surplus.It will close
Golden melt temperature control produces communication apparatus radiating shell part a batch at 680~700 DEG C, using 300 tons of die casting machines.Radiating shell
The critical size of die casting is as follows：Average wall thickness 2.5mm, fin height 45mm, there are three types of specifications for cooling fin top thickness, divide
It Wei not 0.8mm, 1.2mm and 2.0mm.The radiating shell part forming produced using the high heat conduction pack alloy of the present invention is intact,
Do not occur misruning defect at the top of cooling fin.It is random select the thermal conductivity that 3 radiating shells measure 9 positions average value be
183W/(m·K)。
More than 3 embodiments show that the high heat conduction pack alloy of the present invention has heat conductivility and good mechanical performance
Outstanding feature, and it is cast into the heat conductivility still having after practical casting more than 180W/ (mK).Therefore, it is of the invention
High heat conduction pack alloy can be widely applied for various communication apparatus radiating shells, mobile phone center or notebook computer casing
Etc. the parts of suitable Die Casting, the radiating efficiency of product is greatly improved.
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 casting aluminium zinc alloy material, which is characterized in that including following components in percent by weight：Zn
2.0 ~ 5.0%, Fe 0.5 ~ 1.3%, Mg 0.1 ~ 0.6%, surplus are Al and impurity.
2. high heat conduction die casting aluminium zinc alloy material according to claim 1, which is characterized in that the impurity include Si≤
0.40%, Cu≤0.10%, Mn≤0.03%, Cr≤0.03%, V≤0.03%, Ti≤0.03%, Zr≤0.03% and other are miscellaneous
Matter；Other impurities individual element≤0.05% adds up to≤0.10%.
3. a kind of preparation method of alumin(i)um zinc alloy material as claimed in claim 1 or 2, 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）By the magnesium press-in of drying by step 1）Make its fusing in obtained melt；
3）To through step 2）Ferro element is added in obtained melt；
4）To passing through step 3）Obtained melt carries out refinery by de-gassing, then skims, and standing obtains alumin(i)um zinc 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）Smelting temperature is 740 ~ 780 DEG C.
6. preparation method according to claim 3, which is characterized in that the step 3）Add when smelting temperature >=750 DEG C
Enter ferro element.
7. preparation method according to claim 3, which is characterized in that the step 4）Refining temperature is 700 ~ 760 DEG C, essence
Refine 10 ~ 30 minutes time.
8. preparation method according to claim 3, which is characterized in that the aluminium purity by mass percentage >=99.7%,
By mass percentage >=99.9%, magnesium purity is by mass percentage >=99.9% for zinc purity.
9. preparation method according to claim 3, which is characterized in that the step 3）The middle form for adding in ferro element is dries
Dry iron additive or ferro-aluminum intermediate alloy.
10. preparation method according to claim 3, which is characterized in that will be through step 4）Obtained alumin(i)um zinc alloy is cast into
Alloy pig or for Die Casting die casting, casting temperature is 680 ~ 730 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108546853A (en) * | 2018-07-16 | 2018-09-18 | 山东华宇合金材料有限公司 | A kind of novel high heat conduction die-cast aluminum alloy material and preparation method thereof |
| 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 |
| CN112626391A (en) * | 2021-01-07 | 2021-04-09 | 重庆慧鼎华创信息科技有限公司 | Low-silicon high-heat-conductivity die-casting aluminum alloy and preparation method thereof |
| CN115074586A (en) * | 2022-07-07 | 2022-09-20 | 深圳市逸昊金属材料研发有限公司 | High-strength and high-toughness die-casting aluminum alloy and semi-solid composite extrusion casting process thereof |
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| CN106756335A (en) * | 2016-12-30 | 2017-05-31 | 南京协众汽车空调集团有限公司 | A kind of pipelines of automobile air conditioner cast aluminium material |
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| CN106282701A (en) * | 2016-09-21 | 2017-01-04 | 东莞劲胜精密组件股份有限公司 | A kind of die-cast aluminum alloy material, its making and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108546853A (en) * | 2018-07-16 | 2018-09-18 | 山东华宇合金材料有限公司 | A kind of novel high heat conduction die-cast aluminum alloy material and preparation method thereof |
| 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 |
| CN112626391A (en) * | 2021-01-07 | 2021-04-09 | 重庆慧鼎华创信息科技有限公司 | Low-silicon high-heat-conductivity die-casting aluminum alloy and preparation method thereof |
| CN112626391B (en) * | 2021-01-07 | 2022-05-03 | 重庆慧鼎华创信息科技有限公司 | Low-silicon high-heat-conductivity die-casting aluminum alloy and preparation method thereof |
| CN115074586A (en) * | 2022-07-07 | 2022-09-20 | 深圳市逸昊金属材料研发有限公司 | High-strength and high-toughness die-casting aluminum alloy and semi-solid composite extrusion casting process thereof |
| CN115074586B (en) * | 2022-07-07 | 2024-05-14 | 深圳市逸昊金属材料研发有限公司 | High-strength and high-toughness die-casting aluminum alloy and semi-solid composite extrusion casting process thereof |
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