CN110343918A - High thermal conductivity aluminum alloy materials and preparation method thereof - Google Patents
High thermal conductivity aluminum alloy materials and preparation method thereof Download PDFInfo
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- CN110343918A CN110343918A CN201910561132.4A CN201910561132A CN110343918A CN 110343918 A CN110343918 A CN 110343918A CN 201910561132 A CN201910561132 A CN 201910561132A CN 110343918 A CN110343918 A CN 110343918A
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- 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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/04—Modified aluminium-silicon alloys
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Abstract
This application provides a kind of high thermal conductivity aluminum alloy materials and preparation method thereof, are related to aluminum alloy materials field.The main component of the high thermal conductivity aluminium alloy is silicon, magnesium, iron, copper, manganese, strontium, cerium, lanthanum and aluminium, and according to mass percent meter, the aluminum alloy materials include following components: silicon: 6.0%-8.0%；Magnesium: 0.25%-0.5%；Iron: 0.5%-0.8%；Copper: 0-0.1%；Manganese: 0-0.04%；Strontium: 0-0.1%；Compound rare-earth 0-0.2%；Surplus is aluminium and impurity element, wherein every kind of impurity element mass percentage need to control below 0.015%.The embodiment of the present application is designed by the component to aluminium alloy, and the high thermal conductivity aluminium alloy of acquisition can have both high-termal conductivity and good mechanical property, the die casting structure part complicated in the precision of end product suitable for application and preparation.
Description
Technical field
This application involves aluminum alloy materials field fields, relate more specifically to a kind of high thermal conductivity aluminum alloy materials.
Background technique
Pack alloy is a kind of complex model shell and terminal for being widely used in production electronics and communication apparatus product
The metal material of product tight structure part.Pack alloy is usually used in preparing such as base station filter cavity with its excellent performance
The structural members such as plate and shell in body, transmitter shell, notebook or mobile phone.However, terminal produces with the development of intelligent terminal
The use power consumption of product is constantly soaring, proposes higher demand to terminal hardware heat-sinking capability.And die casting is as end product
The important component of structural member, the quality of heating conduction directly affect the integral heat sink performance of end product.And die casting
Part heating conduction is again by the great influence for preparing material, therefore, the raising of the heating conduction to realize die casting, to die casting
The research of the heating conduction of material becomes a crucial link.Currently, the thermal coefficient of common pack alloy is 100W/
MK or so, the die casting being prepared by the pack alloy can not play good conductive force in end product.
Therefore, there is high thermal conductivity and the aluminum alloy materials of excellent mechanical properties to become urgent problem to be solved for research and development.
Summary of the invention
The application provides a kind of high thermal conductivity aluminum alloy materials and preparation method thereof, to solve the high-termal conductivity of pack alloy
The problem of capable of can not being had both with intensity.
In a first aspect, providing a kind of high thermal conductivity aluminum alloy materials, the main component of the high thermal conductivity aluminum alloy materials is
Silicon, magnesium, iron, copper, manganese, strontium, compound rare-earth and aluminium, and according to mass percent meter, the aluminum alloy materials include with the following group
Point: silicon: 6.0%-8.0%；Magnesium: 0.25%-0.5%；Iron: 0.5%-0.8%；Copper: 0-0.1%；Manganese: 0-0.04%；Strontium: 0-
0.1%；Compound rare-earth 0-0.2%；Surplus is aluminium.
With reference to first aspect, in certain implementations of first aspect, according to mass percent meter, the high thermal conductivity aluminium
Alloy material includes following components: silicon: 7.0%-7.2%；Magnesium: 0.25%-0.40%；Iron: 0.5%-0.6%；Copper:
0.05%-0.10%；Manganese: 0.03%-0.04%；Strontium: 0-0.02%；Compound rare-earth 0-0.15%；Surplus is aluminium.
With reference to first aspect, in certain implementations of first aspect, the compound rare-earth includes cerium and lanthanum, and described
The mass percent of cerium and lanthanum is 3:2.
With reference to first aspect, in certain implementations of first aspect, according to mass percent meter, the high thermal conductivity aluminium
Alloy material includes following components: silicon: 7.0%；Magnesium: 0.25%；Iron: 0.6%；Copper: 0.1%；Manganese: 0.04%；Strontium:
0.015%；Cerium: 0.06%；Lanthanum: 0.04%；Surplus is aluminium.
With reference to first aspect, in certain implementations of first aspect, according to mass percent meter, the high thermal conductivity aluminium
Alloy material includes following components: silicon: 7.0%；Magnesium: 0.35%；Iron: 0.57%；Copper: 0.06%；Manganese: 0.03%；Strontium:
0.02%；Cerium: 0.072%；Lanthanum: 0.048%；Surplus is aluminium.
With reference to first aspect, in certain implementations of first aspect, according to mass percent meter, the high thermal conductivity aluminium
Alloy material includes following components: silicon: 7.2%；Magnesium: 0.4%；Iron: 0.5%；Copper: 0.05%；Manganese: 0.03%；Strontium:
0.02%；Cerium: 0.09%；Lanthanum: 0.06%；Surplus is aluminium.
With reference to first aspect, in certain implementations of first aspect, the aluminum alloy materials further include impurity element,
And the mass percentage of every kind of impurity element is 0.015% hereinafter, the impurity element comprises at least one of the following: zinc, zirconium,
Titanium, boron, vanadium, cadmium, beryllium, chromium, nickel, lead, tin, antimony.
With reference to first aspect, in certain implementations of first aspect, the high thermal conductivity aluminum alloy materials pass through resistance
It is prepared by melting mode.
With reference to first aspect, in certain implementations of first aspect, it is described prepared by resistance melting mode it is described
During high thermal conductivity aluminum alloy materials, inert gas or nitrogen are passed through into smelting equipment.
With reference to first aspect, in certain implementations of first aspect, the high thermal conductivity aluminum alloy materials are for passing through
Compression casting mode prepares die casting structure part.
Second aspect provides a kind of preparation method of high thermal conductivity aluminum alloy materials, comprising: appoints according in such as first aspect
The component of high thermal conductivity aluminum alloy materials described in one implementation configures raw material；The raw material is carried out by resistance melting equipment
Melting, and obtain alloy molten solution；The alloy molten solution is poured into metal die, alloy pig is obtained.
The third aspect, provides a kind of die casting structure part, and the die casting structure part is used such as any realization in first aspect
High thermal conductivity aluminum alloy materials die casting described in mode forms.
According to high thermal conductivity aluminum alloy materials provided by the embodiments of the present application, set by the ingredient to aluminum alloy materials
Meter, so that the aluminum alloy materials have both good mechanical property and high-termal conductivity, so that the die casting structure prepared using it
Part has good heating conduction and mechanical property.
Detailed description of the invention
A kind of Fig. 1 schematic flow chart of high thermal conductivity aluminum alloy materials preparation process provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with specific embodiment, the technical solution in the application is described.Obviously, the embodiment looked familiar
Only a part of the embodiment of the technical solution of the application, instead of all the embodiments.Based on the embodiment in the application,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this Shen
The range that please be protect.
For ease of understanding, some concepts that the application may relate to simply are introduced first.
Die casting: die casting is a kind of part of compression casting, by the compression casting machinery die casting for installing casting die
Machine casts out the feeding inlet that the metals such as the copper, zinc, aluminum or aluminum alloy that are heated to be liquid pour into die casting machine through die casting machine die casting
Copper, zinc, aluminium part or the aluminum alloy part of the shape and size of mold limitation, these aforementioned parts are commonly known as die casting
Part.Die casting can be called diecast parts, die-casting, die casting, die casting aluminium, die case zinc part, die casting copper piece, zinc die casting again
Part, aluminium diecasting, aluminium pressure alloy-steel casting, aluminium alloy compression casting part etc..
ADC12 alloy: also known as No. 12 aluminium material are Al-Si-Cu alloy, are a kind of pack alloys, are suitable for valve mechanism cover
Lid, sensor stand, cylinder body class etc. prepare material.ADC12 alloy is the Japanese trade mark, is equivalent to the domestic alloy designations of China
YL113, alloy designations YZAlSi11Cu3, execute standard GB/T 15115-2009.Corresponding U.S.'s trade mark is 384.
ZL101A aluminium alloy: title material ZalSi7MgA, main component and element mass percent content
As shown in table 1.
Table 1
ZL 102 alloy: the mass percent content of main component and element is as shown in table 2.
Table 2
| Silicon | Magnesium | Titanium | Iron | Impurity element | Aluminium |
| 10.0%-13.0% | 0-0.1% | 0-0.20% | 0-0.70% | ≤ 2.0% | Surplus |
In the pack alloy of current mainstream, in order to meet the performance requirement of different aspect, often add into aluminium alloy
Add multiple element.Wherein, the essential element of addition and purpose are main are as follows: element silicon: improving the mobility of aluminium alloy, make its tool
There is good casting character；The alloying elements such as copper, magnesium: the mechanical property of aluminium alloy is improved；Iron, manganese element: guarantee that die casting is completed
Aluminium alloy depanning afterwards is smooth；Alloy refinement agent: mainly including titanium elements and boron element, refine crystal grain, improve alloy structure, with
Improve the mechanical property of aluminium alloy.But improve aluminum alloy organization or items using addition silicon or boron or other alloying elements
During energy, the additive amount of each element needs to control in suitable content range, for example, if each addition element contains
Amount is excessively or the type of addition element is excessive, will lead to aluminium alloy and more serious distortion of lattice occurs, and then seriously destroy this
The electric conductivity and thermal conductivity of aluminium alloy.With for the ADC12 alloy that is most widely used in pack alloy, in the alloy
Silicon content is 9.5-11.5wt.%, but its thermal conductivity is only 96W/ (mK).In fact, usually, pack alloy
Intensity and thermal conductivity between have the relationship mutually restricted, the reason is that in order to obtain high thermal conductivity, it is necessary to control alloy member
The additive amount of element, but the reduction of alloying element will lead to alloy strength decline, and such as ZL101A aluminium alloy, as cast condition thermal conductivity is
151W/ (mK), but its tensile strength is about 130MPa；Alternatively, ZL102 aluminium alloy, as cast condition thermal conductivity is 121W/ (m
K), but its tensile strength is equally also about 130Mpa.Therefore, at present the pack alloy of mainstream at being grouped as and can not make
The aluminium alloy has both high-termal conductivity and good mechanical property, and structural member prepared therefrom can not meet end product to scattered
The requirement of hot property and mechanical property.
In view of the above-mentioned problems, the embodiment of the present application provides a kind of pack alloy, pass through each member in design aluminium alloy
The component of element, makes it have high thermal conductivity and good mechanical property.
It should be understood that element silicon is a kind of element highly beneficial to improvement alloy flowability, but the addition meeting of element silicon
Reduce the heating conduction of aluminium alloy.It therefore, is the high thermal conductivity for guaranteeing pack alloy, the embodiment of the present application is guaranteeing alloy
Under the premise of material has certain fluidity, the mass percentage of element silicon in alloy material is reduced or controlled in 6.0%-
8.0%.In addition, magnesium elements and copper are the main intensified element in aluminium-silicon alloys, magnesium and silicon are capable of forming through Overheating Treatment
Mg2Si precipitated phase, the intensity after improving alloy aging, and the thermal conductivity of alloy is improved, therefore, more magnesium member is added in design
Element, such as can add the mass percentage of magnesium elements is 0.25%-0.5%；And the solution strengthening effect of copper is stronger, also can
The enough effective intensity and hardness for improving alloy, especially room temperature strengthening effect are more excellent.But still further aspect, in view of excessive
Addition element will lead in alloy and serious distortion of lattice occur, and then influence the thermal conductivity of alloy, especially copper pair
Alloy conductivity and thermal conductivity are affected, and comprehensively consider influence of the addition element to alloy properties, and the application is implemented
The content of copper is greatly lowered in the pack alloy of example design, such as the upper limit content of control copper is 0.1wt.%
Hereinafter, simultaneously, use higher Mg content and design, also has to guarantee pack alloy while possessing high-termal conductivity higher
Mechanical property.In addition, in order to control the size of Eutectic Silicon in Al-Si Cast Alloys in aluminium alloy, the also strontium of the appropriate mass percentage of design addition,
Wherein, the content of strontium for example can be below 0.1%.
It should also be understood that it is a small amount of that the embodiment of the present application mainly passes through addition for the casting fluidity for improving pack alloy
Compound rare-earth, such as compound rare-earth total amount are less than or equal to 0.2wt.%.Illustratively, which for example can be cerium
And lanthanum, it is preferable that the ratio of cerium, lanthanum mass percent are as follows: 3:2.Since cerium, lanthanum are capable of forming Al in aluminium alloy4Ce、Al4La
And Al8Cu4Ce phase forms nucleation mass point, is organized by modifying-refining α-Al, improves alloy thermal conductivity and cast aluminium alloy gold die casting
The mobility of aluminium alloy in the process makes the vacuum flow of new alloy and ADC12 alloy quite be even better than ADC12 alloy.Together
When, being added for compound rare-earth can be to avoid the aluminium alloy of fining agent for traditionally titanium and boron being used to be combined at anodized surface
Reason is linear trace defect easy to form, make alloy have it is good can anodization characteristic.
Further, since impurity will seriously reduce the practical thermal conductivity of aluminium alloy, for this purpose, height provided by the embodiments of the present application
The addition of heat-conduction aluminum alloy material strict control impurity element, wherein impurity element be mainly zinc, zirconium, titanium, boron, vanadium, cadmium, beryllium,
Chromium, nickel, lead, tin etc., and the mass percentage of every kind of impurity element needs to control below 0.015%.
Pack alloy provided by the embodiments of the present application is introduced in detail below in conjunction with specific embodiment.
In a kind of implementation of the embodiment of the present application, a kind of high thermal conductivity aluminum alloy materials are provided, are mainly formed
Element is silicon, magnesium, iron, copper, manganese, strontium, cerium, lanthanum, remaining is aluminium and inevitable micro impurity element, wherein each element
Mass percent be respectively as follows: silicon: 6.0%-8.0%, magnesium: 0.25%-0.50%, iron: 0.5%-0.8%, copper: 0-0.1%,
Manganese: 0-0.04%, strontium: 0-0.1%, compound rare-earth are less than or equal to 0.2%, and surplus is aluminium and trace impurity.In addition, in order to make height
Heat-conduction aluminum alloy material has more preferably mechanical property and heating conduction, the high thermal conductivity aluminum alloy materials provided in this implementation
Compound rare-earth may include cerium and lanthanum, and the ratio of the mass percent of cerium and lanthanum can be the percentage of 3:2 namely Ce elements
Than being 0.12%, the percentage of lanthanum element is 0.08%.
In another implementation of the embodiment of the present application, a kind of high thermal conductivity aluminum alloy materials are provided, mainly group
It is silicon, magnesium, iron, copper, manganese, strontium, cerium, lanthanum at element, remaining is aluminium and inevitable micro impurity element, wherein Ge Geyuan
The mass percent of element is respectively as follows: silicon: 7.0%-7.2%, magnesium: 0.25%-0.40%, iron: 0.5%-0.6%, copper:
0.05%-0.10%, manganese: 0.03%-0.04%, strontium: 0-0.02%, compound rare-earth be less than or equal to 0.15%, surplus be aluminium and
Trace impurity.In addition, in order to make high thermal conductivity aluminum alloy materials that there is more preferably mechanical property and heating conduction, in this implementation
The compound rare-earth of the high thermal conductivity aluminum alloy materials of offer may include cerium and lanthanum, and the ratio of the mass percent of cerium and lanthanum can
To be the percentage of 3:2 namely Ce elements for 0.09%, the percentage of lanthanum element is 0.06%.
In another implementation of the embodiment of the present application, a kind of high thermal conductivity aluminum alloy materials are provided, mainly group
It is silicon, magnesium, iron, copper, manganese, strontium, cerium, lanthanum at element, remaining is aluminium and inevitable micro impurity element, wherein Ge Geyuan
The mass percent of element is respectively as follows: silicon: 7.0%；Magnesium: 0.25%；Iron: 0.6%；Copper: 0.1%；Manganese: 0.04%；Strontium:
0.015%；Cerium: 0.06%；Lanthanum: 0.04%；Surplus is aluminium and trace impurity.
In another implementation of the embodiment of the present application, a kind of high thermal conductivity aluminum alloy materials are provided, mainly group
It is silicon, magnesium, iron, copper, manganese, strontium, cerium, lanthanum at element, remaining is aluminium and inevitable micro impurity element, wherein Ge Geyuan
The mass percent of element is respectively as follows: silicon: 7.0%；Magnesium: 0.35%；Iron: 0.57%；Copper: 0.06%；Manganese: 0.03%；Strontium:
0.02%；Cerium: 0.072%；Lanthanum: 0.048%；Surplus is aluminium and trace impurity.
In another implementation of the embodiment of the present application, a kind of high thermal conductivity aluminum alloy materials are provided, mainly group
It is silicon, magnesium, iron, copper, manganese, strontium, cerium, lanthanum at element, remaining is aluminium and inevitable micro impurity element, wherein Ge Geyuan
The mass percent of element is respectively as follows: silicon: 7.2%；Magnesium: 0.4%；Iron: 0.5%；Copper: 0.05%；Manganese: 0.03%；Strontium:
0.02%；Cerium: 0.09%；Lanthanum: 0.06%；Surplus is aluminium and trace impurity.
Wherein, the micro impurity element in above-mentioned described aluminium alloy be mainly zinc, zirconium, titanium, boron, vanadium, cadmium, beryllium, chromium,
Nickel, lead, tin, antimony etc., and the mass percentage of every kind of impurity element needs to control below 0.015%.It should be understood that in order to
So that the content of impurity element controls within claimed range, it can be higher using purity when selection prepares the raw material of alloy pig
Raw material namely the lower raw material of impurity element.
To further illustrate that aluminium alloy provided by the embodiments of the present application can have both high-termal conductivity and good mechanical property,
Thermal conductivity test and Mechanics Performance Testing are carried out to the aluminium alloy that embodiment three is provided into embodiment five.Wherein, thermal conductivity
What test was carried out according to standard ASTM E1461, specifically, in the different component that above-described embodiment three to embodiment five provides
It is 12.7mm, the former built-in testing sample with a thickness of 3.0mm that the upper surface of aluminium alloy cast ingot, which cuts diameter, passes through laser heat conducting instrument pair
The thermal coefficient of each test sample is detected, and calculates acquisition thermal conductivity.Wherein, alloy thermal conductivity shown in table 3 is pair
Test sample carries out detected data after T5 heat treatment, specifically, carries out the T5 at 170 DEG C to test sample and is heat-treated,
Wherein, the incomplete artificial aging time is 2-4h.For convenience of description, test sample of the embodiment three into embodiment five is distinguished
Sample 1 is denoted as to sample 3.
Table 3
In addition, carrying out mechanics to as-cast aluminum alloy of the embodiment three into embodiment five according to international standard GB/T 228
The processing and test of tensile sample, wherein the sample for doing mechanical stretch test be by 170 DEG C of T5 heat treatment state samples,
Wherein the artificial aging time in T5 heat treatment process is 2-4h.Mechanics detection data is as shown in table 4.
Table 4
In addition, to measure the mobility of the aluminium alloy of different component provided by the embodiments of the present application, to embodiment three to reality
The aluminium alloy for applying the offer of example five carries out vacuum flow test, and by ADC12 alloy material as a comparison, passes through comparison flowing length
Degree, analyzes its mobility, and then obtain its casting character.Wherein, the vacuum flow experiment of each aluminum alloy materials measures
The results are shown in Table 5.
Table 5
In conjunction with table 3 to table 5 as can be seen that high thermal conductivity aluminum alloy materials casting fluidity sample provided by the embodiments of the present application
Length average out to 649.60mm, thermal conductivity can achieve 186.2W/ (mK), and tensile strength can achieve 297Mpa, elongation percentage
It can achieve 2.0%.Wherein, after by table 5 as it can be seen that being tested under the identical degree of superheat, embodiment three is into embodiment five
The length of flow of alloy can reach the 95% of ADC12 alloy flow length, wherein the average length of flow of sample 1 to sample 3
It can achieve 649.60mm, particularly, the length of flow of sample 1 can be up to 685mm, therefore, provided by the embodiments of the present application
High thermal conductivity aluminum alloy materials have good mobile performance.
According to high thermal conductivity aluminum alloy materials provided by the embodiments of the present application, arranged in pairs or groups by the design to aluminium alloy various elements
And its optimization of ratio so that alloy have following main performance: (1) the die casting state room temperature thermal conductivity of aluminium alloy be 170~
185W/mK (referring to table 3)；(2) there is good mechanical property, such as tensile strength, yield strength, elongation percentage and section shrinkage
Rate (referring to table 4)；(3) there is good mobility (referring to table 5) and stickness.
The embodiment of the present application also provides the preparation methods of above-mentioned high thermal conductivity aluminum alloy materials, illustratively, such as Fig. 1 institute
Show, which includes the following steps.
S101 carries out raw material configuration according to the ingredient of design, and carries out melting to the raw material using resistance melting equipment, obtains
Take alloy molten solution.Wherein, it can be filled with inert gas or nitrogen etc., into smelting equipment in fusion process to avoid alloy
Oxidation.Resistance melting equipment for example can be melting resistance furnace.
Alloy molten solution is poured into mold and obtains alloy pig by S102.Specifically, alloy molten solution is poured using pouring type
To obtain alloy pig into metal die cavity or in tensile sample metal mold, wherein the size and shape of alloy pig depend on gold
Belong to die cavity or tensile sample metal mold.Illustratively, the size of metal die cavity for example can be 80 × 20 × 15mm, stretch examination
It is 15mm that the size of sample metal mold, which for example can be diameter, and length is the cylindrical die of 120mm.It should be understood that by by alloy
The test sample for testing thermal conductivity and tension test can be made in melt indentation tensile sample metal mold.
In addition, after alloy pig is made, it can also be different using the cast aluminium alloy gold fluidity testing platform test alloy
Mobility and stickness under the degree of superheat.
Wherein, after obtaining mechanical property and thermal conductivity is all satisfied the aluminum alloy materials of demand, step can also be carried out
S103, that is, preparing die casting structure part through excess pressure casting after alloy pig is melted.
According to the preparation method of high thermal conductivity aluminum alloy materials provided by the embodiments of the present application, the aluminium alloy density of acquisition is about
2.68g/cm3, fusing point is about 612-616 DEG C, and die casting state thermal conductivity can achieve 170-185W/ (mK), and is passing through 170
At DEG C after the T5 processing of 2-4h, the intensity of the aluminium alloy can achieve 180-200Mpa.In addition, prepared aluminium alloy is same
Casting fluidity length under the degree of superheat or same pouring temperature is suitable with ADC12 alloy, even better than ADC12 alloy,
Stickness is suitable with ADC12.
In other words, the aluminium alloy of component provided by the embodiments of the present application has both high-termal conductivity and good mechanical property,
Suitable for preparing the complicated microdiecast components of terminal.
The embodiment of the present application also provides a kind of die casting structure part, the die casting structure part is real using the application described above
The high thermal conductivity aluminum alloy materials die casting for applying example offer forms.Since high thermal conductivity aluminum alloy materials provided by the embodiments of the present application can be with
It is provided simultaneously with high-termal conductivity and good mechanical property, so that structural member prepared therefrom also has both high-termal conductivity and excellent
Mechanical property, be suitable for end product, such as the small-sized customer premises equipment (customer- of the indoor and outdoor of terminal household user
Premises equipment, CPE), mobile phone terminal, home terminal tablet computer (portable android device,
The die casting structure part of products such as PAD).
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
Scope of the present application.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application should be based on the protection scope of the described claims.
Claims (12)
1. a kind of high thermal conductivity aluminum alloy materials, which is characterized in that the main component of the high thermal conductivity aluminum alloy materials be silicon, magnesium,
Iron, copper, manganese, strontium, compound rare-earth and aluminium, and according to mass percent meter, the aluminum alloy materials include following components:
Silicon: 6.0%-8.0%；Magnesium: 0.25%-0.5%；Iron: 0.5%-0.8%；Copper: 0-0.1%；Manganese: 0-0.04%；Strontium:
0-0.1%；Compound rare-earth 0-0.2%；Surplus is aluminium.
2. high thermal conductivity aluminum alloy materials according to claim 1, which is characterized in that according to mass percent meter, the height
Heat-conduction aluminum alloy material includes following components:
Silicon: 7.0%-7.2%；Magnesium: 0.25%-0.40%；Iron: 0.5%-0.6%；Copper: 0.05%-0.10%；Manganese:
0.03%-0.04%；Strontium: 0-0.02%；Compound rare-earth 0-0.15%；Surplus is aluminium.
3. high thermal conductivity aluminum alloy materials according to claim 1 or 2, which is characterized in that the compound rare-earth include cerium and
Lanthanum, and the mass percent of the cerium and lanthanum is 3:2.
4. high thermal conductivity aluminum alloy materials according to claim 3, which is characterized in that according to mass percent meter, the height
Heat-conduction aluminum alloy material includes following components:
Silicon: 7.0%；Magnesium: 0.25%；Iron: 0.6%；Copper: 0.1%；Manganese: 0.04%；Strontium: 0.015%；Cerium: 0.06%；Lanthanum:
0.04%；Surplus is aluminium.
5. high thermal conductivity aluminum alloy materials according to claim 3, which is characterized in that according to mass percent meter, the height
Heat-conduction aluminum alloy material includes following components:
Silicon: 7.0%；Magnesium: 0.35%；Iron: 0.57%；Copper: 0.06%；Manganese: 0.03%；Strontium: 0.02%；Cerium: 0.072%；Lanthanum:
0.048%；Surplus is aluminium.
6. high thermal conductivity aluminum alloy materials according to claim 3, which is characterized in that according to mass percent meter, the height
Heat-conduction aluminum alloy material includes following components:
Silicon: 7.2%；Magnesium: 0.4%；Iron: 0.5%；Copper: 0.05%；Manganese: 0.03%；Strontium: 0.02%；Cerium: 0.09%；Lanthanum:
0.06%；Surplus is aluminium.
7. high thermal conductivity aluminum alloy materials according to claim 1 to 6, which is characterized in that the aluminum alloy materials
It further include impurity element, and the mass percentage of every kind of impurity element is 0.015% hereinafter, the impurity element includes following
It is at least one:
Zinc, zirconium, titanium, boron, vanadium, cadmium, beryllium, chromium, nickel, lead, tin, antimony.
8. high thermal conductivity aluminum alloy materials described in any one of -7 according to claim 1, which is characterized in that the high thermal conductivity aluminium closes
Golden material is prepared by resistance melting mode.
9. high thermal conductivity aluminum alloy materials according to claim 8, which is characterized in that described to be prepared by resistance melting mode
During the high thermal conductivity aluminum alloy materials, inert gas or nitrogen are passed through into smelting equipment.
10. high thermal conductivity aluminum alloy materials according to claim 1 to 9, which is characterized in that the high thermal conductivity aluminium
Alloy material is used to prepare die casting structure part by compression casting mode.
11. a kind of preparation method of high thermal conductivity aluminum alloy materials characterized by comprising
Raw material is configured according to the component of the high thermal conductivity aluminum alloy materials as described in any one of claims 1 to 10；
Melting is carried out to the raw material by resistance melting equipment, and obtains alloy molten solution；
The alloy molten solution is poured into metal die, alloy pig is obtained.
12. a kind of die casting structure part, which is characterized in that the die casting structure part is used such as any one of claims 1 to 10 institute
The high thermal conductivity aluminum alloy materials die casting stated forms.
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