CN105220023B - Aluminum alloy heat dissipating material suitable for LEDs as well as preparing method and usage thereof - Google Patents
Aluminum alloy heat dissipating material suitable for LEDs as well as preparing method and usage thereof Download PDFInfo
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- CN105220023B CN105220023B CN201510746527.3A CN201510746527A CN105220023B CN 105220023 B CN105220023 B CN 105220023B CN 201510746527 A CN201510746527 A CN 201510746527A CN 105220023 B CN105220023 B CN 105220023B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 120
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 120
- 229910052790 beryllium Inorganic materials 0.000 claims abstract description 83
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims abstract description 83
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 67
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000007670 refining Methods 0.000 claims abstract description 56
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 14
- 238000003723 Smelting Methods 0.000 claims abstract description 13
- 239000004411 aluminium Substances 0.000 claims description 98
- 229910052751 metal Inorganic materials 0.000 claims description 88
- 239000002184 metal Substances 0.000 claims description 88
- 239000007788 liquid Substances 0.000 claims description 33
- 239000002893 slag Substances 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 29
- 239000002994 raw material Substances 0.000 claims description 28
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 23
- VHHHONWQHHHLTI-UHFFFAOYSA-N hexachloroethane Chemical compound ClC(Cl)(Cl)C(Cl)(Cl)Cl VHHHONWQHHHLTI-UHFFFAOYSA-N 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000006229 carbon black Substances 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 238000010792 warming Methods 0.000 claims description 11
- 229960000892 attapulgite Drugs 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910052625 palygorskite Inorganic materials 0.000 claims description 10
- 238000005275 alloying Methods 0.000 claims description 9
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 239000012856 weighed raw material Substances 0.000 claims description 5
- 238000010309 melting process Methods 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 7
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- -1 aluminium Scandium Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses an aluminum alloy heat dissipating material suitable for LEDs as well as a preparing method and a usage thereof. The aluminum alloy heat dissipating material is prepared through smelting the following alloy elements in percent by mass: 0.8-4.5% of beryllium, 0.08-0.15% of scandium, 0.02-0.06% of cadmium and the balance of aluminum and is obtained through a series of steps: furnace burden preparation, furnace burden pretreatment, smelting treatment and refining pouring. The thermal conductivity of the aluminum alloy heat dissipating material prepared through doping a certain quantity of beryllium, scandium and cadmium into pure aluminum is about 223-232W/(m.K) at 25DEG C. Under the same test conditions (test environment, power, current and the like), compared with AZ91 magnesium alloy, the aluminum alloy heat dissipating material has the advantages that the junction temperature is lowered by 1.94-2.85DEG C, 1000h luminance depreciation is reduced by 1.96-2.53%, the service life is prolonged by 15.3-18.9%, and great heat dissipating performance is displayed.
Description
Technical field
The present invention relates to led technical field of heat dissipation, specifically a kind of aluminium alloy heat sink material being applied to led and its preparation
Method and purposes.
Background technology
Led (light emitting diode, light emitting diode) is a kind of can to convert electrical energy into consolidating of visible ray
The semiconductor device of state.Led has the features such as energy-saving and environmental protection, life-span length, small volume, can be widely applied to various instructions, shows
Show, decorate, the field such as backlight, general lighting and urban landscape.But the sustainable development of current led industry still faces technology and chooses
War, wherein led radiating is a problem demanding prompt solution！LED lamp is high to cooling requirements, and the LED lamp fault having 70% is because dissipating
Heat causes not in time, and the heat 90% that led produces is to external diffusion by conduction pattern.Affect the pass in LED lamp life-span at present
Key is quality light source and whole lamp radiating effect, needs exploitation high-performance heat sink material badly.
On traditional material, the thermal conductivity highest of copper, is good heat sink material, but the high cost of copper, density are big, limit
Its application on a heat sink；The thermal conductivity of aluminum is higher, cost is relatively low, is the main material of radiator；The thermal conductivity of magnesium is compared with copper
Poor with aluminum, but the heat dispersion of magnesium alloy is better than copper alloy and aluminium alloy.Therefore, before the thermal conductivity effect ensureing aluminium alloy
Put, the heat dispersion how improving aluminium alloy is the problem of urgent need to resolve.
Content of the invention
It is an object of the invention to provide a kind of aluminium alloy heat sink material of the good heat dissipation effect being applied to led and its preparation
Method and purposes.
For achieving the above object, the following technical scheme of present invention offer:
A kind of aluminium alloy heat sink material being applied to led, is formed by the alloying element melting of following mass percent: beryllium
0.8～4.5%, scandium 0.08～0.15%, cadmium 0.02～0.06%, balance of aluminum.
As the further scheme of the present invention: quality purity >=99.8% of described aluminum.
As the further scheme of the present invention: formed by the alloying element melting of following mass percent: beryllium 1.8～
3.5%th, scandium 0.10～0.12%, cadmium 0.03～0.05%, balance of aluminum.
As the further scheme of the present invention: formed by the alloying element melting of following mass percent: beryllium 2.8%, scandium
0.10%th, cadmium 0.04%, balance of aluminum.
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by being weighed
The 0.25～0.28% of raw material gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First
Coverture raw material by mass percentage is made up of white carbon black 70～78% and Vermiculitum 22～30%；Percent mass pressed by second coverture
The raw material of ratio is made up of limestone 30～45% and attapulgite 55～70%；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed,
And metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and graininess
Metal scandium is preheated to 300～400 DEG C, pulverizes and deposits in 95～110 prepare first coverture, the second coverture respectively
DEG C drying baker in be dried 3～5 hours；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
80～85% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, continue to rise
Temperature to 1050～1100 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment graininess
Metallic beryllium, is sufficiently stirred for, and adds remaining metallic aluminium after granular metal beryllium fine melt, adds step 2 after metallic aluminium fine melt) in
The granular metal scandium of pretreatment, is sufficiently stirred for, and adds cadmium metal, stir, so after granular metal scandium fine melt
After spread one layer of second coverture and cover liquid level, in order to avoid pool burning and oxidative phenomena occur；
4) refine cast: temperature is adjusted to 750～780 DEG C, carries out refining treatment, refining time with hexachlorethane refining agent
For 25～30min, repeatedly stir in refining process, stand 15～20min after refine, finally temperature is adjusted to 720～750 DEG C and enters
Row drags for slag, directly pours into the aluminium alloy preparing in mould, the demoulding after cooling, obtain aluminum after polish after dragging for slag
Alloy heat-sink material.
Purposes in preparing led heat sink section bar for the described aluminium alloy heat sink material.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention passes through to mix the metal of the metallic beryllium, high intensity and plasticity of a certain amount of highly thermally conductive high specific heat in fine aluminium
Scandium, the cadmium metal compared with high-tensile and wearability, make a kind of aluminium alloy heat sink material, under the conditions of 25 DEG C, this aluminium alloy
The thermal conductivity of heat sink material is about 223～232w/ (m k), (experimental enviroment, electrical power, electric current under same test conditions
Deng), with respect to az91 magnesium alloy, the junction temperature of this aluminium alloy heat sink material have dropped 1.94～2.85 DEG C, 10000h light decay
Have dropped 1.96～2.53%, service life extends 15.3～18.9%, show good heat dispersion.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of aluminium alloy heat sink material being applied to led, by the alloy unit of following mass percent
Plain melting forms: beryllium 0.8%, scandium 0.08%, cadmium 0.02%, balance of aluminum (quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by being weighed
The 0.28% of raw material gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First coverture
Raw material by mass percentage is made up of white carbon black 70% and Vermiculitum 30%；Second coverture raw material by mass percentage is by Calx
Stone 30% and attapulgite 70% form；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed,
And metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and graininess
Metal scandium is preheated to 300 DEG C, pulverizes and deposits in 95 DEG C of drying baker the prepare first coverture, the second coverture respectively
Interior drying 5 hours；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
80% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1050 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, add remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in pretreatment
Granulated metal scandium, is sufficiently stirred for, and adds cadmium metal, stir after granular metal scandium fine melt, then spreads one layer the
Two covertures cover liquid level, in order to avoid pool burning and oxidative phenomena；
4) refine cast: temperature is adjusted to 750 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
30min, stirs in refining process repeatedly, stands 15min, finally temperature is adjusted to 720 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Embodiment 2
In the embodiment of the present invention, a kind of aluminium alloy heat sink material being applied to led, by the alloy unit of following mass percent
Plain melting forms: beryllium 4.5%, scandium 0.15%, cadmium 0.06%, balance of aluminum (quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by being weighed
The 0.25% of raw material gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First coverture
Raw material by mass percentage is made up of white carbon black 78% and Vermiculitum 22%；Second coverture raw material by mass percentage is by Calx
Stone 45% and attapulgite 55% form；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed,
And metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and graininess
Metal scandium is preheated to 400 DEG C, pulverizes and deposits in 110 DEG C of drying the prepare first coverture, the second coverture respectively
It is dried 3 hours in case；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
85% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1100 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, add remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in pretreatment
Granulated metal scandium, is sufficiently stirred for, and adds cadmium metal, stir after granular metal scandium fine melt, then spreads one layer the
Two covertures cover liquid level, in order to avoid pool burning and oxidative phenomena；
4) refine cast: temperature is adjusted to 780 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
25min, stirs in refining process repeatedly, stands 20min, finally temperature is adjusted to 750 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Embodiment 3
In the embodiment of the present invention, a kind of aluminium alloy heat sink material being applied to led, by the alloy unit of following mass percent
Plain melting forms: beryllium 0.8%, scandium 0.15%, cadmium 0.06%, balance of aluminum (quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by being weighed
The 0.26% of raw material gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First coverture
Raw material by mass percentage is made up of white carbon black 74% and Vermiculitum 26%；Second coverture raw material by mass percentage is by Calx
Stone 38% and attapulgite 62% form；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed,
And metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and graininess
Metal scandium is preheated to 350 DEG C, pulverizes and deposits in 105 DEG C of drying the prepare first coverture, the second coverture respectively
It is dried 4 hours in case；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
82% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1080 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, add remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in pretreatment
Granulated metal scandium, is sufficiently stirred for, and adds cadmium metal, stir after granular metal scandium fine melt, then spreads one layer the
Two covertures cover liquid level, in order to avoid pool burning and oxidative phenomena；
4) refine cast: temperature is adjusted to 760 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
28min, stirs in refining process repeatedly, stands 18min, finally temperature is adjusted to 740 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Embodiment 4
In the embodiment of the present invention, a kind of aluminium alloy heat sink material being applied to led, by the alloy unit of following mass percent
Plain melting forms: beryllium 4.5%, scandium 0.08%, cadmium 0.02%, balance of aluminum (quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by being weighed
The 0.26% of raw material gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First coverture
Raw material by mass percentage is made up of white carbon black 74% and Vermiculitum 26%；Second coverture raw material by mass percentage is by Calx
Stone 38% and attapulgite 62% form；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed,
And metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and graininess
Metal scandium is preheated to 350 DEG C, pulverizes and deposits in 105 DEG C of drying the prepare first coverture, the second coverture respectively
It is dried 4 hours in case；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
82% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1080 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, add remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in pretreatment
Granulated metal scandium, is sufficiently stirred for, and adds cadmium metal, stir after granular metal scandium fine melt, then spreads one layer the
Two covertures cover liquid level, in order to avoid pool burning and oxidative phenomena；
4) refine cast: temperature is adjusted to 760 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
28min, stirs in refining process repeatedly, stands 18min, finally temperature is adjusted to 740 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Embodiment 5
In the embodiment of the present invention, a kind of aluminium alloy heat sink material being applied to led, by the alloy unit of following mass percent
Plain melting forms: beryllium 2.8%, scandium 0.10%, cadmium 0.04%, balance of aluminum quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by being weighed
The 0.26% of raw material gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First coverture
Raw material by mass percentage is made up of white carbon black 74% and Vermiculitum 26%；Second coverture raw material by mass percentage is by Calx
Stone 38% and attapulgite 62% form；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed,
And metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and graininess
Metal scandium is preheated to 350 DEG C, pulverizes and deposits in 105 DEG C of drying the prepare first coverture, the second coverture respectively
It is dried 4 hours in case；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
82% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1080 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, add remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in pretreatment
Granulated metal scandium, is sufficiently stirred for, and adds cadmium metal, stir after granular metal scandium fine melt, then spreads one layer the
Two covertures cover liquid level, in order to avoid pool burning and oxidative phenomena；
4) refine cast: temperature is adjusted to 760 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
28min, stirs in refining process repeatedly, stands 18min, finally temperature is adjusted to 740 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Comparative example 1
A kind of aluminium alloy heat sink material being applied to led, is formed by the alloying element melting of following mass percent: beryllium
2.8%th, cadmium 0.04%, balance of aluminum quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium and cadmium metal according to required element proportioning, by the total matter of weighed raw material
The 0.26% of amount weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；Quality hundred pressed by first coverture
The raw material dividing ratio is made up of white carbon black 74% and Vermiculitum 26%；Second coverture raw material by mass percentage is by limestone 38% He
Attapulgite 62% forms；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, cadmium metal carry out oil removing, blast is processed, and by metal
Beryllium is ground into the graininess of particle diameter≤1mm；Metallic aluminium, cadmium metal, granular metal beryllium are preheated to 350 DEG C, will prepare respectively
The first good coverture, the second coverture are pulverized and are deposited in 105 DEG C of drying baker and be dried 4 hours；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
82% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1080 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, adds remaining metallic aluminium after granular metal beryllium fine melt, adds cadmium metal after metallic aluminium fine melt, is sufficiently stirred for all
Even, then spread one layer of second coverture and cover liquid level, in order to avoid pool burning and oxidative phenomena occur；
4) refine cast: temperature is adjusted to 760 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
28min, stirs in refining process repeatedly, stands 18min, finally temperature is adjusted to 740 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Comparative example 2
A kind of aluminium alloy heat sink material being applied to led, is formed by the alloying element melting of following mass percent: beryllium
2.8%th, scandium 0.10%, balance of aluminum quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium according to required element proportioning, by the total matter of weighed raw material
The 0.26% of amount weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；Quality hundred pressed by first coverture
The raw material dividing ratio is made up of white carbon black 74% and Vermiculitum 26%；Second coverture raw material by mass percentage is by limestone 38% He
Attapulgite 62% forms；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium carry out oil removing, blast is processed, and by metal
Beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；Metallic aluminium, granular metal beryllium and granular metal scandium are preheated to 350
DEG C, respectively the prepare first coverture, the second coverture are pulverized and deposited in 105 DEG C of drying baker and be dried 4 hours；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
82% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1080 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, add remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in pretreatment
Granulated metal scandium, stirs, and then spreads one layer of second coverture and covers liquid level, in order to avoid pool burning and aoxidizing existing
As；
4) refine cast: temperature is adjusted to 760 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
28min, stirs in refining process repeatedly, stands 18min, finally temperature is adjusted to 740 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Comparative example 3
A kind of aluminium alloy heat sink material being applied to led, is formed by the alloying element melting of following mass percent: beryllium
2.8%, balance of aluminum quality purity >=99.8%).
The preparation method of the described aluminium alloy heat sink material being applied to led, comprises the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium according to required element proportioning, by weighed raw material gross mass
0.26% weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First coverture is by mass percentage
Raw material be made up of white carbon black 74% and Vermiculitum 26%；Second coverture raw material by mass percentage is by limestone 38% and concavo-convex
Rod soil 62% composition；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium carries out oil removing, blast processes, and metallic beryllium is pulverized
Become the graininess of particle diameter≤1mm；Metallic aluminium and granular metal beryllium are preheated to 350 DEG C, cover prepare first respectively
Agent, the second coverture are pulverized and are deposited in 105 DEG C of drying baker and be dried 4 hours；
3) melting is processed: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) middle preheating
82% metallic aluminium, be warming up to metallic aluminium and be molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1080 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium, fully
Stirring, adds remaining metallic aluminium after granular metal beryllium fine melt, stirs, then spread one layer of second coverture and cover
, in order to avoid pool burning and oxidative phenomena in lid liquid level；
4) refine cast: temperature is adjusted to 760 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is
28min, stirs in refining process repeatedly, stands 18min, finally temperature is adjusted to 740 DEG C and carries out dragging for slag after refine, will after dragging for slag
The aluminium alloy preparing directly pours in mould, the demoulding after cooling, obtains aluminium alloy heat sink material after polish.
Under the conditions of 25 DEG C, the aluminium alloy heat sink material that foregoing invention embodiment 1～5 and comparative example 1～3 are obtained enters
The test of row thermal conductivity, the result recording is as shown in table 1 below.
Additionally, with az91 magnesium alloy for contrast, the aluminum that foregoing invention embodiment 1～5 and comparative example 1～3 are obtained closes
Golden heat sink material carries out thermal diffusivity test, and experimental condition is: 5wled lamp, driving current 1000ma；Conduction time 87～
140min；Sampling interval 5s；Light direction level；Heat dissipation environment Indoor Natural convection current.Result of the test is as shown in table 1 below.
By data in table 1 it can be seen that under the conditions of 25 DEG C, the thermal conductivity of the aluminium alloy heat sink material of present invention preparation is big
It is about 223～232w/ (m k)；With respect to az91 magnesium alloy, the junction temperature of this aluminium alloy heat sink material have dropped 1.94～
2.85 DEG C, 10000h light decay have dropped 1.96～2.53%, and service life extends 15.3～18.9%, shows good dissipating
Hot property.
The performance comparison of table 1 each group
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment only wraps
Containing an independent technical scheme, only for clarity, those skilled in the art should for this narrating mode of description
Using description as an entirety, the technical scheme in each embodiment can also form those skilled in the art through appropriately combined
Understandable other embodiment.
Claims (6)
1. a kind of aluminium alloy heat sink material being applied to led is it is characterised in that alloying element melting by following mass percent
Form: beryllium 0.8～4.5%, scandium 0.08～0.15%, cadmium 0.02～0.06%, balance of aluminum；Its preparation method, including following
Step:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by weighed raw material
The 0.25～0.28% of gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First covering
Agent raw material by mass percentage is made up of white carbon black 70～78% and Vermiculitum 22～30%；Second coverture is by mass percentage
Raw material is made up of limestone 30～45% and attapulgite 55～70%；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed, and will
Metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and granular metal
Scandium is preheated to 300～400 DEG C, pulverizes and deposits in 95～110 DEG C the prepare first coverture, the second coverture respectively
It is dried 3～5 hours in drying baker；
3) melting process: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) in preheating 80
～85% metallic aluminium, is warming up to metallic aluminium and is molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1050～1100 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal beryllium,
Be sufficiently stirred for, add remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in pretreatment
Granular metal scandium, be sufficiently stirred for, after granular metal scandium fine melt add cadmium metal, stir, then spread one
Layer second coverture covers liquid level；
4) refine cast: temperature is adjusted to 750～780 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is 25
～30min, stirs in refining process repeatedly, stands 15～20min, finally temperature is adjusted to 720～750 DEG C and is dragged for after refine
Slag, after dragging for slag directly pours into the aluminium alloy preparing in mould, and the demoulding after cooling obtains aluminium alloy after polish
Heat sink material.
2. the aluminium alloy heat sink material being applied to led according to claim 1 is it is characterised in that the quality of described aluminum is pure
Degree >=99.8%.
3. the aluminium alloy heat sink material being applied to led according to claim 1 is it is characterised in that by following percent mass
The alloying element melting of ratio forms: beryllium 1.8～3.5%, scandium 0.10～0.12%, cadmium 0.03～0.05%, balance of aluminum.
4. the aluminium alloy heat sink material being applied to led according to claim 1 is it is characterised in that by following percent mass
The alloying element melting of ratio forms: beryllium 2.8%, scandium 0.10%, cadmium 0.04%, balance of aluminum.
5. the preparation method according to the arbitrary described aluminium alloy heat sink material being applied to led of Claims 1 to 4, its feature exists
In comprising the following steps:
1) furnace charge prepares: weighs metallic aluminium, metallic beryllium, metal scandium and cadmium metal according to required element proportioning, by weighed raw material
The 0.25～0.28% of gross mass weighs hexachlorethane refining agent, prepares the first coverture and the second coverture；First covering
Agent raw material by mass percentage is made up of white carbon black 70～78% and Vermiculitum 22～30%；Second coverture is by mass percentage
Raw material is made up of limestone 30～45% and attapulgite 55～70%；
2) furnace charge pretreatment: by ready metallic aluminium, metallic beryllium, metal scandium, cadmium metal carries out oil removing, blast is processed, and will
Metallic beryllium, metal scandium are ground into the graininess of particle diameter≤1mm；By metallic aluminium, cadmium metal, granular metal beryllium and granular metal
Scandium is preheated to 300～400 DEG C, pulverizes and deposits in 95～110 DEG C the prepare first coverture, the second coverture respectively
It is dried 3～5 hours in drying baker；
3) melting process: graphite crucible is put into and is preheated in smelting furnace after kermesinus, be initially charged in step 2) in preheating 80
～85% metallic aluminium, is warming up to metallic aluminium and is molten into aluminium liquid, drag for slag immediately, then sprinkle the first coverture, be continuously heating to
1050～1100 DEG C, remove aluminium liquid surface on the first coverture, be subsequently adding step 2) in pretreatment granular metal
Beryllium, is sufficiently stirred for, and adds remaining metallic aluminium after granular metal beryllium fine melt, after metallic aluminium fine melt add step 2) in locate in advance
The granular metal scandium of reason, is sufficiently stirred for, and adds cadmium metal, stir, then spread after granular metal scandium fine melt
One layer of second coverture covers liquid level；
4) refine cast: temperature is adjusted to 750～780 DEG C, carries out refining treatment with hexachlorethane refining agent, refining time is 25
～30min, stirs in refining process repeatedly, stands 15～20min, finally temperature is adjusted to 720～750 DEG C and is dragged for after refine
Slag, after dragging for slag directly pours into the aluminium alloy preparing in mould, and the demoulding after cooling obtains aluminium alloy after polish
Heat sink material.
6. purposes in preparing led heat sink section bar for the described aluminium alloy heat sink material as arbitrary in Claims 1 to 4.
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| CN201611111837.9A CN106399763B (en) | 2015-11-03 | 2015-11-03 | It is a kind of suitable for LED aluminium alloy heat sink material as well as preparation method and application thereof |
| CN201611107898.8A CN106636773B (en) | 2015-11-03 | 2015-11-03 | A kind of aluminium alloy heat sink material as well as preparation method and application thereof suitable for LED |
| CN201510746527.3A CN105220023B (en) | 2015-11-03 | 2015-11-03 | Aluminum alloy heat dissipating material suitable for LEDs as well as preparing method and usage thereof |
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| KR101143899B1 (en) * | 2009-08-19 | 2012-05-11 | (주)상문 | An aluminum alloy for die casting having thermal conductivity |
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| CN105220023A (en) | 2016-01-06 |
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