CN107739916A - A kind of hot thin-walled pack alloy of high-strength highly-conductive and preparation method thereof - Google Patents
A kind of hot thin-walled pack alloy of high-strength highly-conductive and preparation method thereof Download PDFInfo
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- CN107739916A CN107739916A CN201711260472.0A CN201711260472A CN107739916A CN 107739916 A CN107739916 A CN 107739916A CN 201711260472 A CN201711260472 A CN 201711260472A CN 107739916 A CN107739916 A CN 107739916A
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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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
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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Abstract
The present invention relates to hot thin-walled pack alloy of a kind of high-strength highly-conductive and preparation method thereof, the alloy includes Si：12wt% 14wt%；Cu：0.05wt% 3wt%；Fe：0.40wt% 0.80wt%；Mg：0.00wt% 0.5wt%, remaining Control of Impurities is in below 0.05wt%, surplus Al.Compared with prior art, the present invention is heat-treated by strictly controlling Cu, Mg total amount between 0.05 3wt%, then by 175 DEG C/4h, and such Cu, Mg element will not be dissolved and intrinsic silicon, material internal is formed the CuAl of micro disperse2Second phase and Mg17Al12Second phase.Fe elements can prevent material sticking to mould, more effectively cast thin-wall product.Meanwhile these second phases can effectively lift the intensity of material so that its tensile strength is more than 300MPa, and yield strength is more than 150MPa, elongation percentage 8 10%.
Description
Technical field
The present invention relates to a kind of aluminium alloy, more particularly, to a kind of hot thin-walled pack alloy of high-strength highly-conductive and its preparation side
Method.
Background technology
Silver is best Heat Conduction Material, next to that copper, gold and aluminium.But due to gold, silver price too expensive, it is impossible to big
Scale uses.The radiating effect of copper is ideal by contrast, but copper has the shortcomings that one very big：The resistance of deformation of copper
Greatly, it is difficult to the section bar for being squeezed into compound section, is manufactured according to hot investment casting, welding or machining technique, will cause to process
Difficulty is big, the problems such as high processing costs.Therefore usual fin is formed using aluminium alloy extruded more.
1 ××× system alloy and 6 ××× system alloys all have the higher capacity of heat transmission.But due to wanting for following process
Ask, fin material needs have certain intensity, and because the section configuration of fin is extremely complex, it is necessary to which alloy has well
Plasticity could smooth extrusion molding, 6 ××× system alloys are with its excellent combination property and as the first choice of fin material.
Material of 6063 aluminium alloys as manufacture fin in Al-Mg-Si system alloy is widely used in the market, it
With good plasticity, the excellent combination property such as medium intensity, mature production technology are simple and obtained the green grass or young crops of production firm
Look at.But as industry development, the caloric values such as new energy, 4G/5G communications, photovoltaic are significantly increased, merely using 6063
Aluminum alloy heat sink can not meet the requirement of the combination properties such as product strength, radiating, complexity, cost, thus, it is badly in need of exploitation
It is a be provided simultaneously with high intensity, high heat conduction, can die cast complex thin-wall parts aluminum alloy materials.
Research shows that intensity and the high heat conduction of general aluminum alloy materials are conflicts, common lifting intensity of aluminum alloy
Method, including crystal grain refinement, alloying, solid solution element, accelerate material cooling velocity the methods of.However, crystal grain refinement can increase
Add rotten nucleus number, electronics is increased by difficulty, the conduction of aluminium alloy, heat conductivility weaken；More alloying elements, can shadow
The uniformity and degree of purity of body tissue are rung, thus, in addition to producing the second phase separation, almost all of alloying element can all drop
Low-alloyed thermal conductivity.
By adding 10% or so Si elements in aluminium alloy, the casting flowing of aluminum alloy materials can be effectively lifted
Property, simultaneously, moreover it is possible to ensure the high thermal conductivity of aluminum alloy materials, but the intensity of this aluminum alloy materials is still relatively low.Therefore,
How by high heat conduction Al-Si line aluminium alloys, adding certain alloying element, ensureing the little bar of heat conductivility reduction
Under part, its intensity is obviously improved, so as to as high-performance high heat conduction Al-alloy material of future generation.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of high-strength highly-conductive heat is thin
Wall pressure cast aluminium alloy and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions：A kind of hot thin-walled pack alloy of high-strength highly-conductive,
Characterized in that, the alloy includes Si：12.00wt%-14.00wt%；Cu：0.05wt%-3wt%；Fe：0.40wt%-
0.80wt%, Mg：0.00wt%-0.5wt%；Remaining Control of Impurities is in below 0.05wt%, surplus Al.
Described alloy includes Si：12.20-13.00wt%；Cu：0.25-0.50wt%；Fe：0.40-0.60wt%；
Mg：0.05-0.3wt%, remaining Control of Impurities is in below 0.05wt%, surplus Al.
Cu is added in the form of intermediate alloy in described alloy, is specifically：Commercially available Cu intermediate alloys are processed as the length of side
For 10mm cube, with metal aluminum foil, by it, all parcel wherein, after addition uses pressing plate in 300-500Mpa after 110 DEG C of dryings
It is completely forced under pressure in aluminium liquid.
Described Mg is added with simple substance form：Mg simple substance is processed as the cube that the length of side is 10mm, used after 110 DEG C of dryings
By it, all parcel wherein, is completely forced into aluminium liquid metal aluminum foil after addition with pressing plate under 300-500Mpa pressure.
Described Fe is added in the form of intermediate alloy, is specifically：It is 2-3mm that commercially available Fe intermediate alloys are pressed into thickness in advance
Laminar plate, add the specific surface area of material, accelerate the dissolving of Fe intermediate alloys.
Described Si is added in the form of simple substance：After Si pure metals are preheated into 500 DEG C, then put into aluminium liquid；By Si
Pure metals are more rapidly and uniformly dissolved in aluminium liquid.
A kind of preparation method of the hot thin-walled pack alloy of high-strength highly-conductive, it is characterised in that comprise the following steps：
1) as proportioning calculate needed for intermediate alloy quality, stocked up, alloying element Fe, Cu are in the form of intermediate alloy
Addition, Mg, Si are added in the form of simple substance or intermediate alloy；
2) after aluminium ingot surface clean is clean, aluminium ingot is put into smelting furnace or shaft furnace crucible and carries out melting, smelting temperature
For 690-710 DEG C；
3) when temperature of aluminum liquid reaches 750 DEG C, Fe, Cu intermediate alloy after drying are added in aluminium liquid, are incubated 15-
20min；The feed postition of wherein Cu intermediate alloys is：By commercially available Cu intermediate alloys be processed as the length of side be 10mm cube, 110
DEG C dry after with metal aluminum foil by its all parcel wherein, be completely forced into after addition with pressing plate under 300-500Mpa pressure
In aluminium liquid, the feed postition of Fe intermediate alloys is：Commercially available Fe intermediate alloys are pressed into the laminar plate that thickness is 2-3mm in advance, then
Put into aluminium liquid；
4) aluminium liquid is cooled to 720 DEG C, and Mg simple substance and Si simple substance are added in aluminium liquid together, insulation, is incubated 15-20min；
The feed postition of wherein Mg simple substance is：Mg simple substance is processed as the cube that the length of side is 10mm, metal aluminum foil is used after 110 DEG C of dryings
By it, all parcel wherein, is completely forced into aluminium liquid after addition with pressing plate under 300-500Mpa pressure, and Si simple substance adds
Entering mode is：After Si pure metals are preheated into 500 DEG C, then put into aluminium liquid；
5) raw material all fusing after, it is refined successively, pull out slag, cast, obtain aluminium alloy castings.
Refining described in step (5) is under the conditions of 720 DEG C, is carried out using the special refining agent of aluminium alloy；Cool after refining
To 700 DEG C of insulations, 5 minutes are stood, field trash is sufficiently floated or is sunk, then carries out pulling out slag, removes surface scale
And impurities at bottom.
The special refining agent of described aluminium alloy uses upper marine rainbow light Metal Melting factory, and HGJ-2 aluminium alloys refine scarfing cinder without sodium
Agent.The alloy does not add any alterant.This is due to that common alterant is by refining grain size, to reach lifting material
Expect intensity and the purpose of elongation percentage, and study and show that the reduction of material grains size is detrimental to the heat conductivility lifting of material
, therefore, the material does not add alterant, increases the insulation time of repose of material as far as possible, extends material solidification speed to be lifted
Scantling；Pass through the CuAl of a large amount of Dispersed precipitates simultaneously2Second phase and Mg17Al12Second phase come lifted the strength of materials with extension
Rate, and step (5) terminate after obtained die-cast product by 175 DEG C, 4h heat treatment, further diffusion-precipitation distribution second
Phase, and crystal grain is grown up.
Temperature of aluminum liquid after refining is down to 680 DEG C and prepares cast by step (5), using metal gravity pouring technology, is poured
Injection molding tool is warming up to 200 DEG C in an oven, and aluminium liquid is added among mould with scoop and is molded, and after mould cooling, casting takes out,
Detect heat conduction and mechanical property.
The aluminium alloy of the present invention prepares basic demand：1. strictly control Cu content makes between 0.05-0.3wt%
Material internal forms the CuAl of micro disperse2Second phase；2. strictly control Mg content makes material between 0.05-0.5wt%
It is internally formed the Mg of micro disperse17Al12Second phase；3. strictly control Cu, Mg total amount makes material between 0.05-3wt%
It is internally formed the Mg of micro disperse17Al12Second phase；4. the material completed for proportioning carries out 175 DEG C, 4h heat treatments.
Compared with prior art, the present invention has advantages below：
1. the performance of aluminium alloy of the present invention can reach：Yield strength>300MPa, tensile strength>150MPa, stretching
>8%, thermal conductivity factor>195W/(m·K).
2. it is heat-treated by strictly controlling Cu, Mg total amount between 0.05-3wt%, then by 175 DEG C/4h, so
Cu, Mg element will not be dissolved and intrinsic silicon, material internal is formed the CuAl of micro disperse2Second phase and Mg17Al12Second
Phase.Fe elements can prevent material sticking to mould, more effectively cast thin-wall product.Meanwhile these second phases can be lifted effectively
The intensity of material so that its tensile strength is more than 300MPa, and yield strength is more than 150MPa, elongation percentage 8-10%.
Brief description of the drawings
Fig. 1 is a kind of stress-strain curve diagram of the hot thin-walled pack alloy of high-strength highly-conductive
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1-13：
A kind of hot thin-walled pack alloy of high-strength highly-conductive, includes the composition of weight/mass percentage composition described in table 1 below, and surplus is
Aluminium and inevitable impurity.
Each element content table in the aluminium alloy that table 1 is embodiment 1-13
The preparation method of aluminium alloy described in the various embodiments described above is：
1) as proportioning calculate needed for intermediate alloy quality, stocked up, alloying element Fe, Cu are in the form of intermediate alloy
Addition, Mg, Si are added in the form of simple substance or intermediate alloy；
2) after aluminium ingot surface clean is clean, aluminium ingot is put into smelting furnace or shaft furnace crucible and carries out melting, smelting temperature
For 690-710 DEG C；
3) when temperature of aluminum liquid reaches 750 DEG C, Fe, Cu intermediate alloy after drying are added in aluminium liquid, are incubated 15-
20min；The feed postition of wherein Cu intermediate alloys is：By commercially available Cu intermediate alloys be processed as the length of side be 10mm cube, 110
DEG C dry after with metal aluminum foil by its all parcel wherein, be completely forced into after addition with pressing plate under 300-500Mpa pressure
In aluminium liquid, the feed postition of Fe intermediate alloys is：Commercially available Fe intermediate alloys are pressed into the laminar plate that thickness is 2-3mm in advance, then
Put into aluminium liquid；
4) aluminium liquid is cooled to 720 DEG C, and Mg simple substance and Si simple substance are added in aluminium liquid together, insulation, is incubated 15-20min；
The feed postition of wherein Mg simple substance is：Mg simple substance is processed as the cube that the length of side is 10mm, metal aluminum foil is used after 110 DEG C of dryings
By it, all parcel wherein, is completely forced into aluminium liquid after addition with pressing plate under 300-500Mpa pressure, and Si simple substance adds
Entering mode is：After Si pure metals are preheated into 500 DEG C, then put into aluminium liquid；
5) raw material all fusing after, it is refined successively, pull out slag, cast, obtain aluminium alloy castings.Described refining be
Under the conditions of 720 DEG C, carried out using the special refining agent of aluminium alloy；700 DEG C of insulations are cooled to after refining, stand 5 minutes, make field trash
Sufficiently float or sink, then carry out pulling out slag, remove surface scale and impurities at bottom.Described volume cast is by aluminium liquid
Temperature is down to 680 DEG C and prepares cast, and using metal gravity pouring technology, casting mold is warming up to 200 DEG C in an oven, materials
Aluminium liquid is added among mould by spoon to be molded, and after mould cooling, casting takes out, and detects heat conduction and mechanical property.
Wherein, refinement step is carried out under the conditions of 720 DEG C of temperature of aluminum liquid using the special refining agent of aluminium alloy.Refining process
It is middle that with refining spoon, stirring certain time makes alloy refining abundant up and down.700 DEG C of insulations are cooled to after refining, stand 5 minutes, make folder
Debris sufficiently floats or sunk, and then carries out pulling out slag.
6) by the die-cast product that step (5) obtains by 175 DEG C, 4h heat treatment.
The embodiment 1-13 of table 1 aluminium alloy castings heat conduction and mechanical property
The heat conductivility of common pack alloy is about 90W/ (mK), heat conduction after the die casting of existing high heat conduction aluminium alloy
Performance is also only 140W/ (mK), and the hot thin-walled pack alloy of high-strength highly-conductive of the invention is obviously improved heat conductivility 40%.
Fig. 1 is the ess-strain stress strain curve figure of embodiment 1, and as can be seen from the figure the hot thin-walled die casting aluminium of high-strength highly-conductive closes
Golden yield strength is up to 150-160MPa, than common its yield strength of high heat conduction aluminium alloy 120MPa liftings 30%, solves
The problem on deformation of high heat conduction pack alloy shell.
Claims (10)
1. a kind of hot thin-walled pack alloy of high-strength highly-conductive, it is characterised in that the alloy includes Si：12.00wt%-
14.00wt%；Cu：0.05wt%-3wt%；Fe：0.40wt%-0.80wt%, Mg：0.00wt%-0.5wt%；Remaining impurity
Control is in below 0.05wt%, surplus Al.
A kind of 2. hot thin-walled pack alloy of high-strength highly-conductive according to claim 1, it is characterised in that described alloy bag
Include Si：12.80-13.80wt%；Cu：0.25-0.50wt%；Fe：0.40-0.60wt%；Mg：0.05-0.3wt%, remaining is miscellaneous
Quality Control system is in below 0.05wt%, surplus Al.
A kind of 3. hot thin-walled pack alloy of high-strength highly-conductive according to claim 1 or 2, it is characterised in that described conjunction
Cu is added in the form of intermediate alloy in gold, is specifically：Commercially available Cu intermediate alloys are processed as the cube that the length of side is 10mm,
With metal aluminum foil, by it, all parcel is wherein, complete by its under 300-500Mpa pressure with pressing plate after addition after 110 DEG C of dryings
It is pressed into aluminium liquid.
A kind of 4. hot thin-walled pack alloy of high-strength highly-conductive according to claim 1 or 2, it is characterised in that described Mg
Added with simple substance form：Mg simple substance is processed as the cube that the length of side is 10mm, with metal aluminum foil by its whole after 110 DEG C of dryings
Parcel wherein, is completely forced into aluminium liquid after addition with pressing plate under 300-500Mpa pressure.
A kind of 5. hot thin-walled pack alloy of high-strength highly-conductive according to claim 1 or 2, it is characterised in that described conjunction
Fe is added in the form of intermediate alloy in gold:Commercially available Fe intermediate alloys are pressed into thickness in advance and are 2-3mm laminar plate, then are put into
In aluminium liquid.
A kind of 6. hot thin-walled pack alloy of high-strength highly-conductive according to claim 1 or 2, it is characterised in that described Si
Added in the form of simple substance, wherein after Si pure metals are preheated into 500 DEG C, then put into aluminium liquid.
A kind of 7. preparation method of the hot thin-walled pack alloy of high-strength highly-conductive as claimed in claim 1 or 2, it is characterised in that
Comprise the following steps：
1) as proportioning calculate needed for intermediate alloy quality, stocked up, alloying element Fe, Cu are added in the form of intermediate alloy
Add, Mg, Si are added in the form of simple substance or intermediate alloy；
2) after aluminium ingot surface clean is clean, aluminium ingot is put into smelting furnace or shaft furnace crucible and carries out melting, smelting temperature is
690-710℃；
3) when temperature of aluminum liquid reaches 750 DEG C, Fe, Cu intermediate alloy after drying are added in aluminium liquid, are incubated 15-20min；
The feed postition of wherein Cu intermediate alloys is：Commercially available Cu intermediate alloys are processed as the cube that the length of side is 10mm, 110 DEG C of dryings
With metal aluminum foil, by it, all parcel wherein, aluminium liquid is completely forced into after addition with pressing plate under 300-500Mpa pressure afterwards
In, the feed postition of Fe intermediate alloys is：Commercially available Fe intermediate alloys are pressed into thickness in advance and are 2-3mm laminar plate, then are put into
In aluminium liquid；
4) aluminium liquid is cooled to 720 DEG C, and Mg simple substance and Si simple substance are added in aluminium liquid together, insulation, is incubated 15-20min；Wherein
The feed postition of Mg simple substance is：By Mg simple substance be processed as the length of side be 10mm cube, after 110 DEG C of dryings with metal aluminum foil by its
All parcel wherein, is completely forced into aluminium liquid, the addition side of Si simple substance after addition with pressing plate under 300-500Mpa pressure
Formula is：After Si pure metals are preheated into 500 DEG C, then put into aluminium liquid；
5) raw material all fusing after, it is refined successively, pull out slag, cast, obtain aluminium alloy castings.
8. the preparation method of the hot thin-walled pack alloy of high-strength highly-conductive according to claim 7, it is characterised in that step
(5) refining described in is under the conditions of 720 DEG C, is carried out using the special refining agent of aluminium alloy；Be cooled to after refining 700 DEG C of insulations,
5 minutes are stood, field trash is sufficiently floated or is sunk, then carries out pulling out slag；Then alterant is added at 700 DEG C to carry out
Metamorphism treatment, 10 minutes are stood after stirring fully, slag is pulled out after standing, removes surface scale and impurities at bottom.
9. the preparation method of the hot thin-walled pack alloy of high-strength highly-conductive according to claim 8, it is characterised in that described
The special refining agent of aluminium alloy uses upper marine rainbow light Metal Melting factory, and HGJ-2 aluminium alloys refine slag-cleaning agent without sodium.
10. the preparation method of the hot thin-walled pack alloy of high-strength highly-conductive according to claim 7, it is characterised in that step
(5) temperature of aluminum liquid after refining, going bad is down to 680 DEG C and prepares cast, using metal gravity pouring technology, casting mold exists
200 DEG C are warming up in baking oven, aluminium liquid is added among mould with scoop and is molded.
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| CN201711260472.0A CN107739916B (en) | 2017-12-04 | 2017-12-04 | High-strength high-thermal-conductivity thin-wall die-casting aluminum alloy and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796317A (en) * | 2018-06-25 | 2018-11-13 | 苏州慧驰轻合金精密成型科技有限公司 | Suitable for new-energy automobile can semi-solid squeeze casting aluminium alloy and preparation method |
| CN109097642A (en) * | 2018-06-25 | 2018-12-28 | 苏州慧驰轻合金精密成型科技有限公司 | Suitable for sharing the high-strength and high ductility die-cast aluminum alloy material and preparation method of bicycle |
| CN109338179A (en) * | 2018-11-29 | 2019-02-15 | 苏州慧驰轻合金精密成型科技有限公司 | A kind of high thermal conductivity heat treatment pack alloy and preparation method thereof |
| CN109396381A (en) * | 2018-11-20 | 2019-03-01 | 吴江市格瑞福金属制品有限公司 | A kind of physical deterioration semisolid pressure casting preparation method of high thermal conductivity baking tray |
| CN109468496A (en) * | 2018-12-28 | 2019-03-15 | 苏州慧金新材料科技有限公司 | A kind of heat-proof compression casting aluminium alloy and preparation method thereof |
| CN109852853A (en) * | 2019-04-01 | 2019-06-07 | 苏州大学 | Tough radiation aluminium alloy material of a kind of thin-wall die casting height and preparation method thereof |
| CN113151717A (en) * | 2021-03-24 | 2021-07-23 | 辽宁忠旺集团有限公司 | 6063 aluminum alloy casting and production process thereof |
| CN114438377A (en) * | 2021-12-29 | 2022-05-06 | 苏州慧金新材料科技有限公司 | High-strength and high-toughness die-casting aluminum alloy for new energy automobile and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108796317A (en) * | 2018-06-25 | 2018-11-13 | 苏州慧驰轻合金精密成型科技有限公司 | Suitable for new-energy automobile can semi-solid squeeze casting aluminium alloy and preparation method |
| CN109097642A (en) * | 2018-06-25 | 2018-12-28 | 苏州慧驰轻合金精密成型科技有限公司 | Suitable for sharing the high-strength and high ductility die-cast aluminum alloy material and preparation method of bicycle |
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| CN109396381A (en) * | 2018-11-20 | 2019-03-01 | 吴江市格瑞福金属制品有限公司 | A kind of physical deterioration semisolid pressure casting preparation method of high thermal conductivity baking tray |
| CN109338179A (en) * | 2018-11-29 | 2019-02-15 | 苏州慧驰轻合金精密成型科技有限公司 | A kind of high thermal conductivity heat treatment pack alloy and preparation method thereof |
| CN109468496A (en) * | 2018-12-28 | 2019-03-15 | 苏州慧金新材料科技有限公司 | A kind of heat-proof compression casting aluminium alloy and preparation method thereof |
| CN109852853A (en) * | 2019-04-01 | 2019-06-07 | 苏州大学 | Tough radiation aluminium alloy material of a kind of thin-wall die casting height and preparation method thereof |
| CN113151717A (en) * | 2021-03-24 | 2021-07-23 | 辽宁忠旺集团有限公司 | 6063 aluminum alloy casting and production process thereof |
| CN114438377A (en) * | 2021-12-29 | 2022-05-06 | 苏州慧金新材料科技有限公司 | High-strength and high-toughness die-casting aluminum alloy for new energy automobile and preparation method thereof |
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| CN107739916B (en) | 2021-01-15 |
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