CN108823518A - A kind of preparation method of high thermal conductivity alusil alloy bar - Google Patents
A kind of preparation method of high thermal conductivity alusil alloy bar Download PDFInfo
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- CN108823518A CN108823518A CN201810731191.7A CN201810731191A CN108823518A CN 108823518 A CN108823518 A CN 108823518A CN 201810731191 A CN201810731191 A CN 201810731191A CN 108823518 A CN108823518 A CN 108823518A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- 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
- C22F1/043—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 of alloys with silicon as the next major constituent
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Abstract
A kind of preparation method of high thermal conductivity alusil alloy bar, is made by the steps：(1) Al-Si alloy pig is taken, upper and lower surface mills flat post-processing into cylinder, cleaning/cleaning aluminium ingot specimen surface；(2) the Al-Si alloy pig that step (1) processing is completed is put into heat-treatment furnace and carries out Homogenization Treatments；(3) ingot casting after the cooling period is put into the pre-add heat treatment before carrying out hot extrusion in heat-treatment furnace；(4) the uniformly heated ingot casting of step (3) is subjected to hot extrusion, extrusion ratio 25:1；(5) after hot extrusion, the Al-Si alloy bar material that hot extrusion obtains is reapposed into the progress T6 heat treatment in heat-treatment furnace.High thermal conductivity alloy of the invention thermal coefficient with higher, preferable mechanical property, excellent machining property, preparation method principle are reliable, the advantages that easy to operate and lower production cost, is highly suitable for the heat sink assembly in each field, has a vast market application prospect.
Description
Technical field
The present invention relates to the preparation methods of a kind of high thermal conductivity alusil alloy bar, in particular to a kind of by conventional cast aluminium silicon
Alloy hot extrusion is at bar and improves the preparation method of its thermal conductivity, belongs to the preparation method field of material.
Background technique
The application range of rods and bars of aluminium alloy is very extensive, can be used as structure-bearing in aerospace and auto industry
Part, can also be in industrial electric and household electrical appliance for forming the devices such as various wire rods, electrical component, conductor.Obviously, electrically
The rods and bars of aluminium alloy needed in field should have good thermal conductivity.At present pole, square rod equal-specification aluminium alloy mainly adopt
With the series of transformations aluminum alloy materials such as 1XXX-7XXX, in wrought aluminium alloy, although the wrought aluminium alloy of 1 system and 3 systems have it is good
Good heat dissipation effect, but the mechanical property of Chang Yinwei material is general and be deformed in use or corrosion occurs formed to lead to
The failure of hole and electrical component；And the thermal coefficient of preferable 5 system of mechanical property and 7 line aluminium alloys is then less desirable, heat dissipation
Effect be not it is very ideal, will lead to and need the component that radiates to influence it due to overheat to work normally or even scrap.This table
Bright, there is still a need for the materials for being largely provided simultaneously with high thermal conductivity and strong mechanical performance in the industries such as electrical, electromechanics to guarantee equipment
Normal operation, the present invention improves the premise of material mechanical performance using the excellent mechanics of casting Al-Si aluminium alloy at the same time
Under, so that material is generated plastic deformation with the thermal conductivity of raising Al-Si alloy by a relatively large margin by the method for hot extrusion, proposes
A kind of preparation method of high thermal conductivity alusil alloy bar.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of preparation method of high thermal conductivity alusil alloy bar, institute
The alusil alloy bar of acquisition has the high thermal conductivity aluminium alloy bars of excellent mechanical performances, high thermal conductivity and higher productivity
The preparation method of material.
Used specific technical solution is as follows in order to achieve the above purpose by the present invention：
A kind of preparation method of high thermal conductivity alusil alloy bar, is made by the steps：
The preparation method of high thermal conductivity alusil alloy bar, is made by the steps：
(1) the Al-Si alloy pig to hot extrusion is taken, upper and lower surface is milled into flat post-processing into cylinder, is cleared up and the Al- that polishes
Si alloy ingot surface；
(2) the Al-Si alloy pig that step (1) processing is completed is put into heat-treatment furnace and carries out Homogenization Treatments；
(3) the Al-Si alloy pig that step (2) processing is completed is put at the preheating before carrying out hot extrusion in heat-treatment furnace
Reason；
(4) the uniformly heated alloy pig of step (3) is subjected to hot extrusion using double rolling mills；
(5) after hot extrusion, the Al-Si alloy bar material that hot extrusion obtains is reapposed and carries out T6 in heat-treatment furnace
Processing.
Preferably, the Al-Si alloy in the step (1) is casting Al-Si alloy, and alloy state is casting
State.
Preferably, the Al-Si alloy in the step (1) is polished with 180 mesh emery papers.
Preferably, the Al-Si in the step (1) closes lower surface by being milled into, cylindrical shape is by turning
Processing or Wire-cut Electrical Discharge Machining form.
Preferably, the soaking temperature of Homogenization Treatments is 500-520 DEG C, soaking time 12-18h in step (2), it is cold
But mode is air-cooled.
Preferably, the heating temperature that pre-add is heat-treated in step (3) is 400-500 DEG C, soaking time 1h.
Preferably, the extrusion ratio during step (4) hot extrusion is 16:1-50:1.
Preferably, solid solubility temperature is 510-530 DEG C, solution time 6-8h, timeliness temperature in the T6 processing of step (5)
160-180 DEG C of degree, aging time 6-8h.
Preferably, in the T6 processing of step (5), solid solution is quenched by the way of water quenching after completing, and quenching is used
Water temperature is 60-80 DEG C.
Another object of the present invention is to provide it is a kind of by any of the above-described scheme the method be prepared have it is higher
The alusil alloy bar of thermal coefficient.
Compared with the prior art, the advantages of the present invention are as follows：With this method prepare high thermal conductivity alusil alloy bar simultaneously
Have higher thermal coefficient and good mechanical property, the comprehensive performance after material hot extrusion is more than base material, preparation side
Method principle is reliable, easy to operate, is very suitable to produce in enormous quantities, has a vast market application prospect.
Specific embodiment
Below according to embodiment and comparative example, the present invention is further explained.
Embodiment 1
In the present embodiment, the preparation method of high thermal conductivity aluminium alloy is as follows：Use the size of turnery processing for φ 40mm ×
The ADC12 alloy cast ingot of 120mm, the alloy cast ingot are obtained by founding mode, and the upper and lower surface milling of alloy cast ingot is smooth
Afterwards, clear up, clean alloy cast ingot surface, then with 180 mesh emery papers polishing ingot casting surface.ADC12 alloy cast ingot is put into case
Homogenization Treatments are carried out in formula heat-treatment furnace, Homogenization Treatments temperature is 500 DEG C, and the Homogenization Treatments time is 18h, then from heat
It takes out to be placed in air in treatment furnace and be cooled down.ADC12 alloy cast ingot after cooling is reentered into box heat treatment furnace
Middle progress pre-add heat treatment, the heating temperature of pre-add heat treatment are 400 DEG C, soaking time 1h.It will after the completion of pre-add heat treatment
ADC12 alloy cast ingot takes out from box heat treatment furnace, is put into mold and directly carries out hot extrusion.Heat is carried out using vertical extruder
It squeezes out, extrusion ratio 25:1, extrusion pressure 700MPa.After hot extrusion, the ADC12 alloy bar material of acquisition is placed again into
T6 processing (solid solution+timeliness) is carried out in box heat treatment furnace, solid solubility temperature is 510 DEG C, solution time 7h, after solid solution is completed
It is quenched by the way of water quenching, quenching water temperature is 80 DEG C, carries out ageing treatment, aging temp 170 after the completion of quenching
DEG C, aging time 7h after the completion of timeliness, is placed in air and is cooled down.Final high thermal conductivity alusil alloy bar is obtained to produce
Product.
The alusil alloy bar and original base material obtain to this method carries out Mechanics Performance Testing respectively, and it is anti-to measure its limit
Tensile strength is 290MPa, elongation 7.2%.The ultimate tensile strength of base material ADC12 alloy cast ingot is 220MPa, and elongation is
1.0%.
Further, heating conduction test is carried out to the alusil alloy bar and original base material of this method acquisition respectively, is surveyed
The thermal coefficient for obtaining ADC12 alusil alloy bar is 153 (W/mK), and the thermal coefficient of base material ADC12 alloy cast ingot is 97 (W/
m·K)。
57.73% is improved compared to base material using the heating conduction that alusil alloy bar is made in the embodiment of the present invention, limit is anti-
Tensile strength improves 31.82% compared to base material, and elongation improves 6 times compared to base material.
Comparative example 1
This comparative example carries out hot extrusion using ADC12 alloy cast ingot identical with 1 size of embodiment.Pairing in this comparative example
The treatment process of golden ingot casting is distinguished compared to the examples, without Homogenization Treatments before being only that hot extrusion, directly will processing
With hot extrusion after the ADC12 alloy cast ingot progress pre-add heat treatment after polishing, hot extrusion carries out T6 processing after completing.Preheating
Processing, hot extrusion, T6 treatment process parameter are consistent relative to embodiment 1, without modification.The aluminium silicon that this method is obtained
Alloy bar material carries out Mechanics Performance Testing and heating conduction test respectively, and the ultimate tensile strength for measuring alusil alloy bar is
272MPa, elongation 5.6%, thermal coefficient are 130 (W/mK).
Comparative example 2
This comparative example carries out hot extrusion using ADC12 alloy cast ingot identical with 1 size of embodiment.Pairing in this comparative example
The treatment process of golden ingot casting is distinguished compared to the examples, is only that hot extrusion is completed no longer to carry out T6 processing later.At homogenization
Reason, pre-add are heat-treated, the technological parameter of hot extrusion is consistent relative to embodiment 1, without modification.This method is obtained
Alusil alloy bar carries out Mechanics Performance Testing and heating conduction test respectively, measures the ultimate tensile strength of alusil alloy bar
For 233MPa, elongation 6.8%, thermal coefficient is 126 (W/mK).
Comparative example 3
This comparative example carries out hot extrusion using ADC12 alloy cast ingot identical with 1 size of embodiment.Pairing in this comparative example
The treatment process of golden ingot casting is distinguished compared to the examples, without Homogenization Treatments before being only that hot extrusion, directly will processing
With hot extrusion after the ADC12 alloy cast ingot progress pre-add heat treatment after polishing, hot extrusion also no longer carries out T6 processing after completing.
Pre-add is heat-treated, the technological parameter of hot extrusion is consistent relative to embodiment 1, without modification.The aluminium that this method is obtained
Silicon alloy bar carries out Mechanics Performance Testing and heating conduction test respectively, and the ultimate tensile strength for measuring alusil alloy bar is
219MPa, elongation 6.6%, thermal coefficient are 138 (W/mK).
Comparative example 4
This comparative example, which is directlyed adopt, carries out T6 processing with the identical ADC12 alloy cast ingot of embodiment 1, without centre
The technological parameter for the treatment of process, T6 processing is consistent relative to embodiment 1, without modification.The aluminium silicon that this method is obtained
Alloy carries out Mechanics Performance Testing and heating conduction test respectively, and the ultimate tensile strength for measuring alusil alloy bar is
267MPa, elongation 1.5%, thermal coefficient are 108 (W/mK).
Comparative example 5
Since ADC12 is aluminium diecasting alloy, this comparative example is directlyed adopt and the identical ADC12 die casting of embodiment 1
State alloy carries out Mechanics Performance Testing and heating conduction test respectively, and the ultimate tensile strength for measuring alusil alloy bar is
259MPa, elongation 1.1%, thermal coefficient are 95 (W/mK).
In comparison, it will be compared using product made from product made from the embodiment of the present invention and comparative example：It is thermally conductive
Coefficient, which compared with comparative example 1 improves 17.69%, ultimate tensile strength and improves 6.61%, elongation, improves 28.57%；It is thermally conductive
Coefficient, which compared with comparative example 2 improves 21.42%, ultimate tensile strength and improves 24.46%, elongation, improves 5.88%；It is thermally conductive
Coefficient, which compared with comparative example 3 improves 8.7%, ultimate tensile strength and improves 32.42%, elongation, improves 9.1%；Thermal coefficient
41.67%, ultimate tensile strength is improved compared with comparative example 4 improve 8.61%, elongation improve 4 times；Thermal coefficient is more right
Ratio 5, which improves 61.05%, ultimate tensile strength and improves 11.97%, elongation, improves 5 times
Above-mentioned embodiment is only a preferred solution of the present invention, so it is not intended to limiting the invention.Have
The those of ordinary skill for closing technical field can also make various changes without departing from the spirit and scope of the present invention
Change and modification.Therefore all mode technical solutions obtained for taking equivalent substitution or equivalent transformation, all fall within guarantor of the invention
It protects in range.
Claims (10)
1. a kind of preparation method of high thermal conductivity alusil alloy bar, which is characterized in that be made by the steps：
(1) the Al-Si alloy pig to hot extrusion is taken, upper and lower surface is milled into flat post-processing into cylinder, clears up and the Al-Si that polishes is closed
Ingot surface；
(2) the Al-Si alloy pig that step (1) processing is completed is put into heat-treatment furnace and carries out Homogenization Treatments；
(3) pre-add that the Al-Si alloy pig that step (2) processing is completed is put into before carrying out hot extrusion in heat-treatment furnace is heat-treated；
(4) the uniformly heated alloy pig of step (3) is subjected to hot extrusion using double rolling mills；
(5) after hot extrusion, the Al-Si alloy bar material that hot extrusion obtains is reapposed and is carried out at T6 in heat-treatment furnace
Reason.
2. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：The step
(1) the Al-Si alloy in is casting Al-Si alloy, and alloy state is casting state.
3. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：The step
(1) the Al-Si alloy in is polished with 180 mesh emery papers.
4. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：The step
(1) Al-Si in closes lower surface by being milled into, cylindrical shape by turnery processing or Wire-cut Electrical Discharge Machining and
At.
5. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：Step (2)
The soaking temperature of middle Homogenization Treatments is 500-520 DEG C, soaking time 12-18h, and the type of cooling is air-cooled.
6. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：Step (3)
The heating temperature of middle pre-add heat treatment is 300-500 DEG C, soaking time 1h.
7. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：Step (4)
Extrusion ratio during hot extrusion is 16:1-50:1.
8. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：Step (5)
T6 processing in, solid solubility temperature be 510-530 DEG C, solution time 6-8h, 160-180 DEG C of aging temp, aging time 6-8h.
9. a kind of preparation method of high thermal conductivity alusil alloy bar according to claim 1, it is characterised in that：Step (5)
T6 processing in, solid solution complete after quenched by the way of water quenching, quenching is 60-80 DEG C with water temperature.
10. a kind of high thermal conductivity alusil alloy bar as described in claim 1~9 either method.
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| CN201810731191.7A CN108823518B (en) | 2018-07-05 | 2018-07-05 | Preparation method of high-thermal-conductivity aluminum-silicon alloy bar |
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| CN201810731191.7A CN108823518B (en) | 2018-07-05 | 2018-07-05 | Preparation method of high-thermal-conductivity aluminum-silicon alloy bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113403508A (en) * | 2021-06-22 | 2021-09-17 | 江苏豪然喷射成形合金有限公司 | Heat treatment process for spray-formed high-silicon wear-resistant aluminum alloy |
| CN113680993A (en) * | 2021-09-16 | 2021-11-23 | 漳州市兴达辉机械有限公司 | Casting process of connecting cross rod of treadmill handle |
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| CN103725933A (en) * | 2013-12-17 | 2014-04-16 | 芜湖万润机械有限责任公司 | Preparation method of aluminium alloy section for diesel engine piston |
| CN104781434A (en) * | 2012-11-19 | 2015-07-15 | 株式会社神户制钢所 | Aluminum alloy material for high-pressure hydrogen gas containers and method for producing same |
| CN107492794A (en) * | 2017-08-31 | 2017-12-19 | 国网河南省电力公司西峡县供电公司 | One kind sealing heat-conducting type outdoor power cabinet |
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| CN104781434A (en) * | 2012-11-19 | 2015-07-15 | 株式会社神户制钢所 | Aluminum alloy material for high-pressure hydrogen gas containers and method for producing same |
| CN103725933A (en) * | 2013-12-17 | 2014-04-16 | 芜湖万润机械有限责任公司 | Preparation method of aluminium alloy section for diesel engine piston |
| CN107492794A (en) * | 2017-08-31 | 2017-12-19 | 国网河南省电力公司西峡县供电公司 | One kind sealing heat-conducting type outdoor power cabinet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113403508A (en) * | 2021-06-22 | 2021-09-17 | 江苏豪然喷射成形合金有限公司 | Heat treatment process for spray-formed high-silicon wear-resistant aluminum alloy |
| CN113680993A (en) * | 2021-09-16 | 2021-11-23 | 漳州市兴达辉机械有限公司 | Casting process of connecting cross rod of treadmill handle |
| CN113680993B (en) * | 2021-09-16 | 2022-11-08 | 漳州市兴达辉机械有限公司 | Casting process of connecting cross rod of treadmill handle |
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