CN107587020B - A kind of high thermal conductivity magnesium alloy and preparation method thereof - Google Patents
A kind of high thermal conductivity magnesium alloy and preparation method thereof Download PDFInfo
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 28
- 239000000956 alloy Substances 0.000 claims abstract description 28
- 238000005266 casting Methods 0.000 claims abstract description 26
- 239000011777 magnesium Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 13
- 229910052718 tin Inorganic materials 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 9
- 238000005275 alloying Methods 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 238000009749 continuous casting Methods 0.000 claims abstract description 5
- 239000000155 melt Substances 0.000 claims abstract description 4
- 238000003723 Smelting Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 7
- 238000005242 forging Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000011282 treatment Methods 0.000 claims description 5
- 238000004512 die casting Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 3
- 229910018131 Al-Mn Inorganic materials 0.000 abstract description 2
- 229910018461 Al—Mn Inorganic materials 0.000 abstract description 2
- 239000011701 zinc Substances 0.000 description 12
- 239000011572 manganese Substances 0.000 description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000011825 aerospace material Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- KBMLJKBBKGNETC-UHFFFAOYSA-N magnesium manganese Chemical compound [Mg].[Mn] KBMLJKBBKGNETC-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- Continuous Casting (AREA)
- Conductive Materials (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention belongs to metal material field of magnesium alloy, and in particular to a kind of Mg-Zn-Sn-Al-Mn high thermal conductivity magnesium alloy and preparation method thereof.The component content of the magnesium alloy are as follows: Zn is 3~6wt.%, and Sn is 1~4wt.%, and Al is 0.1~1.0wt.%, and Mn is 0.1~0.5wt.%, remaining is Mg and inevitable impurity element, impurity content < 0.05wt.%.Using iron crucible melting Mg, after pure magnesium all melts, sequentially adds preheated pure metal Zn, Sn, Al and Mg-10wt.%Mn intermediate alloy and carry out alloying, ingot casting or deformation ingot blank are cast by metal die or Semi-continuous casting crystallizer.For high thermal conductivity magnesium alloy of the invention under the conditions of 25 DEG C, casting and modified product thermal conductivity are at 120W (mK)‑1More than, and alloy casting state mechanical property: tensile strength >=200MPa, yield strength >=100MPa, elongation after fracture >=7%；Deformation performance: tensile strength >=250MPa, yield strength >=150MPa, elongation after fracture >=10%.To be fully able to meet the needs of fields such as national defence, electronics, communication.
Description
Technical field
The invention belongs to metal material field of magnesium alloy, and in particular to a kind of Mg-Zn-Sn-Al-Mn high thermal conductivity magnesium alloy and
Preparation method.
Background technique
The cooling system structure material of power supply, electronic device etc. in higher power LED systems, large-scale communication base station and aerospace
Material, had both needed excellent heating conduction, it is necessary to have the characteristics that density is small, intensity is high.Therefore, selection has excellent thermally conductive
The structural material of performance and mechanical performance, it appears particularly important.Magnesium alloy as structural metallic materials most light in practical application,
Have the characteristics that specific strength, specific stiffness height, good heat conductivity.Under room temperature, the thermal conductivity of pure magnesium is 155W (mK)-1, but it is strong
Spend low, only 90MPa or so is not able to satisfy the requirement of mechanical property.And after improving alloy strength by addition alloying element,
Heating conduction is remarkably decreased again, and at present in addition to the magnesium alloy for partially adding valuable rare earth or silver, thermal conductivity is generally lower than 100W
(m·K)-1。
Summary of the invention
The object of the present invention is to provide a kind of high thermal conductivity magnesium alloy and preparation method thereof, the alloy strength and thermal conductivity all compare
It is higher, it can satisfy the demand in the fields such as national defence, electronics, communication.
Technical scheme is as follows:
A kind of high thermal conductivity magnesium alloy, the component content of the magnesium alloy are as follows: Zn is 3~6wt.%, and Sn is 1~4wt.%, Al
It is 0.1~0.5wt.% for 0.1~1.0wt.%, Mn, remaining is Mg and inevitable impurity element, impurity content <
0.05wt.%.
The high thermal conductivity magnesium alloy, the as-cast characteristic of the magnesium alloy: yield strength >=100MPa, tensile strength >=
200MPa, elongation percentage >=7%.
The high thermal conductivity magnesium alloy, the deformation performance of the magnesium alloy: yield strength >=150MPa, tensile strength >=
250MPa, elongation percentage >=10%.
The high thermal conductivity magnesium alloy, under the conditions of 25 DEG C, casting and modified product thermal conductivity are at 120W (mK)-1
More than.
The preparation method of the high thermal conductivity magnesium alloy, sequentially includes the following steps:
(1) iron crucible melting Mg is used, smelting temperature is 730 ± 5 DEG C, after pure magnesium all melts, sequentially adds preheating
Good pure metal Zn, Sn, Al and Mg-10wt.%Mn intermediate alloy carries out alloying, and pure magnesium fusing and alloying process are all made of
Mix CO2And SF6As protective gas, stirring skim and stands 5~after twenty minutes, alloy melt temperature is transferred to 700~720
DEG C, it is cast using metal die or Semi-continuous casting crystallizer, forms ingot casting or ingot blank is used in deformation；
(2) ingot casting is put into 730 ± 5 DEG C of remeltings in smelting furnace or Smelting furnace for pressure casting, after being completely melt, 700 ± 5 DEG C of heat preservations,
Gravitational casting or die casting are carried out, required casting is made；
(3) after deformation is processed into plate, profile or various forging using rolling, extruding or forging technology with ingot blank,
Homogenize treatment process: 335 ± 1 DEG C keep the temperature 3~5 hours, then heat to 440 ± 1 DEG C and keep the temperature 3~5 hours, take out warm water and quench
Fire.
The preparation method of the high thermal conductivity magnesium alloy, in step (3), alloy deformation temperature is 350~380 DEG C.
The preparation method of the high thermal conductivity magnesium alloy, Zn purity 99.99wt.% or more, Sn purity 99.99wt.% with
On, Al purity 99.95wt.% or more.
The preparation method of the high thermal conductivity magnesium alloy mixes CO by volume percentage2And SF6In, CO299% is accounted for,
SF6Account for 1%.
The preparation method of the high thermal conductivity magnesium alloy, the water temperature of warm water quenching are 30~60 DEG C.
It advantages of the present invention and has the beneficial effect that:
1, high thermal conductivity magnesium alloy of the present invention, casting and deformation performance are all very good, under the conditions of 25 DEG C, casting and change
Shape product thermal conductivity is at 120W (mK)-1More than, and alloy casting state mechanical property: tensile strength >=200MPa, surrender are strong
Degree >=100MPa, elongation after fracture >=7%；Deformation performance: tensile strength >=250MPa, yield strength >=150MPa are had no progeny and are prolonged
Stretch rate >=10%.The present invention, which provides high thermal conductivity magnesium alloy, can be applied to the fields such as national defence, electronics, communication, be fully able to meet big
The cooling system structure material property of power supply, electronic device etc. is wanted in power LED device, large-scale communication base station and aerospace
It asks.
2, compared with existing heat conductive magnesium alloy, the present invention has at low cost, applied widely, mechanical property and heating conduction
All obtain marked improvement.
Detailed description of the invention
Fig. 1 is high thermal conductivity Magnesium Alloy photo.
Fig. 2 is high thermal conductivity magnesium alloy mechanical property curve；Wherein, abscissa Elongation represents elongation percentage (%), indulges
Coordinate Tensile strength represents tensile strength (MPa).Cast-1 represents as-cast specimen 1, and Cast-2 represents as-cast specimen
2, Extrusion-1 represent As-extruded sample 1, and Extrusion-2 represents As-extruded sample 2.
Fig. 3 is high thermal conductivity magnesium alloy thermal conductivity curve；Wherein, Cast represents as cast condition, and Extrusion represents As-extruded.
Specific embodiment
In the specific implementation process, steps are as follows for the preparation method of high thermal conductivity magnesium alloy of the present invention:
1) using pure magnesium ingot, pure zinc ingot, pure tin ingot, fine aluminium ingot and magnesium manganese intermediate alloy as raw material, according to alloy design group
Divide content to carry out ingredient, and is put into drying box and is preheated to 200 DEG C or so.
2) iron crucible melting Mg is used, smelting temperature is 730 DEG C, after pure magnesium all melts, is sequentially added preheated
Pure metal Zn, Sn, Al and Mg-10wt.%Mn intermediate alloy carries out alloying, keeps the temperature 15~20min, all after fusing, skims
And be blown into high-purity argon gas and refine 3~5min, 5~20min is stood, alloy melt temperature is transferred to 700~720 DEG C, using metal
Mold or Semi-continuous casting crystallizer are cast into ingot casting or deformation ingot blank.In pure magnesium fusing and alloying process, it is all made of mixed
Close CO2And SF6As protective gas.
3) ingot casting is put into 730 DEG C of remeltings in smelting furnace or Smelting furnace for pressure casting, after being completely melt, 700 DEG C of heat preservations carry out gravity
Casting or die casting, are made required casting；
4) deformation is processed into ingot blank by plate, profile or various forging using rolling, extruding or forging technology, uniformly
Change treatment process: 335 ± 1 DEG C keep the temperature 4 hours, then heat to 440 ± 1 DEG C and keep the temperature 4 hours, take out warm water quenching.Alloy becomes
Shape temperature is 350~380 DEG C.
The as-cast characteristic index of the magnesium alloy are as follows: 100~150MPa of yield strength, 200~250MPa of tensile strength extend
Rate 7~20%.The deformation performance of the magnesium alloy: 150~200MPa of yield strength, 250~300MPa of tensile strength, elongation percentage 10
~20%.Under the conditions of 25 DEG C, casting and 120~150W of modified product thermal conductivity (mK)-1。
The present invention will be described in detail combined with specific embodiments below.
Embodiment 1
In the present embodiment, high thermal conductivity magnesium alloy each component and its weight percent are as follows: 4.0%Zn, 2.5%Sn, 1.0%
Al, 0.5%Mn, remaining is Mg and inevitable impurity element, impurity content < 0.05%.
In the present embodiment, high thermal conductivity magnesium alloy the preparation method is as follows:
(1) ingredient: raw material uses metal Mg, metal Zn, metal Sn, metal Al and Mg-10wt.%Mn intermediate alloy, closes
Golden each component and its weight percent are as follows: 4.0%Zn, 2.5%Sn, 1.0%Al, 0.5%Mn, remaining is Mg；
(2) melting: iron crucible is used, the melting in resistance furnace, control smelting temperature is 730 DEG C, using CO2And SF6Mixing
(volume percentage, 99%CO are pressed as protective gas2+ 1%SF6), raw material is preheated at 200 DEG C, is firstly added metal Mg, gold
Belong to Mg all after fusing, Mg-Mn intermediate alloy is added, melting 15 minutes, is eventually adding metal Zn, Sn and Al, melting 10 minutes,
Obtain alloy melt；
(3) it is poured: obtained alloy melt air blowing (high-purity argon) being stirred 2~3 minutes, skims and stands 10~15 minutes
Afterwards, temperature is transferred to 700 DEG C of quick and stable casting, obtains ingot casting；
The as cast condition Mg-4.0Zn-2.5Sn-1.0Al-0.5Mn magnesium alloy yield strength that the present embodiment prepares is
120.0MPa, tensile strength 220.0MPa, elongation percentage 18%, thermal conductivity are 122W (mK)-1。
Embodiment 2
In the present embodiment, high thermal conductivity magnesium alloy each component and its weight percent are as follows: 3.5%Zn, 2.0%Sn, 0.8%
Al, 0.3%Mn, remaining is Mg and inevitable impurity element, impurity content < 0.05%.
In the present embodiment, high thermal conductivity magnesium alloy the preparation method is as follows:
(1) ingredient: raw material uses metal Mg, metal Zn, metal Sn, metal Al and Mg-10wt.%Mn intermediate alloy, closes
Golden each component and its weight percent are as follows: 3.5%Zn, 2.0%Sn, 0.8%Al, 0.3%Mn, remaining is Mg；
(2) melting: iron crucible is used, the melting in resistance furnace, control smelting temperature is 730 DEG C, using CO2And SF6Mixing
(volume percentage, 99%CO are pressed as protective gas2+ 1%SF6), raw material is preheated at 200 DEG C, is firstly added metal Mg, gold
Belong to Mg all after fusing, Mg-Mn intermediate alloy is added, melting 15 minutes, is eventually adding metal Zn, Sn and Al, melting 10 minutes,
Obtain alloy melt；
(3) it is poured: obtained alloy melt air blowing (high-purity argon) being stirred 2~3 minutes, skims and stands 10~15 minutes
Afterwards, temperature is transferred to 700 DEG C and obtains deformation ingot blank using semi-continuous casting；
(4) deformation is subjected to Homogenization Treatments, treatment process with ingot blank are as follows: 335 ± 1 DEG C keep the temperature 4 hours, then heat to
440 ± 1 DEG C keep the temperature 4 hours, take out warm water quenching, and the water temperature of warm water quenching is 50 DEG C.By the ingot blank extrusion molding after homogenization,
Profile is made, squeezing temperature is 350~380 DEG C.
The As-extruded Mg-3.5Zn-2.0Sn-0.8Al-0.3Mn magnesium alloy yield strength that the present embodiment prepares is
180.0MPa, tensile strength 283.5MPa, elongation percentage 16%, thermal conductivity are 125W (mK)-1。
As shown in Figure 1, can be seen that as-cast structure coarse grains from high thermal conductivity Magnesium Alloy photo, and uneven, squeeze
Alloy grain attenuates after compressive strain, produces a large amount of recrystallized structure.
As shown in Fig. 2, from high thermal conductivity magnesium alloy mechanical property curve it can be seen that cast alloy average tensile strength reaches
228MPa, elongation percentage reach 18%；As-extruded alloy average tensile strength reaches 280MPa, and elongation percentage reaches 20%.
As shown in figure 3, can be seen that alloy thermal conductivity from high thermal conductivity magnesium alloy thermal conductivity curve is both greater than 120W (m
K)-1, heating conduction is very good.
Finally, it should be noted that technical side the above examples are only used to illustrate the technical scheme of the present invention and are not limiting
Case, although applicant describes the invention in detail referring to preferred embodiment, those skilled in the art should be managed
Solution, modification or equivalent replacement of the technical solution of the present invention are made for those, without departing from the objective and range of the technical program,
It should all cover among scope of the presently claimed invention.
Claims (5)
1. a kind of preparation method of high thermal conductivity magnesium alloy, which is characterized in that the component content of the magnesium alloy are as follows: Zn be 3~
6wt.%, Sn are 1~4wt.%, and Al is 0.1~0.8wt.%, and Mn is 0.1~0.5wt.%, remaining is for Mg and inevitably
Impurity element, impurity content < 0.05wt.%；
The as-cast characteristic index of the magnesium alloy are as follows: 100~150MPa of yield strength, 200~250MPa of tensile strength, elongation percentage 7
~20%；The deformation performance of the magnesium alloy: 150~200MPa of yield strength, 250~300MPa of tensile strength, elongation percentage 10~
20%；Under the conditions of 25 DEG C, casting and 120~150W of modified product thermal conductivity (mK)-1；
The preparation method of the high thermal conductivity magnesium alloy, sequentially includes the following steps:
(1) iron crucible melting Mg is used, smelting temperature is 730 ± 5 DEG C, after pure magnesium all melts, is sequentially added preheated
Pure metal Zn, Sn, Al and Mg-10wt.%Mn intermediate alloy carries out alloying, and pure magnesium fusing and alloying process are all made of mixing
CO2And SF6As protective gas, stirring skim and stands 5~after twenty minutes, alloy melt temperature is transferred to 700~720 DEG C, is adopted
It is cast with metal die or Semi-continuous casting crystallizer, forms ingot casting or ingot blank is used in deformation；
(2) ingot casting is put into 730 ± 5 DEG C of remeltings in smelting furnace or Smelting furnace for pressure casting, after being completely melt, 700 ± 5 DEG C of heat preservations are carried out
Required casting is made in gravitational casting or die casting；
(3) after deformation is processed into plate, profile or various forging using rolling, extruding or forging technology with ingot blank, homogenization
Treatment process: 335 ± 1 DEG C keep the temperature 3~5 hours, then heat to 440 ± 1 DEG C and keep the temperature 3~5 hours, take out warm water quenching.
2. the preparation method of high thermal conductivity magnesium alloy described in accordance with the claim 1, which is characterized in that in step (3), alloy deformation
Temperature is 350~380 DEG C.
3. the preparation method of high thermal conductivity magnesium alloy described in accordance with the claim 1, which is characterized in that Zn purity 99.99wt.% with
On, Sn purity 99.99wt.% or more, Al purity 99.95wt.% or more.
4. the preparation method of high thermal conductivity magnesium alloy described in accordance with the claim 1, which is characterized in that press volume percentage, mix
Close CO2And SF6In, CO2Account for 99%, SF6Account for 1%.
5. the preparation method of high thermal conductivity magnesium alloy described in accordance with the claim 1, which is characterized in that the water temperature of warm water quenching is 30
~60 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1670230A (en) * | 2004-03-16 | 2005-09-21 | 焦作市黄河镁合金有限公司 | Magnesium alloy |
| CN1995425A (en) * | 2006-12-29 | 2007-07-11 | 清华大学 | Magnesium alloy and its preparation method |
| CN101871068A (en) * | 2009-04-24 | 2010-10-27 | 中国科学院金属研究所 | High-strength high-plasticity magnesium alloy comprising tin and aluminium and preparation method thereof |
| CN103667838A (en) * | 2014-01-03 | 2014-03-26 | 重庆大学 | Mg-Sn-Mn system wrought magnesium alloy and preparation method thereof |
| CN103695741A (en) * | 2013-12-16 | 2014-04-02 | 中国科学院金属研究所 | Mg-Zn-Al-Sn-Mn series magnesium alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100509648B1 (en) * | 2003-05-23 | 2005-08-24 | 연우인더스트리(주) | High formability the Magnesium alloy and manufacture method of the Magnesium alloy product thereof |
| EP2864514B1 (en) * | 2012-06-26 | 2020-04-29 | Biotronik AG | Implant made from a magnesium alloy, method for the production thereof and use thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1670230A (en) * | 2004-03-16 | 2005-09-21 | 焦作市黄河镁合金有限公司 | Magnesium alloy |
| CN1995425A (en) * | 2006-12-29 | 2007-07-11 | 清华大学 | Magnesium alloy and its preparation method |
| CN101871068A (en) * | 2009-04-24 | 2010-10-27 | 中国科学院金属研究所 | High-strength high-plasticity magnesium alloy comprising tin and aluminium and preparation method thereof |
| CN103695741A (en) * | 2013-12-16 | 2014-04-02 | 中国科学院金属研究所 | Mg-Zn-Al-Sn-Mn series magnesium alloy and preparation method thereof |
| CN103667838A (en) * | 2014-01-03 | 2014-03-26 | 重庆大学 | Mg-Sn-Mn system wrought magnesium alloy and preparation method thereof |
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