CN109136700A - High thermal conductivity magnesium alloy, inverter case, inverter and automobile - Google Patents
High thermal conductivity magnesium alloy, inverter case, inverter and automobile Download PDFInfo
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- CN109136700A CN109136700A CN201710459562.6A CN201710459562A CN109136700A CN 109136700 A CN109136700 A CN 109136700A CN 201710459562 A CN201710459562 A CN 201710459562A CN 109136700 A CN109136700 A CN 109136700A
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- weight
- magnesium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
Abstract
The present invention provides high thermal conductivity magnesium alloy, inverter case, inverter and automobile, gross mass based on high thermal conductivity magnesium alloy, the high thermal conductivity magnesium alloy includes: the Al of 6.0-10.0 weight %, the Mn of 0.8-3.0 weight %, the Ce of 2.0~4.0 weight %, Nd greater than 0 and less than 0.5 weight %, the Zn of 0.1~0.5 weight %, the Ca of 0.5~1.0 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.Mechanical property is ideal while the magnesium alloy has very high thermal conductivity, such as can be used to make the inverter case of automobile, greatly expand the application range of magnesium alloy effective for more demanding to heating conduction and require under light conditions and environment.
Description
Technical field
The present invention relates to field of material technology, specifically, it is related to high thermal conductivity magnesium alloy and its application, more particularly to
High thermal conductivity magnesium alloy, the inverter case formed by above-mentioned high thermal conductivity magnesium alloy, inverter including above-mentioned inverter case and
Automobile comprising above-mentioned inverter.
Background technique
Existing conventional diecast magnesium alloy is AZ91D, main component are as follows: Al:8.5~9.5%, Zn:0.45 in the market
~0.90%, Mn:0.17~0.4%, Si :≤0.05%, Cu :≤0.025%, Ni :≤0.001%, Fe :≤0.004%,
Remaining is magnesium.Material flowing forming property is good, and low in cost, mechanical property is higher, but thermal conductivity is less than normal, only < 60W/m.K,
To limit the extensive use of magnesium alloy materials.
Thus, the correlative study of magnesium alloy still has much room for improvement at present.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose die casting magnesium conjunction that is a kind of with good heating conduction, or having ideal mechanical property simultaneously
Gold.
In one aspect of the invention, the present invention provides a kind of high thermal conductivity magnesium alloys.According to an embodiment of the invention, base
In the gross mass of the high thermal conductivity magnesium alloy, the magnesium alloy includes: the Al of 6.0-10.0 weight %, 0.8-3.0 weight %'s
Mn, the Ce of 2.0~4.0 weight %, the Nd greater than 0 and less than 0.5 weight %, the Zn of 0.1~0.5 weight %, 0.5~1.0 weight
The Ca for measuring %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.Inventors have found that containing above-mentioned group
Point magnesium alloy while there is very high thermal conductivity mechanical property it is ideal, can effective for heating conduction require compared with
It is high and require under light conditions and environment, it such as is used to make the inverter case of automobile, greatly expands answering for magnesium alloy
Use range.
In another aspect of this invention, the present invention provides a kind of inverter cases.According to an embodiment of the invention, this is inverse
At least part for becoming device shell is formed by mentioned-above high thermal conductivity magnesium alloy.The inverter case has non-as a result,
Often high thermal conductivity has extraordinary heat dissipation performance, so that using the safety of the inverter of the inverter case, using the longevity
Life is obviously improved.
In still another aspect of the invention, the present invention provides a kind of inverters.According to an embodiment of the invention, the inverter
Including mentioned-above inverter case.Inventors have found that the inverter has good heat dissipation performance, safety in utilization is obvious
It improves, service life significantly extends.
In another aspect of the invention, the present invention provides a kind of automobiles.According to an embodiment of the invention, the automobile includes
Mentioned-above inverter.The automobile has all feature and advantage of mentioned-above inverter, and this is no longer going to repeat them.
Specific embodiment
The embodiment of the present invention is described below in detail.The embodiments described below is exemplary, and is only used for explaining this hair
It is bright, and be not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to text in the art
It offers described technology or conditions or is carried out according to product description.Reagents or instruments used without specified manufacturer,
For can be with conventional products that are commercially available.
In one aspect of the invention, the present invention provides a kind of high thermal conductivity magnesium alloys.According to an embodiment of the invention, base
In the gross mass of the high thermal conductivity magnesium alloy, the magnesium alloy includes: the Al of 6.0-10.0 weight %, 0.8-3.0 weight %'s
Mn, the Ce of 2.0~4.0 weight %, the Nd greater than 0 and less than 0.5 weight %, the Zn of 0.1~0.5 weight %, 0.5~1.0 weight
The Ca for measuring %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.Inventors have found that containing above-mentioned group
Mechanical property is ideal while the magnesium alloy divided has very high thermal conductivity, and has good mouldability, can be effective
In more demanding to heating conduction and require under light conditions and environment, such as the inverter case for making automobile, greatly
The application range of magnesium alloy is extended greatly.
According to an embodiment of the invention, the intensity and corrosion resistance of alloy can be improved in aluminium in above-mentioned magnesium alloy；Manganese
The elongation and toughness of alloy can be improved；The rare earth elements such as addition Ce, Nd are remarkably improved the high-temperature behavior of magnesium alloy, and
The acceptable significant refining alloy particle in casting process, and magnesium can form solid solution, and rich magnesium area with above-mentioned rare earth element
For low melting point Simple eutectic and grain boundaries be in net distribution, inhibit the formation of micropore, thus improve magnesium alloy cast performance and
Heating conduction, wherein Nd is affected to magnesium alloy refined crystalline strengthening, and Ce is conducive to the refining effect of microscopic structure to improve alloy
Mechanical property, corrosion resistance and heating conduction；Zinc can play solution strengthening effect and form hardening constituent；It is added a small amount of
Ca, Sr can prevent alloy from aoxidizing in fusion process.Inventor is mixed according to the above mentioned proportion above-mentioned each component to form magnesium
Alloy, each component act synergistically mutually, obtained magnesium alloy while having excellent heating conduction and mechanical property, can be effective
Applied to multiple fields, especially there is the case where high requirement to heating conduction.
According to an embodiment of the invention, being closed to further increase the service performance of magnesium alloy based on the high thermal conductivity magnesium
The gross mass of gold, the magnesium alloy may include: the Al of 6.0-8.5 weight %, the Nd greater than 0 and less than 0.4 weight %.By
This, can guarantee magnesium alloy have ideal heating conduction while, have good mechanical property, corrosion resistance and at
Type, to better meet the requirement of different operating environment and condition.
A specific embodiment according to the present invention, based on the gross mass of the high thermal conductivity magnesium alloy, the magnesium alloy can
To include: the Al of 8.0 weight %, the Mn of 1.1 weight %, the Ce of 3.2 weight %, the Nd of 0.004 weight %, 0.13 weight %'s
Zn, the Ca of 0.7 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
Another specific embodiment according to the present invention, based on the gross mass of the high thermal conductivity magnesium alloy, the magnesium alloy
It may include: the Al of 6.0 weight %, the Mn of 3.0 weight %, the Ce of 2.0 weight %, the Nd of 0.03 weight %, 0.5 weight %'s
Zn, the Ca of 0.5 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
Another specific embodiment according to the present invention, based on the gross mass of the high thermal conductivity magnesium alloy, the magnesium alloy
It may include: the Al of 8.5 weight %, the Mn of 0.8 weight %, the Ce of 4.0 weight %, the Nd of 0.01 weight %, 0.1 weight %'s
Zn, the Ca of 1.0 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
Inventors have found that the magnesium alloy with above-mentioned formula, while with excellent heating conduction, mechanical property reason
Think, mouldability is excellent.
Inventor has found that the magnesium alloy of embodiment according to the present invention is existing with being significantly better than by lot of experiment validation
The heating conduction of magnesium alloy, the experimental results showed that, the thermal conductivity of the magnesium alloy with mentioned component and proportion can be greater than 90w/
m.k.The magnesium alloy can be efficiently applied to the various environment for having to heating conduction and preferably requiring as a result, and magnesium alloy is same
When have density small, the advantages that specific strength is high, bigger than elasticity modulus, and absorb shock resistance is good, and the corrosive nature of resistance to organic matter and alkali is good.
According to an embodiment of the invention, the experimental results showed that magnesium alloy according to an embodiment of the present invention has excellent material
Fluidity is formed, 1100mm can be greater than.The magnesium alloy has good mouldability as a result, can be formed by die-casting process.
In addition, magnesium alloy according to an embodiment of the present invention can also meet at least one of the following conditions: tensile strength is big
In 180MPa；Yield strength is greater than 150MPa；Elongation percentage is greater than 3.5%.The magnesium alloy is with good thermal conductivity as a result,
While energy, mechanical property is also preferable, can satisfy the requirement of different field, different operating environment and condition.
In another aspect of this invention, the present invention provides a kind of inverter cases.According to an embodiment of the invention, this is inverse
At least part for becoming device shell is formed by mentioned-above high thermal conductivity magnesium alloy.The inverter case has non-as a result,
Often high thermal conductivity has extraordinary heat dissipation performance, so that using the safety of the inverter of the inverter case, using the longevity
Life is obviously improved, and easily processed into type.
According to an embodiment of the invention, the specific structure etc. of the inverter case is not particularly limited, it can be this field
Any of inverter case structure, those skilled in the art can flexible choices according to actual needs.Furthermore, it is possible to inversion
A part of device shell, part such as more demanding to heating conduction are prepared by magnesium alloy of the invention, can also be with inverter shell
Body is all prepared by magnesium alloy of the invention, and this field can also be according to flexible choices such as cost, requirements.
In still another aspect of the invention, the present invention provides a kind of inverters.According to an embodiment of the invention, the inverter
Including mentioned-above inverter case.Inventors have found that the inverter has good heat dissipation performance, safety in utilization is obvious
It improves, service life significantly extends.And it will be understood by those skilled in the art that the inverter has mentioned-above inverter shell
Whole feature and advantage of body, no longer excessively repeat herein.
According to an embodiment of the invention, the inverter further includes conventional inverter in addition to mentioned-above inverter case
Necessary structure and component, such as inverter bridge, control logic and filter circuit for having etc., this is no longer going to repeat them.
In another aspect of the invention, the present invention provides a kind of automobiles.According to an embodiment of the invention, the automobile includes
Mentioned-above inverter.The vehicle inverter has preferable heating conduction and mechanical property as a result, and safety mentions significantly
Height, while inverter case is prepared by magnesium alloy, be conducive to automotive light weight technology, user experience is more preferably.And the automobile has front
All feature and advantage of the inverter, this is no longer going to repeat them.
According to an embodiment of the invention, the automobile has necessity possessed by conventional vehicle other than above-mentioned inverter
Structure and component, such as vehicle body, engine, wheel, interior trim, no longer excessively repeat herein.
Embodiment 1
Magnesium alloy formula: the Al of 8.0 weight %, the Mn of 1.1 weight %, the Ce of 3.2 weight %, the Nd of 0.004 weight %,
The Zn of 0.13 weight %, the Ca of 0.7 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
Preparation step: being put into melting in smelting furnace for pure magnesium ingot and fine aluminium ingot, and 700-750 DEG C of smelting temperature；To smelting furnace
Middle addition Mg-Ca, Mg-Mn, Mg-Zn intermediate alloy, is completely melt it, and 700-750 DEG C of smelting temperature；It is added into smelting furnace
Mg-Ce, Mg-Nd intermediate alloy, 700-750 DEG C of smelting temperature, while coverture bath surface is added；With RJ-5 flux to melt
15 minutes refining treatments are carried out, 730 DEG C -760 DEG C of refining temperature, are then allowed to stand 80-120 minutes, 650 DEG C -730 DEG C of temperature,
In, Sr and Cu can be introduced by the impurity in above-mentioned raw materials, therefore not need to be individually added into.
Embodiment 2
Magnesium alloy formula: the Al of 6.0 weight %, the Mn of 3.0 weight %, the Ce of 2.0 weight %, the Nd of 0.03 weight %,
The Zn of 0.5 weight %, the Ca of 0.5 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
Preparation step: with embodiment 1.
Embodiment 3
Magnesium alloy formula: the Al of 8.5 weight %, the Mn of 0.8 weight %, the Ce of 4.0 weight %, the Nd of 0.01 weight %,
The Zn of 0.1 weight %, the Ca of 1.0 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
Preparation step: with embodiment 1.
Comparative example 1
Magnesium alloy formula: the Al of 11 weight %, the Mn of 0.4 weight %, the Zn of 0.48 weight %, the Ca of 1.2 weight % are small
In the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
Preparation step: with embodiment 1.
Comparative example 2
Magnesium alloy formula: the Al of 8.5 weight %, the Mn of 0.8 weight %, the Ce of 1.0 weight % are greater than 0 and less than 0.5 weight
Nd, the Zn of 0.1 weight %, the Ca of 1.0 weight % for measuring %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and remaining
The magnesium of amount.
Preparation step: with embodiment 1.
Embodiment 4
The magnesium alloy prepared in embodiment 1-3 and comparative example 1-2 is subjected to mechanical property and Determination of conductive coefficients,
In:
(1) Determination of conductive coefficients is tested: according to the test method of ASTM E 1461-07, shining method to diameter using laser
The test of thermal coefficient is carried out for 12.7mm and with a thickness of the magnesium alloy disk of 3mm.
(2) tensile property testing experiment: according to the test method of ISO 6892-1, the magnesium alloy fused mass smelted is used
Compression casting equipment is injected into cavity body of mould, is obtained the stretching casting that wall thickness is 3mm, is drawn using omnipotent mechanics machine
Test is stretched, yield strength and elongation percentage are obtained, wherein yield strength is to generate the yield limit of 0.2% residual deformation, elongation percentage
For fracture elongation.
The experimental result of embodiment 1-3 and comparative example 1-2 are shown in Table 1.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | |
| Tensile strength/MPa | 195 | 190 | 198 | 195 | 198 |
| Yield strength/MPa | 158 | 155 | 158 | 155 | 157 |
| Elongation percentage/% | 4.5 | 4 | 4 | 4 | 4 |
| Thermal coefficient/W/ (mK) | 97 | 95 | 94 | 75 | 77 |
As can be seen from the data in table 1, the mechanical property relative to comparative example 1-2,1-3 of the embodiment of the present invention magnesium alloy obtained
It is almost the same, but thermal coefficient is obviously improved, and illustrates magnesium alloy of the invention in the premise for the mechanical property for guaranteeing to meet the requirements
Under, there is excellent heating conduction.
The magnesium alloy prepared in embodiment 1 and AZ91D magnesium alloy are subjected to Mechanics Performance Testing and material molding stream
Property detection, wherein Mechanics Performance Testing standard is ISO 6892-1, measures the sample of material molding fluidity using mosquito-repellent incense mould, big
Air pressure type casting moulding, 200 DEG C of mould temperature, 700 DEG C of cast temperature, injection speed 3 encloses, and two fast start positions are 140mm, records injection mosquito
Fragrant mould length, to analogy material flowability.As a result it is shown in Table 2 and table 3 respectively.
Table 2
Table 3
By table 2 with the data of table 3 it is found that comparing AZ91D magnesium alloy, high thermal conductivity magnesium alloy of the invention has very high
Thermal conductivity and heat-sinking capability have both higher tensile strength, yield strength and elongation, at the same have extraordinary formability and
Recycling ability.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. a kind of high thermal conductivity magnesium alloy, which is characterized in that the gross mass based on the high thermal conductivity magnesium alloy, the high thermal conductivity magnesium close
Gold includes: the Al of 6.0-10.0 weight %, the Mn of 0.8-3.0 weight %, the Ce of 2.0~4.0 weight %, is greater than 0 and less than 0.5
The Nd of weight %, the Zn of 0.1~0.5 weight %, the Ca of 0.5~1.0 weight %, less than the Sr of 0.1 weight %, less than 0.1 weight
Measure the Cu of % and the magnesium of surplus.
2. high thermal conductivity magnesium alloy according to claim 1, which is characterized in that total matter based on the high thermal conductivity magnesium alloy
Amount, the magnesium alloy includes: the Al of 6.0-8.5 weight %, the Nd greater than 0 and less than 0.4 weight %.
3. high thermal conductivity magnesium alloy according to claim 2, which is characterized in that total matter based on the high thermal conductivity magnesium alloy
Amount, the magnesium alloy includes one of following:
The Al of 8.0 weight %, the Mn of 1.1 weight %, the Ce of 3.2 weight %, the Nd of 0.004 weight %, the Zn of 0.13 weight %,
The Ca of 0.7 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus；
The Al of 6.0 weight %, the Mn of 3.0 weight %, the Ce of 2.0 weight %, the Nd of 0.03 weight %, the Zn of 0.5 weight %,
The Ca of 0.5 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus；
The Al of 8.5 weight %, the Mn of 0.8 weight %, the Ce of 4.0 weight %, the Nd of 0.01 weight %, the Zn of 0.1 weight %,
The Ca of 1.0 weight %, less than the Sr of 0.1 weight %, less than the Cu of 0.1 weight % and the magnesium of surplus.
4. high thermal conductivity magnesium alloy according to any one of claim 1-3, which is characterized in that thermal conductivity is greater than 90w/m.k.
5. high thermal conductivity magnesium alloy according to claim 4, which is characterized in that material forms fluidity and is greater than 1100mm.
6. high thermal conductivity magnesium alloy according to claim 5, which is characterized in that meet at least one of the following conditions:
Tensile strength is greater than 180MPa；
Yield strength is greater than 150MPa；
Elongation percentage is greater than 3.5%.
7. a kind of inverter case, which is characterized in that at least part of the inverter case is by appointing in claim 1-6
What high thermal conductivity magnesium alloy described in one was formed.
8. a kind of inverter, which is characterized in that including inverter case as claimed in claim 7.
9. a kind of automobile, which is characterized in that including inverter according to any one of claims 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710459562.6A CN109136700A (en) | 2017-06-16 | 2017-06-16 | High thermal conductivity magnesium alloy, inverter case, inverter and automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710459562.6A CN109136700A (en) | 2017-06-16 | 2017-06-16 | High thermal conductivity magnesium alloy, inverter case, inverter and automobile |
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