CN107475589A - Rare earth and magnesium-based alloys of Mg La Zr and preparation method thereof - Google Patents
Rare earth and magnesium-based alloys of Mg La Zr and preparation method thereof Download PDFInfo
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- CN107475589A CN107475589A CN201710669789.3A CN201710669789A CN107475589A CN 107475589 A CN107475589 A CN 107475589A CN 201710669789 A CN201710669789 A CN 201710669789A CN 107475589 A CN107475589 A CN 107475589A
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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
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
Abstract
The invention discloses rare earth and magnesium-based alloys of a kind of Mg La Zr and preparation method thereof, it is 99.95wt.% Zr blocks that alloy, which is prepared using purity as 99.9wt.% La blocks, purity, purity for 99.99wt.% Mg blocks and purity for 99.9wt.% micro Hf blocks is raw material.Mg La Zr alloy-steel castings compositions are that La contents are 1.1~4.22wt.% by weight percentage；Zr contents are 0.45~0.50wt.%；Hf contents are 0.05~0.1wt.%, and surplus is Mg and inevitable impurity.Using the medium frequency induction melting furnace melting Mg La Zr alloys with atmosphere protection.Mg La Zr alloys prepared by the present invention thermal conductivity factor at 25 DEG C is more than 110W/ (mK), and tensile strength is more than 180MPa, and elongation percentage has good heat dispersion and mechanical property up to 25%.
Description
Technical field
The present invention relates to a kind of magnesium alloy materials and preparation method thereof, more particularly to a kind of rare earth and magnesium-based alloy and its system
Preparation Method, applied to technical field of non-ferrous metallurgy.
Background technology
As the rapid development of science and technology, the consumption of metal material are growing day by day.Magnesium alloy is as emerging light gold
Belong to structural material, there is specific strength and specific stiffness height, density is low, effectiveness is good, good stability of the dimension, machinability
The advantages that excellent, have attracted increasing attention and study.Recently as magnesium alloy in automobile making, Aero-Space, electronics
The application in the fields such as communication, biomedicine is more and more extensive, and higher and higher requirement is it is also proposed to the performance of magnesium alloy.
In engineer applied, often there is higher requirement to the heat conductivility of material, especially radiating element is to material requirements
It is higher, to improve the life-span of product and job stability.Pure magnesium has good heat conductivility, and its room temperature thermal conductivity is 156W/
(mK) copper and aluminium, are only second in common commercial metal material, but because the density of magnesium is 1.78g/cm3, only aluminium
2/3rd, the 1/4 of iron so that magnesium has the thermal conductivity of considerable specific heat conductance, i.e. unit mass, and its specific heat conductance is suitable with aluminium.Base
In above advantage, exploitation lightweight magnesium alloy requires that high material can reach loss of weight as radiator etc. to heat conduction, heat dispersion
Effect, have a good application prospect.Alloying is favorably improved the mechanical performance and corrosion resistance of magnesium alloy, in magnesium alloy
Alloying element mainly has following a few classes：Rare earth element is including La, Sm, Nd, Gd, Ce etc.；Alkaline earth element is including Sr, Ca, Ba etc.；And
Other alloying elements are including Al, Zn, Mn, Si, Ag, Zr etc..Rare-earth elements La can not only produce precipitation strength in the magnesium alloy
Effect, can also be formed intermetallic compound produce intercrystalline strengthening effect, so as to significantly improve the high-temperature mechanics of magnesium alloy
Performance.At present, in the research for the magnesium alloy that radiates, the Chinese patent literature of patent No. Application No. 200710121457.8 is public
A kind of heat conductive magnesium alloy and its preparation method are opened, the component content of the magnesium alloy is：Zn content is 2.5~11wt.%；Zr
Content be 0.15~1.5wt.%；Ag content is 0~2.5wt.%；Ce content is 0.3~3.5wt.%；Nd content
For 0~1.5wt.%；La content is 0~2.5wt.%；Pr content is 0~0.5wt.%；Wherein Nd, La, Pr are simultaneously
Zero or it is not zero simultaneously, remaining is Mg.For above-mentioned magnesium alloy at 20 DEG C, its thermal conductivity is about 125W/ (mK)；Tensile strength is about
350Mpa.But because your rare earth element price is high, so as to limit the application of radiating magnesium alloy.
The content of the invention
In order to solve prior art problem, it is an object of the present invention to overcome the deficiencies of the prior art, and to provide one kind
Rare earth and magnesium-based alloys of Mg-La-Zr and preparation method thereof, preparation radiating magnesium alloy method process is simple, and cost is low, Mg- of the present invention
The rare earth and magnesium-based alloys of La-Zr have superior heat radiation performance and mechanical property concurrently, casting magnesium alloy material thermal conductivity factor at 25 DEG C
More than 110W/ (mK), tensile strength is more than 180MPa, and elongation percentage can reach 25%, disclosure satisfy that the parts pair such as communication, automobile
The high request of heat sink material, expand the application field of magnesium alloy.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
A kind of rare earth and magnesium-based alloys of Mg-La-Zr, the mass percentage content of its alloying component are：La contents be 1.1~
4.22wt.%；Zr content is 0.45~0.5wt.%；Hf contents are 0.05~0.1wt.%, and surplus is for Mg and unavoidably
Impurity.Magnesium-rare earth prepared by the present invention has superior heat radiation performance and mechanical property concurrently.
As currently preferred technical scheme, La contents are 2.00~4.22wt.%；Zr content be 0.48~
0.5wt.%；Hf contents are 0.08~0.1wt.%.
A kind of preparation method of the rare earth and magnesium-based alloys of Mg-La-Zr of the present invention, comprises the following steps：
A. raw material prepares：
The weight percent proportioning of the Mg-La-Zr alloys according to target prepared, which calculates, weighs each raw material, is prepared for target
Mg-La-Zr alloys, wherein La contents are 1.1~4.22wt.%, and Zr content is 0.45~0.5wt.%, and Hf contents are 0.05
~0.1wt.%, surplus are Mg and inevitable impurity；The La blocks for being 99.9wt.% by purity, purity 99.95wt.%
Zr blocks, purity be 99.99wt.% Mg blocks and purity be 99.9wt.% micro Hf blocks as alloy raw material, it is standby；
B. alloy smelting process：
The Mg blocks weighed in the step a are put into the crucible of medium frequency induction melting furnace, are warming up at least 350 DEG C
When, open SF6And N2Mixed gas protected gas, then after being warming up to not higher than 650 DEG C, add in the step a La weighed
Block, Zr blocks and Hf blocks, alloy melt will be obtained after each melting sources, it is uniform to alloy Melt Stirring, make all alloying elements equal
It is even to be distributed in alloy molten solution；When carrying out alloy melting, using SF6Gas is as protection gas；
C. the solidification of alloy：
The alloy molten solution prepared in the step b is cast in mould, obtains alloy-steel casting.
The present invention compared with prior art, has following obvious prominent substantive distinguishing features and remarkable advantage：
1. the preparation method cost of alloy of the present invention is low, process simple and stable can reduce the shrinkage cavity and partially of Mg alloy castings
Analysis；
2. the inventive method is prepared for a kind of magnesium-rare earth for having excellent heat dispersion and excellent mechanical performances, due to
Rare earth element and other alloying elements added with specific components, the effect of its refined crystalline strengthening is obvious, and not only heat dispersion is better than biography
System magnesium alloy, and Mechanics of Machinery intensity is also improved, and is adapted to wide popularization and application；
3. Mg-La-Zr alloys prepared by the present invention thermal conductivity factor at 25 DEG C is more than 110W/ (mK), tensile strength is big
In 180MPa, elongation percentage can reach 25%, have good heat dispersion and mechanical property.
Brief description of the drawings
Fig. 1 is the Mg-1.1La-0.45Zr alloy microscopic structure SEM photographs of the embodiment of the present invention one.
Fig. 2 is the Mg-4.22La-0.5Zr alloy microscopic structure SEM photographs of the embodiment of the present invention two.
Embodiment
Such scheme is described further below in conjunction with specific examples of the implementation, the preferred embodiments of the present invention are described in detail such as
Under：
Embodiment one：
In the present embodiment, the rare earth and magnesium-based alloys of a kind of Mg-La-Zr, the mass percentage content of its alloying component are：La
Content is 1.1wt.%；Zr content is 0.45wt.%；Hf contents are 0.05wt.%, and surplus is Mg and inevitably miscellaneous
Matter.The present embodiment Mg-1.1La-0.45Zr magnesium-rare earths have superior heat radiation performance and mechanical property concurrently.A kind of Mg- of the present invention
The preparation method of the rare earth and magnesium-based alloys of La-Zr, comprises the following steps：
A. raw material prepares：
The weight percent proportioning of the Mg-La-Zr alloys according to target prepared, which calculates, weighs each raw material, is prepared for target
Mg-La-Zr alloys, wherein La contents are 1.1wt.%, and Zr content is 0.45wt.%, and Hf contents are 0.05wt.%, surplus
For Mg and inevitable impurity；It is by Zr blocks that La blocks that purity is 99.9wt.%, purity are 99.95wt.%, purity
99.99wt.% Mg blocks and purity be 99.9wt.% micro Hf blocks as alloy raw material, it is standby；
B. alloy smelting process：
The Mg blocks weighed in the step a are put into the crucible of medium frequency induction melting furnace, when being warming up to 350 DEG C, opened
Open SF6And N2Mixed gas protected gas, using SF6Gas is as protection gas, then after being warming up to 650 DEG C, adds in the step
La blocks, Zr blocks and the Hf blocks weighed in a, alloy melt will be obtained after each melting sources, it is uniform to alloy Melt Stirring, make to own
Alloying element is evenly distributed in alloy molten solution；
C. the solidification of alloy：
The alloy molten solution prepared in the step b is cast in mould, obtains the casting of Mg-1.1La-0.45Zr alloys
Part.
Mechanical property and thermophysics performance test are carried out to Mg-1.1La-0.45Zr alloy-steel castings manufactured in the present embodiment
Test analysis, the performance parameter of acquisition are as shown in table 1 below：
The embodiment one of table 1. prepares Properties of Magnesium Alloy and pure magnesium performance comparison
Shown in table 1, Mg-1.1La-0.45Zr alloys and the physical function parameter of pure magnesium prepared by comparative example one
Understand, the intensity and plasticity of Mg-1.1La-0.45Zr alloys prepared by embodiment one are superior to pure magnesium alloy, and thermal conductivity factor also connects
Nearly pure magnesium, there is superior heat radiation performance and mechanical property, comprehensive physical excellent performance, it is relatively low to prepare cost.Fig. 1 is embodiment one
Mg-1.1La-0.45Zr alloy microscopic structure SEM photographs, Mg-1.1La-0.45Zr alloys primary phase are Mg, form LaMg12With
Mg eutectic structure.Rare-earth elements La can not only produce the effect of precipitation strength in the magnesium alloy, also form intermetallic
Thing produces intercrystalline strengthening effect.Zr can play refined crystalline strengthening effect so as to significantly improve the high-temperature mechanics of magnesium alloy
Energy.Adding La and Zr simultaneously makes the effect of refined crystalline strengthening more notable.Addition element of the Hf as manufacture mg-based material, has and carries
High ductibility, inoxidizability and high-temperature stability.The technological process of embodiment one is simple, and stable, cost is low, is prepared for having well
The magnesium-rare earth of heat dispersion and mechanical property.
Embodiment two：
The present embodiment and embodiment one are essentially identical, are particular in that：
In the present embodiment, the rare earth and magnesium-based alloys of a kind of Mg-La-Zr, the mass percentage content of its alloying component are：La
Content is 4.22wt.%；Zr content is 0.5wt.%；Hf contents are 0.1wt.%, and surplus is Mg and inevitable impurity.
The present embodiment Mg-4.22La-0.5Zr magnesium-rare earths have superior heat radiation performance and mechanical property concurrently.
A kind of preparation method of the rare earth and magnesium-based alloys of Mg-La-Zr of the present invention, comprises the following steps：
A. raw material prepares：
The weight percent proportioning of the Mg-La-Zr alloys according to target prepared, which calculates, weighs each raw material, is prepared for target
Mg-La-Zr alloys, wherein La contents are 4.22wt.%；Zr content is 0.5wt.%；Hf contents are 0.1wt.%, and surplus is
Mg and inevitable impurity；It is by Zr blocks that La blocks that purity is 99.9wt.%, purity are 99.95wt.%, purity
99.99wt.% Mg blocks and purity be 99.9wt.% micro Hf blocks as alloy raw material, it is standby；
B. alloy smelting process：
The Mg blocks weighed in the step a are put into the crucible of medium frequency induction melting furnace, when being warming up to 350 DEG C, opened
Open SF6And N2Mixed gas protected gas, using SF6Gas is as protection gas, then after being warming up to 650 DEG C, adds in the step
La blocks, Zr blocks and the Hf blocks weighed in a, alloy melt will be obtained after each melting sources, it is uniform to alloy Melt Stirring, make to own
Alloying element is evenly distributed in alloy molten solution；
C. the solidification of alloy：
The alloy molten solution prepared in the step b is cast in mould, obtains the casting of Mg-4.22La-0.5Zr alloys
Part.
Mechanical property and thermophysics performance test are carried out to Mg-4.22La-0.5Zr alloy-steel castings manufactured in the present embodiment
Test analysis, the performance parameter of acquisition are as shown in table 2 below：
The embodiment two of table 2. prepares Properties of Magnesium Alloy and pure magnesium performance comparison
Shown in table 2, Mg-4.22La-0.5Zr alloys and the physical function parameter of pure magnesium prepared by comparative example two
Understand, the intensity and plasticity of Mg-4.22La-0.5Zr alloys prepared by embodiment two are superior to pure magnesium alloy, and thermal conductivity factor also connects
Nearly pure magnesium, there is superior heat radiation performance and mechanical property, comprehensive physical excellent performance, it is relatively low to prepare cost.Fig. 2 is embodiment two
Mg-4.22La-0.5Zr alloy microscopic structure SEM photographs, Mg-4.22La-0.5Zr alloys primary phase are Mg, form LaMg12With
Mg eutectic structure.Rare-earth elements La can not only produce the effect of precipitation strength in the magnesium alloy, also form intermetallic
Thing produces intercrystalline strengthening effect.Zr can play refined crystalline strengthening effect so as to significantly improve the high-temperature mechanics of magnesium alloy
Energy.Adding La and Zr simultaneously makes the effect of refined crystalline strengthening more notable.Addition element of the Hf as manufacture mg-based material, has and carries
High ductibility, inoxidizability and high-temperature stability.The technological process of embodiment two is simple, and stable, cost is low, is prepared for having well
The magnesium-rare earth of heat dispersion and mechanical property.
Embodiment three：
The present embodiment is substantially the same as in the previous example, and is particular in that：
In the present embodiment, the rare earth and magnesium-based alloys of a kind of Mg-La-Zr, the mass percentage content of its alloying component are：La
Content is 2.00wt.%；Zr content is 0.48wt.%；Hf contents are 0.08wt.%, and surplus is Mg and inevitably miscellaneous
Matter.The present embodiment Mg-2La-0.48Zr magnesium-rare earths have superior heat radiation performance and mechanical property concurrently.
A kind of preparation method of the rare earth and magnesium-based alloys of Mg-La-Zr of the present invention, comprises the following steps：
A. raw material prepares：
The weight percent proportioning of the Mg-La-Zr alloys according to target prepared, which calculates, weighs each raw material, is prepared for target
Mg-La-Zr alloys, wherein La contents are 2.00wt.%；Zr content is 0.48wt.%；Hf contents are 0.08wt.%, surplus
For Mg and inevitable impurity；It is by Zr blocks that La blocks that purity is 99.9wt.%, purity are 99.95wt.%, purity
99.99wt.% Mg blocks and purity be 99.9wt.% micro Hf blocks as alloy raw material, it is standby；
B. alloy smelting process：
The Mg blocks weighed in the step a are put into the crucible of medium frequency induction melting furnace, when being warming up to 350 DEG C, opened
Open SF6And N2Mixed gas protected gas, using SF6Gas is as protection gas, then after being warming up to 650 DEG C, adds in the step
La blocks, Zr blocks and the Hf blocks weighed in a, alloy melt will be obtained after each melting sources, it is uniform to alloy Melt Stirring, make to own
Alloying element is evenly distributed in alloy molten solution；
C. the solidification of alloy：
The alloy molten solution prepared in the step b is cast in mould, obtains the casting of Mg-4.22La-0.5Zr alloys
Part.
Mechanical property is carried out to Mg-2La-0.48Zr alloy-steel castings manufactured in the present embodiment and thermophysics performance test is surveyed
Examination analysis, the performance parameter of acquisition are as shown in table 3 below：
The embodiment three of table 3. prepares Properties of Magnesium Alloy and pure magnesium performance comparison
Shown in table 3, Mg-2La-0.48Zr alloys and the physical function parameter of pure magnesium prepared by comparative example three can
Know, the intensity and plasticity of Mg-2La-0.48Zr alloys prepared by embodiment two are superior to pure magnesium alloy, and thermal conductivity factor is also close to pure
Magnesium, there is superior heat radiation performance and mechanical property, comprehensive physical excellent performance, it is relatively low to prepare cost.Mg-2La-0.48Zr alloys
Primary phase is Mg, forms LaMg12With Mg eutectic structure.Rare-earth elements La can not only produce precipitation strength in the magnesium alloy
Effect, also form intermetallic compound and produce intercrystalline strengthening effect.Zr can play refined crystalline strengthening effect so as to significantly change
The mechanical behavior under high temperature of kind magnesium alloy.Adding La and Zr simultaneously makes the effect of refined crystalline strengthening more notable.Hf is as manufacture magnesium-based
The addition element of material, have and improve ductility, inoxidizability and high-temperature stability.The technological process of embodiment three is simple, stable,
Cost is low, is prepared for having excellent heat dispersion performance and the magnesium-rare earth of mechanical property.
The embodiment of the present invention is illustrated above in conjunction with accompanying drawing, but the invention is not restricted to above-described embodiment, can be with
A variety of changes are made according to the purpose of the innovation and creation of the present invention, under all Spirit Essence and principle according to technical solution of the present invention
Change, modification, replacement, combination or the simplification made, should be equivalent substitute mode, as long as meeting the goal of the invention of the present invention,
Technical principle and inventive concept without departing from the rare earth and magnesium-based alloys of Mg-La-Zr of the present invention and preparation method thereof, belong to this
The protection domain of invention.
Claims (3)
1. a kind of rare earth and magnesium-based alloys of Mg-La-Zr, it is characterised in that the mass percentage content of its alloying component is：La contents
For 1.1~4.22wt.%；Zr content is 0.45~0.5wt.%；Hf contents are 0.05~0.1wt.%, and surplus is for Mg and not
Evitable impurity.
2. the rare earth and magnesium-based alloys of Mg-La-Zr according to claim 1, it is characterised in that：La contents be 2.00~
4.22wt.%；Zr content is 0.48~0.5wt.%；Hf contents are 0.08~0.1wt.%.
3. the preparation method of the rare earth and magnesium-based alloys of Mg-La-Zr described in a kind of claim 1, it is characterised in that including following step
Suddenly：
A. raw material prepares：
The weight percent proportioning of the Mg-La-Zr alloys according to target prepared, which calculates, weighs each raw material, the Mg-La- prepared for target
Zr alloys, wherein La contents are 1.1~4.22wt.%, and Zr content is 0.45~0.5wt.%, Hf contents are 0.05~
0.1wt.%, surplus are Mg and inevitable impurity；It is 99.95wt.%'s by La blocks that purity is 99.9wt.%, purity
The micro Hf blocks that the Mg blocks and purity that Zr blocks, purity are 99.99wt.% are 99.9wt.% are standby as alloy raw material；
B. alloy smelting process：
The Mg blocks weighed in the step a are put into the crucible of medium frequency induction melting furnace, when being warming up at least 350 DEG C, adopted
Use SF6Gas is as protection gas, then after being warming up to not higher than 650 DEG C, add in the step a La blocks weighed, Zr blocks and
Hf blocks, alloy melt will be obtained after each melting sources, it is uniform to alloy Melt Stirring, all alloying elements is evenly distributed on conjunction
In golden liquation；
C. the solidification of alloy：
The alloy molten solution prepared in the step b is cast in mould, obtains alloy-steel casting.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111250696A (en) * | 2020-04-05 | 2020-06-09 | 重庆大学 | Method for preparing magnesium rare earth alloy spectrum standard sample |
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| US6193817B1 (en) * | 1995-02-06 | 2001-02-27 | Luxfer Group Limited | Magnesium alloys |
| CN101857936A (en) * | 2010-07-05 | 2010-10-13 | 重庆大学 | Method for preparing magnesium alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111250696A (en) * | 2020-04-05 | 2020-06-09 | 重庆大学 | Method for preparing magnesium rare earth alloy spectrum standard sample |
| CN111250696B (en) * | 2020-04-05 | 2021-04-16 | 重庆大学 | Method for preparing magnesium rare earth alloy spectrum standard sample |
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