CN102912203A - Grain-refined manganese-lithium alloy and method for manufacturing same - Google Patents
Grain-refined manganese-lithium alloy and method for manufacturing same Download PDFInfo
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- CN102912203A CN102912203A CN2012104264989A CN201210426498A CN102912203A CN 102912203 A CN102912203 A CN 102912203A CN 2012104264989 A CN2012104264989 A CN 2012104264989A CN 201210426498 A CN201210426498 A CN 201210426498A CN 102912203 A CN102912203 A CN 102912203A
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Abstract
The invention discloses grain-refined manganese-lithium alloy and a method for manufacturing the same. The manganese-lithium alloy comprises, by mass, from 11.0% to 15.0% of Li, form 1.0% to 3.0% of Al, from 0.1% to 0.5% of La, lower than or equal to 0.3% of impurities and the balance manganese. The method for manufacturing the grain-refined manganese-lithium alloy includes heating a formula amount of the pure manganese, a formula amount of the pure lithium, a formula amount of the pure aluminum and a formula amount of manganese-lanthanum master alloy under conditions of vacuumizing and feeding of inert gas until the temperature reaches 720 DEG C to obtain alloy; preserving heat at the temperature of 700 DEG C after the alloy is completely melted, and allowing the alloy to stand for 15 minutes; and pouring melted alloy liquid in molds to obtain as-cast manganese-lithium alloy. The grain-refine manganese-lithium alloy contains rare earth La, structures of grains of the grain-refine manganese-lithium alloy are fine and uniform, the strength and the plasticity are improved, and the grain-refine manganese-lithium alloy is excellent in follow-up processing property, low in production cost and suitable for industrial large-scale production.
Description
Technical field
The present invention relates to a kind of magnesium lithium alloy material and preparation method thereof, particularly a kind of grain refining type magnesium lithium alloy and preparation method thereof.
Background technology
Now, important developing direction of high-tech industry is to pursue the lightweight of device and device, and magnesium lithium alloy is to realize one of light-weighted preferred material as the lightest present structural metallic materials.Magnesium lithium alloy also has ability, especially its deformability advantage that very high specific tenacity, specific rigidity and good damping performance and anti-high energy particle penetrate, and makes it become the desirable preferred material in the fields such as weapons, aerospace, automobile, electronics.
LA141(Mg-14Li-1Al) be a kind of typical commercial magnesium lithium alloy, its density is approximately low by 25% than traditional magnesium alloy, also is one of alloy representative in the Mg-Li-Al alloy.In the Mg-Li binary alloy, increase along with Li content, transformation by close-packed hexagonal (HCP) → close-packed hexagonal (HCP)+body-centered cubic (BCC) → body-centered cubic (BCC) will occur in the structure of alloy, the plasticity of alloy is also increasing substantially, but because the chemical property of Mg-Li alloy is active, current main founding mode is die casting, so its as-cast structure is thick, inequality, intensity is lower.And add Al in the Mg-Li alloy, and can make matrix produce solution strengthening and ageing strengthening, thereby the stability of the mechanical property of Mg-Li alloy is improved, along with the increase of Al content, alloy rigidity (intensity) increases.And in the Mg-Li-Al alloy, will inevitably have MgLi
2Al phase, this compound can change a kind of equilibrium phase AlLi or MgLiAl into when under lower temperature overaging occuring
2, this equilibrium phase is unfavorable for the intensity of alloy, just because of the overaging phenomenon of magnesium lithium alloy, so that this alloy is rarely used in high-strength part design, is mainly used in the parts not high to requirement of strength.
In order to improve the intensity of magnesium lithium alloy, enlarge its range of application, can improve the intensity of magnesium lithium alloy by strengthening such as multi-element alloyed, matrix material and the means such as viscous deformation, studies show that the intensity of magnesium lithium alloy can reach 300Mpa.But these method major parts are that to sacrifice unit elongation be that cost is put forward heavy alloyed intensity, and a large advantage of magnesium lithium alloy excellent plasticity just.Rapid solidification-powder metallurgy is crystal grain thinning significantly, puies forward heavy alloyed intensity and plasticity, but cost is too high, and industrialized popularization value is not high.
Summary of the invention
In view of this, the invention provides a kind of grain refining type magnesium lithium alloy and preparation method thereof, the grain structure of this magnesium lithium alloy is tiny evenly, and intensity and plasticity increase, and properties for follow is good, and production cost is low.
The invention discloses a kind of grain refining type magnesium lithium alloy, described magnesium lithium alloy is composed of the following components by mass percentage:
Li 11.0%~15.0%；
Al 1.0%~3.0%；
La 0.1%~0.5%；
Impurity≤0.3%;
The magnesium surplus.
Further, described magnesium lithium alloy is composed of the following components by mass percentage:
Li 14.0%；
Al 1.0%；
La 0.3%；
Impurity≤0.3%;
The magnesium surplus.
The invention also discloses the preparation method of above-mentioned grain refining type magnesium lithium alloy, the pure magnesium of formula ratio, pure lithium, fine aluminium and magnesium lanthanum master alloy are heated to 720 ℃ under the condition that vacuumizes and pass into rare gas element, after alloy melts fully, 700 ℃ of insulations were left standstill 15 minutes, then the aluminium alloy with melting is poured in the mould, obtains the magnesium lithium alloy of as cast condition.
Further, the quality percentage composition of each component is in the described magnesium lanthanum master alloy: La 30%; Magnesium 70%.
Beneficial effect of the present invention is: grain refining type magnesium lithium alloy of the present invention is a kind of magnesium lithium alloy that contains rare earth La, and La joins the effect of playing in the magnesium lithium alloy the following aspects:
1) La and Al generate Al
2La, this compound is distributed in grain boundaries with web form, significantly refinement the as-cast structure of magnesium lithium alloy, it has good crystallography matching relationship mutually with β-Li in the magnesium lithium-aluminium alloy, therefore has the effect of remarkable refinement magnesium lithium alloy tissue in process of setting;
2) Al
2The fusing point of La is high, can stable existence in the follow-up course of processing, therefore can play the effect that second-phase is strengthened;
3) La and the Al that join in the alloy react, and have consumed a certain amount of Al, so that the probability that the Mg-Li-Al ternary phase occurs and quantity all reducing, thereby have reduced the generation of overaging phenomenon.
Therefore, the grain structure of magnesium lithium alloy of the present invention is tiny evenly, and intensity and plasticity increase, and properties for follow is good, and production cost is low, is suitable for industrial scale operation.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is the as-cast structure photo of LA141 magnesium lithium alloy;
Fig. 2 is the as-cast structure photo of embodiment 1 magnesium lithium alloy.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.
Embodiment 1
The grain refining type magnesium lithium alloy of present embodiment is composed of the following components by mass percentage:
Li 14.0%；
Al 1.0%；
La 0.3%；
Impurity≤0.3%;
The magnesium surplus.
The preparation method of the grain refining type magnesium lithium alloy of present embodiment, the pure magnesium of formula ratio, pure lithium, fine aluminium and magnesium lanthanum master alloy are heated to 720 ℃ under the condition that vacuumizes and pass into rare gas element, after alloy melts fully, 700 ℃ of insulations were left standstill 15 minutes, then the aluminium alloy with melting is poured in the mould, obtains the magnesium lithium alloy of as cast condition; The quality percentage composition of each component is in the described magnesium lanthanum master alloy: La 30%; Magnesium 70%.
Fig. 1 is the as-cast structure photo of LA141 magnesium lithium alloy, Fig. 2 is the as-cast structure photo of embodiment 1 magnesium lithium alloy, utilize division lines method that grain-size is measured, the as cast condition average grain size that obtains embodiment 1 magnesium lithium alloy is 300 μ m, significantly is lower than the as cast condition average grain size 500 μ m with LA141 magnesium lithium alloy under the state.
Grain refining type magnesium lithium alloy of the present invention is a kind of magnesium lithium alloy that contains rare earth La, and La joins the effect of playing in the magnesium lithium alloy the following aspects:
1) La and Al generate Al
2La, this compound is distributed in grain boundaries with web form, significantly refinement the as-cast structure of magnesium lithium alloy, it has good crystallography matching relationship mutually with β-Li in the magnesium lithium-aluminium alloy, therefore has the effect of remarkable refinement magnesium lithium alloy tissue in process of setting;
2) Al
2The fusing point of La is high, can stable existence in the follow-up course of processing, therefore can play the effect that second-phase is strengthened;
3) La and the Al that join in the alloy react, and have consumed a certain amount of Al, so that the probability that the Mg-Li-Al ternary phase occurs and quantity all reducing, thereby have reduced the generation of overaging phenomenon.
Therefore, the grain structure of magnesium lithium alloy of the present invention is tiny evenly, and intensity and plasticity increase, and properties for follow is good, and production cost is low, is suitable for industrial scale operation.
In the grain refining type magnesium lithium alloy of the present invention, the content of Li element can be 11.0% ~ 15.0% by mass percentage, the content of Al element can be 0.1% ~ 0.5% by mass percentage for the content of 1.0% ~ 3.0%, La element by mass percentage, all can realize purpose of the present invention.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although by invention has been described with reference to the preferred embodiments of the present invention, but those of ordinary skill in the art is to be understood that, can make various changes to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (4)
1. grain refining type magnesium lithium alloy, it is characterized in that: described magnesium lithium alloy is composed of the following components by mass percentage:
Li 11.0%~15.0%；
Al 1.0%~3.0%；
La 0.1%~0.5%；
Impurity≤0.3%;
The magnesium surplus.
2. grain refining type magnesium lithium alloy according to claim 1, it is characterized in that: described magnesium lithium alloy is composed of the following components by mass percentage:
Li 14.0%；
Al 1.0%；
La 0.3%；
Impurity≤0.3%;
The magnesium surplus.
3. the preparation method of claim 1 or 2 described grain refining type magnesium lithium alloys, it is characterized in that: the pure magnesium of formula ratio, pure lithium, fine aluminium and magnesium lanthanum master alloy are heated to 720 ℃ under the condition that vacuumizes and pass into rare gas element, after alloy melts fully, 700 ℃ of insulations were left standstill 15 minutes, then the aluminium alloy with melting is poured in the mould, obtains the magnesium lithium alloy of as cast condition.
4. the preparation method of grain refining type magnesium lithium alloy according to claim 3, it is characterized in that: the quality percentage composition of each component is in the described magnesium lanthanum master alloy: La 30%; Magnesium 70%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469124A (en) * | 2013-09-12 | 2013-12-25 | 哈尔滨工程大学 | In-situ synthesized Al4La crystal whisker reinforced magnesium matrix composite material and preparation method |
| CN105838950A (en) * | 2014-12-02 | 2016-08-10 | 安立材料科技股份有限公司 | Magnesium alloy |
| CN113667871A (en) * | 2021-08-10 | 2021-11-19 | 郑州轻研合金科技有限公司 | High-ductility soluble magnesium-lithium alloy and preparation method and application thereof |
| EP4333091A3 (en) * | 2022-08-31 | 2024-03-20 | LG Energy Solution, Ltd. | Negative electrode including lithium-lanthanum alloy and lithium ion secondary battery including the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713034A (en) * | 2009-12-11 | 2010-05-26 | 重庆大学 | Method for refining LA141 magnesium-lithium alloy grains |
-
2012
- 2012-10-31 CN CN2012104264989A patent/CN102912203A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713034A (en) * | 2009-12-11 | 2010-05-26 | 重庆大学 | Method for refining LA141 magnesium-lithium alloy grains |
Non-Patent Citations (1)
| Title |
|---|
| 刘滨等: "富镧混合稀土对 Mg-10Li-4Al合金组织和力学性能的影响", 《航空材料学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469124A (en) * | 2013-09-12 | 2013-12-25 | 哈尔滨工程大学 | In-situ synthesized Al4La crystal whisker reinforced magnesium matrix composite material and preparation method |
| CN105838950A (en) * | 2014-12-02 | 2016-08-10 | 安立材料科技股份有限公司 | Magnesium alloy |
| CN113667871A (en) * | 2021-08-10 | 2021-11-19 | 郑州轻研合金科技有限公司 | High-ductility soluble magnesium-lithium alloy and preparation method and application thereof |
| EP4333091A3 (en) * | 2022-08-31 | 2024-03-20 | LG Energy Solution, Ltd. | Negative electrode including lithium-lanthanum alloy and lithium ion secondary battery including the same |
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Application publication date: 20130206 |