CN103031474A - Magnesium lithium alloy - Google Patents
Magnesium lithium alloy Download PDFInfo
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- CN103031474A CN103031474A CN2011102919996A CN201110291999A CN103031474A CN 103031474 A CN103031474 A CN 103031474A CN 2011102919996 A CN2011102919996 A CN 2011102919996A CN 201110291999 A CN201110291999 A CN 201110291999A CN 103031474 A CN103031474 A CN 103031474A
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Abstract
The invention discloses a magnesium lithium alloy, which comprises the following ingredients by content: 8-12wt% of Li, 6-8wt% of Al, 1-3wt% of Zn, 0.01-0.2wt% of Ca, 0.01-0.2wt% of Mn, 1-2wt% of Sc and the balance of Mg; wherein the impurity element Cu is less than 0.01wt%, Fe is less than 0.005wt% and Ni is less than 0.005wt%. On the basis of addition of Al and Zn, Ca, Mn and Sc-containing RE are added, the Al is a main intensify element of the alloy, Zn is the intensify element of the alloy, the plasticity of the alloy is simultaneously changed, the non continuous deposition of a strengthening phase Mg17Al12 can be inhibited, thereby slipping of a crystal boundary is inhibited, and the alloy strength is enhanced.
Description
Technical field
The invention belongs to the magnesium alloy technical field, relate in particular to a kind of magnesium lithium alloy.
Background technology
Magnesium lithium alloy is a kind of novel alloy, its light such as plastics and heavily fortified point such as metal, deformable (forging property) is better than other magnesium alloy, and magnesium lithium alloy has good damping performance and anti-high energy particle penetrativity, therefore has very vast potential for future development in fields such as communication electronic industry, military project and space industries.
At present, the intensity of magnesium lithium alloy is lower, and aging stability and corrosion-resistant, has restricted the development of magnesium lithium alloy; And for these defectives, usually adopt alloying to improve alloy property.The most frequently used enhancing element is the strengthening elements such as Al, Zn and rare earth, although Al is preferably element of strengthening effect, and along with the increase of Al amount, the Mg that Al and Mg reaction produce
17Al
12Phase amount increases; Thereby the plasticity of meeting decrease alloy, although along with the increase of Al amount can produce the ageing strengthening characteristic, but more easily produce the overaging phenomenon, and along with the increase of Al amount, the overaging time of occurrence in advance, because the degradation that overaging produces increases relatively, thereby cause intensity difference, the poor rigidity of magnesium lithium alloy material.
Summary of the invention
Technical problem to be solved by this invention is: the magnesium lithium alloy strength of materials is poor, poor rigidity, and the magnesium lithium alloy of a kind of high strength, high rigidity is provided.
A kind of high-strength magnesium-lithium alloy, it comprises following component and content: the Li of 8-12 wt %, the Al of 6-8 wt %, the Zn of 1-3 wt %, the Ca of 0.01-0.2 wt %, the Mn of 0.01-0.2 wt %, the Sc of 1-2 wt %, surplus is Mg; Impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Second purpose of the present invention provides the preparation method of above-mentioned magnesium lithium alloy.
A kind of preparation method of magnesium lithium alloy; Comprise the steps:
(1) takes by weighing: proportionally take by weighing magnesium source, lithium source, aluminium source, zinc source, calcium source, manganese source, scandium source;
(2) melting: with the alloy raw material of step (1), drop in the vacuum induction furnace, be filled with protection gas to 1atm, 800-810 ℃ of lower melting after induction furnace is evacuated to vacuum;
(3) casting: aluminium alloy cast under the protection of the environment of protection gas of step (2) is obtained as-cast magnesium alloy;
(4) thermal treatment: described as-cast magnesium alloy is carried out homogenizing thermal treatment at the 300-350 ℃ of lower 21 ~ 27h that keeps, then under 200-300 ℃ of condition, push or rolling.
The magnesium lithium alloy of Mg-Li-Al-Zn system provided by the invention, not only intensity is high, and rigidity is high, and good stability, good corrosion resistance.
Specific embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Magnesium lithium alloy of the present invention, it consists of by weight percentage:: the Li of 8-12 wt %, the Al of 6-8 wt %, the Zn of 1-3 wt %, the Ca of 0.01-0.2 wt %, the Mn of 0.01-0.2 wt %, the Sc of 1-2 wt %, surplus is Mg; Impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Its component of the magnesium lithium alloy that is more preferably and content are: the Li of 8-10 wt %, and the Al of 6-8 wt %, the Zn of 1-3 wt %, the Ca of 0.1-0.2 wt %, the Mn of 0.1-0.2 wt %, the Sc of 1-2 wt %, surplus is Mg; Impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Also contain the second rare earth element in the magnesium lithium alloy provided by the invention, the present invention does not do particular requirement to the kind of the second rare earth; Preferably, the second rare earth element can be in yttrium, lanthanum, cerium, praseodymium, neodymium and the promethium one or more.
Preferably, take the total mass of Sc and the second rare earth element as benchmark, the content of the second rare earth element is 4 ~ 6 wt %; More preferably, the content of the second rare earth element is 5 wt %.
Magnesium lithium alloy provided by the invention, preferably, its tensile strength is σ b=200-300MPa, and yield strength is σ s=150-260MPa, and unit elongation is δ=17-65%, and density is 1.31-1.60g/cm3.
The inventor is unexpected to be found, in the process of preparation magnesium lithium alloy, Ca and the Mn element of trace can form metallic compound Mg with Mg and Al
2Ca and Al
2Ca can suppress strengthening phase Mg
17Al
12Discontinuous precipitation, promote strengthening phase Mg
17Al
12Continuous precipitation proceed, thereby hinder Grain Boundary Sliding, put forward heavy alloyed intensity; Can alleviate simultaneously the oxidation in metal melt and the heat treating castings process.And Sc can form disperse phase Al with Al and Mg
3Sc and MgSc suppress Grain Boundary Sliding by dispersion-strengthened, thereby put forward heavy alloyed intensity.
Second purpose of the present invention provides the preparation method of above-mentioned magnesium lithium alloy.
A kind of preparation method of magnesium lithium alloy: comprise the steps:
(1) takes by weighing: proportionally take by weighing magnesium source, lithium source, aluminium source, zinc source, calcium source, manganese source, scandium source;
(2) melting: with the alloy raw material of step (1), drop in the vacuum induction furnace, be filled with protection gas to 1atm, 800-810 ℃ of lower melting after induction furnace is evacuated to vacuum;
(3) casting: aluminium alloy cast under the protection of the environment of protection gas of step (2) is obtained as-cast magnesium alloy;
(4) thermal treatment: described as-cast magnesium alloy is carried out homogenizing thermal treatment at the 300-350 ℃ of lower 21 ~ 27h that keeps, then under 200-300 ℃ of condition, push or rolling.
The preparation method of magnesium lithium alloy provided by the invention, wherein each element source all is melting under the vacuum environment that is full of protection gas; Preferably, protection gas is argon gas.
The present invention does not do particular requirement to various element source, as long as the pure metal simple substance of required element can be provided or contain its alloy.Each element source of the present invention is preferably: the magnesium source is the technical pure magnesium ingot; The lithium source is lithium alloy; The aluminium source is the technical pure aluminium ingot; The zinc source is the technical pure zinc ingot metal; The calcium source is calcium alloy; The manganese source is manganese alloy; The scandium source is scandium alloy.
Preferred each element source is: the lithium source is magnesium lithium master alloy; The calcium source is magnesium calcium master alloy; The manganese source is aluminium manganese master alloy.
The invention will be further elaborated below in conjunction with specific embodiment.
Embodiment 1:
The moiety of magnesium lithium alloy and mass percent thereof: Li is 12 wt %, and Al is 6 wt %, and Zn is 1 wt %, and calcium is 0.01 wt %, and Mn is 0.01 wt %, and Sc is 1wt %, and surplus is Mg; Impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
The preparation method of magnesium lithium alloy, following steps:
(1) takes by weighing: take by weighing respectively technical pure magnesium ingot, magnesium lithium master alloy, technical pure aluminium ingot, technical pure zinc ingot metal, magnesium calcium master alloy, aluminium manganese master alloy, scandium alloy according to aforementioned proportion;
(2) melting: behind the alloy raw material surface decontamination with step (1), drop in the vacuum induction furnace, be filled with argon gas to 1atm after induction furnace is evacuated to vacuum, and 805 ℃ of lower meltings;
(3) casting: the aluminium alloy of step (2) is poured in the copper mould that scribbles acetylene under the protection of the environment of argon gas, obtains as-cast magnesium alloy;
(4) thermal treatment: described as-cast magnesium alloy is carried out homogenizing thermal treatment at 325 ℃ of lower 24h that keep, then under the condition of 250 ℃ of constant temperature, push or rolling; Thereby obtain deformation states magnesium lithium alloy H1.
Embodiment 2:
Other experiment condition is with embodiment 1, as different from Example 1: the moiety of magnesium lithium alloy and mass percent thereof: Li is 8 wt %, and Al is 7 wt %, and Zn is 3 wt %, and Ca is 0.2 wt %, and Mn is 0.2 wt %, and Sc is 2 wt %, and surplus is Mg; Control impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Obtain magnesium lithium alloy H2.
Embodiment 3:
Other experiment condition is with embodiment 1, as different from Example 1: the moiety of magnesium lithium alloy and mass percent thereof: Li is 10 wt %, and Al is 8 wt %, and Zn is 2 wt %, and calcium is 0.1 wt %, and Mn is 0.2 wt %, and Sc is 1wt %, and surplus is Mg; Control impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Obtain magnesium lithium alloy H3.
Embodiment 4:
Other experiment condition is with embodiment 1, as different from Example 1: the moiety of magnesium lithium alloy and mass percent thereof: Li is 10 wt%, and Al is 6 wt %, and Zn is 2 wt %, and Ca is 0.2wt %, and Mn is 0.01wt %, and Sc is 1 wt %, and surplus is Mg; Impurity element Cu＜0.01wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Obtain magnesium lithium alloy H4.
Comparative Examples 1:
Other experiment condition is with embodiment 1, as different from Example 1: the moiety of magnesium lithium alloy and mass percent thereof: Li is 12 wt %, and Al is 6 wt %, and Zn is 1 wt %, and surplus is Mg; Impurity element Cu＜0.01wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Obtain magnesium lithium alloy B1.
Comparative Examples 2:
Other experiment condition is with embodiment 1, as different from Example 1: the moiety of magnesium lithium alloy and mass percent thereof: Li is 10 wt %, and Al is 6 wt %, and Zn is 2 wt %, and surplus is Mg; Impurity element Cu＜0.01wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
Obtain magnesium lithium alloy B2.
Performance test:
Adopt electronic universal mechanical test machine to carry out tensile strength, yield strength and unit elongation performance test to H1-H4 and B1-B2 magnesium lithium alloy, adopt Archimedes's method to test its density.Test result sees Table 1:
Table 1
| ? | Tensile strength (MPa) | Yield strength (MPa) | Unit elongation | Density (g/cm3) |
| H1 | 200 | 150 | 65% | 1.31 |
| H2 | 300 | 260 | 17% | 1.60 |
| H3 | 250 | 200 | 30% | 1.45 |
| H4 | 238 | 195 | 38% | 1.41 |
| B1 | 135 | 105 | 65% | 1.30 |
| B2 | 175 | 145 | 28% | 1.45 |
As shown in Table 1, the tensile strength of the relative Comparative Examples 1-2 of embodiment 1-4 and yield strength have had significantly raising, this illustrates that magnesium lithium alloy of the present invention is after having added Ca, Mn and Sc, in the situation that density and unit elongation maintenance are stable, magnesium lithium alloy tensile strength and yield strength have had significantly raising.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. magnesium lithium alloy, it is characterized in that: it comprises following component and content: the Li of 8-12 wt %, the Al of 6-8 wt %, the Zn of 1-3 wt %, the Ca of 0.01-0.2 wt %, the Mn of 0.01-0.2 wt %, the Sc of 1-2 wt %, surplus is Mg; Impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
2. magnesium lithium alloy as claimed in claim 1, it is characterized in that: it comprises following component and content: the Li of 8-10 wt %, the Al of 6-8 wt %, the Zn of 1-3 wt %, the Ca of 0.1-0.2 wt %, the Mn of 0.1-0.2 wt %, the Sc of 1-2 wt %, surplus is Mg; Impurity element Cu＜0.01 wt %, Fe＜0.005 wt %, Ni＜0.005 wt %.
3. magnesium lithium alloy as claimed in claim 1, it is characterized in that: also contain the second rare earth element in the described magnesium lithium alloy, described the second rare earth element is one or more in yttrium, lanthanum, cerium, praseodymium, neodymium or the promethium.
4. magnesium lithium alloy as claimed in claim 3 is characterized in that: take the total mass of Sc and the second rare earth element as benchmark, the content of described the second rare earth element is 4 ~ 6 wt %.
5. magnesium lithium alloy as claimed in claim 1, it is characterized in that: the tensile strength of described magnesium lithium alloy is σ
b=200-300MPa, the yield strength of described magnesium lithium alloy is σ
s=150-260MPa, the unit elongation of described magnesium lithium alloy are δ=17-65%, and the density of affiliated magnesium lithium alloy is 1.31-1.60g/cm3.
6. the preparation method of a magnesium lithium alloy as claimed in claim 1 is characterized in that: comprise the steps:
(1) takes by weighing: proportionally take by weighing magnesium source, lithium source, aluminium source, zinc source, calcium source, manganese source, scandium source;
(2) melting: with the alloy raw material of step (1), drop in the vacuum induction furnace, be filled with protection gas to 1atm, 800-810 ℃ of lower melting after induction furnace is evacuated to vacuum;
(3) casting: aluminium alloy cast under the protection of the environment of protection gas of step (2) is obtained as-cast magnesium alloy;
(4) thermal treatment: described as-cast magnesium alloy is carried out homogenizing thermal treatment at the 300-350 ℃ of lower 21 ~ 27h that keeps, then under 200-300 ℃ of condition, push or rolling.
7. the preparation method of magnesium lithium alloy as claimed in claim 6, it is characterized in that: described protection gas is argon gas.
8. the preparation method of magnesium lithium alloy as claimed in claim 6, it is characterized in that: described magnesium source is the technical pure magnesium ingot; Described lithium source is lithium alloy; Described aluminium source is the technical pure aluminium ingot; Described zinc source is the technical pure zinc ingot metal; Described calcium source is calcium alloy; Described manganese source is manganese alloy; Described scandium source is scandium alloy.
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|---|---|---|---|
| CN2011102919996A CN103031474A (en) | 2011-09-29 | 2011-09-29 | Magnesium lithium alloy |
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|---|---|---|---|
| CN2011102919996A CN103031474A (en) | 2011-09-29 | 2011-09-29 | Magnesium lithium alloy |
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Cited By (16)
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|---|---|---|---|---|
| CN103290287A (en) * | 2013-06-17 | 2013-09-11 | 内蒙古五二特种材料工程技术研究中心 | Rare earth magnesium-lithium alloy sheet and preparation method thereof |
| CN104233024A (en) * | 2014-09-28 | 2014-12-24 | 中南大学 | High-strength two-phase ultralight magnesium lithium alloy and preparation method thereof |
| CN104451305A (en) * | 2014-12-23 | 2015-03-25 | 常熟市凯波冶金建材机械设备厂 | Compressor bearing seat of gas turbine |
| US20160153075A1 (en) * | 2014-12-02 | 2016-06-02 | Amli Materials Technology Co., Ltd. | Magnesium alloy |
| CN106521274A (en) * | 2016-10-27 | 2017-03-22 | 江苏理工学院 | High-strength Mg-Li-Al-Y-Ca alloy and preparation method thereof |
| JP2017160531A (en) * | 2016-01-07 | 2017-09-14 | 安立材料科技股▲ふん▼有限公司 | Light weight magnesium alloy and formation method therefor |
| CN107250401A (en) * | 2015-01-27 | 2017-10-13 | 株式会社三德 | Magnesium lithium alloy, rolling stock and moulded products |
| CN107541630A (en) * | 2016-06-29 | 2018-01-05 | 中国科学院金属研究所 | Effectively strengthen two-phase Mg Li Zn Y magnesium lithium alloys and preparation method using rare earth element y |
| CN107779708A (en) * | 2017-12-08 | 2018-03-09 | 浙江海洋大学 | A kind of high intensity super-light Mg-Li alloy and preparation method thereof |
| CN108642357A (en) * | 2018-07-11 | 2018-10-12 | 上海交通大学 | Ultralight high-strength magnesium lithium alloy of a kind of casting containing Nd and preparation method thereof |
| PL424338A1 (en) * | 2018-01-22 | 2019-07-29 | Instytut Metalurgii I Inżynierii Materiałowej Im. Aleksandra Krupkowskiego Polskiej Akademii Nauk | Ultra-light magnesium alloy for thixotropic casting |
| CN112593131A (en) * | 2020-12-29 | 2021-04-02 | 郑州轻研合金科技有限公司 | High-strength high-plasticity high-yield-ratio magnesium-lithium alloy and preparation method and application thereof |
| CN112593132A (en) * | 2020-12-30 | 2021-04-02 | 郑州轻研合金科技有限公司 | High-strength semi-solid two-phase die-casting magnesium-lithium alloy and preparation method thereof |
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| CN115287514A (en) * | 2018-04-23 | 2022-11-04 | 佳能株式会社 | Magnesium-lithium alloy |
| US11840749B2 (en) | 2018-04-23 | 2023-12-12 | Canon Kabushiki Kaisha | Magnesium-lithium-based alloy |
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| CN103290287A (en) * | 2013-06-17 | 2013-09-11 | 内蒙古五二特种材料工程技术研究中心 | Rare earth magnesium-lithium alloy sheet and preparation method thereof |
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| JP2016128603A (en) * | 2014-12-02 | 2016-07-14 | 安立材料科技股▲ふん▼有限公司 | Magnesium alloy |
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| US10900103B2 (en) | 2015-01-27 | 2021-01-26 | Santokij Corporation | Magnesium-lithium alloy, rolled material and shaped article |
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| CN107541630A (en) * | 2016-06-29 | 2018-01-05 | 中国科学院金属研究所 | Effectively strengthen two-phase Mg Li Zn Y magnesium lithium alloys and preparation method using rare earth element y |
| CN106521274A (en) * | 2016-10-27 | 2017-03-22 | 江苏理工学院 | High-strength Mg-Li-Al-Y-Ca alloy and preparation method thereof |
| CN107779708A (en) * | 2017-12-08 | 2018-03-09 | 浙江海洋大学 | A kind of high intensity super-light Mg-Li alloy and preparation method thereof |
| PL424338A1 (en) * | 2018-01-22 | 2019-07-29 | Instytut Metalurgii I Inżynierii Materiałowej Im. Aleksandra Krupkowskiego Polskiej Akademii Nauk | Ultra-light magnesium alloy for thixotropic casting |
| CN115287514A (en) * | 2018-04-23 | 2022-11-04 | 佳能株式会社 | Magnesium-lithium alloy |
| CN115287514B (en) * | 2018-04-23 | 2023-11-03 | 佳能株式会社 | Magnesium-lithium alloy |
| US11840749B2 (en) | 2018-04-23 | 2023-12-12 | Canon Kabushiki Kaisha | Magnesium-lithium-based alloy |
| CN108642357A (en) * | 2018-07-11 | 2018-10-12 | 上海交通大学 | Ultralight high-strength magnesium lithium alloy of a kind of casting containing Nd and preparation method thereof |
| CN112593131A (en) * | 2020-12-29 | 2021-04-02 | 郑州轻研合金科技有限公司 | High-strength high-plasticity high-yield-ratio magnesium-lithium alloy and preparation method and application thereof |
| CN112593132A (en) * | 2020-12-30 | 2021-04-02 | 郑州轻研合金科技有限公司 | High-strength semi-solid two-phase die-casting magnesium-lithium alloy and preparation method thereof |
| CN113774260A (en) * | 2021-09-24 | 2021-12-10 | 佛山市顺德区跨速头盔有限公司 | Magnesium alloy frame material of variable-speed folding bicycle and preparation method thereof |
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Application publication date: 20130410 |