CN100430502C - High-strength magnesium-lithium alloy - Google Patents
High-strength magnesium-lithium alloy Download PDFInfo
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- CN100430502C CN100430502C CNB2007101443399A CN200710144339A CN100430502C CN 100430502 C CN100430502 C CN 100430502C CN B2007101443399 A CNB2007101443399 A CN B2007101443399A CN 200710144339 A CN200710144339 A CN 200710144339A CN 100430502 C CN100430502 C CN 100430502C
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Abstract
The invention provides a magnesium lithium alloy with high intensity, the weight percent composition of which is: Li:4 to 7, Al: 2 to 7, Zn: 0.5 to 2 and Ce: 0.1 to 1.5, and the rest is Mg. The magnesium lithium alloy of the invention has advantages that on the basis of low density, the lithium content is decreased and the intensity of the alloy is improved. Therefore, cost of preparing the alloy can be reduced and the intensity of the alloy can be improved. In addition, reduction of the lithium content can improve corrosion resistance and thermal stability of the magnesium lithium alloy.
Description
(1) technical field
What the present invention relates to is a kind of alloy, specifically a kind of magnesium lithium alloy.
(2) background technology
The density of lithium is 0.53g/cm
3, be 1/3rd of magnesium only, in magnesium alloy, add lithium the density of magnesium alloy will be descended significantly.In addition, lithium is a cubic lattice structure, and the adding of lithium can reduce the axial ratio (c/a value) of magnesium lattice (close-packed hexagonal) even make alloy be made up of cubic(al)grating β phase (solid solution has the Li sosoloid of Mg element), thereby has improved the plasticity of magnesium alloy.
Based on above advantage, magnesium lithium alloy has caused a large amount of concerns of investigation of materials person.Current, the magnesium lithium alloy that obtains industrial application in the world mainly contains the three kinds of trade mark (MA21, MA18 and LA141A), the intensity of these three kinds of alloys all is not that very high (intensity of MA21 is the highest, be 240MPa), therefore magnesium lithium alloy intensity is low is the major issue that people pay close attention to too, people are undertaken magnesium lithium alloy is strengthened by adding alloying element, the disclosed patent of people such as Zhou Tietao (a kind of aluminum magnesium containing alloy materials and preparation method thereof, publication number: adopt Al CN1605650A), Zn, Zr, RE etc. are as the alloy strengthening element, prepared and only contained β phase single-phased alloy, the intensity of this alloy reaches 180-280MPa, and density is 1.31-1.60g/cm
3Related alloy has higher intensity and possesses lower density in this documents, but prepare β phase single-phased alloy, it contains the lithium amount generally more than 11wt%, certainly will cause cost of alloy to increase like this, and cause the corrosion resistance nature of alloy sharply to descend, the thermostability for alloy also has adverse influence simultaneously.Therefore keep on the low-density basis, the low lithium content of exploitation, high-strength magnesium-lithium alloy have great importance for the range of application of expanding super-light Mg-Li alloy.
Magnesium lithium alloy strengthening element commonly used has Al, Zn, Mn etc., and in addition, crystal grain thinning also is a kind of approach of raising alloy strength commonly used, and grain-refining agent commonly used is Zr and rare earth element.Keep on the low-density basis for reaching, the purpose of the low lithium content of exploitation, high-strength magnesium-lithium alloy, the strengthening element of magnesium lithium alloy should be selected the lower alloying element of density (as aluminium) for use as far as possible, reduce the consumption of the higher element of density, the element that adds as grain refining is selected light rare earths (as La, Ce, Pr etc.) for use as far as possible in addition.
(3) summary of the invention
The object of the present invention is to provide a kind of the maintenance on the low-density basis, can hang down the high-strength magnesium-lithium alloy of lithium content, raising intensity.
The object of the present invention is achieved like this: the weight percent of alloy involved in the present invention consists of: Li:4-7%, Al:2-7%, Zn:0.5-2%, Ce:0.1-1.5%, surplus is Mg.
The present invention coordinates the relation between alloy density, lithium content and the intensity on the basis of optimizing alloy element component, be implemented in to keep on the low-density basis low lithium content, raising high strength.
This alloy is formed by magnesium lithium master alloy, magnesium cerium master alloy, pure magnesium, fine aluminium and the pure zinc melting of electrolysis gained.The purity of wherein pure magnesium, fine aluminium and pure zinc is all more than 99.95%.Melting is carried out in vacuum induction furnace, at first furnace atmosphere is evacuated to vacuum state before melting begins, and charges into argon gas then in stove, begins heating (make the fusion process of alloy in be under the argon atmospher state).In melt cast to after the melting metal die, obtain cast alloy.
The cast alloy of gained carries out homogenizing under the condition of 350 ± 10 ℃/24h handles, and the alloy after then homogenizing being handled carries out deformation processing (extruding is or/and rolling).
Magnesium lithium alloy of the present invention, its tensile strength is: 245-300MPa; Yield strength is: 230-280MPa; Unit elongation is: 10-25%; Density is: 1.35-1.62g/cm
3
The technical characterstic of high-strength magnesium lithium alloy involved in the present invention is: when reducing lithium content, for keeping the low density of alloy, improve the content of low density element aluminum in the strengthening element as far as possible, reduce the content of strengthening element middle-high density element as far as possible, and select for use the light rare earths cerium as the grain refining element.The reduction of lithium content makes alloy be in the α single phase region, therefore has higher intensity, while is owing to alloy strengthening element and grain refining element kind and content optimizing and revising, it is excessive to make that alloy can not make the density of alloy increase because of the reduction of lithium content, and these elements have also been brought into play more excellent reinforcement and refining effect for alloy.The advantage of this alloy is: keeping on the low-density basis, lithium content is reduced, improving the intensity of alloy simultaneously.Therefore can reduce the cost of alloy preparation, and improved the intensity (intensity that is possessed apparently higher than the existing industrial application magnesium lithium alloy trade mark in the world) of magnesium lithium alloy, in addition, because the reduction of lithium content makes the corrosion resistance nature of magnesium lithium alloy and thermal stability also be improved.
(4) embodiment
For example the present invention is done in more detail below and describes:
Embodiment 1:
The moiety of magnesium lithium alloy and weight percent thereof are: Li:5%, Al:3%, Zn:1%, Ce:1%, surplus is Mg.Melting is carried out in vacuum induction furnace, at first furnace atmosphere is evacuated to vacuum state below the 1.0Pa before melting begins, and charges into argon gas then in stove, begins heating (make the fusion process of alloy in be under the argon atmospher state).In melt cast to after the melting metal die, obtain cast alloy.The cast alloy of gained carries out homogenizing under the condition of 350 ± 10 ℃/24h handles, and carries out deformation processing (extruding is or/and rolling) after the alloy peeling after then homogenizing being handled.Alloy after the deformation processing carries out the test of mechanical property with electronic universal mechanical test machine, with the density of Archimedes's method test sample.
The tensile strength of gained magnesium lithium alloy is: 270MPa; Yield strength is: 255MPa; Unit elongation is: 18%; Density is: 1.48g/cm
3
Embodiment 2:
The moiety of magnesium lithium alloy and weight percent thereof are: Li:6%, Al:5%, Zn:1.5%, Ce:0.7%, surplus is Mg.Melting is carried out in vacuum induction furnace, at first furnace atmosphere is evacuated to vacuum state below the 1.0Pa before melting begins, and charges into argon gas then in stove, begins heating (make the fusion process of alloy in be under the argon atmospher state).In melt cast to after the melting metal die, obtain cast alloy.The cast alloy of gained carries out homogenizing under the condition of 350 ± 10 ℃/24h handles, and carries out deformation processing (extruding is or/and rolling) after the alloy peeling after then homogenizing being handled.Alloy after the deformation processing carries out the test of mechanical property with electronic universal mechanical test machine, with the density of Archimedes's method test sample.
The tensile strength of gained magnesium lithium alloy is: 290MPa; Yield strength is: 265MPa; Unit elongation is: 13%; Density is: 1.60g/cm
3
Based on above embodiment, can realize keeping on the low-density basis with the present invention, obtain low lithium content, high-strength magnesium-lithium alloy.
Claims (3)
1, a kind of high-strength magnesium-lithium alloy, it is characterized in that: weight percent consists of: Li:4-7%, Al:2-7%, Zn:0.5-2%, Ce:0.1-1.5%, surplus is Mg.
2, high-strength magnesium-lithium alloy according to claim 1, it is characterized in that: weight percent consists of: Li:5%, Al:3%, Zn:1%, Ce:1%, surplus is Mg.
3, high-strength magnesium-lithium alloy according to claim 1, it is characterized in that: weight percent consists of: Li:6%, Al:5%, Zn:1.5%, Ce:0.7%, surplus is Mg.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101443399A CN100430502C (en) | 2007-09-20 | 2007-09-20 | High-strength magnesium-lithium alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101443399A CN100430502C (en) | 2007-09-20 | 2007-09-20 | High-strength magnesium-lithium alloy |
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| CN101121981A CN101121981A (en) | 2008-02-13 |
| CN100430502C true CN100430502C (en) | 2008-11-05 |
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| CNB2007101443399A Expired - Fee Related CN100430502C (en) | 2007-09-20 | 2007-09-20 | High-strength magnesium-lithium alloy |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372220B (en) * | 2014-10-11 | 2016-08-03 | 哈尔滨工程大学 | High strain rate superplasticity magnesium lithium alloy material and preparation method thereof |
| TWI537395B (en) * | 2014-12-02 | 2016-06-11 | 安立材料科技股份有限公司 | Magnesium alloy |
| TWI545202B (en) | 2016-01-07 | 2016-08-11 | 安立材料科技股份有限公司 | Light magnesium alloy and method for forming the same |
| CN106148787B (en) * | 2016-08-22 | 2019-06-21 | 上海交通大学 | Magnesium lithium alloy and preparation method thereof suitable for sand casting |
| CN107022706A (en) * | 2017-03-31 | 2017-08-08 | 郑州轻研合金科技有限公司 | A kind of preparation method of low lithium high-ductility high strength magnesium lithium alloy and its sheet material |
| CN107779707B (en) * | 2017-12-08 | 2019-08-02 | 浙江海洋大学 | A kind of shock proof magnesium lithium alloy and preparation method thereof |
| CN108315574A (en) * | 2018-02-05 | 2018-07-24 | 江苏中科亚美新材料有限公司 | A kind of production method of magnesium lithium alloy |
| JP7362267B2 (en) | 2018-04-23 | 2023-10-17 | キヤノン株式会社 | Magnesium-lithium alloys, optical equipment, imaging devices, electronic equipment, and mobile objects |
| CN115287514B (en) * | 2018-04-23 | 2023-11-03 | 佳能株式会社 | Magnesium-lithium alloy |
| CN110343923B (en) * | 2019-08-23 | 2020-12-22 | 王习宇 | Low-density high-strength high-plasticity magnesium-lithium alloy and preparation method thereof |
| CN111349834B (en) * | 2020-03-09 | 2021-11-12 | 上海交通大学 | Micro-nano dual-phase hybrid particle reinforced magnesium-lithium-based composite material and preparation method thereof |
| CN112593131B (en) * | 2020-12-29 | 2022-02-18 | 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5059390A (en) * | 1989-06-14 | 1991-10-22 | Aluminum Company Of America | Dual-phase, magnesium-based alloy having improved properties |
| CN1876872A (en) * | 2006-06-27 | 2006-12-13 | 陈继忠 | Manganese aluminium silicon-lithium rare earth alloy and preparation method thereof |
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2007
- 2007-09-20 CN CNB2007101443399A patent/CN100430502C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5059390A (en) * | 1989-06-14 | 1991-10-22 | Aluminum Company Of America | Dual-phase, magnesium-based alloy having improved properties |
| CN1876872A (en) * | 2006-06-27 | 2006-12-13 | 陈继忠 | Manganese aluminium silicon-lithium rare earth alloy and preparation method thereof |
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