CN102618766A - Quasi-crystal enhanced high-strength magnesium-zinc-yttrium (Mg-Zn-Y) alloy and preparation method thereof - Google Patents
Quasi-crystal enhanced high-strength magnesium-zinc-yttrium (Mg-Zn-Y) alloy and preparation method thereof Download PDFInfo
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- CN102618766A CN102618766A CN2012101198612A CN201210119861A CN102618766A CN 102618766 A CN102618766 A CN 102618766A CN 2012101198612 A CN2012101198612 A CN 2012101198612A CN 201210119861 A CN201210119861 A CN 201210119861A CN 102618766 A CN102618766 A CN 102618766A
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Abstract
The invention relates to a high-strength magnesium alloy and a preparation method thereof, in particular to an enhanced high-strength magnesium-zinc-yttrium (Mg-Zn-Y) alloy capable of precipitating small similarly-spherical quasi-crystal phase through solution and aging. The mass percent of chemical elements in the alloy is that: 5 to 6 percent of Zn, 1 percent of Y, Mg supplementing the percentage to 100 percent, and the mass ratio of the Zn and Y falls in between 5 and 6. Zn is added in a form of pure Zn, Y is added in a Mg-Y master-alloy form with Y content of 25 percent by weight, and Mg adopts the industrial pure magnesium. The alloy prepared through preheating, smelting, refining, metal forming and heat treatment consists of alpha-Mg solid melt and icosahedron quasi-crystal phase, the shape of the quasi-crystal phase is similar to a spherical shape, and the size is small. The precipitated quasi-crystal particles are propped against dislocated intermediate pinning and a firm interfaces with a substrate, so that the magnesium alloy can be remarkably strengthened. The tensile strength of the high-strength magnesium alloy is more than 250MPa, and the elongation rate is more than 5 percent. Due to the adoption of the quasi-crystal enhanced high-strength Mg-Zn-Y alloy and the preparation method thereof, the high-strength magnesium can be widely popularized to use in fields such as aviation, aerospace, traffics and the like.
Description
Technical field
The present invention relates to high-strength magnesium alloy material and technology of preparing, particularly a kind of quasicrystal reinforced magnesium alloy and preparation method thereof.
Technical background
Magnesiumalloy is a structural metallic materials the lightest in the practical applications, is described as " 21st century green engineering structural metallic materials ".Along with the fast development in fields such as Aeronautics and Astronautics, traffic, the strong magnesiumalloy of lightweight height ratio is had higher requirement in recent years, on alloy designs, advanced machining technology, seek new breakthrough thereby force people to have to try every means.The Mg-Zn-Y alloy is a kind of very promising high strength and low cost magnesiumalloy, mainly is because this alloy just can obtain having the icosahedral quasicrystal phase (I-phase) of high powerful feature under the routine casting condition.The two-phase coexistent district that has accurate crystalline substance and a-Mg in the Mg-Zn-Y ternary alloy system, this contains accurate brilliant high-performance Mg-Zn-Y alloy to exploitation and has the important engineering meaning.Yet the accurate crystalline phase that is herring-bone form in the Mg-Zn-Y alloy that adopts the routine casting method to prepare is very thick, material mechanical performance is difficult to the contribution that provides useful.
Summary of the invention
The present invention mainly is to above deficiency, provides a kind of particle accurate brilliant high-strength magnesium alloy and preparation method thereof that strengthens.Technical scheme of the present invention is:
(1) select the Mg-Zn-Y alloy, chemical element mass percent in this alloy: 5.0-6.0% Zn, 1.0% Y, surplus is Mg, and Zn and Y mass ratio be between 5 ~ 6, can guarantee to obtain in the as-cast structure accurate crystalline substance and a-Mg two so mutually.
(2) crucible is preheating to 200 ℃, brushes general magnesium alloy smelting and use crucible coating.Crucible is heated to 500 ℃, technical pure Mg is joined in the crucible and begins to feed CO
2+ 0.5vol%SF
6Mixed gas is protected.Continue to be warmed up to 720 ℃ treat that pure magnesium melts fully after, add pure Zn, the Mg-25wt.%Y master alloy; Mg-25wt.%Y master alloy adding mode is for to be pressed in the alloy melt with iron bell jar, and slightly to around move about, prevent gathering partially of rare earth, rare earth is diffused in the liquation rapidly equably.Pure Zn just can take out bell jar after being pressed into the alloy melt bottom with bell jar.Be warmed up to 750 ℃ and be incubated 20 ~ 30 minutes, treat that master alloy, pure Zn melt fully, use C
2Cl
6Carry out the melt refining treatment, after the refining slagging-off and cool the temperature to 700 ℃, pour into the moulding of air cooling metal mold.The whole smelting and pouring process of alloy is all at CO
2+ 0.5vol%SF
6Carry out under mixed gas protected.
(3) heat-treat.Alloy is at first 450 ℃ of following solid solutions 16 hours, then 500 ℃ of solid solutions 20 hours.After treating solution treatment, the artificial aging that sample carried out under 360 ℃ 24 hours is handled.The reason that adopts the segmentation solid solution is to make the abundant solid solution of accurate crystalline phase of difficult solid solution get into matrix.Obtain the accurate brilliant of approximate spherical fine size after the timeliness, can play obvious strengthening effect.
The high-strength magnesium alloy of the present invention's preparation, its benefit is: strength of alloy is greater than 250MPa, and unit elongation is greater than 5%.
In the Mg-Zn-Y ternary alloy system, there is the two-phase coexistent district of accurate crystalline substance and a-Mg, this contains accurate brilliant high-performance Mg-Zn-Y to exploitation and has the important engineering meaning.The accurate brilliant enhancing high-performance Mg-Zn-Y series magnesium alloy crystal grain of routine casting is generally comparatively thick, isolates matrix easily, causes alloy mechanical property on the low side.In order to improve accurate brilliant thick problem; The present invention at first controls as cast condition accurate brilliant form and distribution through permanent mold casting, because the chilling action of metal mold, the alloy rate of cooling is very big; Limited growing up of accurate crystalline substance, to a certain extent refinement accurate crystalline substance and it is disperseed preferably.Next is prepared to contain through heat treating method again and separates out accurate brilliant enhanced Mg-Zn-Y alloy.In heat treatment process, we have adopted the segmentation solid solution treatment process, make the accurate crystalline substance of as cast condition to greatest extent solid solution get into behind the matrix again timeliness and separate out, the accurate crystalline phase of separating out has tiny, the approximate globular characteristic of size can significantly improve alloy strength.
The HS that accurate brilliant enhancing Mg-Zn-Y is an alloy is mainly derived from the strengthening effect of quasicrystal particle, and is accurate brilliant in forming stable accurate crystalline substance/magnesium matrix interface and the strong pinning of dislocation being realized alloy strengthening.
Embodiment
Embodiment 1
Present embodiment is a kind of high-strength Mg-Zn-Y alloy, and its composition is Mg-5wt.%Zn-1wt.%Y, and Zn and Y mass ratio are 5, and wherein Zn adds with industrial Zn, and Y adds with the Mg-25wt.%Y master alloy, and Mg then adopts pure magnesium.
The preparation method of present embodiment is:
The first step is preheating to 200 ℃ with crucible, brushes general magnesium alloy smelting and uses crucible coating;
Second step was heated to 500 ℃ with crucible, and technical pure Mg is joined in the crucible and begins to feed CO
2+ 0.5vol%SF
6Mixed gas is protected;
In the 3rd step, after continuing to be warmed up to pure magnesium and melting fully, add Zn, Mg-25wt.%Y master alloy at 720 ℃.Mg-25wt.%Y master alloy adding mode is for to be pressed in the alloy melt with iron bell jar, and slightly to around move about, prevent gathering partially of rare earth, rare earth is diffused in the liquation rapidly equably.Pure Zn just can take out bell jar after being pressed into the alloy melt bottom with bell jar.
The 4th step was warmed up to 750 ℃ and be incubated 20 ~ 30 minutes, treated that master alloy, pure Zn melt fully;
In the 5th step, use C
2Cl
6Carry out the melt refining treatment, after the refining slagging-off and cool the temperature to 700 ℃, pour into the moulding of air cooling metal mold; The whole smelting and pouring process of alloy is all at CO
2+ 0.5vol%SF
6Carry out under mixed gas protected.
In the 6th step, heat-treat.Alloy at first, is followed 500 ℃ of solid solutions 20 hours after 16 hours 450 ℃ of following solid solutions.After treating solution treatment, the artificial aging that sample carried out under 360 ℃ 24 hours is handled.Timeliness is organized as a-Mg sosoloid, and its inside tiny I-phase that distributing, and accurate crystalline form attitude is approximate spherical.
Alloy sample is carried out mechanics property analysis, and the result shows that the maximum tensile strength of this alloy room temperature is 246MPa, and ys is 60MPa, and unit elongation is 7.4%.
Embodiment 2
Present embodiment is a kind of high-strength Mg-Zn-Y alloy, and it becomes and is Mg-6wt.%Zn-1wt.%Y, and Zn and Y mass ratio are 6, and wherein Zn adds with industrial Zn, and Y adds with the Mg-25wt.%Y master alloy, and Mg then adopts pure magnesium.
The preparation method of present embodiment is:
The first step is preheating to 200 ℃ with crucible, brushes general magnesium alloy smelting and uses crucible coating;
Second step was heated to 500 ℃ with crucible, and technical pure Mg is joined in the crucible and begins to feed CO
2+ 0.5vol%SF
6Mixed gas is protected;
In the 3rd step, after continuing to be warmed up to pure magnesium and melting fully, add Zn, Mg-25wt.%Y master alloy at 720 ℃.Mg-25wt.%Y master alloy adding mode is for to be pressed in the alloy melt with iron bell jar, and slightly to around move about, prevent gathering partially of rare earth, rare earth is diffused in the liquation rapidly equably.Pure Zn just can take out bell jar after being pressed into the alloy melt bottom with bell jar;
The 4th step was warmed up to 750 ℃ and be incubated 20 ~ 30min, treated that master alloy, pure Zn melt fully;
In the 5th step, use C
2Cl
6Carry out the melt refining treatment, after the refining slagging-off and cool the temperature to 700 ℃, pour into the moulding of air cooling metal mold.The whole smelting and pouring process of alloy is all at CO
2+ 0.5vol%SF
6Carry out under mixed gas protected;
In the 6th step, heat-treat.Alloy at first, is followed 500 ℃ of solid solutions 20 hours after 16 hours 450 ℃ of following solid solutions.After treating solution treatment, the artificial aging that sample carried out under 360 ℃ 24 hours is handled.
The alloy aging tissue is similarly a-Mg sosoloid, its inside tiny I-phase that distributing, and accurate crystalline form attitude is approximate spherical.Alloy sample is carried out mechanics property analysis, and the result shows that the maximum tensile strength of this alloy room temperature is 266MPa, and ys is 62MPa, and unit elongation is 7%.
Claims (3)
1. an accurate crystalline substance strengthens high-strength magnesium alloy and preparation method thereof, it is characterized in that:
Select the Mg-Zn-Y alloy, chemical element mass percent in this alloy: 5.0-6.0% Zn, 1.0% Y; Surplus is Mg, and Zn and Y mass ratio be between 5 ~ 6, and wherein Zn adds with pure Zn; Y adds with Mg-25wt.%Y master alloy form, and Mg then adopts pure magnesium.
2. a method for preparing like the said high-strength magnesium alloy of claim 1 is characterized in that, the preparation process is:
The first step is preheating to 200 ℃ with crucible, brushes general magnesium alloy smelting and uses crucible coating;
Second step was heated to 500 ℃ with crucible, and technical pure Mg is joined in the crucible and begins to feed CO
2+ 0.5vol%SF
6Mixed gas is protected;
The 3rd the step, continue to be warmed up to 720 ℃ treat that pure magnesium melts fully after, add pure Zn, the Mg-25wt.%Y master alloy;
In the 4th step, be warmed up to 750 ℃ and be incubated 20 ~ 30 minutes and treat that master alloy, pure Zn melt fully;
In the 5th step, use C
2Cl
6Carry out the melt refining treatment, after the refining slagging-off and cool the temperature to 700 ℃, pour into moulding in the metal type dies, the whole smelting and pouring process of alloy is all at CO
2+ 0.5vol%SF
6Carry out under mixed gas protected;
The 6th step, to heat-treat, alloy at first, is followed 500 ℃ of solid solutions 20 hours after 16 hours 450 ℃ of following solid solutions, and after the solution treatment, the artificial aging that sample carried out under 360 ℃ 24 hours is handled.
3. high-strength magnesium alloy according to claim 1, its tissue signature is: alloy structure is by a-Mg+I-phase two phase composites; A-Mg is Zn, the Y sosoloid in magnesium matrix, and I-phase is the icosahedral quasicrystal phase that timeliness is separated out.
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| CN 201210119861 CN102618766B (en) | 2012-04-23 | 2012-04-23 | Preparation method of quasi-crystal enhanced high-strength magnesium-zinc-yttrium (Mg-Zn-Y) alloy |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320663A (en) * | 2013-05-31 | 2013-09-25 | 中国科学院金属研究所 | Quasicrystal-containing magnesium alloy with high corrosion resistance and preparation method and application thereof |
| CN103993213A (en) * | 2014-05-27 | 2014-08-20 | 华东交通大学 | Method for preparing dual special structure combined reinforced Mg-Zn-Y alloy |
| CN104894445A (en) * | 2015-06-29 | 2015-09-09 | 西南交通大学 | Production method of ultrahigh-ductility Mg-Zn-Y alloy |
| CN105256262A (en) * | 2015-10-29 | 2016-01-20 | 东北大学 | Method for improving aging hardening effect of Mg-Zn-Y alloy through presetting of twin crystals |
| CN105274412A (en) * | 2015-10-16 | 2016-01-27 | 东北大学 | Mg-Zn-Y directional solidification alloy and preparing method thereof |
| CN105714132A (en) * | 2014-12-03 | 2016-06-29 | 华东交通大学 | Preparation method for high-damping material containing quasi-crystal and long-periodic structure at same time |
| CN106191595A (en) * | 2015-05-27 | 2016-12-07 | 本田技研工业株式会社 | Thermostability magnesium casting alloy and manufacture method thereof |
| CN108467962A (en) * | 2018-04-13 | 2018-08-31 | 中北大学 | A kind of preparation method of magnesium zinc yttrium quasi-crystalline substance and boron carbide mixing reinforced type magnesium based composites |
| CN105316550B (en) * | 2015-03-12 | 2019-01-25 | 华东交通大学 | One kind high resistant damping magnesium alloy of phase containing long-periodic structure and preparation method thereof |
| CN109763009A (en) * | 2019-03-07 | 2019-05-17 | 济南大学 | A kind of method of current processing Mg-Zn-Gd quasicrystalline alloy |
| CN109852857A (en) * | 2019-03-29 | 2019-06-07 | 上海交通大学 | High-toughness heat-resistant Mg-Y alloy and preparation method thereof suitable for gravitational casting |
| CN109868402A (en) * | 2019-03-29 | 2019-06-11 | 上海交通大学 | High-toughness heat-resistant die casting Mg-Y alloy and preparation method thereof |
| CN110004343A (en) * | 2019-03-29 | 2019-07-12 | 上海交通大学 | High-toughness heat-resistant Mg-Gd-Er alloy and preparation method thereof suitable for gravitational casting |
| CN111621726A (en) * | 2020-05-22 | 2020-09-04 | 华东交通大学 | Preparation method of high-damping Mg-Zn-Y-based composite material |
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| CN101041874A (en) * | 2006-12-20 | 2007-09-26 | 太原理工大学 | Pseudo-crystal reinforced high zinc magnesium alloy and method for manufacturing same |
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2012
- 2012-04-23 CN CN 201210119861 patent/CN102618766B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN101041874A (en) * | 2006-12-20 | 2007-09-26 | 太原理工大学 | Pseudo-crystal reinforced high zinc magnesium alloy and method for manufacturing same |
Non-Patent Citations (1)
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| YINGBO ZHANG等: "Microstructures and mechanical properties of quasicrystal reinforced Mg matrix composites", 《JOURNAL OF ALLOYS AND COMPOUNDS》, vol. 464, no. 12, 22 September 2009 (2009-09-22), pages 575 - 579 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103320663B (en) * | 2013-05-31 | 2015-06-24 | 中国科学院金属研究所 | Quasicrystal-containing magnesium alloy with high corrosion resistance and preparation method and application thereof |
| CN103320663A (en) * | 2013-05-31 | 2013-09-25 | 中国科学院金属研究所 | Quasicrystal-containing magnesium alloy with high corrosion resistance and preparation method and application thereof |
| CN103993213B (en) * | 2014-05-27 | 2017-11-14 | 华东交通大学 | A kind of preparation method of double special construction phase composite strengthening Mg Zn y alloys |
| CN103993213A (en) * | 2014-05-27 | 2014-08-20 | 华东交通大学 | Method for preparing dual special structure combined reinforced Mg-Zn-Y alloy |
| CN105714132A (en) * | 2014-12-03 | 2016-06-29 | 华东交通大学 | Preparation method for high-damping material containing quasi-crystal and long-periodic structure at same time |
| CN105714132B (en) * | 2014-12-03 | 2018-10-23 | 华东交通大学 | A kind of preparation method of high damping material while containing quasi-crystalline substance and long-periodic structure phase |
| CN105316550B (en) * | 2015-03-12 | 2019-01-25 | 华东交通大学 | One kind high resistant damping magnesium alloy of phase containing long-periodic structure and preparation method thereof |
| CN106191595A (en) * | 2015-05-27 | 2016-12-07 | 本田技研工业株式会社 | Thermostability magnesium casting alloy and manufacture method thereof |
| CN106191595B (en) * | 2015-05-27 | 2018-09-07 | 本田技研工业株式会社 | Heat resistance magnesium casting alloy and its manufacturing method |
| CN104894445A (en) * | 2015-06-29 | 2015-09-09 | 西南交通大学 | Production method of ultrahigh-ductility Mg-Zn-Y alloy |
| CN105274412A (en) * | 2015-10-16 | 2016-01-27 | 东北大学 | Mg-Zn-Y directional solidification alloy and preparing method thereof |
| CN105274412B (en) * | 2015-10-16 | 2017-05-17 | 东北大学 | Mg-Zn-Y directional solidification alloy and preparing method thereof |
| CN105256262A (en) * | 2015-10-29 | 2016-01-20 | 东北大学 | Method for improving aging hardening effect of Mg-Zn-Y alloy through presetting of twin crystals |
| CN108467962A (en) * | 2018-04-13 | 2018-08-31 | 中北大学 | A kind of preparation method of magnesium zinc yttrium quasi-crystalline substance and boron carbide mixing reinforced type magnesium based composites |
| CN108467962B (en) * | 2018-04-13 | 2019-12-17 | 中北大学 | Preparation method of magnesium-zinc-yttrium quasicrystal and boron carbide mixed enhanced magnesium-based composite material |
| CN109763009A (en) * | 2019-03-07 | 2019-05-17 | 济南大学 | A kind of method of current processing Mg-Zn-Gd quasicrystalline alloy |
| CN109852857A (en) * | 2019-03-29 | 2019-06-07 | 上海交通大学 | High-toughness heat-resistant Mg-Y alloy and preparation method thereof suitable for gravitational casting |
| CN109868402A (en) * | 2019-03-29 | 2019-06-11 | 上海交通大学 | High-toughness heat-resistant die casting Mg-Y alloy and preparation method thereof |
| CN110004343A (en) * | 2019-03-29 | 2019-07-12 | 上海交通大学 | High-toughness heat-resistant Mg-Gd-Er alloy and preparation method thereof suitable for gravitational casting |
| CN110004343B (en) * | 2019-03-29 | 2021-07-13 | 上海交通大学 | High-strength high-toughness heat-resistant Mg-Gd-Er alloy suitable for gravity casting and preparation method thereof |
| CN109852857B (en) * | 2019-03-29 | 2021-08-06 | 上海交通大学 | High-strength-toughness heat-resistant Mg-Y alloy suitable for gravity casting and preparation method thereof |
| CN109868402B (en) * | 2019-03-29 | 2021-08-17 | 上海交通大学 | High-strength-toughness heat-resistant die-casting Mg-Y alloy and preparation method thereof |
| CN111621726A (en) * | 2020-05-22 | 2020-09-04 | 华东交通大学 | Preparation method of high-damping Mg-Zn-Y-based composite material |
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