CN101812620A - magnesium-zinc-zirconium-yttrium-magnesium alloy - Google Patents
magnesium-zinc-zirconium-yttrium-magnesium alloy Download PDFInfo
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Abstract
The invention provides a magnesium-zinc-zirconium-yttrium-magnesium alloy which comprises the following components in percentage by weight: 2.0-4.0% of zinc, 0.2-0.5% of zirconium and 0.9-5.8% of yttrium and the balance magnesium and impurity. The invention improves optional heat deflection temperature range of the alloy by controlling zinc content in the magnesium-zinc-zirconium series magnesium alloy and adding yttrium element with a proper proportion; higher deflection temperature is favorable for improving the heat deflection plasticity of magnesium alloy and improving extrusion rate; and meanwhile, alloy crystalline grain is refined by the action that high melting point second phase containing yttrium prevents crystalline grains from growing in the heat extrusion deformation recrystallization process so as to obtain magnesium alloy with moderate strength and favorable plasticity. The magnesium-zinc-zirconium-yttrium-magnesium alloy with the optimal proportion has the room-temperature tensile strength of 279 MPa, yield strength of 184 MPa and elongation percentage of 28%.
Description
Technical field
The present invention relates to a kind of magnesium alloy materials, particularly a kind of magnesium-zinc-zirconium-yttrium-magnesium alloy that possesses medium tenacity and good plasticity simultaneously.
Background technology
The crystalline structure of magnesium alloy belongs to hexagonal close packed lattice, its plastic deformation ability is not as good as aluminium and steel, increase the difficulty of magnesium alloy plastic working and produced preparation cost, for this reason in the novel magnesium alloy development research in recent years, begun to pay attention to design mutually and adopt mode such as new deformation technique, when guaranteeing certain intensity, more paid attention to improving the plastic working ability of magnesium alloy by the wrought magnesium alloys interalloy.
Magnesium zinc zirconium series magnesium alloy is often used as high-intensity wrought magnesium alloys, use in Aeronautics and Astronautics, weapons and civil car field etc. very extensive, for improving the thermotolerance and the obdurability of magnesium zinc zirconium series magnesium alloy material, researcher has been carried out a large amount of research work, for example people such as Kun Yu has reported that at " Scripta Materialia " 2003 the 48th volumes a kind of novel magnesium zinc zirconium series magnesium alloy Mg-2.8%Ce-0.7%Zn-0.7%Zr (wt.%), this alloy possess the tensile strength of 257.8Mpa and 12% unit elongation at 25 ℃; Again for example, the applying date is that China's patent " a kind of high damping magnesium alloy that contains accurate brilliant wild phase and preparation method thereof " that July 8, patent publication No. in 2009 are CN101603138A discloses a kind of magnesium zinc zirconium series magnesium alloy Mg-0.2%Y-0.1%Zn-0.6%Zr (wt.% that adds rare earth element yttrium, more excellent proportioning among the embodiment), it at room temperature possesses the tensile strength of 179Mpa and 7.2% unit elongation; Again for example, the applying date is that China's patent " effectively utilizing rare earth element y to strengthen Mg-Zn-Y-Zr series magnesium alloy and preparation method " that May 30, patent publication No. in 2007 are CN101314829A discloses a kind of quasi crystal phase fortified Mg-Zn-Y-Zr magnesium alloy and preparation method thereof, problems such as magnesium alloy reinforcement have been solved, tensile strength is 290-360MPa, yield strength is 175-260MPa, and unit elongation is 10-18%; In addition, the applying date is that China's patent " a kind of high plastic magnesium alloy that contains the rare earth yttrium " of on November 11st, 2004, Granted publication CN 1297676C discloses a kind of high plastic magnesium alloy that contains the rare earth yttrium, each constituent mass percentage composition is Zn:5.0-8.5%, Zr:0.6-0.8%, Y:0.7-2.0%, tensile strength is 322-337MPa, and yield strength is 263-267MPa, and unit elongation is 18-21%.From The performance test results, above-mentioned result of study all is to study at high-intensity magnesium zinc zirconium series magnesium alloy to a certain extent, and its plastic property is still limited, is difficult to satisfy the demand of practical application link to wrought magnesium alloys goods temperature-room type plasticity.For example, in industries such as Bicycles and Motorcycles, need undergauge is carried out in the end of magnesium alloy pipe,, can guarantee usually that then necking deformation at room temperature carries out and do not break if the alloy at room temperature unit elongation can be above 23%.The necking deformation of tradition magnesium alloy must carry out being heated to more than 200 ℃, uses the room temperature unit elongation then can reduce the heating link above 23% good plasticity magnesium alloy, reduces production costs.
Summary of the invention
Be difficult to satisfy the demand of practical application link at existing magnesium zinc zirconium series magnesium alloy to wrought magnesium alloys goods temperature-room type plasticity, the purpose of this invention is to provide a kind of medium tenacity that possesses, and room temperature tensile plasticity is good, can satisfy the extruded product magnesium-zinc-zirconium-yttrium-magnesium alloy of post forming at room temperature, by suitable zinc, zirconium, the design of the content of yttrium and zinc-yttrium content proportioning, be equipped with the preceding thermal treatment process of rational extruding, extrusion deformation process, make magnesium alloy of the present invention when satisfying the medium tenacity of most of application needs, have good room temperature tensile plasticity.
The object of the present invention is achieved like this: magnesium-zinc-zirconium-yttrium-magnesium alloy is characterized in that the weight percent of each component in the alloy is zinc: 2.0～4.0%, and zirconium 0.2～0.5%, yttrium: 0.9～5.8%, surplus is magnesium and impurity.
As further preferred version, in the alloy weight ratio of zinc and yttrium be preferably 1: 0.9～2.8.
As further preferred version, the weight percent of described each component is zinc: 2.1%, and zirconium: 0.3%, yttrium: 3.7～5.8%, surplus is magnesium and impurity.
Further, described impurity comprises silicon, nickel, copper and iron, and the weight percent of impurity in alloy is not more than 0.15%.
With respect to prior art, the present invention has following advantage:
1, along with the increase of zinc content, magnesium zinc zirconium series magnesium alloy tensile strength and yield strength can increase, but unit elongation can descend, cause castability, process plastic and the welding property of magnesium alloy to worsen, therefore the zinc content in the strict control magnesium zinc zirconium series magnesium alloy makes it possess medium tenacity and good plasticity simultaneously.
2, yttrium belongs to surface active element, can reduce the melt solid-liquid interfacial tension, the forming core merit of crystal grain is descended, critical forming core radius reduces, forming core is easy, thereby make as-cast structure obtain refinement, in magnesium zinc zirconium series magnesium alloy, add an amount of yttrium, can accelerate nucleation rate, make dendrite interval reduce, crystal grain obtains significantly refinement, has improved the comprehensive mechanical property of magnesium zinc zirconium series magnesium alloy under as cast condition.
3, in magnesium zinc zirconium series magnesium alloy, add an amount of yttrium, generate high-melting-point second phase, can carry out hot extrusion, with the thermal distortion plasticity that improves magnesium zinc zirconium series magnesium alloy, reduce the crimp drag, thereby improve extruding rate by selecting higher texturing temperature for use.
4, Shi Yi zinc-yttrium ratio makes the plasticity of magnesium zinc zirconium series magnesium alloy be able to raising by a relatively large margin.
5, the magnesium alloy preparation method that adopts of the present invention have technology simple, operate easy advantage.
Description of drawings
Fig. 1 is for respectively numbering the Photomicrograph of the as-cast structure of magnesium alloy in the embodiment of the invention 1;
Fig. 2 is for adding the Mg-2.1Zn-0.3Zr magnesium alloy cast DSC graphic representation of different content yttrium;
Fig. 3 is for respectively numbering the Photomicrograph of the crimp tissue of magnesium alloy in the embodiment of the invention 1.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment 1:
Present embodiment is an example with the Mg-2.1Zn-0.3Zr magnesium alloy, and wherein the weight percent of each component is, zinc: 2.1%, and zirconium: 0.3%, impurity≤0.15%, impurity are inevitably hotchpotch such as silicon, nickel, copper, iron, all the other are magnesium.Other provides four groups of Mg-2.1Zn-0.3Zr-Y magnesium alloy that yttrium content is different, with the influence to magnesium zinc zirconium series magnesium alloy over-all properties of the content of explanation zinc, yttrium and ratio.
One, the percent by weight of each component preparation method when
Easy for explaining, magnesium alloy materials to different proportionings in the present embodiment is numbered: it is 0# that the Mg-2.1Zn-0.3Zr magnesium alloy is compiled, all the other four groups of magnesium-zinc-zirconium-yttrium-magnesium alloys are numbered 1#, 2#, 3# and 4# respectively, and each numbers the concrete component of magnesium zinc zirconium series magnesium alloy and percent by weight thereof referring to table 1.
Table 1: each numbers magnesium alloy component (%, weight percent)
The magnesium alloy preparation method technology that the present invention adopts is simple, operation is simple and easy.The concrete steps of preparation magnesium-zinc-zirconium-yttrium-magnesium alloy are:
1) melting: carry out the magnesium alloy preparation by the semicontinuous casting system, refining in resistance furnace, No. 5 flux are as refining agent and insulating covering agent, and system is cast into ingot casting by the water-cooled semicontinuous casting.Magnesium ingot all melts the back and skims in 720 ℃～730 ℃ in the resistance furnace, adds flux No. 5 at clean liquid level; Add zinc then, stirred 3～5 minutes, and add flux and cover, be warming up to 760 ℃, skim once more and stir, add magnesium zirconium and magnesium yttrium master alloy; With No. 5 flux-refinings and leave standstill 20min, wait to cool to 710～730 ℃, pour into the filled circles ingot casting, use CO in melting and the casting process
2And SF
6Mixed gas is protected; At last, by in the Mg-2.1Zn-0.3Zr magnesium alloy, increasing magnesium yttrium master alloy one by one, obtain in the present embodiment with Mg-2.1Zn-0.3Zr magnesium alloy ingot of each numbering that is matrix.
2) machining: extrusion billet is machined to suitable dimension according to extrusion machine container size.
3) homogenizing is handled: 420 ℃ of following homogenizing annealings 12 hours.
4) hot extrusion: under 480 ℃ of extrusion temperatures, be squeezed into bar on extrusion machine, extrusion ratio is 28, and extruded product is cooled off fast.
Two, Mechanics Performance Testing:
According to the standard of GB GB228-2002, present embodiment is respectively numbered magnesium alloy materials become the standard tensile sample to carry out tensile test at room temperature with the crimp post-treatment below through the preceding thermal treatment of extruding.
1) add the influence of yttrium to magnesium zinc zirconium series magnesium alloy cast tissue and mechanical property:
Referring to Fig. 1, showed the Photomicrograph that adds the Mg-2.1Zn-0.3Zr magnesium alloy cast tissue of different content yttrium among the figure, wherein, Fig. 1 a is the as-cast structure of 0# magnesium alloy, Fig. 1 b is the as-cast structure of 1# magnesium alloy, Fig. 1 c is the as-cast structure of 2# magnesium alloy, and Fig. 1 d is the as-cast structure of 3# magnesium alloy, and Fig. 1 e is the as-cast structure of 4# magnesium alloy.Can be seen that by Fig. 1 Mg-2.0Zn-0.3Zr compares with the 0# magnesium alloy, the as-cast structure refinement of adding yttrium 1#, 2#, 3# and 4# magnesium alloy afterwards is very obvious; Comparison diagram 1b, Fig. 1 c and Fig. 1 d as seen, along with the increase of yttrium content, magnesium alloy dendritic arm spacing reduces, the intergranular compound all is continuous fine mesh, also has a small amount of granular compound to occur on matrix; Further compare with Fig. 1 e, when the further 4# magnesium alloy of the content of yttrium 5.8% the time, more yttriums gather partially at the crystal boundary place makes the crystal boundary alligatoring, weakened the constitutional supercooling degree of process of setting, thinning effect weakens, granular compound on the matrix disappears, and the intergranular compound is the lines chap of discontinuous suspension shape and net.
As-cast structure to the magnesium alloy of 0#～4# carries out the alloy material phase analysis, and carries out mechanical property test respectively, investigates its tensile strength (Mpa), yield strength (Mpa) and unit elongation (δ 5%) at room temperature, and is as shown in table 2:
The thing of respectively numbering the magnesium alloy cast tissue among table 2: the embodiment 1 reaches mechanical property mutually
By table 2 as seen, 1# magnesium alloy yttrium addition is 0.9%, with respect to its tensile strength of 0# magnesium alloy of not adding yttrium a small amount of raising is arranged, and yield strength and unit elongation have clear improvement; Along with yttrium content is increased to 1.9%, the tensile strength of 2# magnesium alloy and yield strength continue to be improved, and unit elongation descends to some extent; When yttrium content reached 3.7%, the tensile strength and the yield strength of 3# magnesium alloy further increased, and reach the maximum value in several magnesium alloy, and unit elongation also gos up to some extent, and its comprehensive mechanical property reaches comparatively ideal state; When yttrium content was increased to 5.8%, the intensity and the plasticity of 4# magnesium alloy all reduced.When the yttrium addition was 3.7%, the comprehensive mechanical property of magnesium alloy reached the best in several magnesium alloy, and cast alloy has more excellent plasticity and medium tenacity, and zinc-yttrium ratio is about 1: 1.76 in the magnesium zinc zirconium series magnesium alloy at this moment.
The above-mentioned thing of respectively organizing as-cast magnesium alloy of analysis-by-synthesis reaches the Mechanics Performance Testing result mutually, after adding Yt in the magnesium zinc zirconium series magnesium alloy, cause condensate depression to increase, be increased to a certain degree after, can produce constriction, fusing in the solid-liquid interface junction, the feature of the part second phase nodularization refinement occur.Be no more than before 1.9% at yttrium content, as 1# and 2# magnesium alloy, w-also is present in intragranular with particulate state when crystal boundary occurs, and the granular w-that distributes on the matrix can increase the dislocation motion resistance mutually, improves alloy strength.The 2# magnesium alloy is more obvious than 1# magnesium alloy refining, and more w-phase is arranged, thereby intensity is higher.ZK be in the alloy ratio of zinc and yttrium to have determined to contain yttrium be with w-mutually or other forms exist mutually, identical yttrium addition high Zn content is beneficial to the generation of w-phase.Because the influence of the relative alloy plasticity of w-, though 2# magnesium alloy tissue is thinner than 1# magnesium alloy crystal grain, but plasticity is poorer, too much w-is relative, and plasticity is unfavorable, because w-is cubic structure mutually, there is discordance with α-Mg matrix close-packed hexagonal structure mutually, both atom crystal boundaries are very weak, along with the increase of middle w-phase volume fraction mutually of a-Mg matrix, the plasticity of alloy will obviously reduce.When yttrium content when 1.9% is increased to 3.7%, plasticity raises, its reason be in the former 2# magnesium alloy based on w-mutually be continuous fine mesh intergranular compound, change in the 3# magnesium alloy based on x-discontinuous thick wide screen shape mutually, because w-reduces mutually with the continuous net-shaped compound of intergranular and becomes interrupted shape, all favourable to plasticity, so the unit elongation of 3# magnesium alloy is higher with respect to the 2# magnesium alloy.When yttrium increases to 5.8%, it is thick wide discontinuous netted that the intergranular compound of 4# magnesium alloy keeps, and the ratio of x-phase continues to increase, because x-is 18R long-range modulated structure mutually, size is thick, and its effect that hinders dislocation motion and crystal boundary slippage is not obvious, so its yield strength keeps former level; And because the laminated structure of x-phase is isolated effect to matrix, crackle is easily from the at the interface germinating of x-with matrix, and the increase of x-phase causes 4# magnesium alloy tensile strength and unit elongation all to descend to some extent.In the 3# magnesium alloy, there are a large amount of Mg
3Y
2Zn
3And Mg
12The YZn phase, but this can provide more nucleation sites in hot extrusion process, improve nucleation rate; Simultaneously, the second phase particle to recrystallize after the inhibition of new crystal particle crystal boundary, limited crystal grain growing up at high temperature, finally make the intensity of alloy and plasticity to be improved the greatly refinement of organizing of gadolinium-containing alloy simultaneously.
For the magnesium zinc zirconium series magnesium alloy of 2.1%Zn content among the embodiment, for obtaining better plasticity, need take into account the thinning effect of yttrium and not influence w-phase volume ratio two aspects of plasticity, suitable yttrium addition is between 1.9%～5.8%; As optimal proportion, the addition of yttrium is 3.7% in the Mg-2.1Zn-0.3Zr magnesium alloy of as cast condition, this moment its at room temperature tensile strength be 232Mpa, yield strength is 124MPa, unit elongation can reach 23.5%, has improved about 65.5% than its unit elongation of 0# magnesium alloy that does not add yttrium.
2) add yttrium to magnesium zinc zirconium series magnesium alloy differential thermal Effect on Performance:
Referring to Fig. 2, among the figure Mg-2.1Zn-0.3Zr magnesium alloy cast DSC (DifferentialScanning Calorimetry, the dsc) graphic representation that adds the different content yttrium.Can see that from figure the second phase fusing point of alloy uprises after the interpolation yttrium; Add the difference of yttrium content, the kind of second phase is also different.Along with the increase of yttrium content, the fusing point of second phase that magnesium alloy produces is also more and more higher, and the melting temperature interval of second phase is between 527 ℃～547 ℃, and this temperature is higher than 50 ℃～80 ℃ in conventional Mg-2.1Zn-0.3Zr magnesium alloy.In the magnesium alloy thermal deformation process, the rising of the fusing point of second phase helps magnesium alloy and selects for use higher temperature to push, to improve the thermal distortion plasticity of magnesium alloy; In addition, when temperature raise, the temperature that begins to occur local melting was higher in the magnesium alloy thermal deformation process, can also make magnesium alloy avoid organizing burn-off phenomenon because of the extrusion temperature goods that blank and mould temperature rise seriously produce when higher, help improving extruding rate, enhance productivity.
3) add the influence of yttrium to series magnesium alloy crimp of magnesium zinc zirconium and tensile mechanical properties:
The magnesium alloy of 0#～4# obtains further significantly refinement through 420 ℃ and 12 hours homogenizing thermal treatment and the magnesium alloy compressional deformation tissue after the hot extrusion, and the Photomicrograph of its crimp tissue as shown in Figure 3; Wherein, Fig. 3 a is the crimp tissue of 0# magnesium alloy, and Fig. 3 b is the crimp tissue of 1# magnesium alloy, and Fig. 3 c is the crimp tissue of 2# magnesium alloy, and Fig. 3 d is the crimp tissue of 3# magnesium alloy, and Fig. 3 e is the crimp tissue of 4# magnesium alloy.By contrast, the magnesium alloy grains that adds yttrium is more obvious, and (μ m) is as shown in table 3 for its average grain size:
Respectively number magnesium alloy compressional deformation attitude average grain size among table 3: the embodiment 1
After thermal treatment and crimp before the extruding, each intensity and unit elongation of numbering magnesium alloy is improved once more, and is as shown in table 4:
Respectively number the room temperature tensile mechanical property of magnesium alloy extruding attitude among table 4: the embodiment 1
As shown in Table 4, along with the increase of yttrium content, the crystal grain of extrusion tissue obtains further refinement, and the unit elongation of magnesium alloy is largely increased, and tensile strength also is improved.For the magnesium zinc zirconium series magnesium alloy of 2.1%Zn content among the embodiment, many-sided factor is taken into account consideration from tensile mechanical properties, the yttrium addition is between 1.9%～5.8%, and the room temperature tensile unit elongation of magnesium alloy all reaches more than 23%, has guaranteed that magnesium alloy possesses good working plasticity; As optimal proportion, the addition of yttrium is 5.8% in the Mg-2.1Zn-0.3Zr magnesium alloy of extruding attitude, and its unit elongation maximum can reach 27.98%, has improved about 82.3% than the 0# magnesium alloy that does not add yttrium.
In the 3# of as cast condition magnesium alloy, contain a spot of w-phase, dispersion-strengthened action can be played, but in hot extrusion process, more nucleation sites can be provided, improve nucleation rate; Simultaneously, the second phase particle to recrystallize after the inhibition of new crystal particle crystal boundary, limited crystal grain growing up at high temperature, finally make the intensity of alloy and plasticity to be improved the greatly refinement of organizing of gadolinium-containing alloy simultaneously.But, before hot extrusion, magnesium alloy having been carried out the homogenizing annealing processing, the w-in the 3# magnesium alloy disappears mutually, mainly carries out the modification of alloy mutually by x-.Through crimp, x-phase morphology and distribution change, the small and dispersed that becomes, and along with the increase of x-phase alloy content, the intensity and the plasticity of alloy all are improved.Because the ratio of x-phase is higher in the 4# alloy, therefore through after homogenizing thermal treatment and the hot extrusion before the extruding, the mechanical property of 4# magnesium alloy is more outstanding.
Other embodiment:
Table 5 is the main ingredient percentage composition of magnesium-zinc-zirconium-yttrium-magnesium alloy among other embodiment of the present invention, and pushes the room temperature tensile mechanical property of attitude accordingly:
Table 5: other embodiment of the present invention
Table 5 has been enumerated the mechanical property parameters of several magnesium-zinc-zirconium-yttrium-magnesium alloys of the present invention.Can see in the table, all keep zinc content among each embodiment between 2.0～4.0%, guarantee that magnesium zinc zirconium series magnesium alloy possesses good intensity and plastic property basis simultaneously; And all control zinc-yttrium weight ratio in 1: 0.9～2.8 scopes, guarantee to allow the room temperature working plasticity of magnesium zinc zirconium series magnesium alloy reach more than 23%, make magnesium zinc zirconium series magnesium alloy possess medium tenacity and good plasticity simultaneously by the modification of metallic yttrium.For magnesium zinc zirconium series magnesium alloy, the content by the control zinc element also adds an amount of yttrium, and improving the intensity and the plasticity of alloy, the weight ratio of its zinc and yttrium should be preferably 1: 0.9～and 2.8.
The invention provides a kind of magnesium-zinc-zirconium-yttrium-magnesium alloy, the function difference of each alloying element in magnesium alloy:
Zinc (Zn): increase fluidity of molten, weak grain-refining agent has to form micro-shrinkage porosite tendency, and the precipitation hardening effect is arranged;
Zirconium (Zr): effective grain-refining agent, improve the room temperature tensile property;
Yttrium (Y): the grain refining effect is arranged, improve high temperature tension and creep property, strengthen erosion resistance.
Increase along with zinc content, magnesium zinc zirconium series magnesium alloy tensile strength and yield strength can increase, but unit elongation can descend, cause castability, process plastic and the welding property of magnesium alloy to worsen, therefore the zinc content in the strict control magnesium zinc zirconium series magnesium alloy makes it possess good intensity and plastic property basis simultaneously.Yttrium belongs to surface active element, can reduce the melt solid-liquid interfacial tension, the forming core merit of crystal grain is descended, critical forming core radius reduces, forming core is easy, thereby makes as-cast structure obtain refinement.In mixing the magnesium zinc zirconium series magnesium alloy process of setting of yttrium, yttrium accumulates in the solid-liquid interface forward position and forms Mg
3Y
2Zn
3And Mg
12YZn phase, the reallocation of solute and segregation cause the constitutional supercooling district, solid-liquid interface forward position of dendritic growth to increase, thereby accelerate nucleation rate, make dendrite interval reduce, and crystal grain obtains significantly refinement; Yttrium helps to generate dystectic second phase, can push by selecting higher texturing temperature for use, with the thermal distortion plasticity that improves alloy, reduce the crimp drag, thereby improves extruding rate; Simultaneously, yttrium belongs to surface active element, can reduce the melt solid-liquid interfacial tension, the forming core merit of crystal grain is descended, critical forming core radius reduces, forming core is easy, thereby makes as-cast structure obtain refinement; In the hot extrusion deformation course of processing, recrystallize can take place, and disperse is distributed in high-melting-point on the crystal boundary and contains yttrium second and meet and hinder growing up of new crystal grain, has reduced the speed of grain growth, obtains to contain the distortion extruded product of small grains.The present invention is by adding the yttrium of suitable proportion in magnesium zinc zirconium series magnesium alloy, magnesium zinc zirconium series magnesium alloy heat-drawn wire is improved, help improving the thermal distortion plasticity of magnesium alloy and improve extruding rate, and dystectic second helps the grain refining in the recrystallization process in extrusion process used for forming, can make magnesium zinc zirconium series magnesium alloy possess medium tenacity and good plasticity simultaneously.
Need to prove that above embodiment is unrestricted the present invention with the explanation technical solution of the present invention only.Although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed among the claim scope of the present invention.
Claims (4)
1. magnesium-zinc-zirconium-yttrium-magnesium alloy is characterized in that the weight percent of each component in the alloy is zinc: 2.0～4.0%, 0.2～0.5%, and yttrium: 0.9～5.8%, surplus is magnesium and impurity.
2. magnesium-zinc-zirconium-yttrium-magnesium alloy according to claim 1, it is characterized in that the weight ratio of zinc and yttrium is preferably 1: 0.9 in the alloy～2.8.
3. magnesium-zinc-zirconium-yttrium-magnesium alloy according to claim 1 is characterized in that the weight percent of described each component is zinc: 2.1%, and zirconium: 0.3%, yttrium: 3.7～5.8%, surplus is magnesium and impurity.
4. according to each described magnesium-zinc-zirconium-yttrium-magnesium alloy in the claim 1～3, it is characterized in that described impurity comprises silicon, nickel, copper and iron, the weight percent of impurity in alloy is not more than 0.15%.
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| CN102628135A (en) * | 2012-04-11 | 2012-08-08 | 哈尔滨工程大学 | Magnesium-base rare-earth alloy material and preparation method thereof |
| CN102634711A (en) * | 2012-04-25 | 2012-08-15 | 哈尔滨工程大学 | High-temperature high-toughness deformation magnesium alloy material and preparation method thereof |
| CN103173668A (en) * | 2013-03-15 | 2013-06-26 | 中国航空工业集团公司北京航空材料研究院 | High-strength heat-resisting wrought magnesium alloy |
| CN103498086A (en) * | 2013-09-13 | 2014-01-08 | 郑州大学 | High-strength high-ductility magnesium alloy and preparation process thereof |
| CN103498086B (en) * | 2013-09-13 | 2016-01-27 | 郑州大学 | A kind of high-strength high-toughness magnesium alloy and preparation technology thereof |
| CN105349862A (en) * | 2015-12-02 | 2016-02-24 | 中国兵器科学研究院宁波分院 | High strength and toughness rare earth magnesium alloy material and preparation method thereof |
| CN108796324A (en) * | 2018-07-03 | 2018-11-13 | 重庆大学 | A kind of room temperature high-ductility magnesium-tin-yttrium-zircaloy and preparation method thereof |
| CN109182858A (en) * | 2018-11-14 | 2019-01-11 | 哈尔滨工程大学 | One kind heat resistance magnesium alloy containing Ho and preparation method thereof |
| CN109182858B (en) * | 2018-11-14 | 2020-12-04 | 哈尔滨工程大学 | Ho-containing heat-resistant magnesium alloy and preparation method thereof |
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