CN101240391A - Equilibrium optimized binary reinforcement damping magnesium alloy and preparation method thereof - Google Patents
Equilibrium optimized binary reinforcement damping magnesium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a balanced optimized binary reinforced damping magnesium alloy and preparation thereof. The composition general formula of the alloy is represented as: Mg-3wt%Zn-3wt%RE; the RE is La, Ce, Pr or Nd, the impurity elements are Fe, Ni, Cu and Si, the total amount is less than 0.05wt%, the Mg balancing total amount is 100%. The invention is a method for designing and preparing binary reinforced damping magnesium alloy having medium rigidity, medium strength, high-medium damping and medium raw material cost, the prepared alloy is beneficial for balancing required elements in practical application, including optimized rigid, wide frequency band, wide strain amplitude, wide temperature zone, strength, enough high-temperature-resistance, creep resistance, toughness, price, anticorrosion treatment and heat processing, and is beneficial for solving the problems in industry, such as lacking of variety of damping magnesium base alloy, selecting and using of rare-earth resource or drawback of substitution.
Description
Technical field
The present invention relates to binary reinforcement damping magnesium alloy of a kind of balance optimizing and preparation method thereof, particularly relating to the homophylic light rare earths La of chemical property, Ce, Pr and Nd and metallic zinc is to optimize element and strengthening element, rigidity equilibrium, damping and amortization, intensity and flexible damping Magnuminium and preparation method.
Background technology
Have good rigidity, better damping and amortization arranged in wideband section, wide strain amplitude and wide temperature range, higher-strength, enough high temperature resistant and creep resistance, suitable toughness and price, be beneficial to rotproofing and hot worked damping Magnuminium has the intensive market requirement.MAGNESIUM METAL is owing to self exist desired slip face and slip system, is one of preferred raw materials of dislocation type damping alloy, and particularly MAGNESIUM METAL has the lightweight characteristics, more becomes the irreplaceable metallic substance in application scenario such as loss of weight or energy-saving and emission-reduction.
But, outside the advantage such as good and lightweight of MAGNESIUM METAL damping more deficiencies show perishable, high temperature resistant and creep resistance poor, strength and stiffness do not reach requirement when being used to specify device.Obviously, any damping alloy must satisfy structure-function integration requirement in practical application.Select to strengthen element, by concerning between the actual demand key elements such as rigidity equilibrium, damping and amortization, intensity, high temperature resistant, creep resistance, price, anticorrosion aftertreatment and hot-work, become design and optimize the point of penetration of the research and development of damping Magnuminium with structure-function integration character.
Up to the present, select the kind of enhancing element or polynary enhancing element to be used for concerning between the above-mentioned actual demand key elements such as rigidity equilibrium, damping and amortization, intensity to be very difficult.Show so far from 1958, various countries widely apply still for the Mg-0.6Zr of Weissman invention with improve acquisition KISI alloy on its basis; Such damping alloy belongs to the Zr monobasic and strengthens and with the damping magnesium alloy of Zr balance optimizing, promptly selecting the quantity of enhancing element kind is a kind of (monobasic enhancing), still continuing (Proceedings in Physics,, 26 volumes in 2006 to its research today and improvement, 3,4 phases, P419-422).
In January, 2007, Patent Office of the People's Republic of China discloses No. 200610010326.8 patents that are entitled as " Cariaceous high-damping deformation magnesium alloy and preparation method thereof ", this invention is for Mg-0.58Zr-0.2Cu-0.1Mn, Mg-3.2Cu-0.8Mn-0.2Ce and three alloy systems of Mg-3.4Si-0.3Cu, by multiway forging, ECAP or means such as MDF intense plastic strain or conventional hot extrusion, obtain to have fine intensity, rigidity and ratio of damping Q
-1Damping magnesium alloy for the 0.013-0.023 scope.This invention shows slightly insufficient place: constitute the corrosive microbattery owing to the corrosion potential polarization of Cu with matrix Mg, the interpolation of Cu can become the source of corrosion of alloy.This inventive principle place similar to the present invention shows: add the crystal grain thinning element, notice when improving alloy mechanical property that balance reduces the problems such as quantity of the weak pinning point of dislocation.But the little copper of solid solubility is added in this invention in pure magnesium different in essence with the design that the present invention adds rare earth and zinc with the design of alloy elements such as silicon, do not constitute the restriction to novelty of the present invention.
In September, 2007, Patent Office of the People's Republic of China is to being entitled as " Mg
2The preparation method of Si/Mg-9Al-Y high damping composite material " No. 200510110427.8 license.This invention makes the room temperature ratio of damping tan δ maximum value that consists of Mg-1wt%Si-0.6wt%Y-0.3wt%RE-0.5wt%Sb, Mg-2wt%Si-0.7wt%Y-0.3wt%RE-0.5wt%Sb and Mg-3wt%Si-0.8wt%Y-0.3wt%RE-0.5wt%Sb three individual system reach 0.037,0.053 and 0.068 respectively, on average doubles with 0.025 of reference alloys AZ91 ratio of damping tan δ.And on average improve 20% than AZ91 alloy 150 ℃ of following tensile strength.This invention advantage is: obtaining optimum result preferably aspect rigidity equilibrium, damping and amortization and the wide humidity province property three elements, but relatively defective is that toughness and anti-grain boundary corrosion aspect balance optimizing are relatively poor, because Mg
2Si exists, increases substantially rigidity, temperature resistant grade and crystal boundary damping simultaneously with thick Chinese character shape on crystal boundary, the negative effect that is difficult to overcome is high fragility and low anti-grain boundary corrosion; As this this material of invention problem definition is " matrix material ", and is not defined as alloy and since alloy as a rule toughness can not go to zero.Invention similarly also has:
No. 200510024792.7 the patent that is entitled as " copper-plated graphite granule reinforced magnesium base composite material " that in May, 2007, China Patent Office was authorized, No. 200510027718.0 the patent that is entitled as " preparation method of titanium particle reinforced magnesium base composite material " that authorize in January, 2007 and No. 200510024930.1 the patent that is entitled as " copper-plated silicon carbide particle reinforced magnesium based compound material ".These are defined as " matrix material " and the invention that is not defined as alloy is obviously many-sided significantly different with the present invention in design and purposes etc.; Do not constitute novelty restriction of the present invention.
In September, 2003, United States Patent (USP) trademark office discloses No. 20030165395 patents that Japanese inventor is entitled as " formation of damping alloy and production technique thereof, damping or vibrationproof goods or its use ", and this invention matrix alloy consists of the Mg-(Cu-of 16.9wt%～the 27.7wt%) (Ni-of 2.1wt%～the 8.2wt%) (Fe of 1wt%～2.9wt%); And expect to be used for bike, this invention does not so far retrieve the information of being authorized by United States Patent (USP) trademark office.Obviously, this invention by add Cu, Ni, Fe obtains high damping, and Cu, Ni, Fe bring Magnuminium into and equal to bring into fatal source of corrosion.This is invented this bold design and is never promoted and the international counterparts approval, Japanese scholar Sugimoto research and proposition Mg-were (since 0.5wt%～19wt%) the Ni system is hopeful to obtain the high damping magnesium alloy as far back as 1977, though add the Ni damping magnesium alloy in Japanese publication some patents, even also obtain to widely apply in Japan.Similarly, to develop the MCM that adds Cu and Mn be alloy in nineteen ninety in Japan, such as MC31 (Mg-3%Cu-1%Mn) damping magnesium alloy, even patent disclosure is arranged, also approval (the China YouSe Acta Metallurgica Sinica [J] of widely applying and going together, 2005,15 volumes, 9 phases, P1319-1325).This type of invention or prior art obviously do not constitute novelty restriction of the present invention yet.
Up to the present, the damping magnesium alloy of the actual extensive application in various countries is the alloy that Mg-(0.6%～0.7%) Zr forms, and basic reason is that this alloy is in balance optimizing rigidity, wideband section, wide strain amplitude, wide temperature range, intensity, enough obtain comprehensive good result aspect the key elements such as high temperature resistant, creep resistance, toughness, price, rotproofing and hot-work.Nineteen thirty-seven, German inventor Sauerwald finds: the metal zirconium (Zr), the energy intensive refinement magnesium alloy crystal grain that add 0.1wt%～2wt% in magnesium.Subsequently, in November, 1938, Sauerwald found that again the rare earth metal yttrium (Y) that adds 0.1wt%～2.5wt% in magnesium also can play refinement magnesium alloy crystal grain and the effect (USP2,219,056) that improves alloy mechanical property.The design that substitutes Zr refinement magnesium alloy crystal grain with rare earth is generally approved by the whole world.But with the present invention with rare earth fining magnesium alloy crystal grain simultaneously, balance optimizing rigidity, wideband section, wide strain amplitude, wide temperature range, intensity, enough high temperature resistant, creep resistance, toughness, price, be beneficial to rotproofing and be beneficial to the design that key element such as hot-work obtains high-quality damping magnesium alloy and do not see patent disclosure and article report.
Summary of the invention
The objective of the invention is to the kind deficiency that exists at existing damping magnesium alloy, provide with light rare earths and the enhancing of zinc binary and to damping and mechanical property and carry out novel damping Magnuminium of balance optimizing and preparation method thereof.Solve industrial alternative damping Magnuminium kind few and rare earth resources selection utilization or the insufficient problem of alternative usability.
The binary reinforcement damping magnesium alloy of balance optimizing, it is formed general formula and is expressed as: Mg-3wt%Zn-3wt%RE; Described RE is La, Ce, Pr or Nd, and the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100%.
The preparation method of the binary reinforcement damping magnesium alloy of balance optimizing is characterized in that, step and condition are as follows:
1) raw material is: purity is 99.9% Mg ingot, purity is 99.98% Metal Zn ingot, the Mg-RE master alloy is that purity is 99.5% Mg-La, Mg-Ce, Mg-Pr and Mg-Nd intermediate alloy ingot, and described intermediate alloy ingot middle-weight rare earths accounts for the master alloy weight percent respectively and is: the La in the Mg-La master alloy accounts for 17wt%; Ce in the Mg-Ce master alloy accounts for 23wt%; Pr in the Mg-Pr master alloy accounts for 20wt%; Nd in the Mg-Nd master alloy accounts for 28wt%; Metal M g ingot;
2) metal M g ingot, Metal Zn ingot and Mg-RE intermediate alloy ingot be through cutting apart, oil removing, and dry and scale removal obtains blockly expecting; Carry out weigh batching according to formula M g-3wt%Zn-3wt%RE proportioning; Alloy melting carries out in the gas shield resistance furnace, use earlier KCl: the NaCl weight ratio is that 3: 1 fused salt cleans plumbago crucible, crucible is put into be preheated to 500 ℃ in the resistance furnace then, the feeding shielding gas, this shielding gas consist of CO
2The volume fraction of gas is 50%, SF
6The volume fraction of gas is 0.3%, with air balance volume fraction to 100%; The MAG block of packing into subsequently is warming up to 720 ℃, treat that the Mg piece all is warming up to 750 ℃ after the fusing, add Zn piece and Mg-RE master alloy piece successively respectively, be warming up to 780 ℃ again after, stirred 1 minute, leave standstill 30min at 780 ℃, stop, treating that furnace temperature is cooled to 720 ℃ the stove heat supply, the alloy pushing off the slag is cast in the cast iron mould that is preheated to 300 ℃ in advance, the mould air cooling is to room temperature, and the alloy depanning obtains the binary reinforcement damping magnesium alloy of balance optimizing.
The damping capacity of this as cast condition damping Magnuminium is measured on MAK-04 type viscoelastic analyser, and its damping sample size is diameter 6mm, highly for 20mm.
Preparation method's advantage of the present invention is:
1, light rare earths La and metallic zinc strengthen element for optimizing in element and the Magnuminium, all are controlled at addition under the condition of 3wt%, compare with pure metal magnesium, rigidity improves that about 4.5 times of (Fig. 6), intensity improve about 1.5 times (Fig. 7) and damping and amortization on average reduces in 0～10Hz frequency range less than 1/2 (Fig. 1-5); Obtain well to optimize effect between rigidity and the damping and amortization; And toughness (pure metal and interpolation among Fig. 8 " alloy of La " elongation advolution) also obtains well to optimize effect, is extruding or rolling laying the foundation of alloy subsequent processing.
Similarly, the alloy of interpolation light rare earths Ce, Pr or Nd acquisition also obtains to optimize preferably effect.The binary reinforcement damping magnesium alloy that discloses balance optimizing such as Fig. 6-7 obtains large increase than the rigidity and the intensity of pure as cast metal magnesium, and the binary reinforcement damping magnesium alloy that Fig. 1-5 discloses balance optimizing on average reduces less than 1/2 in 0～100Hz frequency range than the damping and amortization of pure as cast metal magnesium.
2, the binary reinforcement damping magnesium alloy of balance optimizing is four kinds of rare earth alloies, has increased the damping Magnuminium kind of industrial available application.Identical processing condition can be used for producing the binary reinforcement damping magnesium alloy of four kinds of balance optimizings, and these four kinds of alloys can be realized substituting mutually technically, are beneficial to the efficient and sustainable use of rare earth resources, and technique effect and economic benefit are good.
3, gravity segregation and component segregation are little in the magnesium-zinc-lanthanon alloy of medium Zn content (containing zinc 3%) and medium RE content (containing RE3%), the castingprocesses; High zinc content or high rare-earth content alloy, the excessive gravity that brings of strengthening element total amount and component segregation problem have been avoided.Only select for use zinc and chemical property homophylic light rare earths to be arranged for optimizing and strengthening element, also avoided because add more multielement, such as quaternary or five yuan of strengthening elements, multiple elemental interactions is unfavorable for the drawback of the problem of studying science.Do not add the high precious metals such as Zr of market value, property/price ratio is moderate, is beneficial to meet the need of market.
Description of drawings
Fig. 1 is that the binary reinforcement damping magnesium alloy of balance optimizing provided by the invention is 20 hertz in room temperature, frequency and concerns representative curve figure with adding between the different rare earth elements.With as cast condition pure metal magnesium is the blank sample; La on Fig. 1 coordinate axis transverse axis, Ce, Pr and Nd symbol, representative respectively: " Mg-3wt%Zn-3wt%La; impurity element Fe; Ni; the total amount of Cu and Si is less than 0.05wt%; " with the cast alloy of Mg balance total amount to 100% composition, " Mg-3wt%Zn-3wt%Ce; impurity element Fe; Ni; the total amount of Cu and Si is less than 0.05wt%; " with the cast alloy of Mg balance total amount to 100% composition, " Mg-3wt%Zn-3wt%Pr; impurity element Fe; Ni; the total amount of Cu and Si is less than 0.05wt%; " and " Mg-3wt%Zn-3wt%; impurity element Fe with the cast alloy of Mg balance total amount to 100% composition, Ni, the total amount of Cu and Si is less than 0.05wt%, cast alloy with Mg balance total amount to 100% composition ", and the as cast condition pure metal magnesium that on behalf of cold die casting, symbol M g produce.
Appear among the La on the transverse axis, Ce among Fig. 2-8, Pr, Nd and Mg symbol and Fig. 1 and represent the intension of implication identical on the transverse axis, not repeat specification.
The graphic representation that Fig. 2,3,4 and 5 also concerns between the different rare earth elements for ratio of damping and interpolation.Except that the frequency difference that puts on sample, all the other conditions are all identical with method for expressing etc.Wherein Fig. 2,3,4 and 5 sample apply frequency and are respectively 40 hertz, 60 hertz, 80 hertz and 100 hertz.Appear at the La on the transverse axis, Ce among Fig. 2-5, Pr, Nd and Mg symbol, with Fig. 1 in represent the intension of implication identical on the transverse axis, not repeat specification.
Fig. 6 is that the binary reinforcement damping magnesium alloy of balance optimizing of the present invention concerns representative curve figure in the room temperature yield strength with adding between the different rare earth elements.With as cast condition pure metal magnesium is the blank sample.Appear at the La on the transverse axis, Ce among Fig. 6, Pr, Nd and Mg symbol, with Fig. 1 in represent the intension of implication identical on the transverse axis, not repeat specification.
Fig. 7 is that the binary reinforcement damping magnesium alloy of balance optimizing of the present invention concerns representative curve figure in room temperature tensile strength with adding between the different rare earth elements.With as cast condition pure metal magnesium is the blank sample.Appear at the La on the transverse axis, Ce among Fig. 7, Pr, Nd and Mg symbol, with Fig. 1 in represent the intension of implication identical on the transverse axis, not repeat specification.
Fig. 8 is that the binary reinforcement damping magnesium alloy of balance optimizing of the present invention concerns representative curve figure at the room temperature elongation with adding between the different rare earth elements.With as cast condition pure metal magnesium is the blank sample.
Fig. 9 is the cast alloy that " Mg-3wt%Zn-3wt%Pr, the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " of the present invention forms " typical metallographic optical photograph.
Figure 10 is the cast alloy that " Mg-3wt%Zn-3wt%Nd, the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " of the present invention forms " typical metallographic optical photograph.
Figure 11 is the cast alloy that " Mg-3wt%Zn-3wt%Pr; the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " forms in the binary reinforcement damping magnesium alloy of balance optimizing of invention " typical XRD analysis result.
Figure 12 is the cast alloy that " Mg-3wt%Zn-3wt%Nd; the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " forms in the binary reinforcement damping magnesium alloy of balance optimizing of invention " typical XRD analysis result.
Figure 13 is the cast alloy that " Mg-3wt%Zn-3wt%La, the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " of the present invention forms " typical metallographic optical photograph.
Figure 14 is the cast alloy that " Mg-3wt%Zn-3wt%Ce, the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " of the present invention forms " typical metallographic optical photograph.
Figure 15 is the cast alloy that " Mg-3wt%Zn-3wt%La; the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " forms in the binary reinforcement damping magnesium alloy of balance optimizing of invention " typical XRD analysis result.
Figure 16 is the cast alloy that " Mg-3wt%Zn-3wt%Ce; the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100% " forms in the binary reinforcement damping magnesium alloy of balance optimizing of invention " typical XRD analysis result.
Embodiment
Embodiment 1:
Carry out batch weighing according to the Mg-3wt%Zn-3wt%La proportioning.The step and the condition of preparation are as follows: with purity is that 99.9% Mg ingot, purity are that 99.8% Zn ingot, purity are that 99.5% Mg-La intermediate alloy ingot is a raw material, and it is 17wt% that the La in the Mg-La master alloy accounts for the master alloy weight percent, and all the other are Mg.
Mg ingot, Zn ingot and intermediate alloy ingot raw material through cut apart, oil removing, drying and scale removal obtain block material; Carry out weigh batching according to formula M g-3wt%Zn-3wt%RE proportioning; Alloy melting carries out in the gas shield resistance furnace, uses earlier KCl: the NaCl weight ratio is that 3: 1 fused salt cleans plumbago crucible, crucible is put into be preheated to 500 ℃ in the resistance furnace then, feeds protection gas, and this protection gas consists of: CO
2The volume fraction of gas accounts for 50%, SF
6The volume fraction of gas accounts for 0.3%, uses air balance volume fraction to 100%; The MAG block of packing into subsequently is warming up to 720 ℃, treat that the Mg piece all is warming up to 750 ℃ after the fusing, add Zn piece and Mg-La master alloy piece successively, be warming up to 780 ℃ again after, stirred 1 minute, leave standstill 30min at 780 ℃, stop the stove heat supply, treat that furnace temperature is cooled to 720 ℃, the alloy pushing off the slag is cast in the cast iron mould that is preheated to 300 ℃ in advance, the mould air cooling is to room temperature, the alloy depanning, the binary reinforcement damping magnesium alloy of acquisition Mg-3wt%Zn-3wt%La balance optimizing.
The damping capacity of the binary reinforcement damping magnesium alloy of this Mg-3wt%Zn-3wt%La balance optimizing is measured on MAK-04 type viscoelastic analyser, and its damping sample size is diameter 6mm, highly for 20mm; Simultaneously, be the blank sample blank determination with as cast condition pure metal magnesium.In temperature is that room temperature, frequency are under 20 hertz, 40 hertz, 60 hertz, 80 hertz and 80 hertz, and the ratio of damping of the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%La balance optimizing and as cast condition pure metal magnesium ratio of damping are listed in table 1.
At room temperature, the tensile strength (σ of the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%La balance optimizing
b) be 136MPa, yield strength (σ
0.2) be 96MPa, elongation (δ) is 4%.
Mg-3wt%Zn-3wt%La among table 1 embodiment 1
With as cast condition pure metal magnesium at 0～100Hz frequency range internal damping coefficient (tan δ)
| Index | 20Hz | 40Hz | 60Hz | 80Hz | 100Hz |
| The ratio of damping of the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%La balance optimizing (tan δ) | 0.0308 | 0.0299 | 0.0291 | 0.0282 | 0.0273 |
| The ratio of damping of as cast condition pure metal magnesium (tan δ) | 0.0515 | 0.0463 | 0.0424 | 0.0411 | 0.0407 |
Embodiment 2:
Different is with " Mg-3wt%Zn-3wt%Ce alloy system " replacement " Mg-3wt%Zn-3wt%La alloy " system with embodiment 1; Wherein the Ce in the Mg-Ce master alloy accounts for master alloy 23wt%; All the other operational conditions are with embodiment 1.
Under the room temperature, the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Ce balance optimizing is listed in table 2 at 0～100Hz frequency range internal damping coefficient.
Under the room temperature, the tensile strength (σ of the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Ce balance optimizing
b) be 108MPa, yield strength (σ
0.2) be 72MPa, elongation (δ) is 1.8%.
The binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Ce balance optimizing among table 2 embodiment 2
With as cast condition pure metal magnesium at 0～100Hz frequency range internal damping coefficient (tan δ)
| Index | 20Hz | 40Hz | 60Hz | 80Hz | 100Hz |
| The ratio of damping of the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Ce balance optimizing (tan δ) | 0.0433 | 0.0381 | 0.0385 | 0.034 | 0.0305 |
Embodiment 3: different is with " Mg-3wt%Zn-3wt%Pr alloy system " replacement " Mg-3wt%Zn-3wt%La alloy " system with embodiment 1; Wherein the Pr in the Mg-Pr master alloy accounts for master alloy 20wt%; All the other operational conditions are with embodiment 1.
Under the room temperature, the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Pr balance optimizing is listed in table 3 at 0～100Hz frequency range internal damping coefficient.
Under the room temperature, the binary reinforcement damping magnesium alloy tensile strength (σ of Mg-3wt%Zn-3wt%Pr balance optimizing
b) be 134MPa, yield strength (σ
0.2) be 87MPa, elongation (δ) is 2.7%.
The binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Pr balance optimizing among table 3 embodiment 3
With as cast condition pure metal magnesium at 0～100Hz frequency range internal damping coefficient (tan δ)
| Index | 20Hz | 40Hz | 60Hz | 80Hz | 100Hz |
| The ratio of damping of the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Pr balance optimizing (tan δ) | 0.044 | 0.0433 | 0.0423 | 0.0392 | 0.0354 |
Embodiment 4:
Different is with " Mg-3wt%Zn-3wt%Nd alloy system " replacement " Mg-3wt%Zn-3wt%La alloy " system with embodiment 1; Wherein the Nd in the Mg-Nd master alloy accounts for master alloy 28wt%; All the other operational conditions are with embodiment 1.
Under the room temperature, the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Nd as cast condition balance optimizing is listed in table 4 at 0～100Hz frequency range internal damping coefficient.
Under the room temperature, the binary reinforcement damping magnesium alloy tensile strength (σ of Mg-3wt%Zn-3wt%Nd balance optimizing
b) be 111MPa, yield strength (σ
0.2) be 63MPa, elongation (δ) is 2.3%.
The binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Nd balance optimizing among table 4 embodiment 4
With as cast condition pure metal magnesium at 0～100Hz frequency range internal damping coefficient (tan δ)
| Index | 20Hz | 40Hz | 60Hz | 80Hz | 100Hz |
| The ratio of damping of the binary reinforcement damping magnesium alloy of Mg-3wt%Zn-3wt%Nd balance optimizing (tan δ) | 0.0502 | 0.043 | 0.0409 | 0.0395 | 0.0386 |
Claims (2)
1, the binary reinforcement damping magnesium alloy of balance optimizing is characterized in that, it is formed general formula and is expressed as: Mg-3wt%Zn-3wt%RE; Described RE is La, Ce, Pr or Nd, and the total amount of impurity element Fe, Ni, Cu and Si is less than 0.05wt%, with Mg balance total amount to 100%.
2, the preparation method of the binary reinforcement damping magnesium alloy of balance optimizing as claimed in claim 1 is characterized in that, step and condition are as follows:
1) raw material is: purity is 99.9% Mg ingot, purity is 99.98% Metal Zn ingot, purity is 99.5% Mg-La, Mg-Ce, Mg-Pr and Mg-Nd intermediate alloy ingot, and described intermediate alloy ingot middle-weight rare earths accounts for the master alloy weight percent respectively and is: the La in the Mg-La master alloy accounts for 17wt%; Ce in the Mg-Ce master alloy accounts for 23wt%; Pr in the Mg-Pr master alloy accounts for 20wt%; Nd in the Mg-Nd master alloy accounts for 28wt%; Metal M g ingot;
2) metal M g ingot, Metal Zn ingot and intermediate alloy ingot be through cutting apart, oil removing, and dry and scale removal obtains blockly expecting; Carry out weigh batching according to formula M g-3wt%Zn-3wt%RE proportioning; Alloy melting carries out in the gas shield resistance furnace, use earlier KCl: the NaCl weight ratio is that 3: 1 fused salt cleans plumbago crucible, crucible is put into be preheated to 500 ℃ in the resistance furnace then, the feeding shielding gas, this shielding gas consist of CO
2The volume fraction of gas is 50%, SF
6The volume fraction of gas is 0.3%, with air balance volume fraction to 100%; The MAG block of packing into subsequently is warming up to 720 ℃, treat that the Mg piece all is warming up to 750 ℃ after the fusing, add Zn piece and Mg-RE master alloy piece successively, be warming up to 780 ℃ again after, stirred 1 minute, leave standstill 30min at 780 ℃, stop, treating that furnace temperature is cooled to 720 ℃ the stove heat supply, the alloy pushing off the slag is cast in the cast iron mould that is preheated to 300 ℃ in advance, the mould air cooling is to room temperature, and the alloy depanning obtains the binary reinforcement damping magnesium alloy of balance optimizing.
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| JP3693583B2 (en) * | 2001-03-05 | 2005-09-07 | 独立行政法人科学技術振興機構 | High strength and high ductility Mg-based alloy |
| CN100336925C (en) * | 2005-11-17 | 2007-09-12 | 上海交通大学 | Method for preparing high-damping Mg2Si/Mg-9Al-Y composite material |
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| CN106222507A (en) * | 2016-09-06 | 2016-12-14 | 重庆大学 | A kind of low cost high-damping high intensity Mg Zn Ce alloy and preparation method thereof |
| CN106222507B (en) * | 2016-09-06 | 2018-05-01 | 重庆大学 | A kind of low cost high-damping high intensity Mg-Zn-Ce alloys and preparation method thereof |
| CN113981288A (en) * | 2021-10-29 | 2022-01-28 | 中国科学院长春应用化学研究所 | Die-casting magnesium alloy and preparation method thereof |
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