CN109112375B - Preparation method of high-performance alkene magnesium alloy - Google Patents

Preparation method of high-performance alkene magnesium alloy Download PDF

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CN109112375B
CN109112375B CN201811174500.1A CN201811174500A CN109112375B CN 109112375 B CN109112375 B CN 109112375B CN 201811174500 A CN201811174500 A CN 201811174500A CN 109112375 B CN109112375 B CN 109112375B
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CN109112375A (en
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李翔光
于丹
敖四海
邵军
黄斌
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Guizhou Aerospace Fenghua Precision Equipment Co Ltd
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1005—Pretreatment of the non-metallic additives
    • C22C1/101—Pretreatment of the non-metallic additives by coating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent

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Abstract

The invention belongs to the technical field of alloy materials, and particularly relates to a preparation method of a high-performance alkene magnesium alloy, which comprises the following steps: (1) adding the modified graphene powder into a solution of an organic silicon surfactant, soaking and drying to obtain mixed graphene powder; (2) smelting magnesium powder and alloy element powder under inert gas to obtain molten metal; (3) adding the mixed graphene powder into the molten metal, performing ultrasonic and stirring treatment to obtain molten alloy, and performing deslagging and pouring to obtain an alloy ingot; (4) and carrying out heat treatment on the alloy ingot to obtain the alkene-magnesium alloy. The modified graphene powder is prepared by modifying graphene by using zirconium, hydrofluoric acid and nitrogen. The preparation method of the high-performance graphene-magnesium nuclear alloy provided by the invention solves the problems of low dispersity and easy agglomeration of graphene, realizes the tight combination of graphene and other elements, and has high homogenization degree and excellent performances in all aspects.

Description

Preparation method of high-performance alkene magnesium alloy
Technical Field
The invention belongs to the technical field of alloy material preparation, and particularly relates to a preparation method of a high-performance alkene magnesium alloy.
Background
The magnesium alloy is an alloy formed by adding other elements into magnesium as a matrix, is the lightest metal engineering structural material in practical application, has the advantages of small density, high specific strength, high specific stiffness, strong electromagnetic shielding capability, good vibration damping performance, no pollution and the like, is a green and environment-friendly engineering material, and gradually receives wide attention of people. In recent years, because of the remarkable effects of magnesium alloy in the aspects of realizing light weight, reducing energy consumption, reducing environmental pollution and the like, the magnesium alloy is increasingly widely applied in the industrial fields of automobiles, national defense and military industry, aerospace, electronics, machinery and the like, and the fields of household articles, sports equipment and the like, and has very considerable market prospect; however, the magnesium alloys currently on the market still have significant disadvantages: 1. the absolute strength is still low, the high-temperature mechanical property is poor, and the strength and the creep resistance are greatly reduced in a high-temperature state; 2. low room temperature plasticity and poor deformation processing capability; 3. the chemical activity is high, the oxidation and combustion are easy, and the processing, smelting and processing are difficult; 4. the corrosion resistance is poor. Graphene is a polymer made of carbon atoms in sp2The hybrid orbit forms a hexagonal honeycomb lattice IIThe vitamin-carbon nano material has excellent optical, electrical and mechanical properties, so that the graphene-like substance is also frequently added in the preparation process of the magnesium alloy to improve the properties of the magnesium alloy. According to the patent application No. CN201610850376.0, disclosed is a high-performance magnesium-olefin alloy material and a preparation method thereof, which comprises, by mass, 5-8% of graphene, 1-2% of Co, 1-2% of Y, 4-7% of Al, 1-3% of Mn, 0.2-0.8% of Li, 0.2-1.0% of Zr, 0.1-0.5% of Ca, 0.1-0.5% of Zn, 0.2-1.0% of Cd, 0.3-0.7% of Yb, 0.3-0.7% of Ni, 0.1-1% of Sb, 0.1-1% of Mo and the balance of Mg as raw materials, pure magnesium metal is preheated, and is smelted with other raw materials containing metal elements under the protection of inert gas, and heat is preserved after smelting; heating after heat preservation, adding graphene material, stirring uniformly, standing, filtering to obtain crude magnesium alloy liquid, refining, surface treatment, cold pressing, sintering and forming to obtain the olefinic magnesium alloy material, wherein the properties such as heat resistance, strength and hardness are superior to those of the traditional magnesium alloy material; however, graphene has the characteristics of strong thermal stability, low density, low dispersibility, easy agglomeration and the like, the content of graphene substances in an alloy material is low, and most excellent performances of graphene cannot be fully utilized due to the agglomeration.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a preparation method of a high-performance alkene magnesium alloy, which is realized by the following technical scheme:
a preparation method of a high-performance alkene magnesium alloy comprises the following steps:
(1) mixing a surfactant and deionized water to prepare a solution, adding the modified graphene powder, uniformly mixing, standing for 10-15h, and drying in a freeze dryer to obtain mixed graphene powder for later use;
(2) smelting magnesium powder and alloy element powder under the protection of argon to obtain molten metal, and preserving heat after smelting;
(3) after heat preservation, controlling the temperature to be between 160 and 180 ℃, adding the mixed graphene powder obtained in the step (1) into the molten metal, stirring and mixing uniformly, carrying out ultrasonic treatment for 40-50min, stirring for 1-2h to obtain molten alloy, heating to 700 and 800 ℃ for deslagging treatment, cooling the molten alloy to 650 and 680 ℃, adding the molten alloy into a preheated steel mold, and pouring to obtain an alloy ingot;
(4) heating the alloy ingot to 500-600 ℃, keeping the temperature for 6-7h, naturally cooling to room temperature, heating to 200-300 ℃, keeping the temperature for 10-15h, and cooling to obtain the magnesium-olefin alloy.
Preferably, the modified graphene powder is prepared by: dissolving zirconium powder in 40% hydrofluoric acid solution, adding graphene powder, mixing to obtain mixed slurry, and introducing 20-30% N into the mixed slurry2Carrying out ultrasonic treatment for 30-40min, filtering and drying to obtain modified graphite powder; wherein the power of the ultrasonic wave is 0.8-1.2 kW.
Preferably, the ratio of the zirconium powder, the graphene powder and the hydrofluoric acid solution is 0.5-1: 1:60-70(g: g: ml)
Preferably, the surfactant is a silicone surfactant.
Preferably, in the step (1), the ratio of the surfactant to the deionized water to the modified graphene powder is 1-2:50-60:1(g: ml: g).
Preferably, in the step (3), the power of the ultrasonic wave is 20-25kW, and the stirring speed is 700-800 rpm.
Preferably, the smelting temperature is 860-900 ℃.
Preferably, the alkene-magnesium alloy is prepared from 5.6-7.8% of mixed graphene powder, 12.5-16.2% of alloying element powder and 76.0-81.9% of magnesium powder in percentage by mass.
Preferably, the alloy element powder consists of 1.5 to 2.4 parts of Zn, 4.6 to 5 parts of Al, 0.2 to 0.3 part of Mo, 1.4 to 2 parts of Ti, 3 to 3.6 parts of Si, 0.5 to 1 part of Zr, 1.2 to 1.7 parts of Cu and 0.1 to 0.2 part of Y in parts by weight.
Preferably, the density of the alkene magnesium alloy is 1.46-1.47g/cm3The yield strength reaches more than 440MPa, the tensile strength reaches more than 354MPa, the hardness is 130-140HV, and the temperature resistance is 820-850 ℃.
The invention has the beneficial effects that: graphene prepared by using zirconium powder and hydrofluoric acidThe powder is improved, so that the agglomeration of graphene powder can be prevented, and the impurity content in the magnesium alloy can be reduced; n introduced in graphene powder modification process2The zirconium powder can be fully fused with the graphene under the action of the zirconium powder, the surface activity of the graphene is reduced, the agglomeration of the graphene powder is further prevented, and N is added2The use of the alloy also increases the nitrogen content in the magnesium alloy, thereby enhancing the hardness, thermal stability and corrosion resistance of the magnesium alloy. The organic silicon surfactant has excellent performance of reducing surface tension and higher heat-resistant stability, and can improve the dispersibility of the modified graphene in molten metal, so that the obtained graphene-magnesium alloy is more homogeneous. The alloy ingot is treated at high temperature (500-600 ℃) and then at low temperature (200-300 ℃), so that atoms in the alloy ingot can be fully diffused, components in the magnesium-olefin alloy can be more uniformly dispersed, residual stress can be removed, and grains can be refined. The preparation method of the graphene-magnesium alloy provided by the invention solves the problems that graphene powder is easy to agglomerate and disperse, realizes the tight combination of graphene and other metal elements, and prepares the graphene-magnesium alloy with excellent performances in all aspects.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
Example 1
Preparing modified graphene powder: dissolving zirconium powder in 40% hydrofluoric acid solution, adding graphene powder, mixing uniformly to obtain mixed slurry, and introducing 20% N into the mixed slurry2Carrying out ultrasonic treatment for 30min, filtering and drying to obtain modified graphite powder; wherein, the power of ultrasonic wave is 1.2kW, and the proportion of zirconium powder, graphite alkene powder, hydrofluoric acid solution is 0.5: 1:60(g: g: ml).
Preparing a high-performance alkene magnesium alloy:
(1) mixing an organic silicon surfactant and deionized water to prepare a solution, adding modified graphene powder, uniformly mixing, standing for 10 hours, and drying in a freeze dryer to obtain mixed graphene powder for later use; wherein the ratio of the organic surfactant to the deionized water to the modified graphene powder is 1:50:1(g: ml: g);
(2) smelting magnesium powder and alloy element powder under the protection of argon to obtain molten metal, wherein the smelting temperature is 860-doped 900 ℃, and the temperature is maintained for 1h at 900 ℃ after smelting;
(3) after heat preservation, controlling the temperature between 160 and 180 ℃, adding the mixed graphene powder obtained in the step (1) into the metal liquid, stirring and mixing uniformly, carrying out ultrasonic treatment for 40min, stirring for 1h to obtain molten alloy, heating to 700 and 800 ℃ for deslagging treatment, then adding the molten alloy into a preheated steel mould for pouring when the temperature of the molten alloy is reduced to 650 and 680 ℃ to obtain an alloy ingot; wherein the power of the ultrasound is 25kW, and the stirring speed is 700 rpm;
(4) heating the alloy ingot to 500-DEG C and keeping the temperature for 6h, naturally cooling the alloy ingot to room temperature, heating the alloy ingot to 200-DEG C and keeping the temperature for 10h, and cooling the alloy ingot to obtain the alkene-magnesium alloy.
The graphene-magnesium alloy is prepared from 5.6% of mixed graphene powder, 12.5% of alloy element powder and 81.9% of magnesium powder in percentage by mass.
The alloy element powder comprises, by weight, 1.5 parts of Zn, 4.6 parts of Al, 0.2 part of Mo, 1.4 parts of Ti, 3 parts of Si, 0.5 part of Zr, 1.2 parts of Cu and 0.1 part of Y.
Example 2
Preparing modified graphene powder: dissolving zirconium powder in 40% hydrofluoric acid solution, adding graphene powder, mixing uniformly to obtain mixed slurry, and introducing 25% N into the mixed slurry2Carrying out ultrasonic treatment for 34in, filtering and drying to obtain modified graphite powder; wherein, the power of ultrasonic wave is 1.0kW, and the proportion of zirconium powder, graphite alkene powder, hydrofluoric acid solution is: 0.8: 1:65(g: g: ml).
Preparing a high-performance alkene magnesium alloy:
(1) mixing an organic silicon surfactant and deionized water to prepare a solution, adding modified graphene powder, uniformly mixing, standing for 12 hours, and drying in a freeze dryer to obtain mixed graphene powder for later use; wherein the ratio of the organic silicon surfactant to the deionized water to the modified graphene powder is 1.2:56:1(g: ml: g).
(2) Smelting magnesium powder and alloy element powder under the protection of argon to obtain molten metal, wherein the smelting temperature is 860-doped 900 ℃, and the temperature is maintained for 1h at 900 ℃ after smelting;
(3) after heat preservation, controlling the temperature to be between 160 and 180 ℃, adding the mixed graphene powder obtained in the step (1) into the metal liquid, stirring and mixing uniformly, carrying out ultrasonic treatment for 46min, stirring for 1-2h to obtain molten alloy, heating to 700 and 800 ℃ for deslagging treatment, cooling the molten alloy to 650 and 680 ℃, adding the molten alloy into a preheated steel mold, and pouring to obtain an alloy ingot; wherein the power of the ultrasound is 24kW, and the stirring speed is 750 rpm;
(4) heating the alloy ingot to 500-DEG C and keeping the temperature for 6h, naturally cooling the alloy ingot to room temperature, heating the alloy ingot to 200-DEG C and keeping the temperature for 12h, and cooling the alloy ingot to obtain the alkene-magnesium alloy.
The graphene-magnesium alloy is prepared from 7.0% of mixed graphene powder, 15.0% of alloy element powder and 78.0% of magnesium powder in percentage by mass.
The alloy element powder comprises, by weight, 2.2 parts of Zn, 5 parts of Al, 0.3 part of Mo, 1.8 parts of Ti, 3.5 parts of Si, 0.5 part of Zr, 1.5 parts of Cu and 0.2 part of Y.
Example 3
The preparation of the modified graphene powder comprises the following steps: dissolving zirconium powder in 40% hydrofluoric acid solution, adding graphene powder, mixing uniformly to obtain mixed slurry, and introducing 30% N into the mixed slurry2Carrying out ultrasonic treatment for 40min, filtering and drying to obtain modified graphite powder; wherein, the power of ultrasonic wave is 0.8kW, and the proportion of zirconium powder, graphite alkene powder, hydrofluoric acid solution is: 1: 1:70(g: g: ml).
Preparing a high-performance alkene magnesium alloy:
(1) mixing an organic silicon surfactant and deionized water to prepare a solution, adding modified graphene powder, uniformly mixing, standing for 15 hours, and drying in a freeze dryer to obtain mixed graphene powder for later use; wherein the ratio of the organic silicon surfactant to the deionized water to the modified graphene powder is 2:60:1(g: ml: g).
(2) Smelting magnesium powder and alloy element powder under the protection of argon to obtain molten metal, wherein the smelting temperature is 860-doped 900 ℃, and the temperature is kept at 900 ℃ for 2h after smelting;
(3) after heat preservation, controlling the temperature between 160 and 180 ℃, adding the mixed graphene powder obtained in the step (1) into the metal liquid, stirring and mixing uniformly, carrying out ultrasonic treatment for 50min, stirring for 2h to obtain molten alloy, heating to 700 and 800 ℃ for deslagging treatment, then adding the molten alloy into a preheated steel mould for pouring when the temperature of the molten alloy is reduced to 650 and 680 ℃ to obtain an alloy ingot; wherein the power of the ultrasound is 20kW, and the stirring speed is 800 rpm;
(4) heating the alloy ingot to 500-DEG C and keeping the temperature for 7h, naturally cooling the alloy ingot to room temperature, heating the alloy ingot to 200-DEG C and keeping the temperature for 15h, and cooling the alloy ingot to obtain the alkene-magnesium alloy.
Preferably, the alkene-magnesium alloy is prepared from 7.8% of mixed graphene powder, 16.2% of alloying element powder and 76.0% of magnesium powder in percentage by mass.
Preferably, the alloying element powder consists of 2.4 parts of Zn, 5 parts of Al, 0.3 part of Mo, 2 parts of Ti, 3.6 parts of Si, 1 part of Zr, 1.7 parts of Cu and 0.2 part of Y in parts by weight.
Comparative example 1
The comparative example 1 is different from the example 1 in that the graphene powder is not modified, and the other processes are the same.
Comparative example 2
Comparative example 2 is different from example 1 in that the modified graphene powder was not treated with the silicone surfactant, and the other processes were the same.
Comparative example 3
Comparative example 3 is different from example 1 in that graphene powder is not modified and is not treated with a silicone surfactant, but is directly added to a molten alloy, and other processes are the same.
Comparative example 4
The difference between the comparative example 4 and the example 1 is that the magnesium alloy is directly prepared from the molten alloy subjected to deslagging treatment in the step (3) through cold pressing and sintering forming.
Control group
The patent with the application number of 201610850376.0 discloses a high-performance magnesium-olefin alloy material and a preparation method thereof:
the olefinic magnesium alloy material comprises the following components: by mass percentage, 7.5% of graphene oxide, 1.8% of Co1, 1.8% of Y, 6% of Al, 2.5% of Mn, 0.7% of Li, 0.3% of Zr, 0.2% of Ca, 0.5% of Zn0.3% of Cd, 0.6% of Yb, 0.6% of Ni0.6%, 0.8% of Sb, 0.2% of Mo, 0.001% of Be, 0.003% of Cu0.003%, 0.003% of Fe, 0.003% of Cr, and the balance of Mg;
the preparation method of the olefinic magnesium alloy material comprises the following steps:
(1) grinding and polishing the surface of the pure magnesium metal ingot by using sand paper or a polishing machine, washing the pure magnesium metal ingot by using water for 2 to 3 minutes, soaking the pure magnesium metal ingot in a sodium hydroxide solution for 20 to 30 minutes to remove oil, washing the pure magnesium metal ingot by using water for 2 to 3 minutes, soaking the pure magnesium metal ingot in an absolute ethyl alcohol solution for ultrasonic treatment for 0.5 hour, wherein the ultrasonic power is 1500w, and taking out the pure magnesium metal ingot to be naturally dried for later use;
(2) preheating a pure magnesium metal ingot at 210 ℃, adding metal powder corresponding to other metal elements after preheating, smelting in a smelting furnace under the condition of nitrogen protection, controlling the smelting temperature to be 920 ℃, and preserving heat at 965 ℃ for 20-30min after smelting for 2-3 h;
(3) dissolving biomass graphene in water to prepare a biomass graphene aqueous solution with the mass percentage concentration of 4.5 wt%, controlling the temperature at 170 ℃, adding the biomass graphene aqueous solution, performing ultrasonic dispersion for 2 hours at 1000w, mechanically stirring for 2 hours at 500rpm, standing, and filtering to obtain a crude magnesium alloy solution;
(4) transferring the crude magnesium alloy liquid into a refining furnace with constant temperature of 600-: 1, cold pressing for 25min in an extruder, and finally sintering and forming at 360 ℃ to obtain the final product of the olefinic magnesium alloy material.
Experimental example 1
Taking the olefinic magnesium alloy prepared in the examples 1-3 and the comparative examples 1-4, and the comparison group, the performance indexes such as density, hardness, strength and the like are detected, and the results are shown in the table 1:
TABLE 1 Performance index
Figure BDA0001823364570000081
It can be seen from the table that, compared with comparative examples 1 to 3, examples 1 to 3 have no significant difference in yield strength and tensile strength, but have higher temperature resistance, hardness and density than comparative examples 1 to 3, which indicates that the magnesium-olefin alloy prepared in examples 1 to 3 has better high-temperature stability and mechanical properties, but is not as light as the magnesium-olefin alloy prepared in comparative examples 1 to 3, so that the properties of the magnesium-olefin alloy can be improved by modifying graphene and treating modified graphene with an organic silicon surfactant in consideration of yield strength, tensile strength, hardness, temperature resistance and density; the yield strength, the tensile strength and the hardness of the examples 1 to 3 are not obviously different from those of the comparative example 4, but the temperature resistance is higher than that of the comparative example 4, and the density is lower than that of the comparative example 4, so that the heat treatment process provided by the invention can enhance the component homogenization degree of the magnesium-olefin alloy, and the magnesium-olefin alloy has better stability and lighter weight at high temperature; the yield strength, the tensile strength and the hardness of the examples 1-3 are not obviously different from those of the control group, but the temperature resistance is higher than that of the control group, and the density is lower than that of the control group, so that the performance of the obtained magnesium-olefin alloy is better.
It should be noted that the above examples and test examples are only for further illustration and understanding of the technical solutions of the present invention, and are not to be construed as further limitations of the technical solutions of the present invention, and the invention which does not highlight essential features and significant advances made by those skilled in the art still belongs to the protection scope of the present invention.

Claims (9)

1. The preparation method of the high-performance alkene magnesium alloy is characterized by comprising the following steps of:
(1) mixing a surfactant and deionized water to prepare a solution, adding the modified graphene powder, uniformly mixing, standing for 10-15h, and drying in a freeze dryer to obtain mixed graphene powder for later use;
(2) smelting magnesium powder and alloy element powder under the protection of argon to obtain molten metal, and preserving heat after smelting;
(3) after heat preservation, controlling the temperature to be between 160 and 180 ℃, adding the mixed graphene powder obtained in the step (1) into the molten metal, stirring and mixing uniformly, carrying out ultrasonic treatment for 40-50min, stirring for 1-2h to obtain molten alloy, heating to 700 and 800 ℃ for deslagging treatment, cooling the molten alloy to 650 and 680 ℃, adding the molten alloy into a preheated steel mold, and pouring to obtain an alloy ingot;
(4) heating the alloy ingot to 500-600 ℃, keeping the temperature for 6-7h, naturally cooling to room temperature, heating to 200-300 ℃, keeping the temperature for 10-15h, and cooling to obtain the magnesium-olefin alloy;
the preparation method of the modified graphene powder comprises the following steps: dissolving zirconium powder in 40% hydrofluoric acid solution, adding graphene powder, mixing to obtain mixed slurry, and introducing 20-30% N into the mixed slurry2Carrying out ultrasonic treatment for 30-40min, filtering and drying to obtain modified graphene powder; wherein the power of the ultrasonic wave is 0.8-1.2 kW.
2. The method for preparing the high-performance alkenyl magnesium alloy according to claim 1, wherein the ratio of the zirconium powder to the graphene powder to the hydrofluoric acid solution is (0.5-1) g to 1g (60-70) ml.
3. The method for preparing the high-performance alkenyl magnesium alloy according to claim 1, wherein the surfactant is an organosilicon surfactant.
4. The preparation method of the high-performance graphene-magnesium alloy according to claim 1, wherein in the step (1), the proportion of the surfactant, the deionized water and the modified graphene powder is (1-2) g (50-60) ml:1 g.
5. The method for preparing the high-performance magnesium-olefin alloy as claimed in claim 1, wherein in the step (3), the ultrasonic power is 20-25kW, and the stirring speed is 700-800 rpm.
6. The method for preparing the high-performance magnesium-olefin alloy as claimed in claim 1, wherein the melting temperature is 860 ℃ and 900 ℃.
7. The preparation method of the high-performance alkenyl magnesium alloy according to claim 1, wherein the alkenyl magnesium alloy is prepared from 5.6-7.8% of mixed graphene powder, 12.5-16.2% of alloying element powder and 76.0-81.9% of magnesium powder in percentage by mass.
8. The method of claim 7, wherein the alloying element powder comprises, in parts by weight, 1.5 to 2.4 parts of Zn, 4.6 to 5 parts of Al, 0.2 to 0.3 part of Mo, 1.4 to 2 parts of Ti, 3 to 3.6 parts of Si, 0.5 to 1 part of Zr, 1.2 to 1.7 parts of Cu, and 0.1 to 0.2 part of Y.
9. The method for preparing the high-performance magnesium-olefin alloy according to claim 1, wherein the density of the magnesium-olefin alloy is 1.46-1.47g/cm3The yield strength reaches more than 440MPa, the tensile strength reaches more than 354MPa, the hardness is 130-140HV, and the temperature resistance is 820-850 ℃.
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