CN115233010A - Method for efficiently preparing high-strength magnesium alloy - Google Patents
Method for efficiently preparing high-strength magnesium alloy Download PDFInfo
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- CN115233010A CN115233010A CN202210729367.1A CN202210729367A CN115233010A CN 115233010 A CN115233010 A CN 115233010A CN 202210729367 A CN202210729367 A CN 202210729367A CN 115233010 A CN115233010 A CN 115233010A
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C23/00—Alloys based on magnesium
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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Abstract
The invention discloses a method for efficiently preparing a high-strength magnesium alloy, which comprises the following steps: a) The following raw materials were obtained: preparing a pure magnesium ingot, a magnesium-gadolinium intermediate alloy, a magnesium-yttrium intermediate alloy, pure zinc particles and a magnesium-zirconium intermediate alloy; b) Preparing an alloy melt from the pure magnesium ingot, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy, the pure zinc particles and the magnesium-zirconium intermediate alloy obtained in the step A); c) Carrying out centrifugal casting on the alloy melt prepared in the step B) to obtain an alloy ingot; d) Carrying out homogenization heat treatment and extrusion molding on the alloy ingot in the step C) to obtain an extruded bar of the magnesium alloy; the extrusion molding conditions are as follows: the extrusion ratio is 16-25, the extrusion speed is 8-10mm/s, and the extrusion temperature is 420-460 ℃; e) Carrying out aging treatment on the extruded bar in the step D). The magnesium alloy prepared by the method provided by the invention can effectively solve the problem that the extrudability, the extrusion efficiency and the strength of the existing magnesium alloy are difficult to be improved in a synergistic manner.
Description
Technical Field
The invention belongs to the technical field of metal materials, and particularly relates to a method for efficiently preparing a high-strength magnesium alloy.
Background
Magnesium alloys have gained widespread attention due to the significantly increasing demand for lightweight structural materials. The Mg-RE-Zn series alloy is a high-strength magnesium alloy containing a long-period stacking ordered structure (LPSO phase), and the series alloy is not only strengthened and toughened through the LPSO phase, but also has excellent aging strengthening effect. After aging treatment, the tensile strength of the variable-form Mg-RE-Zn alloy can reach more than 500MPa, so that the alloy has wide application prospects in the aerospace industry, the national defense war industry and the transportation industry.
Under the gravity casting condition, the microstructure of the Mg-RE-Zn alloy is coarse and uneven in chemical composition, and a second phase presents a coarse reticular structure, so that the extrudability of the alloy is deteriorated, and the alloy is difficult to extrude at a high extrusion speed; too high an extrusion speed tends to result in a decrease in the tensile strength of the extruded alloy and the appearance of cracks; meanwhile, in order to obtain high strength extruded magnesium alloys, low extrusion speeds (typically 0.5-2 mm/s) are commonly used in many documents. For example, xu Chaodeng people produced high strength Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr magnesium alloy rods with a UTS of 442MPa by extrusion, however, the extrusion speed was only 0.1mm/s. Centrifugal casting is one of the most direct and effective special casting methods for improving the mechanical properties of metal materials, and is widely applied in actual production. The centrifugal force field, the fluid field and the periodic vibration generated by centrifugal casting greatly influence the solidification mode of the magnesium alloy, and the effective regulation and control of the microstructure and the second phase of the casting can be realized, so that the casting with high metallurgical cleanliness and uniform microstructure is prepared. The centrifugal casting is adopted to be beneficial to improving the extrudability of the alloy, so that the high-strength rare earth magnesium alloy is prepared at a high extrusion speed. Provides theoretical and technical basis for preparing the high-strength magnesium alloy extruded section by adopting a centrifugal casting ring piece-hot extrusion-aging composite process.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention mainly aims to provide a method for efficiently preparing a high-strength magnesium alloy, and aims to solve the problem that the extrudability, the extrusion efficiency and the strength of the conventional magnesium alloy are difficult to be synergistically improved.
The purpose of the invention is realized by the following technical scheme:
a method for efficiently preparing a high-strength magnesium alloy comprises the following steps:
a) The following raw materials were obtained: preparing a pure magnesium ingot, a magnesium-gadolinium intermediate alloy, a magnesium-yttrium intermediate alloy, pure zinc particles and a magnesium-zirconium intermediate alloy;
b) Preparing an alloy melt from the pure magnesium ingot, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy, the pure zinc particles and the magnesium-zirconium intermediate alloy obtained in the step A);
c) Carrying out centrifugal casting on the alloy melt prepared in the step B) to obtain an alloy ingot;
d) Carrying out homogenization heat treatment and extrusion molding on the alloy ingot in the step C) to obtain an extruded bar of the magnesium alloy; the extrusion forming conditions are as follows: the extrusion ratio is 16-25, the extrusion speed is 8-10mm/s, and the extrusion temperature is 420-460 ℃;
e) Carrying out aging treatment on the extruded bar in the step D).
In certain embodiments, the extrusion speed is 8mm and the extrusion temperature is 450 ℃.
In certain embodiments, said step D) is specifically: removing the surface oxide layer of the cast ingot obtained in the step C), placing the cast ingot in a muffle furnace for homogenization heat treatment, then carrying out extrusion molding on the cast ingot subjected to the homogenization heat treatment in an extruder, and cooling to room temperature to obtain an extruded bar.
In certain embodiments, the chemical elemental composition of the raw material comprises, in mass fractions: 8.0 to 8.5 percent of Gd, 3.5 to 4.0 percent of Y, 1.0 to 1.5 percent of Zn, 0.4 to 0.6 percent of Zr, and the balance of magnesium and inevitable impurities, wherein the total content of the impurities is less than or equal to 0.3 percent.
In certain embodiments, said step C) is specifically: keeping the alloy melt obtained in the step B) at the temperature of 700-720 ℃ for 3-6 minutes, pouring the alloy melt into a centrifugal casting mold, naturally cooling, and performing wire cutting processing to obtain an ingot with the diameter of phi 80.
In certain embodiments, the temperature of the homogenizing heat treatment is 500-520 ℃ and the time of the homogenizing heat treatment is 12-15 hours; the temperature of the aging treatment is 180-220 ℃, and the time of the aging treatment is 40-55 hours.
Compared with the prior art, the invention has at least the following advantages:
1) According to the method for efficiently preparing the high-strength magnesium alloy, the zinc (Zn) element and the zirconium (Zr) element are added into the Mg-Gd-Y alloy system, so that crystal grains can be refined, meanwhile, a long-period stacking ordered phase can be formed, the movement of dislocation is hindered, and the magnesium alloy can be remarkably strengthened;
2) The method for efficiently preparing the high-strength magnesium alloy provided by the invention can prepare the high-strength and high-toughness extruded Mg-Gd-Y-Zn-Zr alloy under high-speed extrusion through a centrifugal casting-extrusion efficient composite process, greatly improves the production efficiency of the high-strength and high-toughness magnesium alloy, and has the production efficiency 4-20 times that of the common high-strength magnesium alloy.
3) According to the method, a centrifugal Mg-Gd-Y-Zn-Zr alloy is directly extruded by adopting a centrifugal casting-extrusion-aging composite process, and lamellar LPSO phases are arranged in parallel to the extrusion direction after being extruded, so that a short fiber strengthening effect similar to that of a composite material is generated; the layered/rod-shaped LPSO phase can effectively prevent dislocation slippage, twin crystal growth and microcrack formation; the thinning of crystal grains caused by extrusion can obviously shorten the dislocation sliding distance and relieve the stress concentration caused by excessive dislocation plug set, thereby improving the plasticity; the existence of the nano-scale aging precipitation phase can greatly improve the strength of the alloy; the yield strength of the high-strength magnesium alloy is 437MPa, the tensile strength is 516MPa, and the elongation is 6.5%.
Drawings
In order to more clearly illustrate the embodiments of the present invention, reference will now be made briefly to the embodiments or to the accompanying drawings that are needed in the description of the prior art.
FIG. 1 is a metallographic structure diagram of a high-strength magnesium alloy prepared by the method of example 2;
FIG. 2 is an SEM image of a high strength magnesium alloy prepared by the method of example 2;
FIG. 3 is a TEM image of a high-strength magnesium alloy prepared by the method of example 2;
fig. 4 is a stress-strain curve of the high strength magnesium alloy prepared by the method of example 2.
Detailed Description
The present invention will be further described with reference to the following drawings and examples, which are illustrative only and not intended to be limiting, and the scope of the present invention is not limited thereby. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or upper and lower limit of the preferred value, it is to be understood that any range where any pair of upper limit or preferred value and any lower limit or preferred value of the range is combined is specifically disclosed, regardless of whether the range is specifically disclosed. Unless otherwise indicated, numerical range values set forth herein are intended to include the endpoints of the range, and all integers and fractions within the range.
The pure magnesium ingot, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy, the pure zinc particles and the magnesium-zirconium intermediate alloy adopted in the embodiment of the invention are commercially available products.
The model of a metallographic microscope adopted in the embodiment of the invention is OLYMPUS PMG3;
the type of a scanning electron microscope adopted in the embodiment of the invention is JSM-7800F;
in the embodiment of the invention, the purity of the magnesium ingot is more than or equal to 99.95 percent, and the purity of the pure zinc particles is more than or equal to 99.99 percent;
in the embodiment of the invention, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy and the magnesium-zirconium intermediate alloy are collectively called magnesium intermediate alloy, and the gadolinium, yttrium and zirconium in the magnesium intermediate alloy respectively account for 20-30% of the total mass of the magnesium intermediate alloy;
example 1 preparation of high Strength magnesium alloy
Embodiment mode 1
The high-strength magnesium alloy provided by the invention comprises the following components in percentage by mass:
8.0 percent of Gd, 3.5 percent of Y, 1.5 percent of Zn and 0.6 percent of Zr, and the balance of magnesium and inevitable impurities, wherein the total content of the impurities is less than or equal to 0.3 percent.
The rotary swaging preparation method of the light high-strength magnesium alloy comprises the following steps:
1) Preparing materials: preparing a pure magnesium ingot, a magnesium-gadolinium intermediate alloy, a magnesium-yttrium intermediate alloy, pure zinc particles and a magnesium-zirconium intermediate alloy;
2) Under the protection of argon, putting the prepared pure magnesium ingot, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy, the pure zinc particles and the magnesium-zirconium intermediate alloy into a crucible according to the mass fraction, heating the crucible along with a melting furnace to 700 ℃ until all materials are completely melted.
3) Maintaining the alloy melt obtained in the step 2) at the temperature of 700 ℃ for 6 minutes, pouring the alloy melt into a centrifugal casting mold, naturally cooling the alloy melt, and performing wire cutting processing to obtain an ingot with the diameter phi of 80;
4) Removing the surface oxide layer of the cast ingot obtained in the step 3), placing the cast ingot in a muffle furnace, carrying out homogenization heat treatment at the temperature of 520 ℃ for 12 hours, and extruding the blank subjected to the homogenization heat treatment into a bar with the diameter of phi 16 at the extrusion ratio of 16, the extrusion temperature of 420 ℃ and the extrusion speed of 10 mm/s;
5) And (3) placing the bar obtained in the step 4) into a muffle furnace, and carrying out aging heat treatment for 40 hours at the temperature of 220 ℃.
In this embodiment, the performance of the magnesium alloy rod prepared in step 5) is tested, and the result is: the yield strength is 419MPa, the tensile strength is 501MPa, and the elongation is 6.9%.
The high-strength magnesium alloy provided by the invention comprises the following components in percentage by mass:
8.5 percent of Gd, 4.0 percent of Y, 1.0 percent of Zn, 0.4 percent of Zr, and the balance of magnesium and inevitable impurities, wherein the total content of the impurities is less than or equal to 0.3 percent.
The rotary swaging preparation method of the light high-strength magnesium alloy comprises the following steps:
1) Preparing materials: preparing a pure magnesium ingot, a magnesium-gadolinium intermediate alloy, a magnesium-yttrium intermediate alloy, pure zinc particles and a magnesium-zirconium intermediate alloy;
2) Under the protection of argon, putting the prepared pure magnesium ingot, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy, the pure zinc particles and the magnesium-zirconium intermediate alloy into a crucible according to the mass fraction, heating the crucible along with a melting furnace to 710 ℃ until all materials are completely melted.
3) Maintaining the alloy melt obtained in the step 2) at the temperature of 710 ℃ for 5 minutes, pouring the alloy melt into a centrifugal casting mold, naturally cooling the alloy melt, and performing wire cutting processing to obtain an ingot with the diameter phi of 80.
4) Removing a surface oxide layer from the cast ingot obtained in the step 3), placing the cast ingot in a muffle furnace, carrying out homogenization heat treatment for 15 hours at the temperature of 500 ℃, and then extruding the blank subjected to the homogenization heat treatment into a bar with the diameter of phi 16 at the extrusion ratio of 25, the extrusion temperature of 450 ℃ and the extrusion speed of 8 mm/s;
5) And (3) placing the bar obtained in the step 4) into a muffle furnace, and carrying out aging heat treatment for 55 hours at the temperature of 180 ℃.
In this example, the performance of the magnesium alloy rod prepared in the step 5) is tested, and the result is shown in fig. 4: the yield strength is 437MPa, the tensile strength is 516MPa, and the elongation is 6.5%.
Embodiment 3
The high-strength magnesium alloy provided by the invention comprises the following components in percentage by mass:
8.3 percent of Gd, 3.6 percent of Y, 1.3 percent of Zn and 0.5 percent of Zr, and the balance of magnesium and inevitable impurities, wherein the total content of the impurities is less than or equal to 0.3 percent.
The rotary swaging preparation method of the light high-strength magnesium alloy comprises the following steps:
1) Preparing materials: preparing a pure magnesium ingot, a magnesium-gadolinium intermediate alloy, a magnesium-yttrium intermediate alloy, pure zinc particles and a magnesium-zirconium intermediate alloy;
2) Under the protection of argon, putting the prepared pure magnesium ingot, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy, the pure zinc particles and the magnesium-zirconium intermediate alloy into a crucible according to the mass fraction ratio, heating the crucible along with a melting furnace to 720 ℃ until all materials are completely melted.
3) Maintaining the alloy melt obtained in the step 2) at the temperature of 720 ℃ for 3 minutes, pouring the alloy melt into a centrifugal casting mold, naturally cooling the alloy melt, and performing wire cutting processing to obtain an ingot with the diameter phi of 80.
4) Removing the surface oxide layer of the cast ingot obtained in the step 3), placing the cast ingot in a muffle furnace, carrying out homogenization heat treatment at 510 ℃ for 13 hours, and extruding the blank subjected to the homogenization heat treatment into a bar with the diameter phi 16 at the extrusion ratio of 20, the extrusion temperature of 450 ℃ and the extrusion speed of 9 mm/s;
5) And (3) placing the bar obtained in the step 4) into a muffle furnace, and carrying out aging heat treatment for 48 hours at the temperature of 200 ℃.
In this embodiment, the performance of the magnesium alloy rod prepared in step 5) is tested, and the result is: the yield strength is 426MPa, the tensile strength is 505MPa, and the elongation is 6.7%.
Comparative example 1
This comparative example relates to a high-strength magnesium alloy having the same composition ratio as in example 2 and substantially the same preparation method as in example 2, except that the aging treatment in step 5) was not performed.
The comparative example tests the performance of the high-strength magnesium alloy prepared in the step 4), and the result is as follows: the performance indexes of the extrusion bar prepared by the extrusion process are as follows: the yield strength is 322MPa, the tensile strength is 379MPa, and the elongation is 10.6%.
As can be seen from comparison between comparative example 1 and example 2, the strength of the high-strength magnesium alloy prepared by the comparative example is lower, and the elongation is higher, which may be because: the precipitation phase after aging treatment enables the strength of the alloy to be remarkably increased and the elongation to be remarkably reduced by hindering dislocation slip.
Comparative example 2
This comparative example relates to a high-strength magnesium alloy having the same composition ratio as in example 2, and a method of manufacturing the magnesium alloy substantially the same as in example 2, except that the casting manner in step 3) is gravity casting.
The performance of the high-strength magnesium alloy prepared in the step 5) is tested, and the result is as follows: the performance indexes of the extrusion bar prepared by the extrusion process are as follows: the yield strength is 401MPa, the tensile strength is 481MPa, and the elongation is 5.8%.
As can be seen by comparing comparative example 2 with example 2, the strength and elongation of the high strength magnesium alloy prepared by this comparative example are lower, probably because: after the centrifugal casting alloy is homogenized and extruded, more crystal grains which are not dynamically recrystallized exist in the alloy, so that more LPSO phases and subgrain boundaries exist in the crystal grains which are not dynamically recrystallized, and the alloy has more excellent strengthening effect; in addition, the centrifugal casting alloy has fewer air holes and impurities, so the corresponding extruded alloy has fewer air holes and impurities, and the improvement of the strength and the plasticity of the alloy is facilitated.
Comparative example 3
This comparative example relates to a high-strength magnesium alloy having the same composition ratio as in example 2, and a manufacturing method thereof substantially the same as in example 2, except that the extrusion speed in step 4) was 0.4mm/s.
The comparative example tests the performance of the high-strength magnesium alloy prepared in the step 5), and the result is as follows:
the performance indexes of the extrusion bar prepared by the extrusion process are as follows: 467MPa, 535MPa of tensile strength and 4.5 percent of elongation.
As can be seen from comparison of comparative example 3 with example 2, the strength of the high-strength magnesium alloy prepared by the comparative example is higher, and the elongation is lower, which is probably because: a large amount of deformation state grains exist in the low-speed extrusion alloy, and a large amount of LPSO phases and subgrain boundaries exist in the low-speed extrusion alloy, so that the tensile strength of the alloy can be greatly improved.
Comparative example 4
This comparative example relates to a high-strength magnesium alloy having the same composition ratio as in example 2 and substantially the same production method as in example 2, except that the extrusion speed in step 4) was 13mm/s.
In the comparative example, the performance of the magnesium alloy prepared in the step 5) was tested, and the results were as follows: the yield strength is 302MPa, the tensile strength is 398MPa, and the elongation is 7.1 percent.
As can be seen by comparing comparative example 2 with example 2, the yield strength and tensile strength of the high strength magnesium alloy prepared by this comparative example are lower, probably because: at an excessively high extrusion speed, the dynamically recrystallized grains in the alloy almost completely disappear, the alloy microstructure is basically completely converted into the dynamically recrystallized grains, the structural uniformity is improved, but the size of the dynamically recrystallized grains is obviously increased, so that the alloy performance is obviously reduced.
Comparative example 5
This comparative example relates to a high-strength magnesium alloy having the same composition ratio as in example 2 and basically the same preparation method as in example 2, except that the extrusion temperature in step 4) was 480 ℃.
In the comparative example, the performance of the magnesium alloy prepared in the step 5) was tested, and the results were as follows: the yield strength was 351MPa, the tensile strength was 442MPa, and the elongation was 7.3%. As can be seen by comparing comparative example 3 with example 2, the yield strength and tensile strength of the high strength magnesium alloy prepared by this comparative example are lower, probably because: the reduction in the amount of the second phase and the increase in the average grain size with increasing extrusion temperature results in a decrease in the strength of the alloy.
Taking the high-strength magnesium alloy prepared in the embodiment 2 as an example, the microstructure analysis is carried out by using an optical microscope and a scanning electron microscope; specifically, the metallographic structure, SEM and TEM images of the high-strength magnesium alloy prepared in example 2 are shown in fig. 1, 2 and 3, respectively, and it can be seen that the high-strength magnesium alloy of the present invention exhibits a typical bimodal structure consisting of fine dynamically recrystallized grains having a weak basal plane texture and coarse non-dynamically recrystallized grains having a strong basal plane texture.
As can be seen from the above examples and data, the magnesium alloy material prepared by the invention has higher comprehensive performance at room temperature. The centrifugal casting-extrusion process ensures that the Mg-Gd-Y-Zn-Zr alloy has higher comprehensive mechanical property under high-speed extrusion; a large number of lamellar LPSO phases, dynamic precipitated phases, aging precipitated phases and dynamic recrystallization grains exist in the extruded bar, and play a key role in improving the performance of the alloy.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (6)
1. A method for efficiently preparing a high-strength magnesium alloy is characterized by comprising the following steps:
a) The following raw materials were obtained: preparing a pure magnesium ingot, a magnesium-gadolinium intermediate alloy, a magnesium-yttrium intermediate alloy, pure zinc particles and a magnesium-zirconium intermediate alloy;
b) Preparing an alloy melt from the pure magnesium ingot, the magnesium-gadolinium intermediate alloy, the magnesium-yttrium intermediate alloy, the pure zinc particles and the magnesium-zirconium intermediate alloy obtained in the step A);
c) Carrying out centrifugal casting on the alloy melt prepared in the step B) to obtain an alloy ingot;
d) Carrying out homogenization heat treatment and extrusion forming on the alloy cast ingot in the step C) to obtain an extruded bar of the magnesium alloy; the extrusion forming conditions are as follows: the extrusion ratio is 16-25, the extrusion speed is 8-10mm/s, and the extrusion temperature is 420-460 ℃;
e) Carrying out aging treatment on the extruded bar in the step D).
2. The method for efficiently manufacturing a high-strength magnesium alloy according to claim 1, wherein the extrusion speed is 8mm and the extrusion temperature is 450 ℃.
3. The method for efficiently preparing the high-strength magnesium alloy according to claim 1 or 2, wherein the step D) is specifically as follows: removing the surface oxide layer of the cast ingot obtained in the step C), placing the cast ingot in a muffle furnace for homogenization heat treatment, then carrying out extrusion molding on the cast ingot subjected to the homogenization heat treatment in an extruder, and cooling to room temperature to obtain an extruded bar.
4. The method for efficiently preparing the high-strength magnesium alloy according to claim 1, wherein the chemical element composition of the raw materials comprises, in terms of mass fraction: 8.0 to 8.5 percent of Gd, 3.5 to 4.0 percent of Y, 1.0 to 1.5 percent of Zn, 0.4 to 0.6 percent of Zr, and the balance of magnesium and inevitable impurities, wherein the total content of the impurities is less than or equal to 0.3 percent.
5. The method for efficiently preparing the high-strength magnesium alloy according to claim 3, wherein the step C) is specifically as follows: keeping the alloy melt obtained in the step B) at the temperature of 700-720 ℃ for 3-6 minutes, pouring the alloy melt into a centrifugal casting mold, naturally cooling, and performing wire cutting processing to obtain an ingot with the diameter of phi 80.
6. The method for efficiently preparing the high-strength magnesium alloy according to claim 4, wherein the temperature of the homogenization heat treatment is 500-520 ℃, and the time of the homogenization heat treatment is 12-15 hours; the temperature of the aging treatment is 180-220 ℃, and the time of the aging treatment is 40-55 hours.
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