CN111873601A - Method for improving strong plasticity of magnesium alloy plate - Google Patents
Method for improving strong plasticity of magnesium alloy plate Download PDFInfo
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Abstract
The invention discloses a method for improving the strong plasticity of a magnesium alloy plate, which comprises the following steps: s1, carrying out solid solution treatment on the magnesium alloy plate to obtain a solid solution magnesium alloy plate; carrying out solid solution aging treatment on the magnesium alloy plate to obtain an aged magnesium alloy plate; s2, alternately stacking the solid-solution-state magnesium alloy plates and the aging-state magnesium alloy plates to form a multilayer-structure laminated plate, wherein the outermost layer of the laminated plate is the aging-state magnesium alloy plate, and S3, carrying out extrusion compounding or rolling compounding on the laminated plate to obtain a finished product. The method can simultaneously give consideration to the strength and plasticity of the magnesium alloy material, has simple process flow, and is suitable for large-scale industrial application.
Description
Technical Field
The invention relates to the field of magnesium alloy material processing, in particular to a method for improving the plasticity of a magnesium alloy plate.
Background
The magnesium alloy has the advantages of low density, high specific strength, easy recovery, good vibration damping property and the like, and has wide application prospect in the fields of aerospace, automobiles, digital 3C and the like. However, the commonly used magnesium alloy has a close-packed hexagonal crystal structure, and has less active slip systems at room temperature compared with the face-centered cubic structure metals such as aluminum, copper and the like, so that the room-temperature plasticity of the alloy is poor, particularly, the uniform elongation of the high-strength magnesium alloy is extremely low, the tensile strength of the ultrahigh-strength magnesium alloy can reach more than 500MPa, and the elongation is usually only about 5%. This imbalance of strength and plasticity severely limits the applications of magnesium alloys. To overcome this problem of strong plastic inversion, some researchers have turned their attention to severe plastic deformation of magnesium alloys, such as: the magnesium alloy material with uniform and fine structure is prepared by adopting methods of accumulative pack rolling, namely ARB, equal channel angular extrusion, namely ECAP, high-pressure torsion, namely HPT and the like. Although the prepared magnesium alloy has higher strength, the high-strength magnesium alloy materials prepared by the deformation process mostly have low work hardening capacity due to the limited accumulated dislocation of fine grains and other defects.
In recent years, some researchers begin to add rare earth elements into magnesium alloys, and on one hand, the addition of the rare earth elements can weaken basal plane textures of the magnesium alloys and improve the plastic deformation capacity of the magnesium alloys; on the other hand, the rare earth phase formed by adding the rare earth elements can effectively pin grain boundaries and dislocation, and the strength of the material is improved. With the extensive research at home and abroad, alloying has proved to be an effective way to improve the strength and plasticity of magnesium alloy. However, it should be noted that due to the high price of rare earth elements, the addition of rare earth elements also greatly increases the cost of developing high-strength and high-plasticity magnesium alloys, so that these materials are limited to the laboratory research stage and are difficult to realize large-scale industrial preparation. Therefore, it is necessary to develop a method for mass production of magnesium alloy materials having both high plasticity and low cost.
Disclosure of Invention
The invention aims to provide a method for improving the strength and plasticity of a magnesium alloy plate, which can simultaneously give consideration to the strength and plasticity of the magnesium alloy plate, has simple process flow and is suitable for large-scale industrial application.
The method for improving the strong plasticity of the magnesium alloy sheet comprises the following steps:
s1, carrying out solid solution treatment on the magnesium alloy plate to obtain a solid solution magnesium alloy plate; carrying out solid solution aging treatment on the magnesium alloy plate to obtain an aged magnesium alloy plate;
s2, the magnesium alloy plates in the solid solution state and the magnesium alloy plates in the aging state are alternately stacked to form a laminated plate with a multilayer structure, the outermost layer of the laminated plate is the magnesium alloy plate in the aging state,
and S3, performing extrusion compounding or rolling compounding on the laminated plate to obtain a finished product.
Furthermore, the solid solution temperature of the solid solution treatment in the S1 is 410-430 ℃, and the solid solution time is 12-24 h.
Further, the aging temperature of the aging treatment in the S1 is 160-220 ℃, and the aging time is 5-20 h.
Further, the thickness of the solid-solution magnesium alloy plate is equal to that of the aging-state magnesium alloy plate;
or the thicknesses of the solid-solution magnesium alloy plate and the aging magnesium alloy plate are adjusted according to the mechanical property requirement of the finished product.
Further, the extrusion compounding in S3 specifically includes: and (3) placing the laminated plate in an extrusion die at the temperature of 220-350 ℃ for heat preservation for 5-10 min, and then extruding at the extrusion speed of 4-10 mm/s and the extrusion deformation of 60-90%.
Further, the rolling and compounding in S3 specifically includes: the rolling temperature is 200-480 ℃, the rolling speed is 0.2-20 m/s, and the rolling deformation is 30-80%.
Further, the magnesium alloy plate is an AZ series magnesium alloy extruded plate or a rolled plate.
Compared with the prior art, the invention has the following beneficial effects.
1. According to the invention, the solid solution state magnesium alloy plate and the aging state magnesium alloy plate are alternately stacked to form a laminated plate with a multilayer structure, and the laminated plate is subjected to extrusion compounding or rolling compounding, the aging state magnesium alloy plate generates continuous and/or discontinuous precipitated phases, so that the dislocation movement and grain boundary migration are hindered, the strength and plasticity of the plate are favorably improved, the grain size of the solid solution state magnesium alloy plate is large, more dislocations can be accommodated in the deformation process, and the plasticity of the plate is favorably improved. Therefore, the solid solution state magnesium alloy plate and the aging state magnesium alloy plate are combined together, the plates in the two states show different deformation behaviors due to the number, the size and the distribution of precipitated phases of the solid solution state magnesium alloy plate and the aging state magnesium alloy plate and the difference of microstructures in crystal grains, and further in the tensile deformation process, the solid solution layer provides better elongation, and the aging layer is beneficial to maintaining higher strength and plasticity, so that the magnesium alloy plate shows excellent strength and plasticity matching.
2. According to the invention, the aging temperature of the aging treatment is 160-200 ℃, the aging time is 5-20 h, if the aging temperature is too high, precipitated phases are coarse, local stress concentration is easily caused in the coarse precipitated phase regions in the deformation process, and the improvement of the performance of the plate is not facilitated. If the aging temperature is too low, the precipitation kinetics is insufficient, and the aging time needs to be prolonged to promote the generation of precipitated phases, which increases the treatment cost accordingly.
3. The invention has special limitation on extrusion parameters, if the extrusion temperature is too high, the grain size of the sheet is large, which is not beneficial to improving the performance of the sheet, and the hot cracking of the extruded product is easy to cause in the extrusion process. If the extrusion temperature is too low, the magnesium alloy has a close-packed hexagonal crystal structure, so that the plastic deformation capability is poor and the molding is difficult. The higher the extrusion speed, the better the extrusion speed is when the extruder capacity allows, while the setting of the extrusion speed is also influenced by the extrusion temperature, which can be suitably increased when the extrusion temperature rises. The extrusion speed is increased, and the flow stress is obviously reduced due to the heat effect caused by extrusion deformation; if the extrusion speed is too high, the work hardening rate of the metal is greater than the dynamic recrystallization softening rate of the metal in the deformation process, so that the flow stress of the blank is increased. Generally, the amount of press deformation is appropriate to obtain good grain structure and mechanical properties, and for the press deformation of the laminated plate, the amount of single pass deformation is at least 60% or more, which is beneficial to the bonding quality between the plates. In addition, the larger the extrusion deformation amount is, the finer the plate structure is, and the strength of the plate is high. In conclusion, in order to simultaneously consider the strength and the plasticity of the magnesium alloy plate, the extrusion temperature is limited to 230-300 ℃, the extrusion speed is limited to 5-6 mm/s, and the extrusion deformation is limited to 60-90%.
4. The invention has special limitation on rolling parameters, avoids the defect of rolling crack in the rolling process and ensures the effective combination of the solid solution state magnesium alloy plate and the aging state magnesium alloy plate.
5. According to the invention, the thickness of the solid solution state magnesium alloy plate and the thickness of the aging state magnesium alloy plate are adjusted, so that the adjustment of the thicknesses of layers in different states in the laminated plate is realized, the performance regulation of the finished product is further realized, the finished product can meet the performance requirements of different scenes, and the application range is wide.
6. The method does not need to adjust the components of the magnesium alloy plate, has simple process flow and controllable finished product performance, and is suitable for large-scale industrial application.
Drawings
FIG. 1 is a schematic of the process of the present invention;
fig. 2 is a top view of the extrusion apparatus of the present invention.
In the figure, 1 is a magnesium alloy plate in a solid solution state, 2 is a magnesium alloy plate in an aging state, 3 is an extrusion die, and 4 is an extrusion cylinder.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
The embodiment I is a method for improving the strength and the plasticity of a magnesium alloy plate, and comprises the following steps of:
s1, carrying out solution treatment on the extruded AZ91 magnesium alloy plate with the thickness of 3mm in the initial state, wherein the solution temperature is 410 ℃, and the solution time is 12h, so as to obtain the solid solution magnesium alloy plate, and the mark is SS. And (3) carrying out aging treatment on part of the solid solution state magnesium alloy plate, wherein the aging temperature is 180 ℃, and the aging time is 5h, so as to obtain an aged state magnesium alloy plate, which is marked as A5.
S2, cutting the solid solution state magnesium alloy plate and the aging state magnesium alloy plate into small plates with the size of 35mm multiplied by 15mm multiplied by 1.5mm, two solid solution state magnesium alloy plates and three aging state magnesium alloy plates, and respectively carrying out surface polishing and oil removing treatment. Referring to fig. 1 and 2, a solid solution state magnesium alloy sheet 1 after degreasing and an aged state magnesium alloy sheet 2 are alternately stacked to form a laminate of a multilayer structure, and the outermost layer of the laminate is an aged state magnesium alloy sheet.
S3, after the temperature of the extrusion die 4 and the extrusion cylinder 3 is raised to 250 ℃ and stabilized, the laminated plate is placed in the extrusion cylinder 3 and is subjected to heat preservation for 8min for extrusion, graphite water is sprayed on the inner wall of the extrusion cylinder 3 before extrusion to serve as a lubricant, the extrusion speed is 6mm/S, the extrusion deformation is 90%, a finished product with the thickness of about 1.5mm is obtained, the yield strength of the finished product at room temperature is 178MPa, the tensile strength of the finished product is 385MPa, and the elongation at break of the finished product is 19.7%.
In the second embodiment, the adopted magnesium alloy plate raw materials, the solution treatment process and the extrusion compounding process are the same as those in the first embodiment, except that the aging treatment process parameters are different, the aging temperature is 180 ℃, the aging time is 10 hours, the yield strength of the obtained finished product at room temperature is 185MPa, the tensile strength is 386MPa, and the elongation at break is 19.6%.
In the third embodiment, the adopted magnesium alloy plate raw materials, the solution treatment process and the extrusion compounding process are the same as those in the first embodiment, except that the aging treatment process parameters are different, the aging temperature is 180 ℃, the aging time is 20 hours, the yield strength of the obtained finished product at room temperature is 173Mpa, the tensile strength is 379Mpa, and the elongation at break is 19.5%.
In the fourth embodiment, parameters of a solution treatment process, an aging treatment process and an extrusion compounding process adopted by the method for improving the strength and the plasticity of the magnesium alloy plate are the same as those of the first embodiment, the adopted magnesium alloy raw material is an extruded AZ91 magnesium alloy plate with the thickness of 5mm in the initial state, and the obtained finished product has the yield strength of 188MPa, the tensile strength of 361MPa and the elongation at break of 16.1% at room temperature.
In the fifth embodiment, the parameters of the adopted magnesium alloy plate raw material, the solution treatment process and the extrusion compounding process are the same as those of the fourth embodiment, except that the aging treatment process parameters are different, the aging temperature is 180 ℃, the aging time is 10 hours, the yield strength of the obtained finished product at room temperature is 180MPa, the tensile strength is 370MPa, and the elongation at break is 20.0%.
And the sixth embodiment is a method for improving the strength and the plasticity of the magnesium alloy plate, the adopted magnesium alloy plate raw materials, the solution treatment process and the extrusion compounding process parameters are the same as those of the fourth embodiment, except that the aging treatment process parameters are different, the aging temperature is 180 ℃, the aging time is 20 hours, the yield strength of the obtained finished product at room temperature is 178Mpa, the tensile strength is 358Mpa, and the elongation at break is 18.3%.
The seventh embodiment is a method for improving the strength and the plasticity of the magnesium alloy sheet, the adopted magnesium alloy sheet raw materials and the extrusion compounding process are the same as those of the first embodiment, the solid solution temperature is 430 ℃, the solid solution time is 20 hours, the aging temperature is 220 ℃, the aging time is 5 hours, and the strength and the plasticity of the obtained finished product are kept at higher levels through mechanical property detection.
The eighth embodiment is a method for improving the strength and the plasticity of a magnesium alloy plate, the adopted magnesium alloy plate raw materials and the extrusion compounding process are the same as those of the first embodiment, the solid solution temperature is 430 ℃, the solid solution time is 15 hours, the aging temperature is 220 ℃, the aging time is 10 hours, and the strength and the plasticity of the obtained finished product are kept at higher levels through mechanical property detection.
The ninth embodiment provides a method for improving the strength and the plasticity of a magnesium alloy plate, the adopted magnesium alloy plate raw materials and the extrusion compounding process are the same as those of the first embodiment, the solid solution temperature is 430 ℃, the solid solution time is 12 hours, the aging temperature is 220 ℃, the aging time is 20 hours, and the strength and the plasticity of the obtained finished product are kept at higher levels through mechanical property detection.
The method for improving the strength and the plasticity of the magnesium alloy plate comprises the steps of adopting the magnesium alloy plate raw material, the solution treatment process and the aging treatment process which are the same as those in the first embodiment, wherein the extrusion temperature is 350 ℃, the extrusion speed is 5mm/s, the extrusion deformation is 80%, and the strength and the plasticity of an obtained finished product are kept at a higher level through mechanical property detection.
In the eleventh embodiment, the magnesium alloy sheet raw material, the solution treatment process and the aging treatment process are the same as those in the first embodiment, the extrusion temperature is 300 ℃, the extrusion speed is 10mm/s, the extrusion deformation is 85%, and the strength and the plasticity of the obtained finished product are kept at higher levels through mechanical property detection.
In the twelfth embodiment, parameters of a solution treatment process, an aging treatment process and an extrusion compounding process adopted by the method for improving the strength and the plasticity of the magnesium alloy plate are the same as those of the first embodiment, the adopted magnesium alloy raw material is an extruded AZ91 magnesium alloy plate with the thickness of 5mm in the initial state, and the strength and the plasticity of the obtained finished product are kept at higher levels through mechanical property detection.
Embodiment thirteen, a method for improving the strength and plasticity of magnesium alloy plates, the adopted magnesium alloy raw materials, the solution treatment process and the aging treatment process are the same as those of the embodiment one, the aging state magnesium alloy plate and the solution state magnesium alloy plate are laminated and then are rolled and compounded, and the specific process parameters are as follows: the rolling temperature was 300 ℃, the rolling speed was 10m/s, and the rolling deformation was 80%. The mechanical property detection shows that the strength and the plasticity of the obtained finished product are kept at a higher level.
Fourteen embodiments, a method for improving the strength and plasticity of a magnesium alloy plate, which adopts the same magnesium alloy raw material, solution treatment process and aging treatment process as the first embodiment, the aging magnesium alloy plate and the solution magnesium alloy plate are laminated and then are rolled and compounded, and the specific process parameters are as follows: the rolling temperature was 200 ℃, the rolling speed was 20m/s, and the rolling deformation was 30%. The mechanical property detection shows that the strength and the plasticity of the obtained finished product are kept at a higher level.
Fifteen, an embodiment, a method for improving the strength and the plasticity of a magnesium alloy plate, which adopts the same magnesium alloy raw material, solution treatment process and aging treatment process as the first embodiment, wherein the aging state magnesium alloy plate and the solution state magnesium alloy plate are laminated and then are rolled and compounded, and the specific process parameters are as follows: the rolling temperature was 480 ℃, the rolling speed was 20m/s, and the rolling deformation was 50%. The mechanical property detection shows that the strength and the plasticity of the obtained finished product are kept at a higher level.
Sixthly, the method for improving the strength and the plasticity of the magnesium alloy plate adopts the same magnesium alloy raw material, the solution treatment process and the aging treatment process as the first embodiment, the aging state magnesium alloy plate and the solution state magnesium alloy plate are laminated and then are subjected to rolling compounding, and the specific process parameters are as follows: the rolling temperature was 400 ℃, the rolling speed was 8m/s, and the rolling deformation was 70%. The mechanical property detection shows that the strength and the plasticity of the obtained finished product are kept at a higher level.
Seventhly, the method for improving the strength and the plasticity of the magnesium alloy plate adopts the solution treatment process, the aging treatment process and the extrusion composite process with the same parameters as those of the first embodiment, and adopts the AZ91 magnesium alloy rolled plate with the initial state of 3mm thickness as the magnesium alloy raw material. The mechanical property detection shows that the strength and the plasticity of the obtained finished product are kept at a higher level.
Eighteen, a method for improving the strength and the plasticity of a magnesium alloy plate, which adopts magnesium alloy plate raw materials, a solution treatment process and extrusion composite process parameters the same as those of seventeen embodiments, except that the aging treatment process parameters are different, the aging temperature is 180 ℃, and the aging time is 10 hours. The mechanical property detection shows that the strength and the plasticity of the obtained finished product are kept at a higher level.
Nineteenth example, a method for improving the strength and plasticity of a magnesium alloy plate, which adopts magnesium alloy plate raw materials, a solution treatment process and extrusion composite process parameters which are the same as those of seventeenth example, except that the aging treatment process parameters are different, the aging temperature is 180 ℃, and the aging time is 20 hours. The mechanical property detection shows that the strength and the plasticity of the obtained finished product are kept at a higher level.
Twenty examples, to verify the effectiveness of the method, the mechanical properties of magnesium alloy sheets in different states were analyzed by comparison, and the results are shown in table 1.
TABLE 1 mechanical Properties of magnesium alloy sheets (3mm and 5mm thick) in different states
| Serial number | State of the sample | Yield strength/MPa | Tensile strength/MPa | Elongation at break/%) |
| Comparative example 1 | As-extruded | 203 | 329 | 10.3 |
| Comparative example No. two | SS | 166 | 318 | 12.3 |
| Comparative example No. three | A5+A5 | 178 | 376 | 17.0 |
| Comparative example No. four | A10+A10 | 182 | 375 | 17.7 |
| Comparative example five | A20+A20 | 179 | 373 | 17.3 |
| Comparative example six | E+A5 | 190 | 370 | 15.5 |
| Comparative example seven | E+A10 | 188 | 364 | 15.7 |
| Comparative example eight | E+A20 | 189 | 363 | 14.4 |
| Example one | SS+A5(3mm) | 178 | 385 | 19.7 |
| Example two | SS+A10(3mm) | 185 | 386 | 19.8 |
| EXAMPLE III | SS+A20(3mm) | 173 | 379 | 19.5 |
| Example four | SS+A5(5mm) | 188 | 367 | 18.3 |
| EXAMPLE five | SS+A10(5mm) | 180 | 375 | 21.2 |
| EXAMPLE six | SS+A20(5mm) | 178 | 361 | 20.0 |
Comparative example one the same magnesium alloy starting material As in example one, namely a 3mm thick extruded AZ91 magnesium alloy sheet designated As-extruded, was used.
In the second comparative example, a solid solution magnesium alloy sheet obtained by using the same magnesium alloy raw material and the same solid solution treatment process as in the first example was designated as SS.
Comparative examples three to five the magnesium alloy raw materials, the solution treatment process and the aging temperature are the same as those of the example one, the aging time is respectively 5h, 10h and 20h, a plurality of aged magnesium alloy plates are stacked to form a laminated plate, namely, each layer of the laminated plate is the aged magnesium alloy plate, the extrusion compounding is carried out by adopting the extrusion process parameters the same as those of the example one, and the comparative examples three, four and five are respectively marked as A5+ A5, A10+ A10 and A20+ A20.
Sixth to eighth comparative examples used the same magnesium alloy raw material, solution treatment process and aging temperature as in the first example, aging times were 5h, 10h and 20h, respectively, and extruded AZ91 magnesium alloy sheets having a thickness of 3mm in the initial state and aged magnesium alloy sheets were alternately stacked to form a laminate, and extrusion-compounded using the same extrusion process parameters as in the first example, and sixth, seventh and eighth comparative examples were denoted as E + a5, E + a10 and E + a20, respectively.
Examples four to six the same solution treatment process and extrusion process as in example one were used except that the raw material was an extruded AZ91 magnesium alloy sheet 5mm thick, the aging temperature was the same, the aging time was 5h, 10h, 20h, respectively, and was designated as SS + a5(5mm), SS + a10(5mm), and SS + a20(5 mm).
As can be seen from table 1, the elongation at break of comparative example No. two SS after solution treatment was slightly increased As compared to As-extruded of comparative example No. one, but the yield strength and tensile strength of the material were much decreased due to coarse grains inside the material during the solution treatment.
Compared with As-extruded of the first comparative example, the strength and plasticity of the third comparative example A5+ A5, the fourth comparative example A10+ A10 and the fifth comparative example A20+ A20 are improved, mainly because after the aged magnesium alloy plate is extruded and deformed, a plurality of fine precipitated phases are generated in crystal grains and crystal boundaries, and the precipitated phases effectively pin the crystal boundaries and block the movement of dislocation, so that the strength of the plate is improved, and meanwhile, reasonable elongation is maintained.
The six E + A5 comparative example, the seven E + A10 comparative example and the eight E + A20 comparative example adopt the composite lamination extrusion of the initial state extruded magnesium alloy plate and the aging state magnesium alloy, which improves the strength and the plasticity of the material to a certain extent, but because the dislocation density in the fine grains of the initial state extruded magnesium alloy plate is very high, the dislocation containing capability is limited, and the plasticity of the plate is lower than that of the finished product obtained by the composite lamination extrusion of the single aging state magnesium alloy plate.
The elongation at break of the magnesium alloy plates prepared in the first to third embodiments is more than 19%, which shows that the material has good plasticity and the tensile strength is kept at a high level, namely, the first to third embodiments improve the plasticity of the magnesium alloy plates and simultaneously give consideration to the strength performance.
The magnesium alloy sheets obtained in examples four to six were superior in elongation at break as a whole to those obtained in examples one to three, but were lower in tensile strength than those obtained in examples one to three.
Therefore, the solid solution state magnesium alloy plate and the aging state magnesium alloy plate are alternately stacked to form the laminated plate with a multilayer structure, the laminated plate is subjected to extrusion compounding or rolling compounding, the aging state magnesium alloy generates continuous and/or discontinuous precipitated phases, the dislocation movement and grain boundary migration are hindered, the strength and the plasticity of the plate are improved, the grain size of the solid solution state magnesium alloy plate is large, more dislocations can be accommodated in the deformation process, and the plasticity of the plate is improved. Therefore, the solid solution state magnesium alloy plate and the aging state magnesium alloy plate are combined together, the plates in the two states show different deformation behaviors due to the number, the size and the distribution of precipitated phases of the solid solution state magnesium alloy plate and the aging state magnesium alloy plate and the difference of microstructures in crystal grains, and further in the process of tensile deformation, the solid solution layer provides better elongation, and the aging layer is beneficial to maintaining higher strength and plasticity, so that the magnesium alloy plate shows excellent strength and plasticity matching, namely the tensile strength and the fracture elongation can reach higher levels.
Finally, the above examples only illustrate the technical solution of the present invention by way of example of an age-able magnesium alloy, and although the present invention has been described in detail by way of the above preferred examples, it should be noted that the solution can also be applied to age-able aluminum alloy extruded or rolled sheet by changing the relevant process parameters. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims.
Claims (7)
1. A method for improving the strength and the plasticity of a magnesium alloy plate is characterized by comprising the following steps:
s1, carrying out solid solution treatment on the magnesium alloy plate to obtain a solid solution magnesium alloy plate; carrying out solid solution aging treatment on the magnesium alloy plate to obtain an aged magnesium alloy plate;
s2, the magnesium alloy plates in the solid solution state and the magnesium alloy plates in the aging state are alternately stacked to form a laminated plate with a multilayer structure, the outermost layer of the laminated plate is the magnesium alloy plate in the aging state,
and S3, performing extrusion compounding or rolling compounding on the laminated plate to obtain a finished product.
2. The method for improving the strength and the plasticity of the magnesium alloy sheet according to claim 1, wherein the method comprises the following steps: the solid solution temperature of the solid solution treatment in the S1 is 410-430 ℃, and the solid solution time is 12-24 h.
3. The method for improving the strength and the plasticity of the magnesium alloy sheet according to claim 1 or 2, wherein the method comprises the following steps: and in the S1, the aging temperature of the aging treatment is 160-220 ℃, and the aging time is 5-20 h.
4. The method for improving the strength and the plasticity of the magnesium alloy sheet according to claim 1 or 2, wherein the method comprises the following steps: the thickness of the solid-solution magnesium alloy plate is equal to that of the aging-state magnesium alloy plate;
or the thicknesses of the solid-solution magnesium alloy plate and the aging magnesium alloy plate are adjusted according to the mechanical property requirement of the finished product.
5. The method for improving the strength and the plasticity of the magnesium alloy sheet according to claim 1 or 2, wherein the extrusion compounding in the step S3 is specifically as follows: and (3) placing the laminated plate in an extrusion die at the temperature of 220-350 ℃ for heat preservation for 5-10 min, and then extruding at the extrusion speed of 4-10 mm/s and the extrusion deformation of 60-90%.
6. The method for improving the strength and the plasticity of the magnesium alloy sheet material as claimed in claim 1 or 2, wherein the rolling and compounding in the S3 is specifically as follows: the rolling temperature is 200-480 ℃, the rolling speed is 0.2-20 m/s, and the rolling deformation is 30-80%.
7. The method for improving the strength and the plasticity of the magnesium alloy sheet according to claim 1 or 2, wherein the method comprises the following steps: the magnesium alloy plate in the S1 is an AZ series magnesium alloy extruded plate or a rolled plate.
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| CN112831739A (en) * | 2020-12-31 | 2021-05-25 | 长沙理工大学 | Processing method for improving high-temperature creep property of magnesium alloy through rolling and hammering |
| CN114107231A (en) * | 2021-12-13 | 2022-03-01 | 重庆大学 | Recombinant adeno-associated virus for realizing cell body labeling of whole brain postsynaptic neurons and application thereof |
| CN114535341A (en) * | 2022-02-25 | 2022-05-27 | 吉林大学 | Layered special-shaped texture magnesium alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112831739A (en) * | 2020-12-31 | 2021-05-25 | 长沙理工大学 | Processing method for improving high-temperature creep property of magnesium alloy through rolling and hammering |
| CN112831739B (en) * | 2020-12-31 | 2022-01-28 | 长沙理工大学 | Processing method for improving high-temperature creep property of magnesium alloy through rolling and hammering |
| CN114107231A (en) * | 2021-12-13 | 2022-03-01 | 重庆大学 | Recombinant adeno-associated virus for realizing cell body labeling of whole brain postsynaptic neurons and application thereof |
| CN114107231B (en) * | 2021-12-13 | 2023-08-18 | 重庆大学 | Recombinant adeno-associated virus for realizing whole brain postsynaptic neuron cell body marking and application thereof |
| CN114535341A (en) * | 2022-02-25 | 2022-05-27 | 吉林大学 | Layered special-shaped texture magnesium alloy and preparation method thereof |
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