CN115090708A - Magnesium alloy plate and method for preparing magnesium alloy plate through online composite deformation - Google Patents
Magnesium alloy plate and method for preparing magnesium alloy plate through online composite deformation Download PDFInfo
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- CN115090708A CN115090708A CN202210766026.1A CN202210766026A CN115090708A CN 115090708 A CN115090708 A CN 115090708A CN 202210766026 A CN202210766026 A CN 202210766026A CN 115090708 A CN115090708 A CN 115090708A
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000001125 extrusion Methods 0.000 claims abstract description 35
- 238000001192 hot extrusion Methods 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 10
- 238000010008 shearing Methods 0.000 claims abstract description 8
- 238000001953 recrystallisation Methods 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 14
- 238000000137 annealing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 12
- 239000013078 crystal Substances 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000002918 waste heat Substances 0.000 abstract description 3
- 230000001939 inductive effect Effects 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/06—Making sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
- B21C35/03—Straightening the work
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses a method for preparing a magnesium alloy plate by online composite deformation, which comprises the following steps: carrying out hot extrusion on a magnesium alloy ingot to prepare a magnesium alloy plate; the magnesium alloy plate is pulled out, the alloy plate is obliquely sheared and deformed, then the plate is synchronously straightened under the action of the traction force, and the magnesium alloy plate is annealed. The invention also discloses a magnesium alloy plate prepared by the method for preparing the magnesium alloy plate by online composite deformation. According to the magnesium alloy plate and the method for preparing the magnesium alloy plate through online composite deformation, the effect of an inclined die is coupled in the extrusion process, online local deformation is realized, the effect of inducing different orientations by shearing strain gradient is generated, the dynamic recrystallization behavior is realized by combining with partial waste heat after the magnesium alloy plate is extruded, the base texture and the crystal orientation of the magnesium alloy plate are regulated and controlled, the plate straightening effect is realized by utilizing the traction effect, and the high-performance magnesium alloy plates with different thicknesses can be continuously prepared on line.
Description
Technical Field
The invention relates to the technical field of magnesium alloy plate processing, in particular to a magnesium alloy plate and a method for preparing the magnesium alloy plate by online composite deformation.
Background
The research and development of the magnesium alloy can promote the 'double-carbon' target through energy conservation and emission reduction and promote energy low-carbon transformation. The magnesium alloy is the most potential lightweight material, has the characteristics of small density, high specific strength, vibration and noise reduction, abundant resources and the like, has the specific strength far higher than that of steel, aluminum alloy and titanium alloy, has extremely obvious lightweight effect, has important lightweight application potential in the fields of automobiles, motorcycles, rail transit, aerospace, information industry, energy industry and the like, and is a strategic new material concerned by various countries.
However, the magnesium alloy has a close-packed hexagonal crystal structure, the critical shear stress of cylindrical surface and conical surface slippage is much larger than that of basal surface slippage during room temperature plastic forming, so that a strong basal surface texture is formed, the plastic deformation forming capability is poor, and further, the magnesium alloy plate has long processing procedure and low yield. Improving the plastic formability of magnesium alloys is a major means to expand the applications of magnesium alloys.
Disclosure of Invention
Therefore, it is necessary to provide a magnesium alloy sheet and a method for preparing the magnesium alloy sheet by online composite deformation, aiming at the problems that the existing magnesium alloy forms a strong basal plane texture and has poor plastic deformation forming capability during room-temperature plastic forming.
A method for preparing a magnesium alloy plate by online composite deformation comprises the following steps:
carrying out hot extrusion on a magnesium alloy ingot to prepare a magnesium alloy plate;
drawing the magnesium alloy plate out, enabling the alloy plate to be obliquely sheared and deformed, and then synchronously straightening the plate under the action of traction force;
and annealing the magnesium alloy plate.
In one embodiment, the step of performing hot extrusion on the magnesium alloy ingot to prepare the magnesium alloy plate specifically comprises the following steps:
carrying out hot extrusion on the magnesium alloy ingot, wherein the extrusion temperature is 300-450 ℃, the extrusion ratio is 20-150, and the extrusion speed is as follows: 5-50 mm/s.
In one embodiment, the magnesium alloy ingot is subjected to hot extrusion through an extruder, the prepared magnesium alloy sheet is drawn out through a tractor, and an inclined die is arranged between the extruder and the tractor and enables the magnesium alloy sheet to be subjected to inclined shearing deformation.
In one embodiment, the angle θ of the tilt mode is 3-60 °.
In one embodiment, the annealing the magnesium alloy sheet specifically comprises:
and (3) preserving the temperature of the magnesium alloy plate for 1-5h at the temperature of 250-350 ℃ to remove stress, generate recrystallization and stabilize the structure.
In one embodiment, a magnesium alloy ingot is hot extruded at an extrusion temperature of 350 ℃, an extrusion ratio of 80, and an extrusion speed of: 10 mm/s;
drawing the magnesium alloy plate out, obliquely shearing and deforming the magnesium alloy plate through an inclined die, and then synchronously straightening the plate under the action of traction force; wherein the angle θ of the tilt mode is 3 °;
and (3) preserving the heat of the magnesium alloy plate for 1.5 hours at the temperature of 300 ℃.
In one embodiment, a magnesium alloy ingot is hot extruded at an extrusion temperature of 350 ℃, an extrusion ratio of 100, and an extrusion speed of: 20 mm/s;
drawing the magnesium alloy plate out, obliquely shearing and deforming the magnesium alloy plate through an inclined die, and then synchronously straightening the plate under the action of traction force; wherein the angle θ of the tilt mode is 30 °;
and (3) keeping the temperature of the magnesium alloy plate at 350 ℃ for 1 h.
The magnesium alloy plate is prepared by any one of the methods for preparing the magnesium alloy plate through online composite deformation.
According to the magnesium alloy plate and the method for preparing the magnesium alloy plate through online composite deformation, the effect of an inclined die is coupled during the extrusion process, online local deformation is realized, strain areas with different degrees are constructed, a shear strain gradient is generated to induce different orientation effects, dynamic recrystallization behavior is realized simultaneously by combining partial waste heat after the extrusion of the magnesium alloy plate, the texture and crystal orientation of the basal plane of the magnesium alloy plate are regulated and controlled, the plate straightening effect is realized by utilizing the traction effect, and the magnesium alloy plates with different thicknesses and high performances can be continuously prepared on line.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. The elements or parts are not necessarily drawn to scale in all figures.
FIG. 1 is a flow chart of a method for manufacturing a magnesium alloy sheet by on-line composite deformation according to an embodiment;
FIG. 2 is a schematic view of a magnesium alloy sheet drawn through an inclined die by a tractor;
FIG. 3 is a schematic view of the tilt module of FIG. 2;
FIG. 4 is a schematic view showing the change in the crystal grain orientation of a magnesium alloy sheet.
Reference numerals:
10-extruder, 20-tractor, 30-inclined die, 32-upper die and 34-lower die.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, a method for preparing a magnesium alloy sheet by online composite deformation according to an embodiment includes the following steps:
step S110: and carrying out hot extrusion on the magnesium alloy ingot to prepare the magnesium alloy plate.
Specifically, the magnesium alloy is AZ31 magnesium alloy. Of course, the magnesium alloy may be made of different materials according to the requirement. Carrying out hot extrusion on an AZ31 magnesium alloy ingot, wherein the extrusion temperature is 300-450 ℃, the extrusion ratio is 20-150, and the extrusion speed is as follows: 5-50mm/s to prepare the magnesium alloy plate.
In one embodiment, the extrusion temperature of the hot extrusion may be 300 ℃, 310 ℃, 320 ℃, 330 ℃, 340 ℃, 350 ℃, 360 ℃, 370 ℃, 380 ℃, 390 ℃, 400 ℃, 410 ℃, 420 ℃, 430 ℃, 440 ℃ or 450 ℃, or may be any other value within the range of 300 ℃ to 450 ℃.
In one embodiment, the extrusion ratio of the magnesium alloy sheet material may be 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, or 150, or may be any other value within the range of 20 to 150.
In one embodiment, the extrusion speed of the hot extrusion of the magnesium alloy sheet material may be 5mm/s, 10mm/s, 15mm/s, 20mm/s, 25mm/s, 30mm/s, 35mm/s, 40mm/s, 45mm/s or 50mm/s, or may be any other value within a range of 5 to 50 mm/s.
Step S120: and drawing the magnesium alloy plate out, enabling the alloy plate to be obliquely sheared and deformed, and then synchronously straightening the plate under the action of traction force.
Referring to fig. 2, specifically, a magnesium alloy ingot is hot extruded through an extruder 10, and a prepared magnesium alloy sheet is drawn by a drawing machine 20. An inclined die 30 is arranged between the extruder 10 and the tractor 20, the magnesium alloy sheet passes through the inclined die 30 when being pulled out, and the inclined die 30 makes the magnesium alloy sheet be inclined, sheared and deformed.
Referring to fig. 4, the oblique shear deformation of the oblique die 30 causes a shear gradient strain to be formed in the passing plate along the direction of the oblique angle, and the plate is coupled to a certain temperature, so that the plate is dynamically recrystallized at the same time to deflect the crystal grains away from the base surface. In addition, the plate is synchronously straightened along with the action of traction force, and the c axis of the crystal grains of the plate is further deflected, so that the texture of the basal plane of the plate is weakened.
Referring to fig. 3, in one embodiment, the tilt die 30 includes an upper die 32 and a lower die 34, and the upper die 32 and the lower die 34 form a passage for the magnesium alloy sheet to pass through, the passage being inclined with respect to a horizontal plane, so that the tilt die 30 tilts and shears the magnesium alloy sheet as the magnesium alloy sheet passes through the tilt die 30. In one embodiment, the angle θ of the tilt die 30 is 3-60 °.
In one embodiment, the angle θ of the tilt module 30 may be 3 °, 9 °, 18 °, 27 °, 30 °, 36 °, 45 °, 54 °, or 60 °, or may be 3-60 °. Any other value within the range.
Step S150: and annealing the magnesium alloy plate.
Specifically, the magnesium alloy sheet is annealed to remove stress, and recrystallization occurs to stabilize the structure. In one embodiment, the parameter conditions for annealing the magnesium alloy sheet material include: the magnesium alloy plate is kept at the temperature of 250-350 ℃ for 1-5 h.
In one embodiment, the annealing temperature may be 250 ℃, 260 ℃, 270 ℃, 280 ℃, 290 ℃, 300 ℃, 310 ℃, 320 ℃, 330 ℃, 340 ℃ or 350 ℃, or any other value within the range of 250 ℃ and 350 ℃. The heat preservation time can be 1h, 2h, 3h, 4h or 5h, and can also be any other value within the range of 1-5 h.
The method for preparing the magnesium alloy plate by the online composite deformation has the advantages that the effect of the inclined die 30 is coupled in the extrusion process, the online local deformation is realized, the strain areas with different degrees are constructed, the shearing strain gradient is generated to induce different orientation effects, the dynamic recrystallization behavior is realized by combining with the partial waste heat after the extrusion of the magnesium alloy plate, the texture and the crystal orientation of the basal plane of the magnesium alloy plate are regulated and controlled, the effect of straightening the plate is realized by utilizing the action of the tractor 20, and the high-performance magnesium alloy plate with different thicknesses can be continuously prepared on line.
In addition, the invention also provides a magnesium alloy plate which is prepared by the method for preparing the magnesium alloy plate through online composite deformation, and the magnesium alloy plate has higher plastic forming capacity.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
Materials: AZ31 magnesium alloy.
Extruding: carrying out hot extrusion on an AZ31 magnesium alloy ingot, wherein the extrusion temperature is 350 ℃, the extrusion ratio is 80, and the extrusion speed is as follows: 10 mm/s.
Local inclined deformation: an inclined die 30 is interposed between the extruder 10 and the haul-off machine 20, and an angle θ of the inclined die 30 is 3 °. During the process of drawing the magnesium alloy sheet by the drawing machine 20, the magnesium alloy sheet passes through the inclined die 30, and the inclined die 30 makes the magnesium alloy sheet obliquely shear-deform.
Annealing: and preserving the heat of the partially inclined plate at 300 ℃ for 1.5 h.
And (4) analyzing results:
example 2
Materials: AZ31 magnesium alloy.
Extruding: carrying out hot extrusion on an AZ31 magnesium alloy ingot, wherein the extrusion temperature is 350 ℃, the extrusion ratio is 100, and the extrusion speed is as follows: 20 mm/s.
Local oblique deformation: an inclined die 30 is interposed between the extruder 10 and the haul-off machine 20, and an angle θ of the inclined die 30 is 30 °. During the process of drawing the magnesium alloy sheet by the drawing machine 20, the magnesium alloy sheet passes through the inclined die 30, and the inclined die 30 makes the magnesium alloy sheet obliquely shear-deform.
Annealing: and preserving the heat of the partially inclined plate at 350 ℃ for 1 h.
Analysis of results
The comparative analysis shows that the tensile strength, yield strength, elongation and formability of the sample subjected to oblique shear deformation are obviously improved compared with those of the original sample, and the plastic forming capability of the magnesium alloy plate is obviously improved.
The above examples are only intended to illustrate the technical solution of the present invention, and 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 (8)
1. The method for preparing the magnesium alloy plate by online composite deformation is characterized by comprising the following steps of:
carrying out hot extrusion on a magnesium alloy ingot to prepare a magnesium alloy plate;
drawing the magnesium alloy plate out, enabling the alloy plate to be obliquely sheared and deformed, and then synchronously straightening the plate under the action of traction force;
and annealing the magnesium alloy plate.
2. The method for preparing the magnesium alloy plate by the online composite deformation according to claim 1, wherein the step of performing hot extrusion on the magnesium alloy ingot to prepare the magnesium alloy plate comprises the following specific steps:
carrying out hot extrusion on the magnesium alloy ingot, wherein the extrusion temperature is 300-450 ℃, the extrusion ratio is 20-150, and the extrusion speed is as follows: 5-50 mm/s.
3. The method for preparing the magnesium alloy plate by the online composite deformation according to claim 1, wherein the magnesium alloy ingot is subjected to hot extrusion through an extruder, the prepared magnesium alloy plate is drawn out through a tractor, and an inclined die is arranged between the extruder and the tractor and enables the magnesium alloy plate to be subjected to inclined shearing deformation.
4. The method for preparing the magnesium alloy sheet material through the online composite deformation according to claim 5, wherein the angle θ of the inclined die is 3-60 °.
5. The method for preparing the magnesium alloy sheet material through the online composite deformation according to claim 1, wherein the step of annealing the magnesium alloy sheet material specifically comprises the following steps:
and (3) preserving the temperature of the magnesium alloy plate for 1-5h at the temperature of 250-350 ℃ to remove stress, generate recrystallization and stabilize the structure.
6. The method for preparing magnesium alloy sheet material by online composite deformation according to claim 1,
carrying out hot extrusion on a magnesium alloy ingot, wherein the extrusion temperature is 350 ℃, the extrusion ratio is 80, and the extrusion speed is as follows: 10 mm/s;
drawing the magnesium alloy plate out, obliquely shearing and deforming the magnesium alloy plate through an inclined die, and then synchronously straightening the plate under the action of traction force; wherein the angle θ of the tilt mode is 3 °;
and (3) preserving the temperature of the magnesium alloy plate for 1.5h at 300 ℃.
7. The method for preparing magnesium alloy sheet material by online composite deformation according to claim 1,
carrying out hot extrusion on a magnesium alloy ingot, wherein the extrusion temperature is 350 ℃, the extrusion ratio is 100, and the extrusion speed is as follows: 20 mm/s;
drawing the magnesium alloy plate out, obliquely shearing and deforming the magnesium alloy plate through an inclined die, and then synchronously straightening the plate under the action of traction force; wherein the angle θ of the tilt mode is 30 °;
and (3) keeping the temperature of the magnesium alloy plate at 350 ℃ for 1 h.
8. A magnesium alloy sheet material, which is characterized by being prepared by the method for preparing the magnesium alloy sheet material through the online composite deformation according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210766026.1A CN115090708B (en) | 2022-06-30 | Magnesium alloy plate and method for preparing magnesium alloy plate by on-line composite deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210766026.1A CN115090708B (en) | 2022-06-30 | Magnesium alloy plate and method for preparing magnesium alloy plate by on-line composite deformation |
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| Publication Number | Publication Date |
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| CN115090708A true CN115090708A (en) | 2022-09-23 |
| CN115090708B CN115090708B (en) | 2024-07-02 |
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| CN115927984A (en) * | 2022-11-28 | 2023-04-07 | 云南大学 | Method for improving room-temperature bending forming performance of magnesium alloy |
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