CN109940094B - Mold and method for regulating and controlling formability of magnesium alloy plate through gradient strain - Google Patents
Mold and method for regulating and controlling formability of magnesium alloy plate through gradient strain Download PDFInfo
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- CN109940094B CN109940094B CN201910315882.3A CN201910315882A CN109940094B CN 109940094 B CN109940094 B CN 109940094B CN 201910315882 A CN201910315882 A CN 201910315882A CN 109940094 B CN109940094 B CN 109940094B
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 82
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 16
- 230000001276 controlling effect Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 5
- 238000000265 homogenisation Methods 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- LQHZJYFIRFRDKF-UHFFFAOYSA-N gold magnesium Chemical compound [Mg].[Au] LQHZJYFIRFRDKF-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
The invention discloses a mold for regulating and controlling the formability of a magnesium alloy plate by gradient strain, which comprises a fixed plate and a clamping plate, wherein the fixed plate and the clamping plate are connected by a connecting plate; the fixing plate consists of a plate A and a plate B, wherein the plate A is fixed with the connecting plate, and the plate B can freely slide along the connecting plate; a strain area for placing the gasket and the magnesium alloy plate is arranged between the plate A and the plate B; the gasket and the magnesium alloy plate are provided with bevel edges with an angle theta, the gasket and the magnesium alloy plate are arranged along the bevel edges in an overlapped mode, and the clamping plate is provided with a fastening bolt used for enabling the clamping plate pressing plate B to move towards the plate A so as to fix the gasket and the magnesium alloy plate. The invention also discloses a method for regulating and controlling the formability of the magnesium alloy plate by gradient strain, which realizes the gradient strain of the magnesium alloy plate by designing the compression gasket with a certain angle, so as to regulate and control the texture orientation of the magnesium alloy plate, weaken the texture and finally improve the formability of the magnesium alloy plate.
Description
Technical Field
The invention belongs to the technical field of alloy reading processing, and particularly relates to a tool and a method for regulating and controlling the formability of a magnesium alloy plate by gradient strain.
Background
The chopstick alloy is used as the lightest metal structure material in the current practical application, and has wide application in the fields of aerospace, transportation, 3C electronic products and the like. Due to a close-packed hexagonal structure (HCP), the read alloy often shows poor room-temperature mechanical property and plastic forming capability, particularly stamping property, and the room-temperature cup bulge value (IE) of a commercial AZ31 magnesium alloy sheet is only about 3mm, so that the popularization and the use of magnesium gold-containing products are severely limited.
Disclosure of Invention
In order to solve the problem of low formability of the conventional commercial magnesium alloy plate, the invention aims to provide a mold and a method for regulating the formability of the magnesium alloy plate by gradient strain.
In order to achieve the above purpose, the following technical solutions are specifically provided:
1. the mold for regulating and controlling the formability of the magnesium alloy plate through gradient strain comprises a fixing plate and a clamping plate, wherein the fixing plate and the clamping plate are connected through a connecting plate;
the fixing plate consists of a plate A and a plate B, wherein the plate A is fixed with the connecting plate, and the plate B can freely slide along the connecting plate; a strain area for placing a gasket and a magnesium alloy plate is arranged between the plate A and the plate B: the gasket and the magnesium alloy plate are provided with bevel edges with an angle theta, and the gasket and the magnesium alloy plate are arranged along the bevel edges in an overlapped mode.
The clamping plate is provided with a fastening bolt for enabling the clamping plate pressing plate B to move towards the plate A so as to fix the gasket and the magnesium alloy plate.
Furthermore, an elastic supporting sheet is arranged between the plate B and the fastening bolt, and the elastic supporting sheet is connected with the plate B through a plurality of supporting blocks.
Furthermore, the connecting plate has 2, places respectively in the both ends of fixed plate and splint.
Further, the value range of the gasket and the magnesium alloy plate theta in the die is 0-60 degrees.
2. A method for regulating and controlling formability of a magnesium alloy plate by gradient strain comprises the following steps:
(1) taking a magnesium gold-containing plate and a gasket with the bevel edge in an angle theta shape, carrying out homogenization annealing treatment on the magnesium alloy plate for 30-120min at the temperature of 300-400 ℃, and then overlapping the gasket and the magnesium alloy plate in a die strain area along the bevel edge; then placing the die on a hydraulic or electronic universal testing machine;
(2) adjusting the fastening bolt, the splint enables the supporting block to evenly extrude the plate B to move towards the plate A through the elastic supporting sheet so as to fix the gasket and the magnesium alloy plate: pre-deforming and compressing along the length direction of the parallel magnesium gold-containing plate by a hydraulic or electronic universal tester at a deformation rate of 10-1-102mm/s；
(3) And (3) preserving the heat of the deformed and compressed magnesium alloy plate for 60-180min at the temperature of 250-400 ℃, thus finishing the strain regulation.
Further, the value range of the gasket and the magnesium alloy plate theta in the method is 0-60 degrees.
The invention has the beneficial effects that: according to the method, the magnesium alloy sheet formability is controlled by designing the mold for controlling the magnesium alloy sheet formability through gradient strain, the magnesium alloy sheet formability is controlled by designing the compression gasket with a certain angle, the texture orientation of the magnesium alloy sheet is controlled, the texture is weakened, and the sheet formability is finally improved.
Drawings
FIG. 1 is a die diagram for regulating magnesium alloy sheet formability by gradient strain:
FIG. 2 is a side view of a gasket and a magnesium alloy sheet material.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:
as shown in fig. 1: the invention discloses a mold for regulating and controlling the formability of a magnesium alloy plate by gradient strain, which comprises a fixing plate l and a clamping plate 3, wherein the fixing plate and the clamping plate are connected by a connecting plate 6: the connecting plate has 2, arranges the both ends of fixed plate and splint respectively in:
the fixing plate is composed of a plate All and a plate B12, wherein the plate All is fixed with the connecting plate, and the plate B12 can freely slide along the connecting plate: a strain area for placing the gasket 2 and the magnesium alloy plate 4 is arranged between the plate All and the plate B12: the gasket and the magnesium alloy plate are provided with bevel edges with an angle theta, the gasket and the magnesium alloy plate are overlapped along the bevel edges, and the value range of theta is 0-60 degrees: the side view of the gasket and magnesium alloy sheet is shown in FIG. 2:
the clamping plate in the die is provided with a fastening bolt 7 which is used for enabling the clamping plate to press the plate B12 to move towards the plate A so as to fix the gasket and the magnesium alloy plate;
in the die, an elastic support sheet 5 is arranged between the plate B12 and the fastening bolt, and the elastic support sheet and the plate B12 are connected by a plurality of support blocks 8.
The invention also discloses a method for regulating and controlling the formability of the magnesium alloy plate by gradient strain, which comprises the following steps:
(1) taking a magnesium alloy plate and a gasket with the bevel edge in an angle theta shape, carrying out homogenization annealing treatment on the magnesium alloy plate for 30-120min at the temperature of 300-400 ℃, and then overlapping the gasket and the magnesium alloy plate along the bevel edge and placing the gasket and the magnesium alloy plate in a strain area of a die: the mold is then placed on a hydraulic or electronic universal tester: the value range of theta is 0-60 degrees;
(2) adjusting fastening bolt 7, splint 3 makes supporting shoe 8 evenly extrude plate B12 through elastic support piece 5 and moves to plate All with fixed gasket 2 and die alloy plate 4: performing predeformation compression along the length direction of the parallel magnesium alloy plate by a hydraulic or electronic universal testing machine, wherein the deformation rate is 10-1-102mm/s；
(3) And (3) preserving the heat of the deformed and compressed magnesium alloy plate for 60-180min at the temperature of 250-400 ℃, thus finishing the strain regulation.
Example 1
(1) Taking an AZ31 magnesium alloy plate with the bevel edge in the shape of an angle of 5 degrees and the size of 100mm (width) multiplied by 100mm (length) multiplied by 1mm (thickness) and a gasket with the bevel edge in the shape of an angle of 5 degrees, carrying out homogenization annealing treatment on the magnesium alloy plate for 60min at the temperature of 300 ℃, and then overlapping the gasket and the magnesium alloy plate in a die strain area along the bevel edge: then placing the die on a hydraulic or electronic universal testing machine;
(2) adjusting fastening bolt 7, splint 3 makes supporting shoe 8 evenly extrude plate B12 through elastic support piece 5 and moves to plate All with fixed gasket 2 and die alloy plate 4: carrying out pre-deformation compression along the length direction of the parallel magnesium alloy plate by a hydraulic or electronic universal testing machine, wherein the deformation rate is 0.lmm/s;
(3) and (3) preserving the heat of the deformed and compressed magnesium alloy plate for 90min at the temperature of 300 ℃, and finishing strain regulation.
The original magnesium alloy sheet and the magnesium alloy sheet after deformation and compression are subjected to performance tests, and the results shown in the table l are obtained:
table 1: performance test data table of original magnesium alloy plate and magnesium alloy plate after deformation compression
| Test specimen | Cupping value (mm) | Plastic strain ratio (r value) |
| Original sample | 2.8 | 1.59 |
| Deformed sample | 6.2 | 0.95 |
Example 2
(1) Taking an AZ31 magnesium alloy plate with the bevel edge in the shape of an angle of 10 degrees and the size of 100mm (width) multiplied by 100mm (length) multiplied by 1mm (thickness) and a gasket with the bevel edge in the shape of an angle of 10 degrees, carrying out homogenization annealing treatment on the magnesium alloy plate for 60min at the temperature of 300 ℃, and then overlapping the gasket and the magnesium alloy plate in a die strain area along the bevel edge; the mold is then placed on a hydraulic or electronic universal testing machine.
(2) Adjusting the fastening bolt 7, the splint 3 makes the supporting block 8 evenly extrude the plate B12 to move towards the plate All through the elastic supporting sheet 5 to fix the gasket 2 and the magnesium alloy plate 4: carrying out predeformation compression along the length direction of the parallel magnesium alloy plate by a hydraulic or electronic universal testing machine, wherein the deformation rate is lmm/s;
(3) and (3) deeply heating the deformed and compressed magnesium alloy plate for 120min at the temperature of 300 ℃, and finishing strain regulation.
The original magnesium alloy sheet and the magnesium alloy sheet after deformation and compression were subjected to performance tests to obtain the results shown in table 2:
table 2: original magnesium alloy sheet material and magnesium alloy suction material performance test data table after deformation compression
| Test specimen | Cupping value (mm) | Plastic strain ratio (r value) |
| Original sample | 2.8 | 1.59 |
| Deformed sample | 7.1 | 0.97 |
From the above tables 1-2 in the examples, it can be concluded that the method of the present invention is used to design gaskets of different angles and matched alloy sheets of the same angle for compressive strain to achieve gradient strain. The grain orientation of the magnesium alloy plate is regulated and controlled by different strain gradients when the magnesium alloy plate is deformed, the formability of the magnesium alloy plate is finally improved, and the cupping value of the deformed sample is far larger than that of the original sample.
Finally, although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art.
Claims (4)
1. The mold for regulating and controlling the formability of the magnesium alloy plate through gradient strain is characterized by comprising a fixing plate and a clamping plate, wherein the fixing plate and the clamping plate are connected through a connecting plate;
the fixing plate consists of a plate A and a plate B, wherein the plate A is fixed with the connecting plate, and the plate B can freely slide along the connecting plate; a strain area for placing the gasket and the magnesium alloy plate is arranged between the plate A and the plate B; the gasket and the magnesium alloy plate are provided with bevel edges in an angle theta shape, and the gasket and the magnesium alloy plate are arranged along the bevel edges in an overlapped mode; the value range of theta is more than 0 and less than or equal to 60 degrees;
the clamping plate is provided with a fastening bolt for enabling the clamping plate pressing plate B to move towards the plate A so as to fix the gasket and the magnesium alloy plate.
2. The mold for regulating and controlling formability of magnesium alloy sheet according to claim 1, wherein an elastic support piece is arranged between the block B and the fastening bolt, and the elastic support piece and the block B are connected by a plurality of support blocks.
3. The mold for regulating formability of magnesium alloy sheet according to claim 1, wherein the connecting plates are 2 pieces, which are respectively disposed at both ends of the fixing plate and the clamping plate.
4. A method for regulating and controlling the formability of a magnesium alloy plate by gradient strain is characterized by comprising the following steps:
(1) taking a magnesium alloy plate and a gasket with the bevel edge in an angle theta shape, carrying out homogenization annealing treatment on the magnesium alloy plate for 30-120min at the temperature of 300-400 ℃, and then overlapping the gasket and the magnesium alloy plate in a die strain area along the bevel edge; then placing the die on a hydraulic or electronic universal testing machine;
(2) adjusting the fastening bolt, and enabling the supporting block to uniformly extrude the plate B to move towards the plate A through the elastic supporting sheet by the clamping plate so as to fix the gasket and the magnesium alloy plate; performing predeformation compression along the length direction of the parallel magnesium alloy plate by a hydraulic or electronic universal testing machine, wherein the deformation rate is 10-1-102mm/s；
(3) Preserving the heat of the deformed and compressed magnesium alloy plate for 60-180min at the temperature of 250-400 ℃, and finishing strain regulation;
the value range of theta is more than 0 and less than or equal to 60 degrees.
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| CN110293166B (en) * | 2019-07-03 | 2021-09-17 | 太原科技大学 | Method and device for preparing texture of plunger pump valve plate |
| CN114277328B (en) * | 2021-12-21 | 2022-06-03 | 重庆大学 | Functional gradient material preparation equipment and method based on eddy current |
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| CN100488653C (en) * | 2007-04-26 | 2009-05-20 | 大连理工大学 | Method for preparing high-temperature-room type plasticity magnesium alloy sheet material |
| CN103255329B (en) * | 2013-05-07 | 2015-08-26 | 宝山钢铁股份有限公司 | A kind of Low-cost fine-grain weak-texture magnesium alloy sheet and manufacture method thereof |
| CN103540881B (en) * | 2013-11-08 | 2015-07-01 | 中南大学 | Processing method for improving drawing and pressing asymmetry of magnesium alloy |
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| CN104492847B (en) * | 2014-10-30 | 2017-02-15 | 重庆大学 | Extruding method for texture-weakened magnesium alloy sheet |
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