CN105603341B - The method for manufacturing high-ductility/formability wrought magnesium alloy sheet material - Google Patents
The method for manufacturing high-ductility/formability wrought magnesium alloy sheet material Download PDFInfo
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- CN105603341B CN105603341B CN201610078071.2A CN201610078071A CN105603341B CN 105603341 B CN105603341 B CN 105603341B CN 201610078071 A CN201610078071 A CN 201610078071A CN 105603341 B CN105603341 B CN 105603341B
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- 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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
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Abstract
The method for disclosing manufacture high-ductility/formability wrought magnesium alloy sheet material, it includes：A) 2.5 4.5wt.%Zn, 0 0.5wt.%Zr, 0 0.3wt.%Ca, 0 1.6wt.%RE are provided, the total amount of impurity element is less than 0.02wt.%, and surplus is Mg magnesium alloy, one or more of the wherein RE in Y, Gd and Nd；B) magnesium alloy is subjected to low-temp. extrusion, wherein the initial temperature of the magnesium alloy is 200 DEG C of room temperature；C) multi-pass cooling asymmetrical rolling is carried out to the magnesium alloy of the pre-extrusion, wherein accumulation strain amount is 0.8 3.0, and carries out the cold rolling shaping of a time；And d) roll rear magnesium alloy plate to described and directly make annealing treatment, so as to obtain the high-ductility/formability wrought magnesium alloy sheet material.
Description
Technical field
The application relates generally to metal material metallurgy and plastic working field.More specifically, the application is related to manufacture height
The method of plasticity/formability wrought magnesium alloy sheet material.
Background technology
Magnesium alloy has density low, and specific strength, specific stiffness are high, and thermal fatigue, thermal conductivity and damping vibration attenuation performance are good, electromagnetism
The features such as shielding properties and excellent machinability, have in each field such as Aero-Space, marine ship, electronics, machinery, automobile
It is widely applied value.China's Devoting Major Efforts To Developing magnesium alloy industry, not only with powerful resources advantage, also there is huge market
Demand.Scale application of the wrought magnesium alloy sheet material in lightweight structure part field is realized, with extremely important application value
With wide application prospect.
However, at present using traditional magnesium alloy plate of hot rolling technology manufacture, due to its deformation temperature height (>=300
DEG C), pass deformation is small (≤25%), and needs to heat in the middle of repeatedly, causes that technique is complicated, lumber recovery is low, it is difficult to obtain it is low into
This wrought magnesium alloy sheet material.The tissue characteristic of its coarse grains is unfavorable for the raising of sheet material overall performance simultaneously.In addition, sheet material rolls
There is strong { 0002 } basal plane texture afterwards, high-yield-ratio (>=0.8) and low work hardening rate can be caused, this is secondary to sheet material
Formability is totally unfavorable.
Therefore, high-ductility/formability wrought magnesium alloy sheet material manufacturing technology is developed, promotes its industrialization especially in downstream
Metal plate punching molding field scale application, national economy and social development can be met to a certain extent to the wide of lightweight component
General property demand.
The content of the invention
On the one hand, the application is related to the method for manufacture high-ductility/formability wrought magnesium alloy sheet material, and it includes：
A) 2.5-4.5wt.%Zn, 0-0.5wt.%Zr, 0-0.3wt.%Ca, 0-1.6wt.%RE, impurity element are provided
Total amount be less than 0.02wt.%, surplus be Mg magnesium alloy, one or more of the wherein RE in Y, Gd and Nd；
B) magnesium alloy is subjected to low-temp. extrusion, wherein the initial temperature of the magnesium alloy is -200 DEG C of room temperature；
C) multi-pass cooling asymmetrical rolling is carried out to the magnesium alloy of the pre-extrusion, wherein accumulation strain amount is 0.8-3.0,
And carry out the cold rolling shaping of a time；And
D) roll rear magnesium alloy plate to described and directly make annealing treatment, so as to obtain the high-ductility/formability deformation
Magnesium alloy plate.
The method of the manufacture high-ductility of the application/formability wrought magnesium alloy sheet material, by adding appropriate member into magnesium
One or more in plain Zn, Zr, Ca and rare earth element y, Gd and Nd, can refine as-cast grain, after Homogenization Treatments, easily
In magnesium alloy cast blank of the formation with higher solid solubility, while lattice c/a axle ratios are reduced, and through follow-up plastic processing
In and annealing after can form the precipitated phase of tiny, low disperse, sheet fabrication hardening ratio can be improved, when improving sheet material forming
Homogeneous strain degree, so that sheet material plasticity/formability is greatly improved.
The method of the manufacture high-ductility of the application/formability wrought magnesium alloy sheet material, passes through the low temperature of a large extrusion ratio
Extruding, by the microalloying of Ca, RE component element, obtains tiny dynamic recrystallization crystal grain, improves slab rigidity and extension
Rate, while controllable thickness of slab, shortens follow-up Rolling Production flow, reduces production cost.
The method of the manufacture high-ductility of the application/formability wrought magnesium alloy sheet material, by add rare earth element y, Gd and
One or more in Nd, promote non-basal slip during flow to start, and pass through rationally matching somebody with somebody for extruding/asymmetrical rolling dependent variable
Close, greatly reduction sheet material basal plane strong-texture, so as to obtain low yield strength ratio and high work hardening rate.
The method of the manufacture high-ductility of the application/formability wrought magnesium alloy sheet material realizes the weak basal plane texture structure of fine grain
Preparation, make the sheet material that there is excellent temperature-room type plasticity and follow-up secondary forming ability, while also obtaining fine grain, solid solution, disperse analysis
The complex intensifying effect such as go out, show good intensity.
Brief description of the drawings
Fig. 1 is the indicative flowchart of the method for manufacture high-ductility/formability wrought magnesium alloy sheet material of the application.
Embodiment
In the following description, including some concrete details are to provide each disclosed embodiment comprehensive reason
Solution.However, those skilled in the relevant art are not, it will be recognized that use one or more of these concrete details, and use other
Embodiment can be achieved in the case of method, part, material etc..
Unless required in addition that in the disclosure, in entire disclosure and claims, word " comprising " and "comprising" should
It is construed to open, includes the meaning of formula, i.e., " includes but is not limited to ".
" embodiment " mentioned in the whole disclosure or " embodiment " or " in another embodiment " or "
In some embodiments " mean an at least embodiment include it is related to described in the embodiment with specific reference to will
Element, structure or feature.Therefore, in entire disclosure diverse location occur phrase " in one embodiment " or " in embodiment party
In case " or " in another embodiment " or " in certain embodiments " same embodiment need not be all referred to.In addition, specific
Key element, structure or feature can be combined in one or more embodiments in any suitable manner.
Definition
Herein, term " high-ductility/formability " means that magnesium alloy is suitable to plastic working, with good plasticity and two
Secondary crystallized ability, such as plate planar stretch room temperature elongation percentage >=30%, yield tensile ratio (YS/UTS)≤0.70, room temperature Erichsen number IE >=
2.5。
Herein, term " Homogenization Treatments " is meant is incubated 4-12h at 380-425 DEG C, eliminates eutectic structure and subtracts
Slow microsegregation, makes sheet material tissue reach this uniform process.
Herein, term " low-temp. extrusion " means that once big in -200 DEG C of room temperature of magnesium alloy deformation temperature control is squeezed
Pressure ratio (>10) it is plastically deformed, as-cast open grain structure is refined as the fine grain even process of sub-micron crystal tissue.
Herein, term " multi-pass cooling asymmetrical rolling " mean roll neck or roller speed not etc. under the conditions of carry out 2 passages
Rolling above, while control rolls plate deformation temperature and constantly reduces this overall operation of rolling, its different value of central roll speed difference and maximum
The ratio between roller speed is defined as the asynchronous rate of speed.
Herein, term " annealing " system held for some time at the corresponding temperature, lacks for eliminating crystals
Fall into, while playing the effect of certain stable ageing strengthening phase.
Specific embodiment
On the one hand, the application is related to the method for manufacture high-ductility/formability wrought magnesium alloy sheet material, and it includes：
A) 2.5-4.5wt.%Zn, 0-0.5wt.%Zr, 0-0.3wt.%Ca, 0-1.6wt.%RE, impurity element are provided
Total amount be less than 0.02wt.%, surplus be Mg magnesium alloy, one or more of the wherein RE in Y, Gd and Nd；
B) magnesium alloy is subjected to low-temp. extrusion, wherein the initial temperature of the magnesium alloy is -200 DEG C of room temperature；
C) multi-pass cooling asymmetrical rolling is carried out to the magnesium alloy of the pre-extrusion, wherein accumulation strain amount is 0.8-3.0,
And carry out the cold rolling shaping of a time；And
D) roll rear magnesium alloy plate to described and directly make annealing treatment, so as to obtain the high-ductility/formability deformation
Magnesium alloy plate.
In certain embodiments, the composition of magnesium alloy is 2.5-4.5wt.%Zn, 0-0.5wt.%Zr, 0-0.3wt.%
Ca, 0-1.6wt.%RE, surplus are Mg, one or more of the wherein RE in Y, Gd and Nd.Alloying element contains in this alloy
Amount is relatively low, and exists more with solution, and crystal grain is tiny, excellent plasticity, and temperature-room type plasticity and secondary forming performance are substantially better than
Current commercialization wrought magnesium alloy AZ31 and ZK60 etc..
In certain embodiments, the magnesium alloy is manufactured by smelting process.
It can be used in the illustrative examples including but not limited to vacuum induction melting method of the smelting process of the application.
In certain embodiments, pure magnesium, pure zinc are put into stove, under high purity inert gas protection, in about 720-750
DEG C melt and be incubated about 20-30min, be subsequently added Mg-Zr, Mg-Ca and Mg-RE intermediate alloy insulation about 0.75-2h, finally
About 660-680 DEG C is cooled to, about 15-30min is stood, the magnesium alloy is manufactured.
The illustrative examples that can be used in the inert gas of the application include but is not limited to argon gas, helium and nitrogen.
In certain embodiments, method described herein is additionally included in before low temperature pre-extrusion is carried out uniformly to magnesium alloy
The step of changing processing.
In certain embodiments, under inert gas shielding atmosphere, 4-12h progress is incubated at 380-425 DEG C uniform
Change is handled.
In certain embodiments, the extrusion ratio of low-temp. extrusion is about 8-20.
In certain embodiments, the mold preheating temperature of low-temp. extrusion is about 250-350 DEG C.
In certain embodiments, the extruding rate of low-temp. extrusion is about 2-8mm/min.
In certain embodiments, the extrusion ratio of low-temp. extrusion is 8-20, and mold preheating temperature is 250-350 DEG C, extruding
Speed is 2-8mm/min.
In certain embodiments, magnesium alloy is subjected to a low temperature pre-extrusion.
In certain embodiments, the extrusion ratio of a low-temp. extrusion is about 8-20.
In certain embodiments, the mold preheating temperature of a low-temp. extrusion is about 250-350 DEG C.
In certain embodiments, the extruding rate of a low-temp. extrusion is about 2-8mm/min.
In certain embodiments, the rolling speed of multi-pass cooling asymmetrical rolling is about 2-5mm/min.
In certain embodiments, the rate synchronous rate of multi-pass cooling asymmetrical rolling is 0.05-0.20.
In certain embodiments, the strip plate temperature drop scope of multi-pass cooling asymmetrical rolling is about 350-300 DEG C of breaking down, about
260-240 DEG C of finish to gauge.
In certain embodiments, the passage of multi-pass cooling asymmetrical rolling rolls lower amount about 30-45%.
In certain embodiments, the rolling speed of the cold rolling shaping of multi-pass cooling asymmetrical rolling is about 2-5mm/min.
In certain embodiments, the reduction in pass of multi-pass cooling asymmetrical rolling is about 5-10%.
In certain embodiments, the rolling speed of multi-pass cooling asymmetrical rolling is 2-5mm/min, and rate synchronous rate is
0.05-0.20, strip plate temperature drop scope is 350-300 DEG C of breaking down, and 260-240 DEG C of finish to gauge, passage rolls lower amount for 30-45%, cold rolling
The rolling speed of shaping is 2-5mm/min, and reduction in pass is 5-10%.
In certain embodiments, make annealing treatment and annealed for two-stage.
The illustrative examples that can be used in the two-stage annealing of the application include but is not limited to 220-250 DEG C/0.5h+180-
200 DEG C/6h two-stage annealing.
High-ductility/the formability obtained using the method for manufacture high-ductility/formability wrought magnesium alloy sheet material of the application
The average grain size of wrought magnesium alloy sheet material is about 0.7-4 μm.
High-ductility/the formability obtained using the method for manufacture high-ductility/formability wrought magnesium alloy sheet material of the application
The basal plane texture pole density strength of wrought magnesium alloy sheet material is less than 8.0.
High-ductility/the formability obtained using the method for manufacture high-ductility/formability wrought magnesium alloy sheet material of the application
Plate planar stretch elongation percentage >=30% of wrought magnesium alloy sheet material.
High-ductility/the formability obtained using the method for manufacture high-ductility/formability wrought magnesium alloy sheet material of the application
The yield tensile ratio (YS/UTS) of wrought magnesium alloy sheet material is about 0.55-0.70.
High-ductility/the formability obtained using the method for manufacture high-ductility/formability wrought magnesium alloy sheet material of the application
Room temperature Erichsen number IE >=2.5 of wrought magnesium alloy sheet material.
High-ductility/the formability obtained using the method for manufacture high-ductility/formability wrought magnesium alloy sheet material of the application
The plane of wrought magnesium alloy sheet material is each to performance difference≤10%.
The high-ductility of the application/formability wrought magnesium alloy sheet material solves traditional rolled plate temperature-room type plasticity is poor, secondary
The problems such as forming property is poor, can greatly facilitate the application of wrought magnesium alloy sheet material.
Hereinafter, the disclosure by being explained in detail by following examples to more fully understand each side of the disclosure
Face and its advantage.It will be appreciated, however, that following embodiment is the nonrestrictive some realities for being simply used for illustrating the disclosure
Apply scheme.
Embodiment
Embodiment 1
1641g pure magnesium ingots, the pure zinc of 45g are put into vacuum induction melting furnace, under high-purity argon gas protection, at 750 ± 3 DEG C
Melt and be incubated 30min, be subsequently added 12g Mg-30wt.%Zr, 6g Mg-30wt.%Ca, 48g Mg-30wt.%Y, 38g
Mg-30wt.%Gd and 10g Mg-30wt.%Nd intermediate alloys are incubated 2h, are finally cooled to 680 ± 3 DEG C, stand 20min,
Poured into a mould.It is Mg-2.5wt.%Zn-0.2wt.%Zr-0.1wt.%Ca-1.6wt.%RE that composition, which is so made, and size is
Φ 110mm × 85mm magnesium alloy circle ingot casting (size after remove feeders)；425 ± 3 are then carried out under argon atmosphere
DEG C × 12h Homogenization Treatments, with uniform formation, eliminate segregation and solid solution intergranular phase.
Turning removes circle ingot casting surface scale, and cuts into Φ 100mm × 80mm extruding test specimen, pre- at 200 ± 3 DEG C
After hot 0.5h, be once squeezed into 100mm it is wide × 8mm magnesium alloy slab, extrusion ratio is 9.8, and mold preheating temperature is 350 ± 10
DEG C, extrusion speed is 2mm/min.The average grain size of magnesium alloy rod is 3.8 ± 0.5 μm after extruding, and texture is
{ 0002 } the strong fibrous texture of // direction of extrusion.
8mm thickness extruding slabs are heated to carrying out three passages cooling asymmetrical rolling after 350 ± 3 DEG C and are rolled to 2.2mm heavy-gauge sheetings,
Accumulation strain amount is about 1.3, and Rolling roller speed is 5m/min, and the asynchronous rate of speed is 0.05, and reduction in pass is controlled about 35%, is rolled
Temperature processed is followed successively by 350 ° of ± 5C of the first passage, the second 300 ± 10 DEG C of passage, the 3rd 260 ± 10 DEG C of passage, hot-rolled process parameter
It is shown in Table 1；The thick hot rolled plates of 2.2mm are then subjected to the cold rolling shaping of a time to 2mm heavy-gauge sheetings, mill speed is 2mm/min, road
Secondary drafts is 9.1%.
The hot-rolled process parameter of table 1.
| Passage | Thickness of slab change/mm | Reduction in pass/% | Rolling temperature/DEG C |
| 1 | 8→5.6 | 30.0 | 350±5 |
| 2 | 5.6→3.6 | 35.7 | 300±10 |
| 3 | 3.6→2.2 | 38.9 | 260±10 |
250 DEG C/0.5h+200 DEG C/6h annealings are finally carried out to cold rolled sheet.The so obtained thick high-ductilities of 2mm/
Formability wrought magnesium alloy sheet material, its even tissue, crystallite dimension is 1.6 ± 0.3 μm, and basal plane texture is faint, and pole density is strong
Degree about 6.2, plate planar stretch elongation percentage is 34.5%, and yield strength is 184MPa, tensile strength 286MPa, yield tensile ratio (YS/
UTS it is about) 0.64, room temperature Erichsen number IE is about 3.2.
Embodiment 2
1671g pure magnesium ingots, the pure zinc of 27g are put into vacuum induction melting furnace, under high-purity argon gas protection, at 730 ± 3 DEG C
Melt and be incubated 30min, be subsequently added 30g Mg-30wt.%Zr, 12g Mg-30wt.%Ca, 30g Mg-30wt.%Y, 24g
Mg-30wt.%Gd and 6g Mg-30wt.%Nd intermediate alloys are incubated 1.0h, are finally cooled to 675 ± 3 DEG C, stand 20min,
Poured into a mould.Composition Mg-1.5wt.%Zn-0.5wt.%Zr-0.2wt.%Ca-1.0wt.%RE is so made, size is Φ
110mm × 85mm magnesium alloy circle ingot casting (size after remove feeders)；400 ± 3 DEG C are then carried out under argon atmosphere
× 8h Homogenization Treatments, with uniform formation, eliminate segregation and solid solution intergranular phase.
Turning removes circle ingot casting surface scale, and cuts into Φ 100mm × 80mm extruding test specimen, pre- at 200 ± 3 DEG C
After hot 0.5h, be once squeezed into 100mm it is wide × 6mm magnesium alloy slab, extrusion ratio is 13, and mold preheating temperature is 250 ± 10
DEG C, extrusion speed is 4mm/min.The average grain size of magnesium alloy rod is 2.9 ± 0.5 μm after extruding, and texture is
{ 0002 } the strong fibrous texture of // direction of extrusion.
6mm thickness extruding slabs are heated to progress twice time cooling asymmetrical rolling after 300 ± 3 DEG C and are rolled to 2.2mm heavy-gauge sheetings,
Accumulation strain amount is about 1.0, and Rolling roller speed is 5m/min, and the asynchronous rate of speed is 0.10, and reduction in pass control about 40% is rolled
Temperature processed is followed successively by 300 ° of ± 5C of the first passage, the second 250 ± 10 DEG C of passage, and hot-rolled process parameter is shown in Table 2；Then by 2.2mm
Thick hot rolled plate carries out the cold rolling shaping of a time to 2mm heavy-gauge sheetings, and mill speed is 2mm/min, and reduction in pass is 9.1%.
The hot-rolled process parameter of table 2.
| Passage | Thickness of slab change/mm | Reduction in pass/% | Rolling temperature/DEG C |
| 1 | 6→3.8 | 36.7 | 300±5 |
| 2 | 3.8→2.2 | 42 | 250±10 |
230 DEG C/0.5h+180 DEG C/6h annealings are finally carried out to cold rolled sheet.The so obtained thick high-ductilities of 2mm/
Formability wrought magnesium alloy sheet material, its even tissue, crystallite dimension is 1.5 ± 0.3 μm, and basal plane texture is faint, and pole density is strong
Degree about 7.4, plate planar stretch elongation percentage 36.4%, yield strength is 148MPa, and tensile strength is 264MPa, yield tensile ratio (YS/
UTS it is about) 0.56, room temperature Erichsen number IE is about 3.5.
Although from the foregoing it is appreciated that describing specific embodiments of the present invention for the purpose of exemplary illustration,
But under condit without departing from the spirit and scope of the present invention, technical staff described in this area can make various modifications or change
Enter.These deformations or modification should all fall into the application scope of the following claims.
Claims (17)
1. manufacturing the method for high-ductility/formability wrought magnesium alloy sheet material, it includes：
A) provide 2.5-4.5wt.%Zn, 0-0.5wt.%Zr, 0-0.3wt.%Ca, 0-1.6wt.%RE, impurity element it is total
Amount is less than 0.02wt.%, and surplus is Mg magnesium alloy, one or more of the wherein RE in Y, Gd and Nd；
B) by the magnesium alloy carry out low-temp. extrusion, wherein the initial temperature of the magnesium alloy be room temperature to 200 DEG C；
C) multi-pass cooling asymmetrical rolling is carried out to the magnesium alloy of the extruding, wherein accumulation strain amount is 0.8-3.0, and is carried out
The cold rolling shaping of a time；And
D) roll rear magnesium alloy plate to described and directly make annealing treatment, closed so as to obtain the high-ductility/formability deformed Mg
Golden plate material.
2. the method as described in claim 1, wherein by smelting process, manufacturing the magnesium alloy.
3. method as claimed in claim 2, wherein the smelting process is vacuum induction melting method.
4. the method as described in claim 1, wherein pure magnesium, pure zinc are put into stove, under high-purity argon gas protection, in 720-
750 DEG C melt and are incubated 20-30min, are subsequently added Mg-Zr, Mg-Ca and Mg-RE intermediate alloy insulation 0.75-2h, finally
660-680 DEG C is cooled to, 15-30min is stood, the magnesium alloy is manufactured.
5. the method as described in claim 1, it is additionally included in before low-temp. extrusion carries out Homogenization Treatments to the magnesium alloy
Step.
6. method as claimed in claim 5, wherein under inert gas shielding atmosphere, insulation 4-12h enters at 380-425 DEG C
The row Homogenization Treatments.
7. the extrusion ratio of the method as described in any claim in claim 1 to 6, wherein low-temp. extrusion is 8-20, mould
Preheating temperature is 250-350 DEG C, and extruding rate is 2-8mm/min.
The rolling speed of asymmetrical rolling 8. the method as described in any claim in claim 1 to 6, wherein multi-pass cool
For 2-5mm/min, rate synchronous rate is 0.05-0.20, and strip plate temperature drop scope is 350-300 DEG C of breaking down, 260-240 DEG C of finish to gauge,
Passage rolls lower amount for 30-45%, and the rolling speed of cold rolling shaping is 2-5mm/min, and reduction in pass is 5-10%.
9. the rolling speed of method as claimed in claim 7, wherein multi-pass cooling asymmetrical rolling is 2-5mm/min, speed
Asynchronous rate is 0.05-0.20, and strip plate temperature drop scope is 350-300 DEG C of breaking down, and 260-240 DEG C of finish to gauge, passage rolls lower amount for 30-
45%, the rolling speed of cold rolling shaping is 2-5mm/min, and reduction in pass is 5-10%.
10. the method as described in any claim in claim 1 to 6, wherein annealing is two-stage annealing.
11. method as claimed in claim 10, wherein the two-stage is annealed into 220-250 DEG C/0.5h+180-200 DEG C/6h's
Two-stage is annealed.
12. method as claimed in claim 7, wherein annealing is two-stage annealing.
13. method as claimed in claim 12, wherein the two-stage is annealed into 220-250 DEG C/0.5h+180-200 DEG C/6h's
Two-stage is annealed.
14. method as claimed in claim 8, wherein annealing is two-stage annealing.
15. method as claimed in claim 14, wherein the two-stage is annealed into 220-250 DEG C/0.5h+180-200 DEG C/6h's
Two-stage is annealed.
16. method as claimed in claim 9, wherein annealing is two-stage annealing.
17. method as claimed in claim 16, wherein the two-stage is annealed into 220-250 DEG C/0.5h+180-200 DEG C/6h's
Two-stage is annealed.
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| CN109554645B (en) * | 2017-09-25 | 2021-04-13 | 中国宝武钢铁集团有限公司 | Room-temperature super-formability magnesium or magnesium alloy and manufacturing method thereof |
| CN107740016B (en) * | 2017-10-20 | 2019-05-10 | 西北工业大学 | The preparation process of high-performance deformation magnesium-based composite material extruded bars and cold rolled sheet |
| CN112048687A (en) * | 2020-09-15 | 2020-12-08 | 贵州大学 | Preparation method of ultrafine crystal magnesium alloy with multi-scale microstructure |
| CN112746210B (en) * | 2021-02-01 | 2021-10-12 | 太原理工大学 | Multi-element microalloyed magnesium alloy, preparation method thereof and plate extrusion forming process |
| CN113235027B (en) * | 2021-05-21 | 2021-12-10 | 重庆理工大学 | Deformed magnesium alloy plate with good matching of strength and plasticity and preparation method thereof |
| CN113444945B (en) * | 2021-07-02 | 2022-04-26 | 云南大学 | High-plasticity high-formability magnesium alloy plate with annular divergent texture and preparation method thereof |
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| CN101857933B (en) * | 2009-04-10 | 2012-05-23 | 中国科学院金属研究所 | Hot rolling process of high-plasticity and low-anisotropy magnesium alloy and sheet thereof |
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