CN109468560A - Second phase homogenization regulation preparation method in a kind of high aluminium content casting magnesium alloy plate - Google Patents
Second phase homogenization regulation preparation method in a kind of high aluminium content casting magnesium alloy plate Download PDFInfo
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- CN109468560A CN109468560A CN201910033923.XA CN201910033923A CN109468560A CN 109468560 A CN109468560 A CN 109468560A CN 201910033923 A CN201910033923 A CN 201910033923A CN 109468560 A CN109468560 A CN 109468560A
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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
Abstract
Second phase homogenization regulation preparation method in a kind of high aluminium content casting magnesium alloy plate, this method include that heating ladder solution treatment, the deformation of high temperature multi- pass rolling, the deformation of cooling multi- pass rolling and recrystallization annealing handle Four processes.It by the processing of this method, eliminates in initial tissu and is segregated the second phase up to the net strip of grade size, obtain tiny nearly spherical second phase with even dispersion distribution, while having obtained fine grained texture.The present invention, with commonly rolling the method combined, is implemented accessible in the industrial production using heat treatment.It solves high aluminium content casting magnesium alloy deformation hardly possible, the serious problem of rolling crack, obtains the magnesium alloy sheet material that macro morphology is good, microstructure is uniform, comprehensive performance reaches a standard.
Description
Technical field
The present invention relates to metal material fields, mutually equal more particularly in a kind of high aluminium content casting magnesium alloy plate second
Homogenize regulation preparation method.
Background technique
Magnesium alloy has high specific strength, electric-conductivity heat-conductivity high, high damping shock absorption as most light engineering structure metal material
The advantages that property, high electrostatic screen and good regeneration, in fields such as aerospace, automobile and communications by favor.
However, plastic processing forming difficulty is always to limit magnesium alloy to develop one of most important problem.In addition to intrinsic close of magnesium alloy
It arranges other than hexagonal lattice structure, the size of the second phase and distribution be also an important factor for influencing magnesium alloy Plastic Forming,.
Magnesium plate is the current most potential product of magnesium industry field of deep, produces low cost and high performance magnesium and closes
Golden plate material is one of the main contents studied in the industry.In recent years, melt casting cogging is compared to traditional hot rolling or extrusion blooming etc.
Productivity is high, production cost is low, can scale, commercially produce, obtained relatively broad concern and application.However, such as Fig. 1 and
Shown in Fig. 2, the casting magnesium alloy of high aluminium content would generally generate the second phase of a large amount of segregation, and size is larger, up to millimeter
Grade, mainly in net strip be distributed, this greatly reduces deformability of material during following process, seriously constrain its
Application in industrial production, it is difficult to realize the batch production of thin plate.
Summary of the invention
The purpose of the present invention is to solve the problems of high aluminium content casting magnesium alloy plate plasticity machine-shaping difficulty, and
Second phase homogenization regulation preparation method in a kind of high aluminium content casting magnesium alloy plate is provided, this method using heat treatment with it is general
Logical rolling combines, and application is strong, accessible in implementing in industrial production.Captured high aluminium content casting magnesium alloy deformation it is difficult,
The serious problem of rolling crack obtains the magnesium alloy sheet that macro morphology is good, microstructure is uniform, comprehensive performance reaches a standard
Material.The process is simple and reliable and easy to spread, is widely used in the rolling process of high aluminium content casting magnesium alloy, right
The magnesium alloys such as difficult deformation forging, extruding containing the second phase of high-volume fractional are equally applicable.
The second phase homogenizes regulation method in a kind of high aluminium content casting magnesium alloy plate, comprising the following steps:
(1), heat up ladder solution treatment: the casting magnesium alloy blank progress stage one being dissolved, one solid solubility temperature of stage
It is 300-400 DEG C, soaking time 15-30h, the progress stage two of heating up later is dissolved, which is 350-450
DEG C, soaking time 10-20h obtains the second phase and is sufficiently dissolved blank；
(2), high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out high temperature rolling
Deformation, rolling pass are 4 passages or more, and drafts per pass is 5-30%, overall reduction 60-70%, per pass before
Isothermal treatment for short time 5-30min at a temperature of 300-400 DEG C, rolling processing obtain magnesium alloy plate；
(3), cooling multi- pass rolling deformation: magnesium alloy plate described in step (2) is subjected to cooling rolling deformation, is rolled
Passage is 1 passage or more, draught per pass 10-30%, per pass before in 250-350 DEG C of at a temperature of isothermal treatment for short time 5-
30min, rolling processing obtain the magnesium alloy sheet for comparing that initial blank thickness overall reduction is 70-80%；
(4) recrystallization annealing is handled: it is 100-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 20-200min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
The deformation of the high temperature rolling described in step (2) and the cooling rolling deformation described in step (3) include single
Alternately rolling, both ends alternately rolling and/or the 90 ° of rotary cross rollings of direction rolling, front and back sides.
In the deformation of the high temperature rolling described in step (2) and the cooling rolling deformation described in step (3), roller temperature
It is 100-150 DEG C.
The aluminium content of high aluminium content casting magnesium alloy blank of the present invention is 5-15%.
Beneficial effects of the present invention:
The present invention includes heating ladder solution treatment, the deformation of high temperature multi- pass rolling, the deformation of cooling multi- pass rolling, ties again
Crystalline substance annealing four processes are eliminated in initial tissu and are segregated up to the net strip of grade size by the processing of this method
Second phase obtains tiny nearly spherical second phase with even dispersion distribution, while having obtained fine grained texture.The present invention uses
With commonly rolling the method combined, application is strong, implements in industrial production accessible for heat treatment.Solves high aluminium content casting
Roll that magnesium alloy deformation is difficult, the serious problem of rolling crack, obtain macro morphology is good, microstructure uniformly, comprehensive performance mistake
The magnesium alloy sheet material of pass.
Present invention has the advantage that
1) melt casting cogging is high compared to traditional cogging productivity, production cost is low, can scale, it is with the obvious advantage.So
And casting magnesium alloy would generally generate the second phase of a large amount of segregation, this greatly reduces change of material during following process
Shape ability.About the research of magnesium-aluminum series alloy casting the second phase of plate homogenization, the most methods having proposed at present are only applicable in
The material of Yu Zhong, low-aluminum-content, the method for being applicable to high aluminium content material is relatively fewer, and this method is mainly for high aluminium content
Design of material, effect are very significant；
2) the heating solid solution craft that this method uses, is dissolved the second phase of high-volume fractional sufficiently before rolling deformation, keeps away
The generation for having exempted from rolling initial stage fine crack inhibits the crack propagation in rolling later period from source, is remarkably improved raw material
Yield rate breaches the difficulty of the easy crack at edge of pair rolling, intermediate fracture；
3) the high temperature multi- pass rolling process of this method, isothermal treatment for short time and rolling deformation complement each other, and pass through Thermal-mechanical Coupling
The second phase of segregation is precipitated repeatedly in effect, back dissolving homogenizes high aluminium content casting the second phase of magnesium alloy with playing regulating and controlling effect
Regulating effect is significant, can get tiny nearly spherical second phase of even dispersion distribution；
4) this method joined cooling rolling link in rolling process and also limit while regulating and controlling the second phase morphology
Growing up for crystallite dimension, obtains fine grained texture, improves material room temperature obdurability, and have High-temperature Superplasticity；
5) this method is combined using heat treatment and common rolling, and it is mutually equal to reach high aluminium content casting magnesium alloy plate second
Purpose is homogenized, without harsh environmental requirement and unconventional manufacturing process, may be directly applied in actual production, enterprise's docking
Property is strong, suitable for mass production；
6) this method is suitable for the magnesium alloys such as high aluminium content, the difficult deformable squeeze of the second phase of high-volume fractional, forging simultaneously,
With universality.
Detailed description of the invention
Fig. 1 is the segregation macrograph of high aluminium content casting magnesium alloy.
Fig. 2 is the segregation tissue enlarged photograph of high aluminium content casting magnesium alloy.
Fig. 3 is the uniform formation's photo obtained after preparation method of the present invention processing.
Specific embodiment
Embodiment 1:
(1) heat up ladder solution treatment: the casting ATZ821 magnesium alloy blank progress stage one being dissolved, the stage one solid solution
Temperature is 400 DEG C, and soaking time is that for 24 hours, the progress stage two of heating up later is dissolved, which is 430 DEG C, heat preservation
Time is 16h, obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 10 passage high temperature
Rolling deformation, drafts per pass are 11%, per pass the preceding at a temperature of isothermal treatment for short time 10min at 350 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out 2 passages cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 13%, per pass the preceding at a temperature of isothermal treatment for short time 8min at 300 DEG C, and rolling processing, which obtains, compares initial base
Expect that thickness overall reduction is 80% magnesium alloy sheet；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
Embodiment 2:
(1) heat up ladder solution treatment: the casting ATZ821 magnesium alloy blank progress stage one being dissolved, the stage one solid solution
Temperature is 380 DEG C, soaking time 26h, and the progress stage two of heating up later is dissolved, which is 400 DEG C, heat preservation
Time is 18h, obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 8 passage high temperature
Rolling deformation, drafts per pass are 15%, per pass the preceding at a temperature of isothermal treatment for short time 9min at 380 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out 2 passages cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 13%, per pass the preceding at a temperature of isothermal treatment for short time 6min at 330 DEG C, and rolling processing, which obtains, compares initial base
Expect that thickness overall reduction is 80% magnesium alloy sheet；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
Embodiment 3:
(1) heat up ladder solution treatment: the casting ATZ821 magnesium alloy blank progress stage one being dissolved, the stage one solid solution
Temperature is 350 DEG C, soaking time 28h, and the progress stage two of heating up later is dissolved, which is 450 DEG C, heat preservation
Time is 12h, obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 9 passage high temperature
Rolling deformation, drafts per pass are 12%, per pass the preceding at a temperature of isothermal treatment for short time 20min at 300 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out 3 passages cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 12%, per pass the preceding at a temperature of isothermal treatment for short time 20min at 275 DEG C, and rolling processing, which obtains, compares initially
The magnesium alloy sheet that sotck thinkness overall reduction is 80%；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
Embodiment 4:
(1) heat up ladder solution treatment: the casting ATZ821 magnesium alloy blank progress stage one being dissolved, the stage one solid solution
Temperature is 320 DEG C, soaking time 30h, and the progress stage two of heating up later is dissolved, which is 380 DEG C, heat preservation
Time is 20h, obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 6 passage high temperature
Rolling deformation, drafts per pass are 20%, per pass the preceding at a temperature of isothermal treatment for short time 6min at 390 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out 2 passages cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 14%, per pass the preceding at a temperature of isothermal treatment for short time 25min at 250 DEG C, and rolling processing, which obtains, compares initially
The magnesium alloy sheet that sotck thinkness overall reduction is 80%；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
Embodiment 5:
(1) heat up ladder solution treatment: the casting AZ91 magnesium alloy blank progress stage one being dissolved, the stage solid solubility temperature
It is 400 DEG C, soaking time 20h, the progress stage two of heating up later is dissolved, which is 430 DEG C, and soaking time is
18h obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 10 passage high temperature
Rolling deformation, drafts per pass are 13%, per pass the preceding at a temperature of isothermal treatment for short time 15min at 350 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out 3 passages cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 10%, per pass the preceding at a temperature of isothermal treatment for short time 10min at 310 DEG C, and rolling processing, which obtains, compares initially
The magnesium alloy sheet that sotck thinkness overall reduction is 80%；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
Embodiment 6；
(1) heat up ladder solution treatment: the casting AZ80 magnesium alloy blank progress stage one being dissolved, the stage solid solubility temperature
It is 390 DEG C, soaking time is that for 24 hours, the progress stage two of heating up later is dissolved, which is 415 DEG C, and soaking time is
20h obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 9 passage high temperature
Rolling deformation, drafts per pass are 12%, per pass the preceding at a temperature of isothermal treatment for short time 15min at 330 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out 3 passages cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 10%, per pass the preceding at a temperature of isothermal treatment for short time 10min at 310 DEG C, and rolling processing, which obtains, compares initially
The magnesium alloy sheet that sotck thinkness overall reduction is 80%；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
Embodiment 7:
(1) heat up ladder solution treatment: the casting AT82 magnesium alloy blank progress stage one being dissolved, the stage solid solubility temperature
It is 400 DEG C, soaking time is that for 24 hours, the progress stage two of heating up later is dissolved, which is 420 DEG C, and soaking time is
15h obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 8 passage high temperature
Rolling deformation, drafts per pass are 16%, per pass the preceding at a temperature of isothermal treatment for short time 10min at 370 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out passage cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 8%, per pass the preceding at a temperature of isothermal treatment for short time 5min at 350 DEG C, and rolling processing, which obtains, compares initial base
Expect that thickness overall reduction is 80% magnesium alloy sheet；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
Embodiment 8；
(1) heat up ladder solution treatment: the casting AZ61 magnesium alloy blank progress stage one being dissolved, the stage solid solubility temperature
It is 300 DEG C, soaking time 16h, the progress stage two of heating up later is dissolved, which is 350 DEG C, and soaking time is
15h obtains the second phase and is sufficiently dissolved blank；
(2) high temperature multi- pass rolling deforms: the second phase described in step (1) being sufficiently dissolved blank and carries out 6 passage high temperature
Rolling deformation, drafts per pass are 23%, per pass the preceding at a temperature of isothermal treatment for short time 18min at 300 DEG C, and rolling processing obtains
Obtain magnesium alloy plate；
(3) cooling multi- pass rolling deformation: carrying out 2 passages cooling rolling deformation for magnesium alloy plate described in step (2),
Draught per pass is 15%, per pass the preceding at a temperature of isothermal treatment for short time 25min at 250 DEG C, and rolling processing, which obtains, compares initially
The magnesium alloy sheet that sotck thinkness overall reduction is 80%；
(4) recrystallization annealing is handled: it is 230-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, and the time is
The recrystallization annealing of 60-180min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
By the trades mark magnesium alloy such as casting AZ61, AT82, AZ80, AZ91, ATZ821, at preparation method of the present invention
Reason can get the good magnesium alloy plate of macro morphology.As shown in figure 3, the ATZ821 magnesium of preparation closes after parameter optimization
Fitting has tiny nearly spherical second phase that even dispersion is distributed, and size is about 0.5 μm, and crystallite dimension is about 4 μm.Resist at room temperature
Tensile strength, yield strength and elongation strain amount up to 344MPa, 245MPa and 20%, have room temperature high-strength tenacity, simultaneously respectively
With High-temperature Superplasticity, comprehensive performance is preferable.
Claims (4)
1. in a kind of high aluminium content casting magnesium alloy plate the second phase homogenization regulation preparation method, it is characterised in that: including with
Lower step:
(1), heat up ladder solution treatment: the casting magnesium alloy blank progress stage one being dissolved, which is
300-400 DEG C, soaking time 15-30h, the progress stage two of heating up later is dissolved, which is 350-450
DEG C, soaking time 10-20h obtains the second phase and is sufficiently dissolved blank；
(2), high temperature multi- pass rolling deforms: the second phase described in step (1) is sufficiently dissolved blank and carries out high temperature rolling deformation,
Rolling pass is 4 passages or more, and drafts per pass is 5-30%, overall reduction 60-70%, per pass before in 300-
Isothermal treatment for short time 5-30min at a temperature of 400 DEG C, rolling processing obtain magnesium alloy plate；
(3), magnesium alloy plate described in step (2) cooling multi- pass rolling deformation: is subjected to cooling rolling deformation, rolling pass
More than 1 passage, draught per pass 10-30%, per pass before in 250-350 DEG C of at a temperature of isothermal treatment for short time 5-30min,
Rolling processing obtains the magnesium alloy sheet for comparing that initial blank thickness overall reduction is 70-80%；
(4), recrystallization annealing is handled: it is 100-300 DEG C that magnesium alloy sheet described in step (3), which is carried out temperature, time 20-
The recrystallization annealing of 200min is handled, and obtains tiny nearly spherical second phase with even dispersion distribution and fine grained texture.
2. the second phase homogenization regulation preparation side in a kind of high aluminium content casting magnesium alloy plate according to claim 1
Method, it is characterised in that: cooling rolling deformation includes single described in the deformation of high temperature rolling described in step (2) and step (3)
Alternately rolling, both ends alternately rolling and/or the 90 ° of rotary cross rollings of direction rolling, front and back sides.
3. the second phase homogenization regulation preparation side in a kind of high aluminium content casting magnesium alloy plate according to claim 1
Method, it is characterised in that: in the deformation of high temperature rolling described in step (2) and the cooling rolling deformation described in step (3), roll temperature
Degree is 100-150 DEG C.
4. the second phase homogenization regulation preparation side in a kind of high aluminium content casting magnesium alloy plate according to claim 1
Method, it is characterised in that: the aluminium content of the high aluminium content casting magnesium alloy blank is 5-15%.
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| CN110129697A (en) * | 2019-07-01 | 2019-08-16 | 吉林大学 | A method of the second phase in heating rotation rolling fragmentation and nodularization magnesium alloy |
| CN110129697B (en) * | 2019-07-01 | 2020-05-08 | 吉林大学 | Method for heating, rotating, rolling, crushing and spheroidizing second phase in magnesium alloy |
| CN113649416A (en) * | 2021-07-22 | 2021-11-16 | 吉林大学 | Method for promoting precipitation of second phase of magnesium alloy through multidirectional hot rolling and annealing treatment |
| CN114574742A (en) * | 2022-02-28 | 2022-06-03 | 吉林大学 | Corrosion-resistant weak-texture magnesium alloy for casting and rolling and preparation method thereof |
| CN114574742B (en) * | 2022-02-28 | 2022-11-01 | 吉林大学 | Corrosion-resistant weak texture magnesium alloy for casting and rolling and preparation method thereof |
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