CN106676357A - High-plasticity magnesium alloy and preparation method thereof - Google Patents
High-plasticity magnesium alloy and preparation method thereof Download PDFInfo
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- CN106676357A CN106676357A CN201710039520.7A CN201710039520A CN106676357A CN 106676357 A CN106676357 A CN 106676357A CN 201710039520 A CN201710039520 A CN 201710039520A CN 106676357 A CN106676357 A CN 106676357A
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- alloy
- magnesium alloy
- magnesium
- ingot
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
The invention discloses a high-plasticity magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 3-4% of Zn, 0.1-0.6% of Ca, 0.05-0.8% of Mn, and the balance of Mg and inevitable impurities. Ca and Mn are added in a magnesium zinc alloy to prominently refine alloy grains; in hot extrusion process, the dynamic recrystallization can be promoted to stop growth of recrystallized grains, so that the strength and the plasticity of the alloy are synchronously improved, the base surface texture of the alloy can be prominently weakened, and the plasticity of the alloy is improved; in addition, through separation of a second phase and dispersion and separation of nanoscale Mn particles, the strength of the alloy can be effectively improved; the magnesium alloy is high in plasticity; and the component-optimized alloy can reach the ductility of 25-29.8%, the yield strength of 160-205 MPa and the tensile strength of 270-289 MPa.
Description
Technical field
The present invention relates to metal material field, more particularly to a kind of high-ductility Mg-Zn-Ca-Mn magnesium alloy and its preparation side
Method.
Background technology
Magnesium alloy has that density is low, specific strength is high, specific stiffness is high, and good casting property, damping property are good, capability of electromagnetic shielding
It is high, be easy to machining and it is recyclable many advantages, such as, be structural metallic materials most light in current commercial Application.Automobile,
Electronics, electrical equipment, traffic, Aero-Space and national defence, military industry field have extremely important using value and wide application prospect.
Especially in terms of lightweight, with the significant advantage for being difficult to substitute, can substantially mitigate weight, save fuel consumption.However, magnesium
Crystal structure be close-packed hexagonal, slip system is few, and deformation is mainly by basal slip and the twin realization of the conical surface, plastic deformation ability
Power is poor, and absolute intensity is low, greatly limit its range of application on structural member.
At present, the main method for improving magnesium alloy combination property is addition alloying element.Research shows, by magnesium matrix
Middle addition rare earth alloy element, can put forward heavy alloyed quality and performance, add rare earth to be to improve alloy in traditional magnesium alloy
One of effective way of performance, but rare earth is expensive, it would be desirable to using price, less expensive unit usually substitutes.Numerous researchs
Show, in the magnesium alloy, Ca has a characteristics of many similar rare earth elements, such as crystal grain thinning, reduction basal plane texture, improve anti-corrosion
Property, strengthen high-temperature stability, improve creep-resistant property etc..Ca elements belong to active alkaline earth element, and magnesium is congenerss, and it melts
Point is 839 DEG C, and close with the fusing point of magnesium, density is 1.54g/cm3, with density is low, price is low compared with other alloying elements
Honest and clean the advantages of.Consider from many aspects, Ca is more satisfactory alloy element for magnesium alloy.And the addition energy of Mn
The microstructure of notable refinement wrought magnesium alloy, also, the current potential of alloy substrate can be significantly improved, be conducive to alloy corrosion resistance
The raising of energy.
In sum, deformed magnesium alloy material is a kind of metal material of great development prospect, especially low cost, Gao Zong
Closing performance magnesium alloy can be applied to a large amount of commercial production.But reported added by compound on the basis of Mg-Zn systems at present
Plus Ca and Mn is little to improve the method for wrought magnesium alloy plastic deformation ability, patent and application.Simple production process, cost are not
The high and magnesium alloy with more high-ductility remains a need for exploring.
The content of the invention
For deficiencies of the prior art, it is an object of the invention to provide a kind of high plastic magnesium alloy, while this
Invention additionally provides the preparation method of the magnesium alloy.
For achieving the above object, the present invention is adopted the following technical scheme that：A kind of high-ductility Mg-Zn-Ca-Mn magnesium alloy, by
The component composition of following weight/mass percentage composition：Zn3 ~ 4%, Ca0.1 ~ 0.6%, Mn0.05 ~ 0.8%, remaining is for Mg and inevitably
Impurity.
Further, the high-ductility Mg-Zn-Ca-Mn magnesium alloy preparation method of the component, comprises the steps：
（1）Alloy smelting and casting：It is 1 in volume ratio:99 SF6And CO2Under gas shield, magnesium ingot is put in crucible and is melted
Change, after pure zinc, Mg-30%Ca intermediate alloys, Mg-3%Mn intermediate alloys are preheated 15 ~ 30 minutes at 140 ~ 220 DEG C, add fusing
Magnesium ingot in, plus it is fashionable should rapidly by pure zinc, Mg-30%Ca intermediate alloys and Mg-3%Mn intermediate alloys be pressed into liquid level below, treat
Stir 2 ~ 5 minutes after fusing, make composition uniform, stand 10 ~ 15 minutes, after standing is finished, salvage dross on surface of fusant, treat temperature
When dropping to 710 ~ 730 DEG C, ingot casting is poured in the mould that melt is poured into 250 ~ 350 DEG C, taken from mould after ingot solidification
Go out, cool down in input cold water；
（2）Machining：According to the size of extruder recipient by above-mentioned ingot casting sawing, railway carriage to suitable dimension；
（3）Homogenization Treatments：Ingot casting is coated with graphite powder, 22 ~ 24h is incubated at 330 ~ 370 DEG C, 410 ~ 450 are warming up to afterwards
DEG C insulation 10 ~ 12h, water-cooled is to room temperature after taking-up；
（4）Hot extrusion：The ingot casting and extrusion die after Homogenization Treatments is preheated 1 ~ 2 hour at 300 ~ 330 DEG C before extruding, extruding
Temperature is 300 ~ 330 DEG C, and extrusion ratio is 25:1, extruding rate is 0.8 ~ 1m/min.
Compared to existing technology, the present invention has the advantages that：
1st, the present invention produces obvious Grain Refinement Effect by addition Ca and Mn, makes the obdurability of alloy while being improved；
And Ca can weaken the basal plane texture of alloy, the plasticity of material is lifted.Only need to add a small amount of Ca and Mn, just can be significantly
Alloy and plasticity and intensity are improved, cost of material is relatively low.
2nd, magnesium alloy of the present invention has high-ductility, and the alloy elongation percentage after optimizing components can reach 25 ~ 29.8%, and surrender is strong
Spend for 160 ~ 205 MPa, tensile strength is 270 ~ 289MPa.Its strengthening and toughening mechanism of is：Ca and Mn energy is added in magnesium-zinc alloy
Notable refining alloy crystal grain, and promote the generation of dynamic recrystallization in hot extrusion process, growing up for recrystal grain is prevented,
So as to improve the intensity and plasticity of alloy simultaneously；The basal plane texture of alloy can also be significantly weakened, improves the plasticity of alloy；Other
The precipitation of two-phase and nano level Mn particle dispersions are separated out, and can effectively improve the intensity of alloy.
3rd, present invention process is simple, only need to once be extruded, it is not necessary to complicated processing technique, and setting of being adopted
Standby such as smelting furnace, heat extruder is conventional common apparatus, with it is portable by force the characteristics of, be easy to realize in the industry.
Description of the drawings
Fig. 1 is the microstructure photo of magnesium alloy prepared by embodiment 1；
Fig. 2 is the microstructure photo of magnesium alloy prepared by embodiment 2；
Fig. 3 is the microstructure photo of magnesium alloy prepared by embodiment 3；
Fig. 4 is the microstructure photo of magnesium alloy prepared by embodiment 4；
Fig. 5 is that engineering stress-strain curve is stretched under magnesium alloy room temperature prepared by embodiment 1 ~ 4.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail with specific embodiment.
Embodiment 1
The present embodiment high plastic magnesium alloy is made up of the component of following weight/mass percentage composition：Zn3.75%, Ca0.21%, Mn0.15%,
Balance of Mg and inevitable impurity.
The preparation method of the high plastic magnesium alloy of said components is as follows：
（1）Alloy smelting and casting：Got the raw materials ready according to above-mentioned magnesium alloy component content, raw materials be technical pure magnesium ingot,
Pure zinc, Mg-30%Ca intermediate alloys, Mg-3%Mn intermediate alloys, are 1 in volume ratio:99 SF6+CO2Under gas shield, by magnesium ingot
It is put in crucible after fusing, adds by the alloying component proportional quantity and closed in the middle of pure zinc, Mg-30%Ca intermediate alloys, Mg-3%Mn
Gold, before addition should 140 ~ 220 DEG C preheat 15 ~ 30 minutes, plus it is fashionable should be pressed into rapidly below liquid level, it is to be melted after stir
Mix 2 ~ 5 minutes, make composition uniform, stand 10 ~ 15 minutes；After standing is finished, salvage dross on surface of fusant, treat temperature drop to 710 ~
When 730 DEG C, melt is poured in 250 ~ 350 DEG C of moulds and pours into ingot casting, be removed from the molds after ingot solidification, put into cold water
Middle cooling；
（2）Machining：According to the size of extruder recipient by above-mentioned ingot casting sawing, railway carriage to suitable dimension；
（3）Homogenization Treatments：Ingot casting is coated with graphite powder, 22 ~ 24h is incubated at 330 ~ 370 DEG C, 410 ~ 450 are warming up to afterwards
DEG C insulation 10 ~ 12h, water-cooled is to room temperature after taking-up；
（4）Hot extrusion：The ingot casting and extrusion die after Homogenization Treatments is preheated 1 ~ 2 hour at 300 DEG C ~ 330 DEG C before extruding, is squeezed
Pressure temperature is 300 DEG C ~ 330 DEG C, and extrusion ratio is 25:1, extruding rate is 0.8 ~ 1m/min, and room temperature, this enforcement are air cooled to after extruding
Example extruding gained magnesium alloy rod specification is Φ 16.
Embodiment 2
The present embodiment high plastic magnesium alloy is made up of the component of following weight/mass percentage composition：Zn3.59%, Ca0.20%, Mn0.25%,
Balance of Mg and inevitable impurity, preparation method is with embodiment 1.
Embodiment 3
The present embodiment high plastic magnesium alloy is made up of the component of following weight/mass percentage composition：Zn3.68%, Ca0.21%, Mn0.65%,
Balance of Mg and inevitable impurity, preparation method is with embodiment 1.
Embodiment 4
The present embodiment high plastic magnesium alloy is made up of the component of following weight/mass percentage composition：Zn3.62%, Ca0.47%, Mn0.12%,
Balance of Mg and inevitable impurity, preparation method is with embodiment 1.
Performance detection：
1st, microstructure detection
Fig. 1, Fig. 2, Fig. 3, Fig. 4 are respectively embodiment 1, embodiment 2, embodiment 3, the extruded Magnesium Alloy metallograph of embodiment 4,
From Fig. 1 ~ 4 as can be seen that with the increase of Mn contents, recrystal grain is gradually refined, and reason is occurrence dynamics in extrusion process
Recrystallization, formation can be with pinning crystal boundary, the Ca of crystal grain thinning2Mg6Zn3With Mn particles, second mutually gradually increases, its thinning effect
Become apparent from.
2nd, Mechanics Performance Testing
Fig. 5 is the room temperature tensile engineering stress strain figure of the extruded Magnesium Alloy of embodiment 1 ~ 4.
Table 1 is the room-temperature mechanical property test result of the extruded Magnesium Alloy of embodiment 1 ~ 4.
The room-temperature mechanical property of magnesium alloy materials prepared by 1 embodiment of table 1 ~ 4
| Alloy is numbered | Yield strength（MPa） | Tensile strength（MPa） | Elongation percentage（%） |
| Embodiment 1 | 165 | 270 | 29.8 |
| Embodiment 2 | 196 | 276 | 26.0 |
| Embodiment 3 | 206 | 289 | 25.6 |
| Embodiment 4 | 213 | 279 | 23.8 |
From Fig. 2 and Biao 1 it can be seen that with the increase of Mn contents, the yield strength of alloy is increased dramatically, tensile strength
It is highly improved, and elongation percentage is declined slightly.Crystal grain significantly refinement and basal plane texture attenuation cause the plasticity of the series alloy
Deformability is increased substantially.Generally speaking, alloy of the invention has high plasticity, and can guarantee that higher intensity.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (3)
1. a kind of high-ductility Mg-Zn-Ca-Mn magnesium alloy, it is characterised in that be made up of the component of following weight/mass percentage composition：Zn3
~ 4%, Ca0.1 ~ 0.6%, Mn0.05 ~ 0.8%, remaining is Mg and inevitable impurity.
2. high-ductility Mg-Zn-Ca-Mn magnesium alloy according to claim 1, it is characterised in that by following weight/mass percentage composition
Component composition：Zn3.75%, Ca0.21%, Mn0.15%, remaining is Mg and inevitable impurity.
3. such as the preparation method of the arbitrary high-ductility Mg-Zn-Ca-Mn magnesium alloy of claim 1 to 2, it is characterised in that including as follows
Step：
（1）Alloy smelting and casting：It is 1 in volume ratio:99 SF6And CO2Under gas shield, magnesium ingot is put in crucible and is melted,
After pure zinc, Mg-30%Ca intermediate alloys, Mg-3%Mn intermediate alloys are preheated 15 ~ 30 minutes at 140 ~ 220 DEG C, fusing is added
In magnesium ingot, plus it is fashionable should rapidly by pure zinc, Mg-30%Ca intermediate alloys and Mg-3%Mn intermediate alloys be pressed into liquid level below, it is fusion
Stir 2 ~ 5 minutes after change, make composition uniform, stand 10 ~ 15 minutes, after standing is finished, salvage dross on surface of fusant, treat that temperature drops
During to 710 ~ 730 DEG C, ingot casting is poured in the mould that melt is poured into 250 ~ 350 DEG C, is removed from the molds after ingot solidification,
Cool down in input cold water；
（2）Machining：According to the size of extruder recipient by above-mentioned ingot casting sawing, railway carriage to suitable dimension；
（3）Homogenization Treatments：Ingot casting is coated with graphite powder, 22 ~ 24h is incubated at 330 ~ 370 DEG C, 410 ~ 450 are warming up to afterwards
DEG C insulation 10 ~ 12h, water-cooled is to room temperature after taking-up；
（4）Hot extrusion：The ingot casting and extrusion die after Homogenization Treatments is preheated 1 ~ 2 hour at 300 ~ 330 DEG C before extruding, extruding
Temperature is 300 ~ 330 DEG C, and extrusion ratio is 25:1, extruding rate is 0.8 ~ 1m/min.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118225A (en) * | 2017-11-28 | 2018-06-05 | 重庆科技学院 | A kind of low cost high-voltage contracting strength and deformation magnesium alloy and preparation method thereof |
| CN108425056A (en) * | 2018-05-03 | 2018-08-21 | 重庆大学 | A kind of room temperature high plastic magnesium alloy and preparation method thereof containing rare-earth yttrium |
| CN108517447A (en) * | 2018-05-03 | 2018-09-11 | 重庆大学 | A kind of high plastic magnesium alloy and preparation method thereof |
| CN108950337A (en) * | 2018-08-07 | 2018-12-07 | 重庆大学 | A kind of low-cost high-strength Mg-Zn-Y-Ce-Ca magnesium alloy and preparation method thereof |
| CN109252117A (en) * | 2018-11-20 | 2019-01-22 | 北京工业大学 | A kind of degradable bone implant magnesium alloy and preparation method thereof |
| CN112746209A (en) * | 2021-02-01 | 2021-05-04 | 太原理工大学 | Preparation method of high-plasticity thermal deformation rare earth magnesium alloy |
| CN114214549A (en) * | 2021-12-17 | 2022-03-22 | 重庆大学 | Rare earth-free low-cost high-plasticity magnesium alloy and preparation method thereof |
| CN114411030A (en) * | 2022-01-21 | 2022-04-29 | 重庆大学 | High-plasticity magnesium alloy and preparation method thereof |
| CN115627397A (en) * | 2022-10-24 | 2023-01-20 | 云南电网有限责任公司电力科学研究院 | Magnesium alloy and preparation method thereof |
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| CN106148784A (en) * | 2015-04-20 | 2016-11-23 | 中国科学院金属研究所 | A kind of low cost room temperature high-ductility wrought magnesium alloy material and preparation technology thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118225A (en) * | 2017-11-28 | 2018-06-05 | 重庆科技学院 | A kind of low cost high-voltage contracting strength and deformation magnesium alloy and preparation method thereof |
| CN108425056A (en) * | 2018-05-03 | 2018-08-21 | 重庆大学 | A kind of room temperature high plastic magnesium alloy and preparation method thereof containing rare-earth yttrium |
| CN108517447A (en) * | 2018-05-03 | 2018-09-11 | 重庆大学 | A kind of high plastic magnesium alloy and preparation method thereof |
| CN108950337A (en) * | 2018-08-07 | 2018-12-07 | 重庆大学 | A kind of low-cost high-strength Mg-Zn-Y-Ce-Ca magnesium alloy and preparation method thereof |
| CN108950337B (en) * | 2018-08-07 | 2020-06-23 | 重庆大学 | Low-cost high-strength Mg-Zn-Y-Ce-Ca magnesium alloy and preparation method thereof |
| CN109252117A (en) * | 2018-11-20 | 2019-01-22 | 北京工业大学 | A kind of degradable bone implant magnesium alloy and preparation method thereof |
| CN112746209A (en) * | 2021-02-01 | 2021-05-04 | 太原理工大学 | Preparation method of high-plasticity thermal deformation rare earth magnesium alloy |
| CN112746209B (en) * | 2021-02-01 | 2021-10-22 | 太原理工大学 | Preparation method of high-plasticity thermal deformation rare earth magnesium alloy |
| CN114214549A (en) * | 2021-12-17 | 2022-03-22 | 重庆大学 | Rare earth-free low-cost high-plasticity magnesium alloy and preparation method thereof |
| CN114411030A (en) * | 2022-01-21 | 2022-04-29 | 重庆大学 | High-plasticity magnesium alloy and preparation method thereof |
| CN115627397A (en) * | 2022-10-24 | 2023-01-20 | 云南电网有限责任公司电力科学研究院 | Magnesium alloy and preparation method thereof |
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