CN107326235B - A kind of high-strength Mg-Zn-Al series deformation magnesium alloys and preparation method thereof containing Cu - Google Patents
A kind of high-strength Mg-Zn-Al series deformation magnesium alloys and preparation method thereof containing Cu Download PDFInfo
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- CN107326235B CN107326235B CN201710597942.6A CN201710597942A CN107326235B CN 107326235 B CN107326235 B CN 107326235B CN 201710597942 A CN201710597942 A CN 201710597942A CN 107326235 B CN107326235 B CN 107326235B
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 104
- 229910007570 Zn-Al Inorganic materials 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000011777 magnesium Substances 0.000 claims abstract description 47
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 38
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 6
- 239000005030 aluminium foil Substances 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims description 38
- 239000011701 zinc Substances 0.000 claims description 24
- 210000002966 Serum Anatomy 0.000 claims description 15
- 229910052725 zinc Inorganic materials 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 13
- 239000004411 aluminium Substances 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 238000001192 hot extrusion Methods 0.000 claims description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 238000000265 homogenisation Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 238000010792 warming Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 5
- 210000003491 Skin Anatomy 0.000 claims description 4
- 238000007499 fusion processing Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims 6
- 238000003754 machining Methods 0.000 claims 2
- 239000000956 alloy Substances 0.000 abstract description 26
- 229910045601 alloy Inorganic materials 0.000 abstract description 22
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000005755 formation reaction Methods 0.000 abstract description 2
- 238000001953 recrystallisation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910021323 Mg17Al12 Inorganic materials 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 229910052726 zirconium Inorganic materials 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- -1 zirconium magnesium Chemical compound 0.000 description 2
- 229910018137 Al-Zn Inorganic materials 0.000 description 1
- 229910018573 Al—Zn Inorganic materials 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C22F1/008—Using a protective surface layer
-
- 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 present invention relates to a kind of high-strength Mg-Zn-Al series deformation magnesium alloys and preparation method thereof containing Cu, belong to magnesium alloy technical field, the magnesium alloy is by mass percentage, composed of the following components：Zn：5.5-6.5%, Al：2.5-3.5%, Cu：0.1-2.1%, inevitable impurity≤0.15%, surplus are magnesium.By the Cu elements for adding 0.1-2.1% into magnesium alloy so that the low melting point β-Mg of continuous net-shaped distribution17Al12The high-melting-point MgAlCu ternary phases of small and dispersed distribution are mutually gradually converted into, β-Mg are weakened17Al12The formation of phase, not only increases the mechanical property of alloy, also allows alloy that can be on active service at higher temperatures, wherein MgAlCu ternary phases can effectively hinder growing up for crystal grain in Dynamic Recrystallization, and the crystallite dimension of final As-extruded is about 2 μm.The preparation method of the magnesium alloy is easy to implement, and time-consuming short, to the of less demanding of equipment, and production cost is low, wherein first being covered with graphite powder when being homogenized to magnesium alloy, is then wrapped up again with aluminium foil, can avoid alloy superheat or burning well.
Description
Technical field
The invention belongs to magnesium alloy technical fields, are related to a kind of high-strength Mg-Zn-Al series deformation magnesium alloys and its system containing Cu
Preparation Method.
Background technology
In view of magnesium alloy has excellent comprehensive performance, and with the getting worse of energy crisis and environmental problem,
Exploitation for magnesium alloy as lightweight structural material has become very urgent.Whether contain zirconium according to magnesium alloy, it can be by magnesium alloy
It is divided into magnesium alloy containing zirconium and is free of zirconium magnesium alloy.The usual crystal grain of magnesium alloy containing zirconium is tiny, has good mechanical property.But zirconium member
Element is expensive, improves production cost, is unfavorable for the mass production of the magnesium alloy containing zirconium.In addition, in order to improve magnesium alloy
Obdurability, generally use deformation processing technique, such as squeeze, rolling, forge to optimize the intensity of magnesium alloy, or pass through addition
Some rare earth elements, such as Gd, Er, Nd, Y, Ce improve the intensity and plasticity of magnesium alloy, but this method production cost is high
It is high, limit a wide range of use of rare-earth-contained magnesium alloy.Therefore, it is badly in need of a kind of economic and practical high intensity Mg-Zn-Al systems deformation
The preparation method of magnesium alloy and the Mg-Zn-Al systems deformed Mg with more excellent comprehensive mechanical property prepared by this method
Alloy.
Invention content
In view of this, it is an object of the invention to：(1) a kind of high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu are provided；
(2) a kind of preparation method of the high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu is provided.
In order to achieve the above objectives, the present invention provides the following technical solutions：
1, a kind of high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu, by mass percentage, the magnesium alloy is by following
Group is grouped as：Zn：5.5-6.5%, Al：2.5-3.5%, Cu：0.1-2.1%, inevitable impurity≤0.15%, surplus are
Magnesium.
Preferably, by mass percentage, the magnesium alloy is composed of the following components：Zn：6.0-6.5%, Al：3.0-
3.5%, Cu：0.3-1.2%, inevitable impurity≤0.15%, surplus are magnesium.
Preferably, by mass percentage, the magnesium alloy is composed of the following components：Zn：6.05%, Al：3.02%,
Cu：0.91%, inevitable impurity≤0.15%, surplus is magnesium.
2, the preparation method of a kind of high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu, includes the following steps：
(1) melting：With pure magnesium ingot, pure zinc ingot, fine aluminium ingot and pure copper powder are raw material, by the quality hundred of the magnesium alloy component
Divide ratio to carry out calculating dispensing, 150 ± 5 DEG C of pure magnesium ingot will be preheating to and be added in resistance furnace, heat to 750 ± 5 DEG C to institute
Pure magnesium ingot fusing is stated, pure zinc ingot and fine aluminium ingot are added to described pure successively after 720 ± 5 DEG C for Serum Magnesium temperature control
Zinc ingot metal and fine aluminium ingot fully melt, and slag hitting stirring, is then cooled to 680 ± 5 DEG C, the Serum Magnesium is added in pure copper powder after standing
In fully melt to the pure copper powder, after standing again slag hitting stir, be warming up to 720 ± 5 DEG C, refining agent be added and is refined,
The Serum Magnesium temperature is controlled at 720 ± 5 DEG C, heat preservation is cooled to 700 ± 5 DEG C after standing 30min, finally uses metal mould casting
It makes, magnesium alloy ingot is made；Entire fusion process is in CO2And SF6Mixed gas protected lower progress；
(2) it machines：The oxide skin on magnesium alloy ingot surface in removal step (1)；
(3) Homogenization Treatments：Two-step homogenization processing will be carried out through step (2) treated magnesium alloy ingot；
(4) hot extrusion：Hot extrusion will be carried out through step (3) treated magnesium alloy ingot, the high-strength Mg- containing Cu is made
Zn-Al series deformation magnesium alloys.
Preferably, in step (1), the die cast is to be poured into Serum Magnesium to be preheating to 250 ± 5 DEG C of cast iron casting mould
In.
Preferably, in step (1), the CO2And SF6Mixed gas in SF6Shared volume fraction is 1%.
Preferably, in step (3), the two-step homogenization processing is specially：First handled through step (2) with graphite powder covering
Magnesium alloy ingot afterwards, then 330 DEG C are heated to after being wrapped up with aluminium foil, 4 hours are kept the temperature, is then warming up to 400 again
DEG C, 12 hours are kept the temperature, room temperature is air-cooled to.
Preferably, in step (4), the hot extrusion is specially：It is 25 in extrusion ratio:1, extrusion speed 0.85m/min,
Hot extrusion is carried out under the conditions of 350 DEG C.
The beneficial effects of the present invention are：The high-strength Mg-Zn-Al series deformation magnesium alloys that the present invention provides a kind of containing Cu and
Preparation method can be adsorbed on crystal face since solid solubility is minimum in magnesium by Cu as a kind of surface active element, reduce surface
Can, it grows up required nucleating work to reduce crystal grain, finally so that crystal grain is fined, the present invention is in Mg-Zn-Al systems deformed Mg
0.3-1.2%Cu elements are added in alloy so that the low melting point β-Mg of continuous net-shaped distribution17Al12It is mutually gradually converted into tiny more
The high-melting-point MgAlCu ternary phases for dissipating distribution, weaken β-Mg17Al12The formation of phase not only increases the mechanical property of alloy,
Also allow alloy that can be on active service at higher temperatures, wherein MgAlCu ternary phases can effectively hinder brilliant in Dynamic Recrystallization
Grain is grown up, and the crystallite dimension of final As-extruded is about 2 μm.5.5-6.5%Zn elements are added, alloy can be avoided because of Zn contents
It is excessively high and Mg-Zn-Al series deformation magnesium alloys is caused serious hot tearing and shrinkage porosite occur, it is unfavorable for lacking for the mechanical property of alloy
It falls into, adds 2.5-3.5%Al elements, can avoid, because Al is excessively high, Al being made in the form of the second phase to be present in magnesium matrix, formed
Continuous netted phase β-Mg17Al12, it is unfavorable for the defect of the plasticity of alloy.In addition, if Zn elements, Al constituent contents are relatively low,
It is not notable then to strengthen effect.The preparation method of the magnesium alloy is easy to implement, time-consuming short, to the of less demanding of equipment, and is produced into
This is low, wherein first being covered with graphite powder when being homogenized to magnesium alloy, is then wrapped up, can be avoided well with aluminium foil again
Alloy superheat or burning.
Description of the drawings
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides following attached drawing and carries out
Explanation：
Fig. 1 is the stress-strain curve diagram of the Mg-Zn-Al series deformation magnesium alloys prepared in embodiment 1-5；
Fig. 2 is the mechanical property figure of the Mg-Zn-Al series deformation magnesium alloys prepared in embodiment 1-5；
Fig. 3 is the X-ray diffractogram of the Mg-Zn-Al series deformation magnesium alloys prepared in embodiment 1-5；
Fig. 4 is 1 As-extruded Mg-Zn-Al series deformation magnesium alloys material edge in embodiment perpendicular to microcosmic group of the direction of extrusion
Knit metallograph；
Fig. 5 is 2 As-extruded Mg-Zn-Al series deformation magnesium alloys materials edges in embodiment perpendicular to microcosmic group of the direction of extrusion
Knit metallograph；
Fig. 6 is 3 As-extruded Mg-Zn-Al series deformation magnesium alloys materials edges in embodiment perpendicular to microcosmic group of the direction of extrusion
Knit metallograph；
Fig. 7 is 4 As-extruded Mg-Zn-Al series deformation magnesium alloys materials edges in embodiment perpendicular to microcosmic group of the direction of extrusion
Knit metallograph；
Fig. 8 is 5 As-extruded Mg-Zn-Al series deformation magnesium alloys materials edges in embodiment perpendicular to microcosmic group of the direction of extrusion
Knit metallograph.
Specific implementation mode
The preferred embodiment of the present invention will be described in detail below.
Embodiment
The constituent of 1 each Mg-Zn-Al series deformation magnesium alloys of table matches
It is made by following methods at composition proportion according to each group of magnesium alloys in table 1 and Mg-6.12Zn-3.25Al systems is made respectively
Wrought magnesium alloy, Mg-6.28Zn-3.37Al-0.32Cu series deformation magnesium alloys, the deformation of Mg-6.34Zn-3.13Al-0.63Cu systems
Magnesium alloy, Mg-6.05Zn-3.02Al-0.91Cu series deformation magnesium alloys, Mg-6.47Zn-3.49Al-1.18Cu systems deformed Mg are closed
Golden six kinds of magnesium alloys, preparation method are as follows：
(1) melting：With pure magnesium ingot, pure zinc ingot, fine aluminium ingot is raw material, according to each component in Mg-Zn-Al series deformation magnesium alloys
Mass percent carry out calculating dispensing, will be preheating to 150 DEG C pure magnesium ingot be added well formula resistance furnace in, heat to 750
It DEG C is melted to the pure magnesium ingot, Serum Magnesium temperature control after 720 DEG C pure zinc ingot and fine aluminium ingot is added to institute successively
State pure zinc ingot and fine aluminium ingot fully melt, after standing 15min slag hitting stir, be then cooled to 680 DEG C, pure copper powder is added described in
It is fully melted to the pure copper powder in Serum Magnesium, 15min slag hittings stirring after standing again is warming up to 720 DEG C, and German solvent is added
It is refined, the Serum Magnesium temperature is controlled at 720 DEG C, heat preservation is cooled to 700 DEG C after standing 30min, finally by Serum Magnesium
It is poured into the cast iron casting mould for being preheating to 250 DEG C, it is air-cooled, magnesium alloy ingot is made；Entire fusion process is in CO2And SF6Gaseous mixture
Body protection is lower to be carried out, wherein SF in mixed gas6Shared volume fraction is 1%；
(2) it machines：The oxide skin on magnesium alloy ingot surface in removal step (1), and by ladle barrow at diameter 80mm；
(3) Homogenization Treatments：First carried out through step (2) treated magnesium alloy ingot, then with aluminium foil with graphite powder covering
It is heated to 330 DEG C after package, keeps the temperature 4 hours, is then warming up to 400 DEG C again, keeps the temperature 12 hours, is air-cooled to room temperature；
(4) hot extrusion：In extrusion ratio will be 25 through step (3) treated magnesium alloy ingot:1, extrusion speed is
0.85m/min carries out hot extrusion, Mg-Zn-Al series deformation magnesium alloys under the conditions of 340 DEG C.
Performance test
One, mechanics properties testing
According to the standard of national standard GB228-2002, by the Mg-Zn-Al series deformation magnesium alloy materials obtained by embodiment 1-5
Linear cutter carries out tension test at standard tensile specimen, and draw direction is parallel to the direction of extrusion.Gained stretches the stress of sample
Strain curve by Fig. 1 as shown in Figure 1, obtain the mechanical property figure of each magnesium alloy materials and each mechanical performance data, such as Fig. 2 and table
Shown in 2.
The mechanical property of Mg-Zn-Al series deformation magnesium alloy materials in 2 embodiment 1-5 of table
| Embodiment | Alloy name | Yield strength (MPa) | Tensile strength (MPa) | Elongation percentage (%) |
| Embodiment 1 | Mg-6.12Zn-3.25Al | 157 | 336 | 20 |
| Embodiment 2 | Mg-6.28Zn-3.37Al-0.32Cu | 253 | 374 | 16 |
| Embodiment 3 | Mg-6.34Zn-3.13Al-0.63Cu | 227 | 362 | 15 |
| Embodiment 4 | Mg-6.05Zn-3.02Al-0.91Cu | 280 | 385 | 19 |
| Embodiment 5 | Mg-6.47Zn-3.49Al-1.18Cu | 226 | 334 | 16 |
As shown in Table 2, the yield strength and tension of the Mg-Zn-Al series deformation magnesium alloys containing Cu prepared in embodiment 2-5
Intensity is significantly improved when Cu contents are 0.9%, compared with the Mg-Zn-Al series deformation magnesium alloys without Cu, surrender
Intensity improves 123Mpa, improves 78.3%, and tensile strength improves 49Mpa, improves 14.6%.
Two, microscopic examination
Fig. 3 is the X ray diffracting spectrum of the As-extruded Mg-Zn-Al series deformation magnesium alloy materials of embodiment 1-5, can by Fig. 3
Know, main phase composition is matrix α-Mg, Mg in the As-extruded Mg-Zn-Al series deformation magnesium alloys without Cu in embodiment 132
(Al, Zn)49, and main phase composition is matrix α-in the As-extruded Mg-Zn-Al series deformation magnesium alloys containing Cu in embodiment 2-5
Mg, Mg32(Al, Zn)49With MgAlCu phases.
Fig. 4-8 is respectively the As-extruded Mg-Zn-Al series deformation magnesium alloys material of embodiment 1-5 along perpendicular to the direction of extrusion
Microstructure metallograph, as seen from the figure, in embodiment 1 without Cu As-extruded Mg-Zn-Al series deformation magnesium alloys average crystalline substance
Particle size is about 8 μm, and after Cu is added in magnesium alloy, crystallite dimension significantly refines, this is because formed after Cu is added
High-melting-point MgAlCu phases, pinning crystal boundary hinder growing up for crystal grain.Wherein, when the Cu mass percentages of addition are 0.9%
When, the effect of crystal grain thinning is the most apparent, and crystallite dimension is minimum, about 2 μm.In addition, the distribution fine uniform disperse of the second phase,
And there are intra-dies and crystal boundary.This illustrates that the second phase of the Dispersed precipitate not only acts as the effect of crystal grain thinning, in alloy
Stress deformation can also hinder the movement of dislocation, improve the intensity of alloy.
The present invention rationally adjusts Zn and Al in alloy and contains by adding Cu elements into Mg-Zn-Al series deformation magnesium alloys
Amount, the Mg-Zn-Al series deformation magnesium alloys containing Cu finally prepared are compared with the magnesium alloy obtained by traditional handicraft, mechanical property
It can greatly improve, there is extraordinary comprehensive mechanical property.Every mechanical property of the alloy meets or exceeds commercialization and contains
Zirconium magnesium alloy (such as ZK60).In addition for Mg-Al-Zn, that is, AZ systems alloy, main hardening constituent is β-Mg17Al12Phase, should
The fusing point of phase is relatively low, and exist in the form of continuous net-shaped second phase in magnesium matrix, not to the raising of magnesium alloy mechanical property
Profit, and the mechanical behavior under high temperature of alloy can be significantly reduced.But in Mg-Zn-Al, that is, ZA systems alloy, main second phase is
Mg32(Al,Zn)49, the fusing point of the phase is higher than β-Mg17Al12Phase, and it is strengthened effect and is also significantly better than β-Mg17Al12Phase adds
Suitable Cu elements are added in ZA systems alloy, make in the alloy generate MgAlCu phases, further promote the synthesis of the alloy
Performance.In the present invention mechanical property of the high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu higher than common As-extruded AZ31,
The mechanical property of AZ61 and AZ80 expands the use scope of Mg-Zn-Al systems magnesium alloy.And it is time-consuming short in preparation process, it is right
Equipment it is of less demanding, and production cost is low, lays a solid foundation for later production application.
In the present invention, during preparing Mg-Zn-Al systems magnesium alloy, in melting process, involved temperature can be
It is changed in ± 5 DEG C.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (7)
1. a kind of high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu, which is characterized in that by mass percentage, the magnesium alloy
It is composed of the following components：Zn：6.0-6.5%, Al：3.0-3.5%, Cu：0.3-1.2%, inevitable impurity≤0.15%, surplus are
Magnesium；The high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu are prepared by the following method：
（1）Melting：With pure magnesium ingot, pure zinc ingot, fine aluminium ingot and pure copper powder are raw material, by the mass percent of the magnesium alloy component
Calculating dispensing is carried out, 150 ± 5 DEG C of pure magnesium ingot will be preheating to and be added in resistance furnace, heat to 750 ± 5 DEG C to described pure
Magnesium ingot melts, and pure zinc ingot and fine aluminium ingot are added to the pure zinc ingot and pure successively after 720 ± 5 DEG C for the control of Serum Magnesium temperature
Aluminium ingot fully melts, and slag hitting stirring, is then cooled to 680 ± 5 DEG C after standing, and pure copper powder is added in Serum Magnesium to the fine copper
Powder fully melts, and slag hitting stirring after standing again is warming up to 720 ± 5 DEG C, and refining agent is added and is refined, by Serum Magnesium temperature
At 720 ± 5 DEG C, heat preservation is cooled to 700 ± 5 DEG C after standing 30min for control, finally uses die cast, and magnesium alloy casting is made
Ingot；Entire fusion process is in CO2And SF6Mixed gas protected lower progress；
（2）Machining：Removal step（1）The oxide skin on middle magnesium alloy ingot surface；
（3）Homogenization Treatments：It will be through step（2）Treated, and magnesium alloy ingot carries out two-step homogenization processing；
（4）Hot extrusion：It will be through step（3）Treated, and magnesium alloy ingot carries out hot extrusion, and the high-strength Mg-Zn-Al containing Cu is made
Series deformation magnesium alloy.
2. a kind of high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu as described in claim 1, which is characterized in that press quality hundred
Divide than meter, the magnesium alloy is composed of the following components：Zn：6.05%, Al：3.02%, Cu：0.91%, inevitable impurity≤
0.15%, surplus is magnesium.
3. a kind of preparation method of high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu as claimed in claim 1 or 2, feature exist
In including the following steps：
（1）Melting：With pure magnesium ingot, pure zinc ingot, fine aluminium ingot and pure copper powder are raw material, by the mass percent of the magnesium alloy component
Calculating dispensing is carried out, 150 ± 5 DEG C of pure magnesium ingot will be preheating to and be added in resistance furnace, heat to 750 ± 5 DEG C to described pure
Magnesium ingot melts, and pure zinc ingot and fine aluminium ingot are added to the pure zinc ingot and pure successively after 720 ± 5 DEG C for the control of Serum Magnesium temperature
Aluminium ingot fully melts, and slag hitting stirring, is then cooled to 680 ± 5 DEG C after standing, and pure copper powder is added in Serum Magnesium to the fine copper
Powder fully melts, and slag hitting stirring after standing again is warming up to 720 ± 5 DEG C, and refining agent is added and is refined, by Serum Magnesium temperature
At 720 ± 5 DEG C, heat preservation is cooled to 700 ± 5 DEG C after standing 30min for control, finally uses die cast, and magnesium alloy casting is made
Ingot；Entire fusion process is in CO2And SF6Mixed gas protected lower progress；
（2）Machining：Removal step（1）The oxide skin on middle magnesium alloy ingot surface；
（3）Homogenization Treatments：It will be through step（2）Treated, and magnesium alloy ingot carries out two-step homogenization processing；
（4）Hot extrusion：It will be through step（3）Treated, and magnesium alloy ingot carries out hot extrusion, and the high-strength Mg-Zn-Al containing Cu is made
Series deformation magnesium alloy.
4. a kind of preparation method of the high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu as claimed in claim 3, feature exist
In step（1）In, the die cast is to be poured into Serum Magnesium in the cast iron casting mould for being preheating to 250 ± 5 DEG C.
5. a kind of preparation method of the high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu as claimed in claim 3, feature exist
In step（1）In, the CO2And SF6Mixed gas in SF6Shared volume fraction is 1%.
6. a kind of preparation method of the high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu as claimed in claim 3, feature exist
In step（3）In, the two-step homogenization processing is specially：First covered through step with graphite powder（2）Magnesium alloy casting that treated
Ingot, then 330 DEG C are heated to after being wrapped up with aluminium foil, 4 hours are kept the temperature, is then warming up to 400 DEG C again, heat preservation 12 is small
When, it is air-cooled to room temperature.
7. a kind of preparation method of the high-strength Mg-Zn-Al series deformation magnesium alloys containing Cu as claimed in claim 3, feature exist
In step（4）In, the hot extrusion is specially：It is 25 in extrusion ratio:1, extrusion speed 0.85m/min, under the conditions of 350 DEG C
Carry out hot extrusion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710597942.6A CN107326235B (en) | 2017-07-20 | 2017-07-20 | A kind of high-strength Mg-Zn-Al series deformation magnesium alloys and preparation method thereof containing Cu |
Applications Claiming Priority (1)
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| 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 |
| CN108728707A (en) * | 2018-06-27 | 2018-11-02 | 济南大学 | A kind of crushing failure at high speed high-strength wrought magnesium alloys 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 |
| CN110306087A (en) * | 2019-07-29 | 2019-10-08 | 深圳市爱斯特新材料科技有限公司 | A kind of Mg-Al-Zn-Mn-Sn-Bi magnesium alloy with high strength and ductility and preparation method thereof |
| CN115612953A (en) * | 2022-11-17 | 2023-01-17 | 质子汽车科技有限公司 | Method for reducing thermoplastic deformation stress of magnesium alloy |
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| CN102046821B (en) * | 2008-06-03 | 2013-03-27 | 独立行政法人物质·材料研究机构 | Mg-base alloy |
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