CN106939388A - A kind of high strength and low cost high-ductility isotropism Mg Zn y alloys and preparation method thereof - Google Patents
A kind of high strength and low cost high-ductility isotropism Mg Zn y alloys and preparation method thereof Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 56
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000011282 treatment Methods 0.000 claims abstract description 10
- 238000000265 homogenisation Methods 0.000 claims abstract description 9
- 239000011777 magnesium Substances 0.000 claims abstract description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- 238000009825 accumulation Methods 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 229910000946 Y alloy Inorganic materials 0.000 claims description 45
- 238000001125 extrusion Methods 0.000 claims description 33
- 238000002844 melting Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 11
- 239000011701 zinc Substances 0.000 claims description 8
- 229910052727 yttrium Inorganic materials 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000005457 optimization Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000005266 casting Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000005275 alloying Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 229910001093 Zr alloy Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000011533 pre-incubation Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000748 Gd alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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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
- C22C23/06—Alloys based on magnesium with a rare earth metal 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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Powder Metallurgy (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Extrusion Of Metal (AREA)
Abstract
The present invention discloses a kind of high strength and low cost high-ductility isotropism Mg Zn y alloys and preparation method thereof, and the weight/mass percentage composition of each component is：Zn=1.2~1.4, Y=2.2~2.5, Fe≤0.06, Mn≤0.02, surplus is magnesium and inevitable impurity.Preparation method comprises the following steps：It will first be extruded by Homogenization Treatments Mg Zn y alloy ingot castings on extruder；Then the alloy after extruding is rolled, accumulation pushes 10% 30%；Finally the alloy after rolling is heat-treated.The present invention cooperates with coupling technique to be remarkably improved the mechanical property of Mg Zn y alloys by rolling deformation with heat treatment, and significantly reduces the anisotropy of alloy mechanical property, obtains high strength and low cost high-ductility isotropism magnesium alloy, and density is less than 1.8g/cm3.Present invention process is simple, portable strong, and easily operation, and material can meet the actual requirement of mechanical property on different directions, can be widely applied to the fields such as Aero-Space, automobile and track traffic, to reach the effect of lightweight and vibration and noise reducing.
Description
Technical field
The invention belongs to magnesium alloy materials technology, be related to a kind of high strength and low cost high-ductility isotropism Mg-Zn-Y alloys and
Its preparation technology.Specifically according to attenuation of the rare earth element to texture, Rare Earth Y is added into magnesium zinc bianry alloy, and lead to
Cross control follow-up rolling and Technology for Heating Processing to prepare higher-strength, high plasticity and low anisotropic magnesium alloy plate
Process technology, improves magnesium alloy room temperature and cold plasticity and forming property.
Background technology
Magnesium alloy is the most light structural material used at present, and its density is the 2/3 of aluminium, the 1/5 of steel, there is high ratio strong
Degree, specific stiffness, specific modulus, aboundresources, energy-conserving and environment-protective, have a wide range of applications field, by universally acknowledged for " 21st century
Most promising new material ".Due to the special Patterns for Close-Packed Hexagonal Crystal structure of magnesium alloy, it is easily produced in deformation process
Texture, so as to cause alloy to show larger performance difference in different directions, with obviously anisotropy.Mechanics
Property anisotropy turns into the principal element for restricting magnesium alloy large-sized squeeze wood and rolled stock development.
Improving the anisotropic method of alloy mechanical property at present has addition alloying element, multiway forging etc..Rare earth element
Melt can be purified, crystal grain thinning improves the mechanical property of alloy, and can weaken texture, thus is often used to improve magnesium alloy
The performance of alloy.By toward adding Li and Al-5Ti-B in AZ31 in patent CN102876948A, and extrusion process is carried out to it,
The crystal grain of alloy has been refined, anisotropy has been reduced, and improve the mechanical property of alloy.Patent CN105483484A is by inciting somebody to action
Alloying, extruding and timeliness are combined, and prepare isotropic Mg-Zn-Zr-RE high-strength wrought magnesium alloys.But due to it
Need to carry out reciprocating extrusion, it is difficult to prepare big gauge material, and timeliness is time-consuming longer, is unfavorable for application.Patent
CN103911569A effectively weakens wrought magnesium alloy by the multiway forging to alloy progress multi-pass and pressure processing
Mechanical Property Anisotropy, but this method has more requirement to initial blank, and application is narrower.Although, it is existing at present
Some improve the method for alloy anisotropic properties, but various methods are by certain limitation.Therefore, for enlargement deformation magnesium
A kind of application of alloy, necessary technique of exploitation is simple, and the cycle is shorter, lower-cost processing method.
Extruding, rolling and heat treatment are three kinds of conventional processing methods of magnesium alloy, it have been carried out widely grinding both at home and abroad
Study carefully.Crimp is one of important plastic deformation mode.Due to strong three-dimensional compressive stress, energy in extrusion process used for forming
It is enough effectively to prevent that the poor magnesium alloy of plasticity from destroying in violent deformation.In addition, crimp can eliminate casting
Defect, refining alloy tissue and crystal grain, can greatly improve the mechanical property of alloy.Rolling deformation is acknowledged as a kind of raising magnesium
The method of alloy strength.L.B.Tong etc. carries out small deformation rolling experiment, rolling to the As-extruded Mg-Zn-Y alloys of the phase containing LPSO
The basal plane texture intensity increase of alloy afterwards, LPSO phases have refined, have added in alloy and there is highdensity dislocation so that alloy
Yield strength increases to 364MPa from 240MPa.C.Xu etc. has carried out the rolling of moderate finite deformation amount to Mg-Gd-Y-Zn-Zr alloys
Deformation, equally significantly improves the mechanical property of alloy.Heat treatment is the side of a kind of conventional regulation and control alloy strength and plasticity
Method.Patent CN201010588372.2 by " solid solution+timeliness " handle significantly improve Mg-Zn-Zr alloys room temperature strength and
Plasticity.Patent CN201110077840.4 is heat-treated intensity and the modeling for improving Mg-Al-Zn-Gd alloys by " solid solution+timeliness "
Property.Patent CN201410704385.X is caused by carrying out the deformation Technology for Heating Processing of " solid solution+rolling+timeliness " to AZ81 sheet materials
The room temperature tensile intensity of alloy improves 15.5%-18.2%, but does not mention the situation of change of plasticity.Solid solution+Ageing Treatment is led to
Often it is used to improve the intensity and plasticity of alloy, but it is time-consuming longer, and cost is higher, is unfavorable for being generalized to engineer applied.
Alloy after extruding usually contains obviously streamlined tissue, thus poor mechanical property in different directions
It is generally not larger.Rolling deformation can increase substantially the intensity of alloy, but but be unfavorable for the plasticity of alloy.After rolling deformation
Alloy be heat-treated and can generally be significantly improved the plasticity of alloy, improve its forming property.Thus, pass through in the present invention
" extruding+rolling+heat treatment " carrys out the mechanical property of comprehensive regulation alloy, make every effort to obtain that a kind of intensity is higher, plasticity preferably, it is each to
The weaker alloy of the opposite sex.
The content of the invention
For above shortcomings in the prior art, it is an object of the invention to provide a kind of high strength and low cost high-ductility is each
To same sex Mg-Zn-Y alloys, solve magnesium alloy because mechanical property is low, anisotropy relatively strong and high cost and apply limited
Problem.Its preparation method is further also provided, low alloyed element Mg-Zn- is realized by extruding, rolling and heat treatment coupling technique
The optimization of the mechanical property of y alloy, obtains a kind of isotropic magnesium alloy of high strength and low cost high-ductility, with preferable mechanical property
And can effectively weaken wrought magnesium alloy Mechanical Property Anisotropy.
To achieve the above object, the present invention is adopted the following technical scheme that：A kind of high strength and low cost high-ductility isotropism Mg-
Zn-Y alloys, it is characterised in that the weight/mass percentage composition of each component is：Zn=1.2~1.4, Y=2.2~2.5, Fe≤0.06, Mn
≤ 0.02, surplus is magnesium and inevitable impurity.
A kind of preparation method of high strength and low cost high-ductility isotropism Mg-Zn-Y alloys, passes through crimp, rolling deformation
The optimization of magnesium alloy mechanical property is realized with heat treatment coupling technique, following steps are specifically included：
（1）By above-mentioned formula, melting is carried out by resistance furnace, is incubated at 720 DEG C and stirring makes raw material fully melt, treat that alloy is complete
700 DEG C are cooled to after portion's fusing and stands insulation 20 minutes, and then the aluminium alloy of melting is cast among 300 DEG C of mould, with
Mould is cooled down, obtained Mg-Zn-Y alloy cast ingots.In melting and casting cycle with 1% SF6And CO2Mixed gas liquation is entered
Row protection.Wherein, Zn is added in pure zinc form, Y is added in Mg-26wt%Y intermediate alloys form；
（2）By step（1）Obtained Mg-Zn-Y alloy cast ingots were in 480-520 DEG C of Homogenization Treatments 6-10 hours；
（3）By step（2）Mg-Zn-Y alloys and extrusion die after Homogenization Treatments are incubated 1~3h at 400~450 DEG C；Then
Extruded on extruder, wherein the technological parameter used for：400~450 DEG C of extrusion temperature, extrusion ratio is 10, extruding speed
5mm/s is spent, and extrusion speed is constant；
（4）By step（3）Mg-Zn-Y alloys after extruding are rolled at 430-460 DEG C, and single pass pushes 3%-8%, under accumulation
Press 10%-30%；
（5）By step（4）Mg-Zn-Y alloys after rolling are heat-treated 2-8 hours at 450-550 DEG C, last air cooling.
Compared with prior art, the invention has the advantages that：
1st, the present invention uses Mg-1.3%Zn-2.4%Y alloys, and alloying element content is less, low cost, in Mg-Zn-Y alloys
Zn and Y be effective intensified element, the intensity on magnesium alloy different directions and plasticity after being handled by this method have bright
It is aobvious to improve, the optimization and anisotropic reduction of mechanical property are realized, wherein by rolling deformation and heat treatment coupling technique
After processing, preferably, and than more uniform, tensile strength is for mechanical property on its different directions（271±10）MPa, elongation percentage is
21.3%±2.6%。
2nd, present invention process is simple, and device therefor is conventional common apparatus, portable strong, and easily operation, alloy member
Cellulose content is extremely low, with low cost, has obtained a kind of high strength and low cost high-ductility isotropism magnesium alloy materials, has solved magnesium alloy room
Warm plasticity is poor, the problem of sheet material Mechanical Property Anisotropy is more obvious, can be widely applied to Aero-Space, automobile and track
The fields such as traffic, to reach the effect of lightweight and vibration and noise reducing.
Brief description of the drawings
Fig. 1 is the force diagram of comparative example 1 and comparative example 2；
Fig. 2 is the force diagram of embodiment 1；
Fig. 3 is the force diagram of embodiment 2.
Embodiment：
The present invention is elaborated below by specific embodiment.The present embodiment is carried out in fact lower premised on the technology of the present invention
Apply, now provide detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following examples.
。
Below with the inventive method is made exemplified by comparative example 1 and embodiment 1, and the formula of comparative example 2 and embodiment 2 into
One step is described in detail.Embodiment 3-6 preparation method and effect has similar effect, is not repeated.
Comparative example 1：A kind of preparation method of Mg-Zn-Y alloys, comprises the following steps：
（1）By resistance furnace melting Mg-Zn-Y alloys, it is incubated at 720 DEG C and stirring makes raw material fully melt, treats that alloy is all molten
700 DEG C are cooled to after change and stands insulation 20 minutes, then the aluminium alloy of melting is cast among 300 DEG C of mould, it is cold with mould
But, the Mg-Zn-Y alloy cast ingots obtained.In melting and casting cycle with 1% SF6And CO2Mixed gas liquation is protected
Shield.Wherein, Zn is added in pure zinc form, Y is added in Mg-26wt%Y intermediate alloys form；
（2）By step（1）Obtained Mg-Zn-Y alloy cast ingots were in 480-520 DEG C of Homogenization Treatments 6-10 hours；
（3）By step（2）Mg-Zn-Y alloys and extrusion die after Homogenization Treatments are incubated 1~3h at 400~450 DEG C；Then
Extruded on extruder, wherein the technological parameter used for：400~450 DEG C of extrusion temperature, extrusion ratio is 10, extruding speed
5mm/s is spent, and extrusion speed is constant；
The Mechanics Performance Testing on different directions is carried out to the Mg-Zn-Y alloys prepared using above method.Measurement direction is edge
The direction of extrusion（0°）, perpendicular to the direction of extrusion（90°）, with direction of extrusion direction at 45 °；Test temperature is room temperature；Draw speed
For 2mm/min.
As a result the mechanical property on As-extruded Mg-1.3%Zn-2.4%Y alloy different directions is shown：Tensile strength average value
For 248.7MPa, the extreme value of the difference of tensile strength is 84MPa, and the maximum tensile strength is 1.40 times of minimum tensile strength, extension
Rate average value is 7.8%, and the extreme value of the difference of elongation percentage is 6.1%, and maximum elongation percentage is 2.39 times of minimum elongation percentage.Different directions
The mechanical property difference of upper alloy is larger, with stronger anisotropy.
Embodiment 1：A kind of preparation method of high strength and low cost high-ductility isotropism Mg-Zn-Y alloys, comprises the following steps：
（1）Above-mentioned As-extruded Mg-Zn-Y alloys are rolled at 450 DEG C along the direction of extrusion, preincubation 20min are rolled, respectively
5min is incubated between passage, single pass pushes 5%, and accumulation pushes 20%；
（2）Mg-Zn-Y alloys after rolling are heat-treated 2 hours at 500 DEG C, last air cooling.
The Mechanics Performance Testing on different directions is carried out to the Mg-Zn-Y alloys prepared using above method.Measurement direction
For along the direction of extrusion（0°）, perpendicular to the direction of extrusion（90°）, with direction of extrusion direction at 45 °；Test temperature is room temperature；Stretching
Speed is 2mm/min.
As a result the mechanical property on heat treatment state Mg-1.3%Zn-2.4%Y alloy different directions is shown：Tensile strength is averaged
It is worth for 270MPa, the extreme value of the difference of tensile strength is 20MPa, and the maximum tensile strength is 1.08 times of minimum tensile strength, extension
Rate average value is 21.3%, and the extreme value of the difference of elongation percentage is 6.2%, and maximum elongation percentage is 1.35 times of minimum elongation percentage.Not Tongfang
The mechanical property difference of upward alloy is smaller, and Mechanical Property Anisotropy is weaker.The alloy compared to " comparative example 1 ", intensity and
Elongation percentage is greatly improved, and the difference on different directions between intensity and elongation percentage significantly reduces.Tensile strength average value
21.3MPa is improved, the extreme value of the difference of tensile strength reduces 64MPa, and elongation percentage average value adds 13.5%, with excellent
Comprehensive mechanical property.And the rare earth element percentage by weight of the magnesium alloy is less than 2.5%, alloying cost is very low.
Comparative example 2：A kind of preparation method of Mg-Zn-Y alloys, comprises the following steps：
（1）By resistance furnace melting Mg-Zn-Y alloys, it is incubated at 720 DEG C and stirring makes raw material fully melt, treats that alloy is all molten
700 DEG C are cooled to after change and stands insulation 20 minutes, then the aluminium alloy of melting is cast among 300 DEG C of mould, it is cold with mould
But, the Mg-Zn-Y alloy cast ingots obtained.In melting and casting cycle with 1% SF6And CO2Mixed gas liquation is protected
Shield.Wherein, Zn is added in pure zinc form, Y is added in Mg-26wt%Y intermediate alloys form；
（2）By step（1）Obtained Mg-Zn-Y alloy cast ingots were in 480-520 DEG C of Homogenization Treatments 6-10 hours；
（3）By step（2）Mg-Zn-Y alloys and extrusion die after Homogenization Treatments are incubated 1~3h at 400~450 DEG C；Then
Extruded on extruder, wherein the technological parameter used for：400~450 DEG C of extrusion temperature, extrusion ratio is 10, extruding speed
5mm/s is spent, and extrusion speed is constant；
The Mechanics Performance Testing on different directions is carried out to the Mg-Zn-Y alloys prepared using above method.Measurement direction is edge
The direction of extrusion（0°）, perpendicular to the direction of extrusion（90°）, with direction of extrusion direction at 45 °；Test temperature is room temperature；Draw speed
For 2mm/min.
As a result the mechanical property on As-extruded Mg-1.3%Zn-2.4%Y alloy different directions is shown：Tensile strength average value
For 248.7MPa, the extreme value of the difference of tensile strength is 84MPa, and the maximum tensile strength is 1.40 times of minimum tensile strength, extension
Rate average value is 7.8%, and the extreme value of the difference of elongation percentage is 6.1%, and maximum elongation percentage is 2.39 times of minimum elongation percentage.Different directions
The mechanical property difference of upper alloy is larger, with stronger anisotropy.
Embodiment 2：A kind of preparation method of high strength and low cost high-ductility isotropism Mg-Zn-Y alloys, comprises the following steps：
（1）Above-mentioned As-extruded Mg-Zn-Y alloys are rolled at 450 DEG C along the direction of extrusion, preincubation 20min are rolled, respectively
5min is incubated between passage, single pass pushes 5%, and accumulation pushes 20%；
（2）Mg-Zn-Y alloys after rolling are heat-treated 4 hours at 500 DEG C, last air cooling.
The Mechanics Performance Testing on different directions is carried out to the Mg-Zn-Y alloys prepared using above method.Measurement direction
For along the direction of extrusion（0°）, perpendicular to the direction of extrusion（90°）, with direction of extrusion direction at 45 °；Test temperature is room temperature；Stretching
Speed is 2mm/min.
As a result the mechanical property on heat treatment state Mg-1.3%Zn-2.4%Y alloy different directions is shown：Tensile strength is averaged
It is worth for 235.7MPa, the extreme value of the difference of tensile strength is 10MPa, and the maximum tensile strength is 1.04 times of minimum tensile strength, is prolonged
It is 22.2% to stretch rate average value, and the extreme value of the difference of elongation percentage is 6%, and maximum elongation percentage is 1.31 times of minimum elongation percentage.Not Tongfang
The mechanical property difference of upward alloy is smaller, and Mechanical Property Anisotropy is weaker.The alloy compared to " comparative example 2 ", intensity and
Elongation percentage is greatly improved, and the difference on different directions between intensity and elongation percentage significantly reduces.Tensile strength average value
13MPa is reduced, the extreme value of the difference of tensile strength reduces 74MPa, and elongation percentage average value adds 14.4%, with excellent
Comprehensive mechanical property.And the rare earth element percentage by weight of the magnesium alloy is less than 2.5%, alloying cost is very low.
It can be obtained according to above-described embodiment and comparative example analysis：Micro Zn and Y element is added in pure magnesium, As-extruded is closed
Gold just has preferable mechanical property, but the mechanical property difference of alloy is larger on different directions, is unfavorable for sheet alloy
Popularization and application；And after rolling deformation and heat treatment coupling technique, the resultant force mechanical property of alloy is significantly lifted,
Anisotropy significantly weakens, and has prepared a kind of high-strength and high ductility isotropism Mg-Zn-Y alloys.
To sum up, the inventive method can prepare high strength and low cost high-ductility isotropism magnesium alloy, keep higher-strength
While, plasticity is increased substantially, and the anisotropy of alloy mechanical property is significantly reduced, it disclosure satisfy that current development to material
The vibration absorbing low noise of proposition, light-weighted requirement, and the preparation technology of the present invention, with versatility is wide, portability is strong, technique
The advantages of simple maturation is with easily realizing, the high-strength and high ductility isotropism magnesium alloy prepared can be widely applied to aviation boat
My god, defence and military, automobile, track traffic, punching press, the field such as forging and stamping.
It should finally be noted the above embodiment can make those skilled in the art that this hair is more fully understood
It is bright, but do not limit the invention in any way.Therefore, although this specification is to present invention has been detailed description,
It will be appreciated by those skilled in the art that still can be modified to the present invention or equivalent；And all do not depart from this hair
The technical scheme of bright Spirit Essence and its improvement, it all should cover among the protection domain of patent of the present invention.
Claims (2)
1. a kind of high strength and low cost high-ductility isotropism Mg-Zn-Y alloys, it is characterised in that the weight/mass percentage composition of each component
For：Zn=1.2~1.4, Y=2.2~2.5, Fe≤0.06, Mn≤0.02, surplus is magnesium and inevitable impurity.
2. a kind of preparation method of high strength and low cost high-ductility isotropism Mg-Zn-Y alloys, it is characterised in that pass through rolling deformation
The optimization to magnesium alloy mechanical property is realized with heat treatment coupling technique, following steps are specifically included：
（1）It is formulated by claim 1, melting is carried out by resistance furnace, is incubated at 720 DEG C and stirring makes raw material fully melt, treated
Alloy all fusing after be cooled to 700 DEG C stand insulation 20 minutes, then by the aluminium alloy of melting be cast to 300 DEG C mould it
In, cooled down with mould, obtained Mg-Zn-Y alloy cast ingots；Wherein, Zn is added in pure zinc form, Y is with Mg-26wt%Y intermediate alloys
Form is added；
（2）By step（1）Obtained Mg-Zn-Y alloy cast ingots were in 480-520 DEG C of Homogenization Treatments 6-10 hours；
（3）By step（2）Mg-Zn-Y alloys and extrusion die after Homogenization Treatments are incubated 1~3h at 400~450 DEG C；Then
Extruded on extruder, wherein the technological parameter used for：400~450 DEG C of extrusion temperature, extrusion ratio is 10, extruding speed
5mm/s is spent, and extrusion speed is constant；
（4）By step（3）Mg-Zn-Y alloys after extruding are rolled at 430-460 DEG C, and single pass pushes 3%-8%, under accumulation
Press 10%-30%；
（5）By step（4）Mg-Zn-Y alloys after rolling are heat-treated 2-8 hours at 450-550 DEG C, last air cooling.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109985922A (en) * | 2017-12-29 | 2019-07-09 | 南京理工大学 | A kind of preparation method of multiple grain scale reinforced magnesium alloy material |
| CN112301300A (en) * | 2020-11-02 | 2021-02-02 | 安徽工业大学 | Preparation method of high-strength corrosion-resistant magnesium alloy plate |
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| CN112301300A (en) * | 2020-11-02 | 2021-02-02 | 安徽工业大学 | Preparation method of high-strength corrosion-resistant magnesium alloy plate |
| CN112301300B (en) * | 2020-11-02 | 2022-03-18 | 安徽工业大学 | Preparation method of high-strength corrosion-resistant magnesium alloy plate |
| CN115572926A (en) * | 2022-10-26 | 2023-01-06 | 航天科工(长沙)新材料研究院有限公司 | Heat treatment method of magnesium-lithium alloy |
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