CN109852859A - High-toughness heat-resistant Mg-Y-Er alloy and preparation method thereof suitable for gravitational casting - Google Patents
High-toughness heat-resistant Mg-Y-Er alloy and preparation method thereof suitable for gravitational casting Download PDFInfo
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Abstract
The present invention provides high-toughness heat-resistant Mg-Y-Er alloys of gravitational casting and preparation method thereof, the alloy composition mass percentage content are as follows: 4.0~10.0%RE, 2.0~6.0%Zn, 0.5~1.2%Al, 0.1~0.3%Mn, 0.01~0.08%M, surplus Mg；Wherein M is Ti, one or two kinds of elements in B.Preparation method: (1) by Mg-Y-Er alloying component ingredient is carried out；(2) technical pure magnesium ingot is melted；(3) 700 DEG C are warming up to, industrial-purity zinc, Mg-Y, Mg-Er and Mg-Mn intermediate alloy are melted；(4) 730 DEG C are warming up to, after technical pure aluminium ingot, Al-Ti, Al-Ti-B, Al-B intermediate alloy whole fusing is added, refining obtains magnesium alloy fused mass；(5) gravitational casting；(6) second level solid solution, artificial aging processing.For alloy of the invention after the heat treatment of gravitational casting, second level solution treatment and artificial aging, room temperature tensile intensity is 296MPa, elongation percentage 18%；Drawing by high temperature tensile strength is 212MPa at 200 DEG C, and elongation percentage 23% meets the high demand that aerospace, military project, automobile and other industries develop lightweight.
Description
Technical field
The present invention relates to the high-toughness heat-resistant Mg-Y-Er alloys for being suitable for gravitational casting, meet aerospace, automobile, telecommunication
Etc. industries high demand that lightweight is developed.The invention further relates to the high-toughness heat-resistant Mg-Y-Er alloys for being suitable for gravitational casting
Preparation method belongs to industrial magnesium alloy and manufacturing field.
Background technique
For magnesium alloy as most light engineering metal material (density of magnesium is 2/3, the 1/4 of steel of aluminium), specific strength is obvious
Higher than aluminium alloy and steel, although specific stiffness is suitable with aluminium alloy and steel, it is much higher than engineering plastics, while there is good casting
Property, the series of advantages such as machinability is good, thermal conductivity is good, damping and amortization and electromagnetic shielding capability are strong and are easily recycled, navigating
The fields such as sky, space flight, automobile, electronics and defence and military have a wide range of applications.Magnesium alloy becomes substitution aluminium alloy, steel
With engineering plastics to realize light-weighted ideal material, wherein it is aluminium alloy that it is maximum, which to substitute potentiality,.Cast aluminium alloy gold has must
The toughness and tenacity and thermal stability wanted are widely used for production engine cylinder body and the parts such as cylinder cap and wheel hub at present, represent
Alloy be A354, A356 and A380.If magnesium alloy replaces cast aluminium alloy gold, it must have equivalent toughness and tenacity, and
It is inexpensive, be easy to cast.Gravitational casting refers to that molten metal injects the casting method of casting mold under terrestrial gravitation effect, including sand mold pours
Casting, model casting, permanent mold casting etc..Compared with the alloy die cast technique generallyd use at present, the investment of gravitational casting at
Originally it is greatly lowered, is the main method for producing complex geometry casting.
Earliest, the Atomic radiuses difference of main alloy element aluminium and magnesium is larger while in magnesium for the application of Mg-Al class magnesium alloy
In have biggish solid solubility, play solution strengthening and precipitation strength in the alloy.Find that a small amount of Mn is significant in nineteen twenty-five
After the corrosion resistance for improving Mg-Al-Zn system magnesium alloy, AZ (such as AZ91) and AM system magnesium alloy (such as AM60, AM50) develop into mesh
Preceding most widely used commercialization magnesium alloy.However the high temperature creep property of AZ and AM magnesium alloy is very poor, it is lower than Aluminium Alloys in Common Use
An order of magnitude is more, and the tensile strength when temperature is higher than 150 DEG C reduces rapidly, and reason is during high-temerature creep
Mg of the oversaturated α-Mg matrix in grain boundaries17Al12Mutually discontinuous precipitation.By the way that alloying element is added to improve precipitated phase
The heat resistance of characteristic (crystal structure, form and thermal stability) Lai Tigao Mg-Al alloy, but its room temperature and mechanical behavior under high temperature
It is still unable to reach the level of cast aluminium alloy gold, seriously limits its application development.For example, application publication number is CN109136701A
Patent document (a kind of sand mold gravitational casting magnesium alloy materials and preparation method thereof) disclosed in magnesium alloy component content are as follows: 3.5
~4.5wt.%Al, the mischmetal of one or more of La, Ce, Pr of 0.5~4.5wt.%, 0.2~0.5wt.%Mn,
One or more of Gd, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb of 0.01~2.5wt.% mischmetal, remaining is
Mg；The best ambient temperature mechanical properties for the alloy reported: tensile strength 231MPa, elongation percentage 11.4%.
Maximum solid solution degree of the zinc Zn in Mg is up to 6.2wt%, is the important alloy element of high-strength magnesium alloy.Typically
Mg-Zn series cast magnesium alloy includes ZK51A and ZK60A, and deforming alloy includes ZK21A, ZK31, ZK40A, ZK60A and ZK61 etc..
Increase with Zn content, the tensile strength and yield strength of alloy improve, and elongation after fracture is declined slightly, but casting character, work
Skill plasticity and welding performance deteriorate, and especially because freezing range is wide, (such as the freezing range of ZK60 is up to 265 DEG C, Journal
Of Materials Science, 45 (14) (2010) 3797-3803), cause its hot cracking tendency extremely serious.Rare earth elements RE
(rare earth element) is all to the Grain Refinement Effect of magnesium alloy to the beneficial effect and zirconium of magnesium alloy strength performance
In nineteen thirties discovery, EK31 becomes in Mg-Zr class and opens earliest in Mg-RE-Zr system (EK30, EK31, EK41)
Send out high temperature cast magnesium alloy successful.Magnesium-rare earth alloy based on rare earth RE element has excellent aging hardening effect, a variety of
It is successively developed with the novel magnesium alloy that RE is main added elements, such as WE54, WE43 alloy of Mg-Y system.Application publication number
A kind of high strength heat resistant magnesium conjunction is disclosed for the patent document (high-strength heat-resisting magnesium alloy and preparation method thereof) of CN1676646A
The preparation method of gold, the component and its weight percent of the Mg-Gd-Y-Zr (- Ca) magnesium-rare earth invented are as follows: 6~15%
Gd, 1~6%Y, 0.35~0.8%Zr, 0~1.5%Ca, the total amount of impurity element S i, Fe, Cu and Ni are less than 0.02%, surplus
For Mg.However, crystallite dimension reaches 90 μm when carrying out sand casting using such alloy, cast T6 state alloy tensile strength,
Yield strength and elongation percentage are only 295MPa, 212MPa and 2.2% (the patent text that application publication number is CN104928548A respectively
Offer a kind of disclosed high-strength heat-resistant magnesium alloy and preparation method thereof suitable for sand casting)；Simultaneously although the addition of Ca improves
The yield strength and elevated temperature strength of alloy also increased dramatically the solidification temperature range of alloy, increase hot cracking tendency, reduce conjunction
The processing performance of gold.
Since similar and atomic radius is close with the performance of Y by Er, researchers add Y usually in Mg-Er system alloy to improve
The performance of alloy, this is because addition Y element reduces the solid solubility of Er in the alloy, instead of the lattice section of prior partial Er
Put and promote the precipitation of rare-earth phase.Cheap Zn is added in Mg-RE alloy, not only to the Precipitation for regulating and controlling the alloy system
Group is woven with more obvious action, and different Zn/RE (RE is Y and/or Er) than under the conditions of can form a variety of reinforcings
Phase: the icosahedral quasicrystal body structure I phase (Mg easy to form when Zn/RE atomic ratio in alloy >=6.03Zn6RE includes
Mg3Zn6Y、Mg3Zn6Er and Mg3Zn6(Y,Er))；When Zn/RE atomic ratio is between 1.5 and 6.0 in alloy, the center of area easy to form is vertical
Square structure W phase (Mg3Zn3RE2Including Mg3Zn3Y2、Mg3Zn3Er2And Mg3Zn3(Y,Er)2) and I phase；When Zn/RE atom in alloy
W phase and long period stacking order structure LPSO phase (Mg easy to form when than between 1.0 and 1.512ZnRE includes Mg12ZnGd、
Mg12ZnY and Mg12Zn(Y,Er))；LPSO phase (the Materials easy to form when Zn/RE atomic ratio in alloy≤1.0
Letter,59(29)(2005)3801-3805；Acta Materialia,58(8)(2010)2936-2947；Journalof
Alloys and Compounds,602(2014)32-39；Acta Materialia,68(2014)325-338).A variety of Mg-
RE-Zn hardening constituent can be further improved the room temperature intensity and high-temperature behavior of magnesium alloy, application publication number CN104653693A
Patent document (rare earth wrought magnesium alloy containing trace of Al and preparation method thereof) disclosed in a kind of rare earth containing minor-alloying element Al
Wrought magnesium alloy, weight percent composition are as follows: 6.5~15.0%Gd, 3.0~5.5%Y, 2.0~4.0%Zn, 0.3~
1.5%Nd, 0.3~0.9%Zr, 0.4~1.0%Al, surplus Mg；Preparation method includes raw material preparation, alloy melting, conjunction
Golden semi-solid state extrusion, Homogenization Treatments, redeformation, cooling and pre-stretching processing and ageing strengthening processing and etc..The invention is deposited
The technical issues of are as follows: the invention provide alloy component range in, the Nd rare earth element of addition promote to be formed it is coarse
Blocky Mg5(Gd, Y, Nd) phase, Mg-RE-Zn reinforcing phase amount, which is accordingly reduced, causes performance to decline；Rare earth Gd, Y simultaneously
Too high with Nd content, expensive rare earth price and complicated preparation process cause the invention to be difficult industrially to carry out on a large scale
Using.Application publication number is patent document Chinese invention patent ZL201110155378.5 (the spontaneous quasi-crystalline substance of CN102212727A
Enhance Mg-Zn-Y alloy and its method of smelting) disclosed in Authigenic quasicrystal-reinforced Mg-Zn-Y alloy chemical component quality percentage group
Become: 3.0~10.0%Zn, 0.5~3.0%Y, 0.05~1.0%Al-Ti-C, surplus are Mg and inevitable impurity；Its
Preparation method includes melting and casting, and Al-Ti-C intermediate alloy is added when being cooled to 700~720 DEG C in the melt after melting, molten
Ultrasonic wave is introduced in body, is cast and is made after ultrasonication；The invention Authigenic quasicrystal-reinforced Mg-Zn-Y alloy tensile strength can
Up to 260MPa, elongation percentage 10.6%.The inventive technique there are still following problems: the Zn/Y mass of the alloy than too high levels,
Icosahedral quasicrystal phase is formed, while its freezing range is excessive, is also easy to produce casting flaw；And ultrasonication is introduced, it operates excessively multiple
It is miscellaneous, it is difficult industrially to be applied on a large scale.Under the conditions of conventional coagulation, Mg-Y-Er-Zn alloy grain is coarse, analysis
Usually it is in mutually out coarse reticular structure, is degrading its mechanical property, it is necessary to passes through thermal deformation or heat treatment solid solution and timeliness
Precipitate size is adjusted to play the effect of its hardening constituent.
Mg-Y-Er-Zn alloy is usually added into Zr as grain refining element, to refine its coarse microstructure.At present
Reported plus Zr mode has halogen, Zn-Zr intermediate alloy and Mg-Zr intermediate alloy of sponge Zr, Zr etc., wherein in Mg-Zr
Between alloy have the advantages that it is easy to use, be mingled with less and good in refining effect, be the major way for being currently fed Zr.Application publication number is
The patent document (a kind of the anti-flaming Mg-Gd-Y-Zn-Zr alloy of high-strength anticorrosion and preparation method thereof) of CN106756370A is disclosed
A kind of anti-flaming Mg-Gd-Y-Zn-Zr alloy of high-strength anticorrosion and preparation method thereof, the Mg-Gd-Y-Zn-Zr alloy includes each
Component and its mass percent are as follows: 3.0%≤Gd≤9.0%, 1.0%≤Y≤6.0%, 0.5%≤Zn≤3.0%, 0.2%
≤ Zr≤1.5%, surplus are Mg and inevitable impurity.At present plus Zr crystal grain refinement still has many problems: firstly,
The preparation process of Mg-Zr intermediate alloy is complicated, energy consumption is high, leads to that it is expensive, therefore is refined using Mg-Zr intermediate alloy brilliant
Grain can improve product cost；Secondly, the chemical activity of Zr is strong, it is easy at high temperature and atmosphere, furnace gas reacts, when use steel earthenware
When crucible, when melt temperature is higher than 750 DEG C, Zr is easy to react with the Fe in crucible, generates stable intermetallic compound
Fe2Zr, the loss that these result in Zr are high；Many Zr in Mg-Zr intermediate alloy are in the form of large scale simple substance Zr particle
In the presence of since the fusing point of Zr is high (1852 DEG C), Zr particle is difficult to dissolve in melt, in addition the density of Zr is much larger than Serum Magnesium
(density of Zr is 6.52g/cm to density3, the density of pure Serum Magnesium is 1.58g/cm3), it is easy to be deposited to crucible bottom, leads to Zr
Recovery rate it is low.
Summary of the invention
The present invention is unable to reach the casting aluminium such as A380 to solve existing cast magnesium alloy because of obdurability, heat resistance deficiency
The performance of alloy, the professional problem for causing its application to be extremely restricted, provides a kind of high-toughness heat-resistant Mg- of gravitational casting
Y-Er alloy and preparation method thereof, for the alloy after gravitational casting is heat-treated, the room temperature tensile intensity of alloy is 296MPa, is extended
Rate 18%；Drawing by high temperature tensile strength is 212MPa, elongation percentage 23% at 200 DEG C.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical solutions:
High-toughness heat-resistant Mg-Y-Er alloy of the present invention suitable for gravitational casting, including following mass percent
Element: 4.0~10.0%RE, 2.0~6.0%Zn, 0.5~1.2%Al, 0.1~0.3%Mn, 0.01~0.08%M, surplus
For Mg and other inevitable impurity, wherein RE is the combination of Y and Er, one or both of M Ti, B.
High-toughness heat-resistant Mg-Y-Er alloy innovative point of the present invention suitable for gravitational casting:
(1) in alloy design in addition to common metal Zn, Al, Mn and a small amount of Ti and B element, the present invention selects heavy rare earth
Element Y and Er is as its alloy element.Alloying heavy rare earth RE element (RE is Y and Er) and Zn and matrix Mg element form three
First Mg-RE-Zn hardening constituent, special Zn/RE mass ratio are 0.2~0.8, and wherein the mass ratio of Y/Er is 0.25~4 in RE composition
In range, on the one hand, alloy of the present invention primarily forms long period stacking order structure LPSO phase (Mg12ZnRE includes Mg12ZnY、
Mg12ZnEr and Mg12Zn (Y, Er)) and face-centred cubic structure W phase (Mg3Zn3RE2Including Mg3Zn3Y2、Mg3Zn3Er2And Mg3Zn3
(Y,Er)2), it is high-melting-point phase；With binary Mg-Y hardening constituent ratio, ternary Mg-RE-Zn hardening constituent LPSO and W are in magnesium matrix
High-temperature stable it is more preferable, avoid the reduced performance as caused by precipitation strength phased soln, effectively enhance the height of gravitational casting
The room-temperature mechanical property and high-temperature behavior of tough heat-resisting Mg-Y-Er alloy, the high temperature creep property especially at 300 DEG C improve
It is more than an order of magnitude.On the other hand, the present invention solves traditional Mg-Zn-RE alloy because excessively high Zn content causes to solidify
Section is excessive and is also easy to produce thermal fragmentation defect, thus the technical problem for causing alloy toughness and tenacity and Production Practice of Casting Technologies to reduce.
(2) rare earth RE element added by the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting is that the mixing of Y and Er is dilute
Soil, without the mischmetal using Y or Er and common Ce, La, Nd, Pr, reason is: on the one hand, if added in alloy
Add and often use rare earth element containing Ce, La, Nd, Pr, with the raising of the common rare earth element content such as Ce, the setting temperature model of alloy
Enclosing to become larger causes segregation and Production Practice of Casting Technologies to be deteriorated, casting flaw easy to form；On the other hand, with Ce etc. commonly use it is dilute
The raising of Eupolyphoge sinensis cellulose content, main hardening constituent W, LPSO phase that alloy is precipitated are gradually converted into (Mg, Zn)12RE phase, leads to alloy
W, LPSO of middle stable components strengthen phase amount and sharply reduce, so as to cause precipitating reinforcing effect reduction.In addition, Er is promoting conjunction
Plasticity is influenced less while golden intensity, Y mixes addition with Er to the promotion of alloy property with more better than being individually added into
Composite effect.
(3) Mg-Y-Er-Zn alloy precipitated phase under the conditions of conventional coagulation is usually in coarse reticular structure, is degrading it
Mechanical property, it is often necessary to which precipitate size is adjusted to play its hardening constituent by thermal deformation or heat treatment solid solution and timeliness
Effect.Such alloy is usually added into Zr as grain refining element, closes in alloying element of the invention containing Al, Mn and Rare Earth Y
Gold element, these elements form Al in conjunction with Zr3The compounds such as Zr and being deposited to crucible bottom makes zirconium not play Grain Refinement Effect.
On the other hand, studies have shown that the thermal structure stability of the Mg-Y-Er-Zn alloy of addition Zr refinement is poor, in 550 DEG C of heat preservations
Crystal grain is sharply roughened, and high-temperature behavior is caused to be greatly lowered.To solve the above-mentioned problems, 0.5- is added in alloy of the invention
1.2%Al substitutes Zr, forms the high-melting-point Al of disperse2Y、Al3Er phase has not only refined the tissue of alloy, but also contour with LPSO
Temperature mutually ensures the high-temperature stability of Magnesium Alloy.Al plays composite crystal grain fining together with a small amount of Ti and B simultaneously, into
Step refining alloy structure, improves the obdurability of alloy.A small amount of Mn is added in alloying element of the invention, it can not only
The formation for promoting LPSO phase improves the high-temperature stability of alloy, and improves the corrosion resistance of magnesium alloy.
(4) in order to reduce the hot cracking tendency in Mg-Gd-Zn alloy casting process, limit Y/Er's in alloy of the invention
Mass ratio is that 0.25~4, Zn/RE mass ratio is 0.2~0.8 and (Zn+Al)/RE mass ratio is 0.3~1.0.In this quality
Than under, alloy of the invention obtains relatively narrow freezing range, to overcome the heat in Mg-Y-Er-Zn alloy casting process
Tendency is split, the Production Practice of Casting Technologies of alloy is improved.
The preparation method of the above-mentioned high-toughness heat-resistant Mg-Y-Er alloy suitable for gravitational casting, includes the following steps:
(1) with due regard to after scaling loss, by above-mentioned Mg-Y-Er alloying component and stoichiometric ratio, (the industry of raw material needed for calculating
Pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot, Mg-Y intermediate alloy, Mg-Er intermediate alloy, Mg-Mn intermediate alloy, among Al-Ti
Alloy, Al-Ti-B intermediate alloy and Al-B intermediate alloy) dosage；By technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot,
Mg-Y intermediate alloy, Mg-Er intermediate alloy and Mg-Mn intermediate alloy remove removing oxide layer and dry to be preheated to 200 DEG C.
(2) after the technical pure magnesium ingot for accounting for crucible height 25% being fused into molten bath at 680 DEG C, it is passed through protective gas, is added
Enter remaining magnesium ingot.The protective gas is argon gas, or the SF for being 0.2% containing volume fraction6And CO2Mixed gas (i.e. SF6Body
Fraction is 0.2%, CO2Volume fraction be 99.8%).
(3) after magnesium ingot all fusing, 700 DEG C are warming up to, by industrial-purity zinc and Mg-Y, Mg-Er and Mg-Mn intermediate alloy
Divide more (2~4) secondary additions, and keep temperature constant at 700 DEG C, is stirred until all melting, and keep the temperature 30min.It is described
Mg-Y intermediate alloy is MgY25 or MgY30, and the Mg-Er intermediate alloy is MgEr25 or MgEr30, is closed among the Mg-Mn
Gold is MgMn10.
(4) 40~60min before gravitational casting is warming up to 730 DEG C, closes among technical pure aluminium ingot to be sequentially added, Al-Ti
Gold, Al-Ti-B intermediate alloy, Al-B intermediate alloy all after fusing, are added refining agent and are refined, furnace temperature is risen to 750 DEG C
Heat preservation stands 10~20min, and promotion is mingled with sedimentation, obtains magnesium alloy fused mass.The Al-Ti-B intermediate alloy is AlTi5B1, institute
Stating Al-B intermediate alloy is AlB3 or AlB8, and the Al-Ti intermediate alloy is AlTi5 or AlTi10.The quality of the refining agent
Percent composition are as follows: 55%KCl, 25%CaCl2, 5%CaF2, 15%BaCl2.The refining agent additive amount is raw material gross weight
1.0~3.5%, refining temperature when refining agent refining is added is 720~730 DEG C, the mixing time 10 of refining treatment~
15min。
(5) magnesium alloy fused mass is cooled between 720~740 DEG C and is removed the gred, poured into melt by gravitational casting
It is pre-heated in 25~150 DEG C of sand mold type molds or 180~250 DEG C of metal type dies, it is tough resistance to that the height is obtained after cooling
Mg-Y-Er alloy is made in hot-cast.
(6) height needed for successively carrying out second level solution treatment, artificial aging processing acquisition to resulting cast alloy is tough
Heat-resistant cast Mg-Y-Er alloy.
The second level solutionizing step of the high-toughness heat-resistant Mg-Y-Er alloy suitable for gravitational casting: by cast alloy
It is put into solid solution furnace, is warming up to 200 DEG C with 5 DEG C/min, being passed through protective gas, (protective gas is argon gas, or containing volume point
The SF that number is 0.2%6And CO2Mixed gas (i.e. SF6Volume fraction is 0.2%, CO2Volume fraction be 99.8%)), after
It is continuous to be warming up to 480~490 DEG C of first order solid solubility temperature with 5 DEG C/min, keep the temperature 36~48h；Then it is warming up at a slow speed with 10 DEG C/h
535~545 DEG C of second level solid solution temperature, water hardening is carried out on fast transfer to quenching unit after keeping the temperature 1~2h.
The artificial aging of the high-toughness heat-resistant Mg-Y-Er alloy suitable for gravitational casting is handled, the artificial aging
The step for the treatment of process are as follows: quenched alloy is put into aging furnace, artificial aging treatment temperature is warming up to 5 DEG C/min
It 185~215 DEG C, comes out of the stove after keeping the temperature 12~36h and is air-cooled to room temperature.
The second level solid solution treatment process parameter are as follows: 480~490 DEG C of first order solid solubility temperature, 36~48h of soaking time；
535~545 DEG C of second level solid solubility temperature, 1~2h of soaking time；
The artificial aging treatment process parameter: 185~215 DEG C of aging temp, 12~36h of soaking time.
The innovative point of the high-toughness heat-resistant Mg-Y-Er alloy preparation method of gravitational casting provided by the invention: (1) 700
DEG C Mg-Y, Mg-Er intermediate alloy of easy scaling loss is added, and keeps the temperature fusing in this low-temperature melt, improves Rare Earth Y and the receipts of Er
Yield；(2) refining treatment, which uses, is free of MgCl2Dedicated refining agent, further reduced the burning of Rare Earth Y and Er in refining process
Damage；(3) heat treatment of high-toughness heat-resistant casting Mg-Y-Er alloy of the present invention includes solution treatment and ageing treatment two
Process.480~490 DEG C of the first order temperature of second level solution treatment, 36~48h of time sufficiently promote Y, Er and Zn in magnesium matrix
In solubility, eliminate the coarse precipitated phase such as LPSO；535~545 DEG C, 1~2h of time of the first order temperature of second level solution treatment,
The coarse phase such as undissolved LPSO is further eliminated in short time heat preservation, is eliminated existing regional segregation, microsegregation in casting, is made
The homogenization of composition of alloy is obtained, to improve the performance of alloy, and prevents heat treatment burn-off phenomenon.Furnace temperature is maintained at
185~215 DEG C, 12~36h of heat preservation carries out ageing treatment, and long period timeliness finally makes the transgranular precipitation Nano grade of alloy, more
Tiny hardening constituent is dissipated, so that alloy be made to have both excellent room temperature and high-temperature behavior.Heat treatment through the invention, alloying component
To stablize, crystal grain is not obviously grown up, and the performance of alloy is significantly improved, and method is simple, securely and reliably, operation side
Just.
The present invention have it is following the utility model has the advantages that
High-toughness heat-resistant Mg-Y-Er alloy suitable for gravitational casting of the invention through gravitational casting, second level solution treatment with
After artificial aging heat treatment, room temperature tensile intensity is 296MPa, elongation percentage 18%；Drawing by high temperature tensile strength is at 200 DEG C
212MPa, elongation percentage 23%, comprehensive performance reach the performance of cast aluminium alloy gold；Provided preparation method have simple process,
The advantages that high-efficient, suitable large-scale production, meet the high-end need that aerospace, military project, automobile and other industries develop lightweight
It asks.
Detailed description of the invention
Fig. 1 is the alloy microstructure figure prepared in embodiment 5.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment 1
The weight percent of the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting are as follows: press stoichiometric, 1.0%Er,
3.0%Y, 3.2%Zn, 0.8%Al, 0.3%Mn, 0.01%Ti, 0.01%B, surplus are Mg and other inevitable impurity.
Preparation method: (1) with due regard to after scaling loss, by above-mentioned Mg-Y-Er alloying component and stoichiometric ratio, needed for calculating
The dosage of raw material；Technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot and MgY30, MgEr30 and MgMn10 intermediate alloy are gone
Removing oxide layer and dry be preheated to 200 DEG C.
(2) after the technical pure magnesium ingot for accounting for crucible height 25% being fused into molten bath at 680 DEG C, it is passed through protective gas argon
Remaining magnesium ingot is added in gas.
(3) after magnesium ingot all fusing, 700 DEG C are warming up to, among industrial-purity zinc and MgY30, MgEr30 and MgMn10
2~4 additions of alloy point, and keep temperature constant at 700 DEG C, it is stirred until all melting, and keep the temperature 30min.
(4) 40~60min before gravitational casting, is warming up to 730 DEG C, closes among technical pure aluminium ingot to be sequentially added, AlTi5
Gold, AlB3 intermediate alloy are all after fusing, and the refining agent that raw material weight 1% is added is refined, 730 DEG C of the temperature of refining, essence
The mixing time 10min of processing is refined, refining agent component is by mass percentage are as follows: 55%KCl, 25%CaCl2, 5%CaF2, 15%
BaCl2.Furnace temperature is risen to 750 DEG C of heat preservations standings to promote within 10 minutes to be mingled with sedimentation, obtains magnesium alloy fused mass.
(5) magnesium alloy fused mass is cooled to 720 DEG C, skims surface scum, poured into melt by gravitational casting
It is preheated in 180 DEG C of metal type dies, the high-toughness heat-resistant casting Mg-Y-Er alloy is obtained after cooling.
(6) second level solution treatment is successively carried out to resulting cast alloy, casting alloy is put into solid solution furnace, with 5 DEG C/
Min is warming up to 200 DEG C, is passed through the SF containing 0.2% volume fraction6And CO2Mixed gas, continue with 5 DEG C/min to be warming up to first
480 DEG C of solid solubility temperature of grade keeps the temperature 36h, is then warming up to 535 DEG C of second level solid solubility temperature at a slow speed with 10 DEG C/h, keeps the temperature fast after 1h
Speed, which is transferred on quenching unit, carries out water hardening.
(7) artificial aging processing is carried out to the casting alloy after solution treatment, quenched alloy is put into aging furnace,
185 DEG C of artificial aging treatment temperature are warming up to 5 DEG C/min, comes out of the stove after heat preservation 12h and is air-cooled to room temperature, obtains described be suitable for again
The high-toughness heat-resistant Mg-Y-Er alloy of power casting.
High-toughness heat-resistant Mg-Y-Er alloy obtained is subjected to a. room temperature tensile test respectively；B.200 DEG C, 200 hours heat
In 200 DEG C of progress high temperature tensile properties tests after exposure treatment.The room temperature tensile for the high-toughness heat-resistant magnesium alloy that this example obtains
Intensity is 268MPa, elongation percentage 23%；Drawing by high temperature tensile strength is 183MPa, elongation percentage 33% at 200 DEG C.
Embodiment 2
The weight percent of the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting are as follows: press stoichiometric, 1.2%Er,
4.8%Y, 2.0%Zn, 1.2%Al, 0.1%Mn, 0.08%Ti, surplus are Mg and other inevitable impurity.
Preparation method: (1) with due regard to after scaling loss, by above-mentioned Mg-Y-Er alloying component and stoichiometric ratio, needed for calculating
The dosage of raw material；Technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot and MgY30, MgEr30 and MgMn10 intermediate alloy are gone
Removing oxide layer and dry be preheated to 200 DEG C；By the ingredient and stoichiometric ratio of alloy, the dosage of raw material needed for calculating.
(2) it after the technical pure magnesium ingot for accounting for crucible height 25% being fused into molten bath at 680 DEG C, is passed through protective gas and contains
The SF of 0.2% volume fraction6And CO2Mixed gas, remaining magnesium ingot is added.
(3) after magnesium ingot all fusing, 700 DEG C are warming up to, among industrial-purity zinc and MgY30, MgEr30 and MgMn10
2~4 additions of alloy point, and keep temperature constant at 700 DEG C, it is stirred until all melting, and keep the temperature 30min.
(4) 40~60min before gravitational casting, is warming up to 730 DEG C, closes among technical pure aluminium ingot to be sequentially added, AlTi10
After golden all fusings, the refining agent that raw material weight 3.5% is added is refined, 730 DEG C of the temperature of refining, the stirring of refining treatment
Time 10min, refining agent component is by mass percentage are as follows: 55%KCl, 25%CaCl2, 5%CaF2, 15%BaCl2.By furnace temperature
It rises to 750 DEG C of heat preservations standings to promote within 10 minutes to be mingled with sedimentation, obtains magnesium alloy fused mass.
(5) magnesium alloy fused mass is cooled to 740 DEG C, skims surface scum, poured into melt by gravitational casting
It is preheated in 250 DEG C of metal type dies, the high-toughness heat-resistant casting Mg-Y-Er alloy is obtained after cooling.
(6) second level solution treatment is successively carried out to resulting cast alloy, casting alloy is put into solid solution furnace, with 5 DEG C/
Min is warming up to 200 DEG C, is passed through protective gas argon gas, continues to be warming up to 490 DEG C of first order solid solubility temperature with 5 DEG C/min, heat preservation
Then 48h is warming up at a slow speed 545 DEG C of second level solid solubility temperature with 10 DEG C/h, fast transfer is enterprising to quenching unit after keeping the temperature 2h
Row water hardening.
(7) artificial aging processing is carried out to the casting alloy after solution treatment, quenched alloy is put into aging furnace,
215 DEG C of artificial aging treatment temperature are warming up to 5 DEG C/min, comes out of the stove after heat preservation 36h and is air-cooled to room temperature, obtains described be suitable for again
The high-toughness heat-resistant Mg-Y-Er alloy of power casting.
High-toughness heat-resistant Mg-Y-Er alloy obtained is subjected to a. room temperature tensile test respectively；B.200 DEG C, 200 hours heat
In 200 DEG C of progress high temperature tensile properties tests after exposure treatment.The room temperature tensile for the high-toughness heat-resistant magnesium alloy that this example obtains
Intensity is 281MPa, elongation percentage 20%；Drawing by high temperature tensile strength is 194MPa, elongation percentage 27% at 200 DEG C.
Embodiment 3
The weight percent of the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting are as follows: press stoichiometric, 8.0%Er,
2.0%Y, 2.0%Zn, 1.0%Al, 0.2%Mn, 0.05%Ti, 0.03%B, surplus are Mg and other inevitable impurity.
Preparation method: (1) with due regard to after scaling loss, by above-mentioned Mg-Y-Er alloying component and stoichiometric ratio, needed for calculating
The dosage of raw material；Technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot and MgY30, MgEr30 and MgMn10 intermediate alloy are gone
Removing oxide layer and dry be preheated to 200 DEG C.
(2) after the technical pure magnesium ingot for accounting for crucible height 25% being fused into molten bath at 680 DEG C, it is passed through protective gas argon
Remaining magnesium ingot is added in gas.
(3) after magnesium ingot all fusing, 700 DEG C are warming up to, among industrial-purity zinc and MgY30, MgEr30 and MgMn10
2~4 additions of alloy point, and keep temperature constant at 700 DEG C, it is stirred until all melting, and keep the temperature 30min.
(4) 40~60min before gravitational casting, is warming up to 730 DEG C, closes among technical pure aluminium ingot to be sequentially added, AlTi5B1
Gold, AlB8 intermediate alloy are all after fusing, and the refining agent that raw material weight 2.5% is added is refined, 720 DEG C of the temperature of refining,
The mixing time 15min of refining treatment, refining agent component is by mass percentage are as follows: 55%KCl, 25%CaCl2, 5%CaF2、
15%BaCl2.Furnace temperature is risen to 750 DEG C of heat preservations standings to promote within 10 minutes to be mingled with sedimentation, obtains magnesium alloy fused mass.
(5) magnesium alloy fused mass is cooled to 730 DEG C, skims surface scum, melt is poured by gravitational casting and is entered the room
In the sand mold type molds of 25 DEG C of temperature, the high-toughness heat-resistant casting Mg-Y-Er alloy is obtained after cooling.
(6) resulting cast alloy successively carries out second level solution treatment, and casting alloy is put into solid solution furnace, with 5 DEG C/
Min is warming up to 200 DEG C, is passed through protective gas argon gas, continues to be warming up to 485 DEG C of first order solid solubility temperature with 5 DEG C/min, heat preservation
Then 42h is warming up at a slow speed 540 DEG C of second level solid solubility temperature, after heat preservation 1.5h on fast transfer to quenching unit with 10 DEG C/h
Carry out water hardening.
(7) artificial aging processing is carried out to the casting alloy after solution treatment, quenched alloy is put into aging furnace,
200 DEG C of artificial aging treatment temperature are warming up to 5 DEG C/min, heat preservation is come out of the stove afterwards for 24 hours is air-cooled to room temperature, obtains described be suitable for again
The high-toughness heat-resistant Mg-Y-Er alloy of power casting.
High-toughness heat-resistant Mg-Y-Er alloy obtained is subjected to a. room temperature tensile test respectively；B.200 DEG C, 200 hours heat
In 200 DEG C of progress high temperature tensile properties tests after exposure treatment.The room temperature tensile for the high-toughness heat-resistant magnesium alloy that this example obtains
Intensity is 296MPa, elongation percentage 18%；Drawing by high temperature tensile strength is 212MPa, elongation percentage 23% at 200 DEG C.
Embodiment 4
The weight percent of the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting are as follows: press stoichiometric, 4.0%Er,
4.0%Y, 6.0%Zn, 0.5%Al, 0.2%Mn, 0.08%B, surplus are Mg and other inevitable impurity.
Preparation method: (1) with due regard to after scaling loss, by above-mentioned Mg-Y-Er alloying component and stoichiometric ratio, needed for calculating
The dosage of raw material；Technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot and MgY30, MgEr30 and MgMn10 intermediate alloy are gone
Removing oxide layer and dry be preheated to 200 DEG C.
(2) it after the technical pure magnesium ingot for accounting for crucible height 25% being fused into molten bath at 680 DEG C, is passed through containing 0.2% volume
The SF of score6And CO2Hybrid protection gas, remaining magnesium ingot is added.
(3) after magnesium ingot all fusing, 700 DEG C are warming up to, among industrial-purity zinc and MgY30, MgEr30 and MgMn10
2~4 additions of alloy point, and keep temperature constant at 700 DEG C, it is stirred until all melting, and keep the temperature 30min.
(4) 40~60min before gravitational casting, is warming up to 730 DEG C, technical pure aluminium ingot to be sequentially added, AlB8 intermediate alloy
All after fusing, the refining agent that raw material weight 3.0% is added is refined, 720 DEG C of the temperature of refining, when the stirring of refining treatment
Between 15min, refining agent component is by mass percentage are as follows: 55%KCl, 25%CaCl2, 5%CaF2, 15%BaCl2.By furnace temperature liter
10 minutes are stood to 750 DEG C of heat preservations to promote to be mingled with sedimentation, obtain magnesium alloy fused mass.
(5) magnesium alloy fused mass is cooled to 720 DEG C, skims surface scum, poured into melt by gravitational casting
It is preheated in 150 DEG C of sand mold type molds, the high-toughness heat-resistant casting Mg-Y-Er alloy is obtained after cooling.
(6) second level solution treatment is successively carried out to resulting cast alloy, casting alloy is put into solid solution furnace, with 5 DEG C/
Min is warming up to 200 DEG C, is passed through the SF containing 0.2% volume fraction6And CO2Hybrid protection gas, continuation be warming up to 5 DEG C/min
480 DEG C of first order solid solubility temperature, 48h is kept the temperature, is then warming up to 535 DEG C of second level solid solubility temperature at a slow speed with 10 DEG C/h, keeps the temperature 2h
Water hardening is carried out on fast transfer to quenching unit afterwards.
(7) artificial aging processing is carried out to the casting alloy after solution treatment, quenched alloy is put into aging furnace,
185 DEG C of artificial aging treatment temperature are warming up to 5 DEG C/min, comes out of the stove after heat preservation 36h and is air-cooled to room temperature, obtains described be suitable for again
The high-toughness heat-resistant Mg-Y-Er alloy of power casting.
High-toughness heat-resistant Mg-Y-Er alloy obtained is subjected to a. room temperature tensile test respectively；B.200 DEG C, 200 hours heat
In 200 DEG C of progress high temperature tensile properties tests after exposure treatment.The room temperature tensile for the high-toughness heat-resistant magnesium alloy that this example obtains
Intensity is 292MPa, elongation percentage 21%；Drawing by high temperature tensile strength is 207MPa, elongation percentage 25% at 200 DEG C.
Embodiment 5
The weight percent of the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting are as follows: press stoichiometric, 4.0%Er,
2.0%Y, 4.2%Zn, 1.2%Al, 0.3%Mn, 0.04%Ti, 0.04%B, surplus are Mg and other inevitable impurity.
Preparation method: (1) with due regard to after scaling loss, by above-mentioned Mg-Y-Er alloying component and stoichiometric ratio, needed for calculating
The dosage of raw material；Technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot and MgY30, MgEr30 and MgMn10 intermediate alloy are gone
Removing oxide layer and dry be preheated to 200 DEG C.
(2) after the technical pure magnesium ingot for accounting for crucible height 25% being fused into molten bath at 680 DEG C, it is passed through protective gas argon
Remaining magnesium ingot is added in gas.
(3) after magnesium ingot all fusing, 700 DEG C are warming up to, among industrial-purity zinc and MgY30, MgEr30 and MgMn10
2~4 additions of alloy point, and keep temperature constant at 700 DEG C, it is stirred until all melting, and keep the temperature 30min.
(4) 40~60min before gravitational casting is warming up to 730 DEG C, to the technical pure aluminium ingot, AlTi10 intermediate alloy,
After AlB3 intermediate alloy is sequentially added and all melted, the refining agent that raw material weight 2.0% is added is refined, the temperature of refining
730 DEG C, the mixing time 10min of refining treatment, refining agent component is by mass percentage are as follows: 55%KCl, 25%CaCl2, 5%
CaF2, 15%BaCl2.Furnace temperature is risen to 750 DEG C of heat preservations standings to promote within 10 minutes to be mingled with sedimentation, obtains magnesium alloy fused mass.(5) will
The magnesium alloy fused mass is cooled to 740 DEG C, skims surface scum, pours into melt by gravitational casting and is pre-heated to 210 DEG C
In metal type dies, the high-toughness heat-resistant casting Mg-Y-Er alloy is obtained after cooling.
(6) second level solution treatment is successively carried out to resulting cast alloy, casting alloy is put into solid solution furnace, with 5 DEG C/
Min is warming up to 200 DEG C, is passed through the SF containing 0.2% volume fraction6And CO2Hybrid protection gas, continuation be warming up to 5 DEG C/min
490 DEG C of first order solid solubility temperature, 36h is kept the temperature, is then warming up to 545 DEG C of second level solid solubility temperature at a slow speed with 10 DEG C/h, keeps the temperature 1h
Water hardening is carried out on fast transfer to quenching unit afterwards.
(7) artificial aging processing is carried out to the casting alloy after solution treatment, quenched alloy is put into aging furnace,
215 DEG C of artificial aging treatment temperature are warming up to 5 DEG C/min, comes out of the stove after heat preservation 12h and is air-cooled to room temperature, obtains described be suitable for again
The high-toughness heat-resistant Mg-Y-Er alloy of power casting.
High-toughness heat-resistant Mg-Y-Er alloy obtained is subjected to a. room temperature tensile test respectively；B.200 DEG C, 200 hours heat
In 200 DEG C of progress high temperature tensile properties tests after exposure treatment.The room temperature tensile for the high-toughness heat-resistant magnesium alloy that this example obtains
Intensity is 286MPa, elongation percentage 22%；Drawing by high temperature tensile strength is 201MPa, elongation percentage 29% at 200 DEG C.The present embodiment obtains
The magnesium alloy metallographic structure figure obtained is as shown in Figure 1.
Above-described embodiment is not limit the invention in any way, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution fall within the scope of protection of the present invention.
Claims (13)
1. being suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting, it is characterised in that the element including following mass percent:
4.0~10.0%RE, 2.0~6.0%Zn, 0.5~1.2%Al, 0.1~0.3%Mn, 0.01~0.08%M, surplus be Mg and
Other inevitable impurity；Wherein, RE is the combination of Y and Er, one or both of M Ti, B.
2. being suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting as described in claim 1, it is characterised in that: Zn/RE matter
Amount is than being 0.2~0.8, wherein the mass ratio of Y/Er is 0.25~4.
3. being suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting as described in claim 1, it is characterised in that: (Zn+
Al)/RE mass ratio is 0.3~1.0.
4. the preparation side of the high-toughness heat-resistant Mg-Y-Er alloy as claimed in any one of claims 1 to 3 suitable for gravitational casting
Method, it is characterised in that include the following steps:
(1) Mg-Y-Er alloying component and stoichiometric ratio are pressed, technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot, Mg-Y are calculated
Among intermediate alloy, Mg-Er intermediate alloy, Mg-Mn intermediate alloy, Al-Ti intermediate alloy, Al-Ti-B intermediate alloy and Al-B
The dosage of alloy；By technical pure magnesium ingot, industrial-purity zinc, technical pure aluminium ingot, Mg-Y intermediate alloy, Mg-Er intermediate alloy, Mg-Mn
Intermediate alloy removes removing oxide layer and dries to be preheated to 200 DEG C；
(2) after the technical pure magnesium ingot for accounting for crucible height 25% being fused into molten bath, it is passed through protective gas, remaining magnesium ingot is added；
(3) after magnesium ingot all fusing after, be warming up to 700 DEG C, by industrial-purity zinc, Mg-Y intermediate alloy, Mg-Er intermediate alloy and
Mg-Mn intermediate alloy is added several times, and keeps temperature constant at 700 DEG C, is stirred until all melting, and keep the temperature
30min；
(4) 40~60min before gravitational casting, is warming up to 730 DEG C, technical pure aluminium ingot to be sequentially added, Al-Ti intermediate alloy,
Al-Ti-B intermediate alloy, Al-B intermediate alloy all after fusing, are added refining agent and are refined, furnace temperature is risen to 750 DEG C of heat preservations
10~20min is stood, promotion is mingled with sedimentation, obtains magnesium alloy fused mass；
(5) magnesium alloy fused mass is cooled between 720~740 DEG C and is removed the gred, poured into melt in advance by gravitational casting
In the sand mold type molds of heat to 25~150 DEG C or 180~250 DEG C of metal type dies, the high-toughness heat-resistant casting is obtained after cooling
Make Mg-Y-Er alloy；
(6) second level solution treatment is successively carried out to resulting cast alloy, artificial aging processing obtains required high-toughness heat-resistant
Cast Mg-Y-Er alloy.
5. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting, feature exist as claimed in claim 4
In: the Mg-Y intermediate alloy is MgY25 or MgY30, and the Mg-Er intermediate alloy is MgEr25 or MgEr30, the Mg-Mn
Intermediate alloy is MgMn10, and the Al-Ti-B intermediate alloy is AlTi5B1, and the Al-B intermediate alloy is AlB3 or AlB8, institute
Stating Al-Ti intermediate alloy is AlTi5 or AlTi10.
6. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting, feature exist as claimed in claim 4
In: the mass percent component of the refining agent are as follows: 55%KCl, 25%CaCl2, 5%CaF2, 15%BaCl2。
7. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting, feature exist as claimed in claim 4
In: the refining agent additive amount is the 1.0~3.5% of raw material gross weight.
8. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting, feature exist as claimed in claim 4
In: refining temperature when refining agent refining is added is 720~730 DEG C, 10~15min of mixing time of refining treatment.
9. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting, feature exist as claimed in claim 4
In: the second level solid solution treatment process parameter are as follows: 480~490 DEG C of first order solid solubility temperature, 36~48h of soaking time；The second level
535~545 DEG C of solid solubility temperature, 1~2h of soaking time.
10. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting as claimed in claim 9, feature
It is: the step of the second level solid solution treatment process are as follows: cast alloy is put into solid solution furnace, is warming up to 200 with 5 DEG C/min
DEG C, it is passed through protective gas, continues to be warming up to 480~490 DEG C of first order solid solubility temperature with 5 DEG C/min, keeps the temperature 36~48h；Then
535~545 DEG C of second level solid solution temperature are warming up at a slow speed with 10 DEG C/h, keep the temperature after 1~2h fast transfer to quenching unit
Upper carry out water hardening.
11. the preparation method of the high-toughness heat-resistant Mg-Y-Er alloy suitable for gravitational casting as described in claim 4 or 10,
It is characterized in that: the SF that the protective gas is argon gas or volume fraction is 0.2%6And CO2Mixed gas.
12. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting as claimed in claim 4, feature
It is: the artificial aging treatment process parameter: 185~215 DEG C of aging temp, 12~36h of soaking time.
13. the preparation method suitable for the high-toughness heat-resistant Mg-Y-Er alloy of gravitational casting as claimed in claim 12, feature
It is: the step of the artificial aging treatment process are as follows: quenched alloy is put into aging furnace, is warming up to 5 DEG C/min
It 185~215 DEG C of artificial aging treatment temperature, comes out of the stove after keeping the temperature 12~36h and is air-cooled to room temperature.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113755734A (en) * | 2021-08-30 | 2021-12-07 | 西安交通大学 | High-strength high-plasticity heat-resistant magnesium alloy with LPSO phase and SFs structure and preparation method thereof |
| CN113913659A (en) * | 2021-10-09 | 2022-01-11 | 哈尔滨工程大学 | High-temperature high-strength magnesium alloy by regulating and controlling proportion of composite rare earth and Zn and preparation method thereof |
| CN115386747A (en) * | 2022-08-02 | 2022-11-25 | 山西银光华盛镁业股份有限公司 | Method for preparing ZM5 and ZM6 magnesium alloy |
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| JP2008069418A (en) * | 2006-09-14 | 2008-03-27 | Kumamoto Univ | High strength magnesium alloy with excellent corrosion resistance |
| CN102994834A (en) * | 2011-09-09 | 2013-03-27 | 江汉大学 | Heatproof magnesium alloy containing Nb |
| CN104928547A (en) * | 2015-07-12 | 2015-09-23 | 河北钢研德凯科技有限公司 | High-strength and high-temperature-resistant magnesium alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008069418A (en) * | 2006-09-14 | 2008-03-27 | Kumamoto Univ | High strength magnesium alloy with excellent corrosion resistance |
| CN102994834A (en) * | 2011-09-09 | 2013-03-27 | 江汉大学 | Heatproof magnesium alloy containing Nb |
| CN104928547A (en) * | 2015-07-12 | 2015-09-23 | 河北钢研德凯科技有限公司 | High-strength and high-temperature-resistant magnesium alloy |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113755734A (en) * | 2021-08-30 | 2021-12-07 | 西安交通大学 | High-strength high-plasticity heat-resistant magnesium alloy with LPSO phase and SFs structure and preparation method thereof |
| CN113913659A (en) * | 2021-10-09 | 2022-01-11 | 哈尔滨工程大学 | High-temperature high-strength magnesium alloy by regulating and controlling proportion of composite rare earth and Zn and preparation method thereof |
| CN115386747A (en) * | 2022-08-02 | 2022-11-25 | 山西银光华盛镁业股份有限公司 | Method for preparing ZM5 and ZM6 magnesium alloy |
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Denomination of invention: Mg-Y-Er alloy with high strength, toughness and heat resistance suitable for gravity casting and its preparation method Effective date of registration: 20230109 Granted publication date: 20210720 Pledgee: Anhui Fengyang Rural Commercial Bank Co.,Ltd. Pledgor: FENGYANG L-S LIGHT ALLOY NET FORMING Co.,Ltd. Registration number: Y2023980030740 |