CN109881062A - A kind of high tough high-modulus extrusion casint magnesium alloy and preparation method thereof - Google Patents
A kind of high tough high-modulus extrusion casint magnesium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high tough high-modulus extrusion casint magnesium alloys and preparation method thereof, it is made of following element by mass percentage: the Al of a%, the mixing of one or more of La, Ce, Pr of b%, the Mn of c%, one or more of total RE rare earth Gd containing d%, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb element, one or more of total Si, Ge, Ca, Li, Sn, Zn, Sb containing e% element, impurity of the total amount less than 0.2%, surplus Mg；Wherein, a, b, c, d and e meet 3.5≤a≤6.5,3.5≤b≤4.5,0.01≤c≤1.5,0.01≤d≤3.0 and 0 < e≤5.0.Raw material is preheated, melts or casts, and extrusion casint obtains Mg alloy castings after remelting, and method is simple, technology stability is good and degree of controllability is high.
Description
Technical field
The invention belongs to nonferrous materials and its manufacture fields, and in particular to a kind of high tough high-modulus extrusion casint magnesium
Alloy and preparation method thereof.
Background technique
Magnesium and its alloy be industrial applicable most light-weight metal structural material at present, with small (the about aluminium of density
2/3, the 1/4 of steel), specific strength and the advantages that specific stiffness height, damping and amortization, machinability, good casting property, is widely used to
The fields such as automobile, communication electronics, aerospace, military affairs.In recent years, with aerospace and the rapid hair of transport facility
Exhibition, operates that required aerodynamic power is increasing, therefore obdurability to material members and elastoresistance adaptability to changes propose more
High requirement.But the lower absolute intensity of magnesium alloy, plasticity and elasticity modulus constrain its further pushing away in these fields
Extensively with application so that the demand of high tough high-modulus magnesium alloy is higher and higher.
AE44 (Mg-4Al-4RE, wt.%) magnesium alloy is that both had excellent room temperature mechanical property so far in commercial magnesium alloy
Can, and have both a kind of alloy of good high-temperature creep resistance.Its excellent mechanical property has benefited from Al element and RE element is raw
At Al11RE3Hardening constituent, but due to most of Al11RE3Hardening constituent be it is needle-shaped, can the second phase tip generate stress concentrate, dislike
Change material property.In response to this problem, Chinese patent CN108588524A is gone bad needle-shaped by elements such as alloying Gd, Y, Sm
Al11RE3It is mutually corynebacterium or graininess, and introduces Al2RE hardening constituent significantly improves the obdurability of alloy.For promotion magnesium
Alloy modulus, according to mixing rule it is found that introducing high-modulus reinforcement can be improved matrix modulus.Chinese patent
CN105624502A and CN104087800A is disclosed respectively by addition aluminium oxide and SiC particulate, to obtain high-modulus magnesium-based
The preparation method of composite material.But it is easy the presence of the bad problem that matches with basal body interface by additional high-modulus reinforcement, and often
Rule casting is difficult to ensure that reinforcement is uniformly distributed in the base.And it can by addition alloying element in-situ preparation high-modulus reinforced phase
Preferably to solve the above problems, Chinese patent CN104928549A and CN104928550A are just used and are added in the magnesium alloy
The elements such as Al, Li, Si form Al3Li、Mg2The high-modulus such as Si reinforced phase is to improve magnesium alloy modulus.
Though it is generated in-situ to pass through alloying currently, magnesium alloy modulus can be effectively improved by introducing high-modulus reinforced phase
High-modulus reinforced phase such as Al3Li、Mg2Si、Al2Ca etc. belongs to brittlement phase, and crack initiation point can be become by being distributed in crystal boundary, reduces
Magnesium alloy obdurability, especially plasticity.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of high tough high-modulus extrusion casint magnesium alloy
And preparation method thereof.By Reasonable Regulation And Control component ratio, controls reinforced phase and form and ratio is precipitated, so that the alloy is in room temperature item
High-strength tenacity and high elastic modulus are provided simultaneously under part.Alloy provided by the invention can satisfy the lightweight material of high tough high-modulus
Material and (or) the demand of components manufacture.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of high tough high-modulus extrusion casint magnesium alloy, is made of: a%'s following element by mass percentage
The mixing of one or more of La, Ce, Pr of Al, b%, the Mn of c%, add up to the RE rare earth Gd containing d%, Y, Sm,
One or more of Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb element add up in Si, Ge, Ca, Li, Sn, Zn, Sb containing e%
One or more of elements, impurity of the total amount less than 0.2%, surplus Mg, a, b, c, d and e meet following formulas (1)~(5),
(1)3.5≤a≤6.5；
(2)3.5≤b≤4.5；
(3)0.01≤c≤1.5；
(4)0.01≤d≤3.0；
(5)0<e≤5.0。
Preferably, in the formula (3) c value range are as follows: 0.2≤c≤1.5.Mn element additive amount >=0.2 can significantly mention
Corrosion resistance, enhancing aging response effect and raising elasticity modulus of high magnesium alloy etc., but additive amount > 1.5, can generate coarse
Al-Mn-RE phase, deteriorate material property.
Preferably, in the formula (4) d value range are as follows: 0.1≤d≤3.0.The rare earth elements such as Gd, Y, Sm consolidating in Mg
Solubility is larger, the additive amount of d >=0.1 ageing strengthening, rotten Al in formula (4)11RE3Second phase effect more preferably, but additive amount > 3.0
Matrix is isolated in the roughening that will cause the second phase during military service, and as crack initiation point severe exacerbation material mechanical performance.
Preferably, in the formula (5) e value range are as follows: 0.2≤e≤4.0.The elements such as Si, Ge, Ca, Li, Sn are in Mg
Solid solubility is smaller, in magnesium-rare earth containing Al, mainly forms reinforced phase reinforced alloys performance with other alloying elements.Formula (5)
The effect that alloy modulus is improved in the additive amount of middle e >=0.1 is more significant, but additive amount > 4.0 reinforced phases can excessively be roughened, so that
Alloy obdurability drastically reduces.
The independent role of alloying element
Wherein, 1) Al is used for balanced alloy strength, plasticity, improves Production Practice of Casting Technologies, makes the suitable big batch of the present invention
Production.2) for La, Ce, Pr element for improving alloy mechanical property, La, Ce, Pr element and aluminium are preferentially produced Al11RE3Phase inhibits
Generate the Mg of thermostability difference17Al12Phase improves the room temperature and mechanical behavior under high temperature of alloy；In addition, La, Ce, Pr can remove it is molten
Impurity when refining in magnesium alloy fused mass achievees the effect that refinery by de-gassing, purification melt.3) Mn is used to improve the corrosion resistance of alloy
Can, Mn can form compound with iron in magnesium alloy or other heavy metal elements, remove it mostly as slag；Mn can also promote
Into the ageing strengthening effect of alloy, Al-Mn nanometers of timeliness phases are formed, alloy obdurability and modulus are further increased；In addition, 720
At DEG C, solid solubility of the Mn in Mg is~1.1at.%, and under Extrution casting technique, part Mn element has little time to be precipitated and be formed
Saturated solid solution reduces matrix lattice constant, improves alloy elastic modulus.4) rare earth elements such as Gd, Y, Sm solid solubility in Mg
Larger, mainly exist in the form of three kinds in magnesium alloy containing Al: solid solution is in the base；Segregation is in crystal boundary, phase boundary and dendrite circle；Gu
It is dissolved in compound or is formed compound.Above-mentioned rare earth element is added into alloy, can play solution strengthening, improves the work of intensity
With.The content of above-mentioned rare earth is further increased, fine particle shape high-melting-point Al can be preferentially produced with Al element2RE intermetallic
Object can refine crystal grain as heterogeneous forming core core, and Dispersed precipitate changes crack initiation position during alloy fracture in matrix
Approach is set and extended, the plasticity of alloy is further increased.In addition, the addition of the rare earth elements such as Gd, Y, Sm can also promote to contain Al
The ageing strengthening effect of magnesium alloy further increases the intensity and modulus of alloy.5) elements such as Si, Ge, Ca, Li, Sn are in Mg
Solid solubility is lower, mainly generates reinforced phase with Mg or Al in magnesium alloy containing Al.As shown in table 1, the above element and Mg or Al are excellent
The reinforced phase elasticity modulus range first generated is 80~120GPa.According to mixing rule it is found that the enhancing being distributed in alloy substrate
Phase modulus is higher, and volume ratio is bigger, and the modulus of alloy is higher.And the test modulus value of Mg is 39~46GPa, therefore institute in table 1
The reinforced phase shown can effectively improve the elasticity modulus of magnesium alloy.
Table 1: the elasticity modulus of reinforced phase
The synergistic effect of alloying element
High tough high-modulus magnesium alloy, can further regulate and control the addition element type and content of different component in the present invention,
Crystal grain, rotten second phase can be further refined, alloy obdurability and elasticity modulus are improved.1) rare earth elements such as Gd, Y, Sm exist
Solute distribution coefficient k < 1 in Mg, and Rare-Earth Element Chemistry activity is extremely strong segregation and can be adsorbed on the crystal grain boundary or branch grown up
On crystal boundary face, crystal grain and dendrite are hindered, can significantly refine crystal grain, granulating Al11RE3Needlelike phase greatly improves alloy properties
Energy, especially plasticity.2) rare earth elements such as Gd, Y, Sm can go bad Chinese character shape Mg2Si and Al in net distribution2Ca is particle
Shape reduces isolate effect of the high-modulus reinforced phase to matrix, while capable of improving alloy modulus, does not drop low-alloyed obdurability.
Preferably, in the magnesium alloy materials, 3.6%≤b+d≤7.0%.It is further preferred that the magnesium alloy materials
In, 4.5%≤b+d≤6.0%.
The preparation method of the above-mentioned tough high-modulus extrusion casint magnesium alloy of height, includes the following steps,
S1: molten alloy, by pure Mg, pure Al, magnesium rare earth intermediate alloy, aluminium manganese or magnesium manganese intermediate alloy and remaining group
Divide and preheats respectively；
Preferably, in the step S1, preheating temperature is 200~250 DEG C, and preheating time is 2~6 hours.The preheating
Temperature and time can effectively remove the moisture of raw material, and be avoided that raw material surface excessive oxidation in warm is asked
Topic.
Preferably, in the step S1, magnesium rare earth intermediate alloy is magnesium cerium-rich mischmetal intermediate alloy, the centre conjunction of magnesium lanthanum
Gold, magnesium cerium intermediate alloy, magnesium praseodymium intermediate alloy, magnesium samarium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium richness yttrium are mixed
Close rare earth intermediate alloy, magnesium neodymium intermediate alloy, magnesium praseodymium neodymium mixed rare-earth intermediate alloy, magnesium erbium intermediate alloy, magnesium europium intermediate alloy,
One of magnesium holmium intermediate alloy, magnesium thulium intermediate alloy, magnesium lutetium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy are several
The combination of kind intermediate alloy.
Contain tri- kinds of rare earth elements of La, Ce, Pr in the cerium-rich mischmetal.
Preferably, in the step S1, remaining group is divided into Mg-based master alloy or contained aluminium-base intermediate alloy or pure metal.It is described
Mg-based master alloy is magnesium silicon intermediate alloy, magnesium calcium intermediate alloy, magnesium lithium intermediate alloy, magnesium zinc intermediate alloy, the centre conjunction of magnesium antimony
The combination of one or more of gold intermediate alloy；The contained aluminium-base intermediate alloy is aluminium silicon intermediate alloy, aluminium germanium intermediate alloy, aluminium
The group of one or more of calcium intermediate alloy, aluminium lithium intermediate alloy, aluminium tin intermediate alloy, aluminium antimony intermediate alloy intermediate alloy
It closes；The pure metal is one or both of pure silicon, pure zinc.
S2: the pure Mg after preheating is completely melt in protective atmosphere；It is pure after preheating is added at 670~690 DEG C
Al；When temperature is raised to 720~740 DEG C, the intermediate alloy or pure metal after preheating is added；It is completely molten to intermediate alloy or pure metal
It is warming up to 720~740 DEG C after change, refining agent is added and is refined, is stood after refining at 710-730 DEG C, it is cooled to 680~
Skimming operation after 700 DEG C obtains magnesium alloy fused mass, or casting obtains magnesium alloy ingot；
Preferably, in step S2, refining agent is added and is refined, at 720 DEG C after refining, is stood.Refining temperature choosing
Select 720 DEG C, refining effect is best, can degasification to the full extent slagging-off, purify melt.
The protective atmosphere of the step S2 is SF6And CO2Mixed gas.Preferably, the SF6And CO2Volume ratio be
1:99.
The refining agent of the step S2 is the refining agent of Mg alloy containing inorganic salts, it is preferred that sodium salt, sylvite, villiaumite
Inorganic salts refining agent of Mg alloy or carbon trichloride.
Preferably, the additional amount of refining agent is the 1-5% of all total mass of raw materiales.
S3: in step S2 magnesium alloy fused mass or magnesium alloy ingot remelting after carry out extrusion casint, obtain magnesium alloy casting
Part.
Preferably, in the step S3, melt cast temperature be 680 DEG C~700 DEG C, metal die temperature be 220 DEG C~
300 DEG C, squeeze pressure be 50MPa~120MPa, the dwell time 1~60 second.The melt cast temperature and metal die temperature
Melt is set to have good mobility, feeding during extrusion casint；The squeeze pressure and dwell time can be in melts
Compact tissue in process of setting is finally perfected, the few extrusion casint part of defect.
The tough high-modulus extrusion casint magnesium alloy of height produced by the invention can be used directly, or casting is carried out at solid solution
Reason, artificial aging processing；
Preferably, the temperature of the solution treatment is 300 DEG C~500 DEG C, and the time of the solution treatment is 0.1~4 small
When；The temperature of the artificial aging processing is 175 DEG C~225 DEG C, and the time of the ageing treatment is 1~32 hour.It is described solid
Molten treatment process can to the full extent dissolve in the second phase in magnesium matrix；It is significant that the aging treatment process can be such that casting obtains
Ageing strengthening effect.
Or the Mg alloy castings prepared in step S3 are subjected to direct labor's ageing treatment, the temperature of the ageing treatment
It is 175~225 DEG C, the time of the ageing treatment is 1~32 hour.
Preferably, the Cooling Method After Heat-treatment is air-cooled or water cooling.
Compared with prior art, the beneficial effects of the present invention are:
1, magnesium alloy materials prepared by the present invention compared with prior art, can guarantee preferably again while improving elasticity modulus
Obdurability.The present invention introduces Mg using alloyage process in situ2Si、Al2Ca or Al3Li et al. high-modulus hardening constituent, significantly improves
Alloy elastic modulus.
2, the RE such as Gd, Y, Nd element is in addition to that can refine matrix, and go bad Al11RE3Needlelike phase introduces Al2RE hardening constituent, mentions
The obdurability of high alloy, the Chinese character shape that can also go bad Mg2Si, netted Al2Ca reinforced phase, improve alloy elastic modulus while again
Preferable obdurability can be had both.
3, this preparation method is simple, technology stability is good, technique degree of controllability is high.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
Various intermediate alloys used in the present invention are commercial product, and the magnesium rare earth intermediate alloy is purchased from Ganzhou and soars
Light-alloy Co., Ltd.
Embodiment 1:
The alloying component (mass percent) of extrusion casint magnesium alloy: 3.50%Al, 1.72%Ce, 0.87%La,
0.91%Pr, 1.19%Sm, 1.76%Gd, 0.01%Dy, 0.04%Er, 0.01%Lu, 0.5%Si, 0.01%Mn, it is other not
For evitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and magnesium manganese intermediate alloy: pure after preheating is added after temperature reaches 670 DEG C when pure magnesium is completely melt
Aluminium, magnesium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 720 DEG C, the magnesium cerium-rich mischmetal intermediate alloy, magnesium samarium after preheating is added
Intermediate alloy, magnesium gadolinium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium erbium intermediate alloy, magnesium lutetium intermediate alloy, magnesium silicon intermediate alloy.
(5) refining agent is added after intermediate alloy is completely melt, when melt temperature gos up to 720 DEG C to be refined, refines
It is stood afterwards at 720 DEG C, skimming operation after being cooled to 680 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 680 DEG C, obtains Mg alloy castings, metal die temperature is
300 DEG C, squeeze pressure 60MPa, the dwell time is 55 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 1 is as shown in table 2.
Embodiment 2:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 5.67%Al, 2.20%Ce,
1.13%La, 1.17%Pr, 0.01%Sm, 5.00%Si, 0.41%Mn, other inevitable impurity less than 0.2%, remaining
For Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 2 hours at 250 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and magnesium manganese intermediate alloy: pure after preheating is added after temperature reaches 680 DEG C when pure magnesium is completely melt
Aluminium, magnesium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 730 DEG C, the magnesium cerium-rich mischmetal intermediate alloy, magnesium samarium after preheating is added
Intermediate alloy, aluminium silicon intermediate alloy；
(5) refining agent is added after intermediate alloy is completely melt, when melt temperature gos up to 730 DEG C to be refined, refines
It is stood afterwards at 720 DEG C, skimming operation after being cooled to 690 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 690 DEG C, obtains Mg alloy castings, metal die temperature is
250 DEG C, squeeze pressure 50MPa, the dwell time is 60 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 2 is as shown in table 2.
Embodiment 3:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 4.69%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 1.00%Si, 0.34%Mn, it is other inevitable
For impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 6 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and magnesium manganese intermediate alloy: pure after preheating is added after temperature reaches 690 DEG C when pure magnesium is completely melt
Aluminium, magnesium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 740 DEG C, the magnesium mixed rare earth of lanthanum and cerium intermediate alloy, magnesium samarium after preheating is added
Intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy and magnesium silicon intermediate alloy；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 740 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 700 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 700 DEG C, obtains Mg alloy castings, metal die temperature is
220 DEG C, squeeze pressure 120MPa, the dwell time is 1 second.
The room-temperature mechanical property test result of the embodiment of the present invention 3 is as shown in table 2.
Embodiment 4:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 5.11%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.03%Eu, 1.00%Si, 1.00%Zn, 0.34%
Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium, pure zinc and aluminium manganese intermediate alloy: when pure magnesium is completely melt, after temperature reaches 670 DEG C, preheating is added
Fine aluminium, pure zinc, aluminium manganese intermediate alloy afterwards；
(4) plus intermediate alloy: when temperature is raised to 720 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium europium intermediate alloy, magnesium silicon centre are closed
Gold；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 720 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 680 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 680 DEG C, obtains Mg alloy castings, metal die temperature is
300 DEG C, squeeze pressure 70MPa, the dwell time is 30 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 4 is as shown in table 2.
Embodiment 5:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 5.50%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 2.00%Si, 1.00%Zn, 0.34%Mn, it is other not
For evitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium, pure zinc and magnesium manganese intermediate alloy: when pure magnesium is completely melt, after temperature reaches 690 DEG C, preheating is added
Fine aluminium, pure zinc, magnesium manganese intermediate alloy afterwards；
(4) plus intermediate alloy: when temperature is raised to 740 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium silicon intermediate alloy；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 740 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 700 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 700 DEG C, obtains Mg alloy castings, metal die temperature is
220 DEG C, squeeze pressure 120MPa, the dwell time is 1 second.
The room-temperature mechanical property test result of the embodiment of the present invention 5 is as shown in table 2.
Embodiment 6:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 6.50%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 2.00%Si, 2.00%Zn, 0.34%Mn, it is other not
For evitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium, pure zinc and aluminium manganese intermediate alloy: when pure magnesium is completely melt, after temperature reaches 680 DEG C, preheating is added
Fine aluminium, pure zinc, aluminium manganese intermediate alloy afterwards；
(4) plus intermediate alloy: when temperature is raised to 730 DEG C, be added preheated magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium silicon intermediate alloy；
(5) refining agent is added after intermediate alloy is completely melt, when melt temperature gos up to 730 DEG C to be refined, refines
It is stood afterwards at 720 DEG C, skimming operation after being cooled to 690 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass carries out extrusion casint at 690 DEG C, obtains Mg alloy castings, and metal die temperature is 250
DEG C, squeeze pressure 120MPa, the dwell time is 1 second.
The room-temperature mechanical property test result of the embodiment of the present invention 6 is as shown in table 2.
Embodiment 7:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 5.30%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.03%Tb, 1.00%Ge, 1.00%Zn, 1.50%
Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium, pure zinc and aluminium manganese intermediate alloy: when pure magnesium is completely melt, after temperature reaches 670 DEG C, preheating is added
Fine aluminium, pure zinc, aluminium manganese intermediate alloy afterwards；
(4) plus intermediate alloy: when temperature is raised to 720 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium terbium intermediate alloy, magnesium germanium centre are closed
Gold；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 720 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 680 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 680 DEG C, obtains Mg alloy castings, metal die temperature is
300 DEG C, squeeze pressure 100MPa, the dwell time is 20 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 7 is as shown in table 2.
Embodiment 8:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 6.00%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.02%Ho, 0.70%Li, 0.34%Mn, it is other not
For evitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and aluminium manganese intermediate alloy: pure after preheating is added after temperature reaches 690 DEG C when pure magnesium is completely melt
Aluminium, aluminium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 740 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium holmium intermediate alloy, magnesium lithium centre are closed
Gold；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 740 DEG C to be refined, essence
It is stood after refining at 720 DEG C, skimming operation after being cooled to 700 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 700 DEG C, obtains Mg alloy castings, metal die temperature is
220 DEG C, squeeze pressure 110MPa, the dwell time is 10 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 8 is as shown in table 2.
Embodiment 9:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 6.00%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.70%Li, 0.50%Si, 0.50%Zn, 0.34%
Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium, pure zinc and aluminium manganese intermediate alloy: when pure magnesium is completely melt, after temperature reaches 680 DEG C, preheating is added
Fine aluminium, pure zinc, aluminium manganese intermediate alloy afterwards；
(4) plus intermediate alloy: when temperature is raised to 730 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium lithium intermediate alloy, aluminium silicon centre are closed
Gold；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 730 DEG C to be refined, after refining
720 DEG C are stood, skimming operation after being cooled to 690 DEG C, obtain magnesium alloy fused mass, and casting obtains magnesium alloy ingot；
Extrusion casint process are as follows:
After the magnesium alloy ingot remelting, extrusion casint is carried out at 700 DEG C, obtains Mg alloy castings, metal die
Temperature is 250 DEG C, squeeze pressure 90MPa, and the dwell time is 30 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 9 is as shown in table 2.
Embodiment 10:
The alloying component (mass percent) of extrusion casint magnesium alloy: 5.00%Al, 1.92%Ce, 2.07%La,
0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.20%Ca, 0.34%Mn, other inevitable impurity are less than
0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and magnesium manganese intermediate alloy: pure after preheating is added after temperature reaches 690 DEG C when pure magnesium is completely melt
Aluminium, magnesium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 740 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium calcium intermediate alloy；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 740 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 700 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 700 DEG C, obtains Mg alloy castings, metal die temperature is
220 DEG C, squeeze pressure 120MPa, the dwell time is 1 second.
The room-temperature mechanical property test result of the embodiment of the present invention 10 is as shown in table 2.
Embodiment 11:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 5.00%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.01%Tm, 0.50%Ca, 0.34%Mn, it is other not
For evitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and aluminium manganese intermediate alloy: pure after preheating is added after temperature reaches 680 DEG C when pure magnesium is completely melt
Aluminium, aluminium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 730 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium thulium intermediate alloy, magnesium calcium centre are closed
Gold；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 730 DEG C to be refined, after refining
720 DEG C are stood, skimming operation after being cooled to 690 DEG C, obtain magnesium alloy fused mass, and casting obtains magnesium alloy ingot；
Extrusion casint process are as follows:
After the magnesium alloy ingot remelting, extrusion casint is carried out at 680 DEG C, obtains Mg alloy castings, metal die
Temperature is 250 DEG C, squeeze pressure 115MPa, and the dwell time is 10 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 11 is as shown in table 2.
Embodiment 12:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 5.00%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.50%Ca, 0.20%Sb, 0.34%Mn, it is other not
For evitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and aluminium manganese intermediate alloy: pure after preheating is added after temperature reaches 670 DEG C when pure magnesium is completely melt
Aluminium, aluminium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 720 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, aluminium calcium intermediate alloy, aluminium antimony centre are closed
Gold；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 720 DEG C to be refined, essence
It is stood after refining at 720 DEG C, skimming operation after being cooled to 680 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 680 DEG C, obtains Mg alloy castings, metal die temperature is
200 DEG C, squeeze pressure 120MPa, the dwell time is 1 second.
The room-temperature mechanical property test result of the embodiment of the present invention 12 is as shown in table 2.
Embodiment 13:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 4.50%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 1.00%Sn, 0.73%Mn, it is other inevitable
For impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and aluminium manganese intermediate alloy: pure after preheating is added after temperature reaches 670 DEG C when pure magnesium is completely melt
Aluminium, aluminium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 720 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, aluminium tin intermediate alloy；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 720 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 680 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
By the magnesium alloy fused mass, extrusion casint is carried out at 680 DEG C, obtains Mg alloy castings, and metal die temperature is
300 DEG C, squeeze pressure 100MPa, the dwell time is 10 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 13 is as shown in table 2.
Embodiment 14:
The alloying component (mass percent) of high tough high-modulus extrusion casint magnesium alloy: 4.50%Al, 1.92%Ce,
2.07%La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 2.00%Sn, 1.20%Mn, it is other inevitable
For impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and aluminium manganese intermediate alloy: pure after preheating is added after temperature reaches 670 DEG C when pure magnesium is completely melt
Aluminium, aluminium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 720 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, aluminium tin intermediate alloy；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 720 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 680 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
By the magnesium alloy fused mass, extrusion casint is carried out at 680 DEG C, obtains Mg alloy castings, and metal die temperature is
300 DEG C, squeeze pressure 75MPa, the dwell time is 40 seconds.
The room-temperature mechanical property test result of the embodiment of the present invention 14 is as shown in table 2.
Comparative example 1
The alloying component (mass percent) of 1 extrusion casint magnesium alloy of comparative example: 6.00%Al, 1.92%Ce, 2.07%
La, 0.16%Sm, 0.11%Nd, 0.40%Gd, 0.31%Y, 0.34%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the Alloy by Squeeze Casting method in the method for smelting and the present invention of conventional rare magnesium alloy:
Wherein, melting process is in SF6And CO2It is carried out under the conditions of mixed gas protected, steps are as follows:
(1) baking material: melting raw material is preheated 3 hours at 200 DEG C；
(2) it melts magnesium: the pure magnesium after drying has been put into SF6/CO2It is melted in the crucible electrical resistance furnace of gas shield；
(3) add fine aluminium and aluminium manganese intermediate alloy: pure after preheating is added after temperature reaches 680 DEG C when pure magnesium is completely melt
Aluminium, aluminium manganese intermediate alloy；
(4) plus intermediate alloy: when temperature is raised to 730 DEG C, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy after preheating is added,
Magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy,；
(5) refining agent is added after intermediate alloy fusing, when melt temperature gos up to 730 DEG C to be refined, after refining
720 DEG C are stood, and skimming operation after being cooled to 690 DEG C obtains magnesium alloy fused mass；
Extrusion casint process are as follows:
The magnesium alloy fused mass is subjected to extrusion casint at 690 DEG C, obtains Mg alloy castings, metal die temperature is
200 DEG C, squeeze pressure 120MPa, the dwell time is 1 second.
The room-temperature mechanical property test result of comparative example 1 of the present invention is as shown in table 2.
Table 2 is the tough high-modulus extrusion casint magnesium alloy of height that 1~embodiment of the embodiment of the present invention 14 and comparative example 1 obtain
Room-temperature mechanical property test result.
Table 2
As shown in Table 2, the tough high-modulus extrusion casint magnesium alloy of height that the embodiment of the present invention obtains has excellent room temperature
Mechanical property significantly improves the elasticity modulus of magnesium alloy while guaranteeing obdurability.
Embodiment 15
The tough high-modulus extrusion casint magnesium alloy of height that the embodiment of the present invention 12 obtains is carried out 32 hours at 175 DEG C
Ageing treatment, the type of cooling of the ageing treatment are air-cooled.
The room-temperature mechanical property test result of the embodiment of the present invention 15 is as shown in table 3.
Embodiment 16
The tough high-modulus extrusion casint magnesium alloy of height that the embodiment of the present invention 12 obtains is carried out 16 hours at 200 DEG C
Ageing treatment, the type of cooling of the ageing treatment are water cooling.
The room-temperature mechanical property test result of the embodiment of the present invention 16 is as shown in table 3.
Embodiment 17
The tough high-modulus extrusion casint magnesium alloy of height that the embodiment of the present invention 12 obtains is carried out 1 hour at 225 DEG C
Ageing treatment, the type of cooling of the ageing treatment are water cooling.
The room-temperature mechanical property test result of the embodiment of the present invention 17 is as shown in table 3.
Embodiment 18
The tough high-modulus extrusion casint magnesium alloy of height that the embodiment of the present invention 12 obtains is carried out 4 hours at 300 DEG C
Solution treatment and 32 hours ageing treatments are carried out at 175 DEG C, the type of cooling of the solid solution and ageing treatment is water cooling.
The room-temperature mechanical property test result of the embodiment of the present invention 18 is as shown in table 3.
Embodiment 19
The tough high-modulus extrusion casint magnesium alloy of height that the embodiment of the present invention 12 obtains is carried out 2 hours at 400 DEG C
Solution treatment and 16 hours ageing treatments are carried out at 200 DEG C, the type of cooling of the ageing treatment is water cooling.
The room-temperature mechanical property test result of the embodiment of the present invention 19 is as shown in table 3.
Embodiment 20
The tough high-modulus extrusion casint magnesium alloy of height that the embodiment of the present invention 12 obtains is carried out 0.1 hour at 500 DEG C
Solution treatment and 1 hour ageing treatment is carried out at 225 DEG C, the type of cooling of the solid solution and ageing treatment is water
It is cold.
The room-temperature mechanical property test result of the embodiment of the present invention 20 is as shown in table 3.
Table 3 is that the tough high-modulus extrusion casint magnesium alloy room-temperature mechanical property of height that 15~embodiment of embodiment 20 obtains is surveyed
Test result.
Table 3
| Tensile strength/MPa | Elongation percentage/% | Modulus/GPa | |
| Embodiment 15 | 302 | 11.4 | 62.2 |
| Embodiment 16 | 312 | 10.8 | 62.8 |
| Embodiment 17 | 308 | 12.6 | 61.1 |
| Embodiment 18 | 319 | 11.5 | 64.3 |
| Embodiment 19 | 329 | 12.1 | 66.4 |
| Embodiment 20 | 318 | 12.3 | 61.9 |
As shown in Table 3, heat treatment process provided by the invention can be further improved the obdurability and springform of magnesium alloy
Amount.The obdurability and elasticity modulus for the heat treatment process raising alloy that wherein embodiment 19 provides are the most significant.
Claims (9)
1. a kind of high tough high-modulus extrusion casint magnesium alloy, which is characterized in that by following element group by mass percentage
At: the Al of a%, the mixing of one or more of La, Ce, Pr of b%, the Mn of c% add up to the RE rare earth element containing d%
One or more of Gd, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb element, add up to Si, Ge containing e%, Ca, Li,
One or more of Sn, Zn, Sb element, impurity of the total amount less than 0.2%, surplus Mg；Wherein, under a, b, c, d and e meet
Formula (1)~(5) are stated,
(1)3.5≤a≤6.5；
(2)3.5≤b≤4.5；
(3)0.01≤c≤1.5；
(4)0.01≤d≤3.0；
(5)0<e≤5.0。
2. the tough high-modulus extrusion casint magnesium alloy of height according to claim 1, which is characterized in that
The value range of c in the formula (3) are as follows: 0.2≤c≤1.5, and/or
The value range of d in the formula (4) are as follows: 0.1≤d≤3.0 and/or
The value range of e in the formula (5) are as follows: 0.2≤e≤4.0.
3. the tough high-modulus extrusion casint magnesium alloy of height according to claim 1 characterized by comprising
The Mg that (I) is gone bad by RE element2Si、Al2Ca、Mg2Ge、Al3Li and Mg2Sn high-modulus hardening constituent, and
(II) corynebacterium Al11RE3, graininess Al2RE hardening constituent, and/or
(III) Al-Mn nanometers of ageing strengthening phases.
4. the tough high-modulus extrusion casint magnesium alloy of height according to claim 1, which is characterized in that the magnesium alloy materials
In, 3.6%≤b+d≤7.0%.
5. the tough high-modulus extrusion casint magnesium alloy of height according to claim 4, which is characterized in that the magnesium alloy materials
In, 4.5%≤b+d≤6.0%.
6. the preparation method of any one of Claims 1 to 5 height is tough high-modulus extrusion casint magnesium alloy, which is characterized in that
Include the following steps:
S1: molten alloy, by pure Mg, pure Al, magnesium rare earth intermediate alloy, aluminium manganese or magnesium manganese intermediate alloy and remaining component point
It does not preheat；Wherein, preheating temperature is 200~250 DEG C, and preheating time is 2~6 hours；
S2: the pure Mg after preheating is completely melt in protective atmosphere；Pure Al after preheating is added at 670~690 DEG C；When
Temperature is raised to 720~740 DEG C, the intermediate alloy or pure metal after preheating is added；After intermediate alloy or pure metal are completely melt
720~740 DEG C are warming up to, refining agent is added and is refined, is stood after refining at 710-730 DEG C, is cooled to 680~700
Skimming operation after DEG C obtains magnesium alloy fused mass, or casting obtains magnesium alloy ingot；
S3: in step S2 magnesium alloy fused mass or magnesium alloy ingot remelting after carry out extrusion casint, melt cast temperature is 680
DEG C~700 DEG C, metal die temperature be 220 DEG C~300 DEG C, squeeze pressure be 50MPa~120MPa, the dwell time 1~60 second,
Obtain Mg alloy castings.
7. the preparation method of high tough high-modulus extrusion casint magnesium alloy according to claim 6, which is characterized in that step S1
In:
The magnesium rare earth intermediate alloy is magnesium cerium-rich mischmetal intermediate alloy, magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium praseodymium
Intermediate alloy, magnesium samarium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium richness yttrium mixed rare earth intermediate alloy, in magnesium neodymium
Between alloy, magnesium praseodymium neodymium mixed rare-earth intermediate alloy, magnesium erbium intermediate alloy, magnesium europium intermediate alloy, magnesium holmium intermediate alloy, among magnesium thulium
The combination of one or more of alloy, magnesium lutetium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy intermediate alloy；Wherein:
Contain tri- kinds of rare earth elements of La, Ce, Pr in the cerium-rich mischmetal；
Remaining described group is divided into Mg-based master alloy or contained aluminium-base intermediate alloy or pure metal；Wherein:
The Mg-based master alloy is magnesium silicon intermediate alloy, magnesium calcium intermediate alloy, magnesium lithium intermediate alloy, magnesium zinc intermediate alloy, magnesium
The combination of one or more of antimony intermediate alloy intermediate alloy；
The contained aluminium-base intermediate alloy is aluminium silicon intermediate alloy, aluminium germanium intermediate alloy, aluminium calcium intermediate alloy, aluminium lithium intermediate alloy, aluminium
The combination of one or more of tin intermediate alloy, aluminium antimony intermediate alloy intermediate alloy；
The pure metal is one or both of pure silicon, pure zinc.
8. the preparation method of high tough high-modulus extrusion casint magnesium alloy according to claim 6, which is characterized in that step S2
In:
Refining agent is added to be refined, at 720 DEG C after refining, is stood；
The protective atmosphere is SF6And CO2Mixed gas, and SF6And CO2Volume ratio be 1:99；
The refining agent is the inorganic salts refining agent of Mg alloy or carbon trichloride of sodium salt, sylvite, villiaumite, and additional amount is all originals
Expect the 1-5% of gross mass.
9. the preparation method of high tough high-modulus extrusion casint magnesium alloy according to claim 6, which is characterized in that further include
When to Mg alloy castings obtained by step S3 carry out including solution treatment and artificial aging is handled hot intensive treatment or direct labor
Effect processing；Wherein:
The temperature of the solution treatment is 300~500 DEG C, and the time is 0.1~4 hour；
The temperature of the artificial aging processing is 175~225 DEG C, and the time is 1~32 hour.
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| CN113373358A (en) * | 2021-06-23 | 2021-09-10 | 西安四方超轻材料有限公司 | High-strength easily-deformed single-phase magnesium-lithium alloy material and preparation method thereof |
| CN115537620A (en) * | 2021-06-30 | 2022-12-30 | 比亚迪股份有限公司 | Die-casting magnesium alloy and preparation method and application thereof |
| CN115537620B (en) * | 2021-06-30 | 2024-02-27 | 比亚迪股份有限公司 | Die-casting magnesium alloy and preparation method and application thereof |
| CN113667872A (en) * | 2021-08-25 | 2021-11-19 | 哈尔滨工程大学 | Ho reinforced magnesium-lithium alloy and preparation method thereof |
| CN114318093A (en) * | 2021-12-08 | 2022-04-12 | 中国科学院金属研究所 | Low-cost high-strength high-modulus cast magnesium alloy and preparation method thereof |
| CN114574743A (en) * | 2022-03-02 | 2022-06-03 | 东北大学 | Medium-strength high-plasticity Mg-Ce-Sm series plate and pre-stretching strengthening method thereof |
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