CN108977711A - A kind of diecast magnesium alloy material and preparation method thereof - Google Patents
A kind of diecast magnesium alloy material and preparation method thereof Download PDFInfo
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- CN108977711A CN108977711A CN201810812693.2A CN201810812693A CN108977711A CN 108977711 A CN108977711 A CN 108977711A CN 201810812693 A CN201810812693 A CN 201810812693A CN 108977711 A CN108977711 A CN 108977711A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
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Abstract
The invention belongs to structural metallic materials fields, and in particular to a kind of diecast magnesium alloy material and preparation method thereof.The material 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, impurity of the total amount less than 0.2%, surplus is Mg, wherein a, b, c and d meet following 3.5≤a≤4.5；3.5≤b≤4.5；0.2≤c≤0.5；0.01≤d≤3.0.The material mechanical performance is excellent, casting character is good, has widened the application field of magnesium alloy materials.Stable preparation process provided by the invention is good, degree of controllability is high.
Description
Technical field
The invention belongs to structural metallic materials fields, and in particular to a kind of diecast magnesium alloy material and preparation method thereof.
Background technique
As the problems such as global energy shortage, environmental pollution becomes increasingly conspicuous, automotive energy-saving emission-reducing has become whole world reply money
The inevitable choice in source and environment significant challenge.The report of world car association points out that the fuel consumption of vehicle body self weight accounts for the total oil consumption of automobile
~70%, vehicle weight is every to reduce 10%, and fuel consumption can reduce by 6%~8%, and discharge reduces by 5%~6%, therefore car body
Lightweight has become the important trend of current car body materials.Magnesium and its alloy are current industrial applicable most light metals
Structural material, have density small (about the 2/3 of aluminium, the 1/4 of steel), specific strength and specific stiffness height, damping and amortization, machinability,
The advantages that good casting property, is widely used to the fields such as automobile, communication electronics, aerospace.But absolute intensity and plasticity compared with
It is low so that magnesium and its alloy are mainly used as non-bearing or the lesser component of load, constrain its and further promote and application.
AE44 (Mg-4Al-4RE, wt.%) magnesium alloy is that both had excellent room temperature mechanical property so far in commercial magnesium alloy
It can (die casting state, tensile strength sigmab> 240MPa, elongation percentage δ > 10.0%), and have both a kind of conjunction of good high-temperature creep resistance
Gold.Chinese patent CN101440450A discloses a kind of lanthanum-containing AE heat resisting die-casting magnesium alloy, and component content (wt.%) is
3.5%~4.5% Al, 1%~6% La, 0.2%~0.6% Mn, less than 0.03%, surplus is impurity element total amount
Magnesium.Chinese patent CN101158002B discloses a kind of AE system heat-proof compression casting magnesium alloy containing cerium, lanthanum, component content
It (wt.%) is 3%~5% Al, 0.4%~2.6% Ce, 0.4%~2.6% La, 0.2%~0.6% Mn, surplus
For magnesium.These patents are by improving Al11RE3Phase thermostability improves the high-temperature behavior of alloy, but its room-temperature property is difficult to meet
The application demand of magnesium alloy with high strength and ductility.Al in traditional AE system Magnesium Alloy11RE3Mutually be it is needle-shaped, it is needle-shaped during military service
Tip is easy to produce stress and concentrates simultaneously crack initiation, deteriorates material mechanical performance, and mainly with AE in the alloy in above-mentioned patent
It is alloy high-temp performance is starting point, but (1) to Al11RE3Needle-shaped phase morphology is without improvement；(2) drawing without novel Room Temperature hardening constituent
Enter；(3) only design casting, lacks subsequent heat treatment.Therefore how Al is corrected11RE3Needlelike phase, introduce novel reinforced phase and
Promote alloy can heat treatment be raising AE system magnesium alloy room temperature obdurability critical issue.It has been observed that samarium, gadolinium, yttrium etc. are dilute
Earth elements (1) and aluminium element form tiny high-melting-point Al in early solidification2RE phase can significantly refine base as heterogeneous forming core core
Body, and introduce parvo novel hardening constituent；(2) solute distribution coefficient k < 1 in magnesium is enriched in solid liquid interface in process of setting and hinders
Hinder growing up for matrix and the second phase, further can significantly refine matrix and granulates the second phase morphology；(3) solid solubility in magnesium
Greatly, has solid solution strengthening effect；(4) solid solubility varies with temperature reduction, has ageing strengthening effect.And at present by addition
The rare earth element for stating characteristic carries out tissue reshaping and modification to AE system magnesium alloy and to introduce novel reinforced phase tough to improve alloy
Property has no domestic and international report.
Summary of the invention
The object of the present invention is to provide diecast magnesium alloy material, the material mechanical performance is excellent, casting character is good, widens
The application fields of magnesium alloy materials.
It is a further object to provide diecast magnesium alloy material preparation method, technology stability is good.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of diecast magnesium alloy material, it is characterised in that: be 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%, add up to the RE rare earth Gd containing d%, Y, Sm, Nd,
One or more of Er, Eu, Ho, Tm, Lu, Dy, Yb element, impurity of the total amount less than 0.2%, surplus Mg, a, b, c and d
Meet following formulas (1)~(4),
(1)3.5≤a≤4.5；
(2)3.5≤b≤4.5；
(3)0.2≤c≤0.5；
(4)0.01≤d≤3.0。
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, and additive amount >=0.1 of d has significantly more ageing strengthening effect in formula (4), but additive amount > 3.0 will cause
Matrix is isolated in the roughening of two-phase during military service, and as crack initiation point severe exacerbation material mechanical performance.
Wherein, 1) aluminium 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) manganese is used to improve the corrosion resistance of alloy
Can, manganese can form compound with iron in magnesium alloy or other heavy metal elements, remove it mostly as slag；Furthermore manganese can
Promote the ageing strengthening effect of alloy, forms Al-Mn nanometers of timeliness phases, further increase alloy obdurability.4) Gd, Y, Sm etc. are dilute
Earth elements solid solubility in Mg is larger, mainly exists in the form of three kinds in AE system magnesium alloy: solid solution is in the base；Segregation is in crystalline substance
Boundary, phase boundary and dendrite circle；It is solid-solubilized in compound or is formed compound.Above-mentioned rare earth element is added into alloy, can be played solid
Molten reinforcing improves the effect of intensity.Solute distribution coefficient k < 1 of the above rare earth element in Mg, and Rare-Earth Element Chemistry activity
It is extremely strong, it segregation and can be adsorbed on the crystal grain boundary grown up or dendrite interface, hinder crystal grain and dendrite, can significantly refine crystalline substance
Grain, granulating Al11RE3Needlelike phase greatly improves alloy property, especially plasticity.Further increase the content of above-mentioned rare earth, meeting
Fine particle shape high-melting-point Al is preferentially produced with Al element2RE intermetallic compound can refine crystal grain as heterogeneous forming core core,
And Dispersed precipitate changes crack initiation position and extension approach during alloy fracture, further increases alloy in matrix
Plasticity.In addition, the addition of the rare earth elements such as Gd, Y, Sm can also promote the ageing strengthening effect of AE system magnesium alloy, further mention
The intensity of high alloy.
Preferably, in the magnesium alloy materials, 3.6%≤b+d≤7.5%.It is further preferred that the magnesium alloy materials
In, 4.5%≤b+d≤6.0%.The additional amount of b and d determines the properties of final magnesium alloy materials.
Preferably, in three kinds of elements of the b%, the combination of two kinds of elements of La, Ce is selected, material structure is more equal
Even, mechanical property is more preferably.
Preferably, the type of the RE element of the d% is Gd, Y, Sm, Nd element, and the mass ratio of Gd, Y, Sm, Nd are
40-81:31-52:16-30:11-24, suitable rare earth element type and proportion are conducive to refine crystal grain, and the granulating that goes bad is needle-shaped
Second phase Al11RE3, and the roughening of the second phase is avoided, the mechanical property of alloy can be greatly improved.
A kind of preparation method of diecast magnesium alloy material, includes the following steps,
S1: molten alloy preheats pure Mg, pure Al, magnesium rare earth intermediate alloy, aluminium manganese or magnesium manganese intermediate alloy 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 Ce, La, Pr in the cerium-rich mischmetal.
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, aluminium manganese or magnesium manganese intermediate alloy；When temperature is raised to 720~740 DEG C, the magnesium rare earth intermediate alloy after preheating is added；It is dilute to magnesium
Native intermediate alloy is warming up to 720~740 DEG C after being completely melt, refining agent is added and is refined, carries out after refining at 710-730 DEG C
It stands, skimming operation after being cooled to 680~700 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.
S3: in step S2 magnesium alloy fused mass or magnesium alloy ingot remelting after carry out evacuated die-casting process or antivacuum die casting,
Obtain Mg alloy castings.
Preferably, the process conditions of the evacuated die-casting process are, by magnesium alloy fused mass or magnesium alloy ingot remelting, 680~
Die casting is carried out at 700 DEG C, obtains Mg alloy castings, and the effective vacuum pressure of type chamber is 1~10kPa, and mold temperature is 200~300
DEG C, low speed speed is 0.2~0.4m/s, and high speed speed is 1.0~3.0m/s, and pressure charging press-shoot power is 20~50MPa；The vacuum
The casting of Die Casting, good compactness, inner void defect are few, can carry out effective heat treatment reinforcement.
Preferably, the process conditions of the antivacuum die casting are, by magnesium alloy fused mass or magnesium alloy ingot remelting, 680
It carrying out die casting at~700 DEG C, obtains Mg alloy castings, metal die temperature is 200~300 DEG C, low speed speed is 0.2~
0.4m/s, high speed speed are 1.0~3.0m/s, and pressure charging press-shoot power is 20~50MPa.The melt cast temperature and metal die
Temperature makes melt have good mobility, feeding in press casting procedure；The low speed speed and high speed speed energy maximum journey
Melt volume gas is reduced on degree, avoids the hole defect that cast-internal is excessive；The pressure charging press-shoot power can be in melt process of setting
Compact tissue is finally perfected, the few die casting of defect.
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.
The preparation method of diecast magnesium alloy material involved in the present invention further includes casting the magnesium alloy prepared in step S3
Part carries out solution treatment, artificial aging processing；
Preferably, the temperature of the solution treatment is 300~500 DEG C, and the time of the solution treatment is 0.1~4 hour；
The temperature of the artificial aging processing is 175~225 DEG C, and the time of the ageing treatment is 1~32 hour.The solution treatment
Technique can to the full extent dissolve in the second phase in magnesium matrix under the premise of avoiding casting from occurring being bubbled or deforming；When described
Effect treatment process can make casting obtain significant 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.
Compared with prior art, the beneficial effects of the present invention are:
1, compared with prior art, tissue is significantly refined magnesium alloy materials prepared by the present invention, and the second phase is by needle
Shape goes bad as graininess, and introduces cenotype Al2RE significantly improves alloy obdurability, at room temperature.
2, to the power for effectively increasing magnesium alloy materials after alloy implementation direct aging (T5) or solid solution+artificial aging (T6)
Learn performance.
3, this preparation method is simple, technology stability is good, technique degree of controllability is high.
Detailed description of the invention
Fig. 1 is 1 alloy center portion micro-organization chart of comparative example, and the second phase morphology is typical needlelike phase.
Fig. 2 is 1 alloy surface micro-organization chart of comparative example, and tissue is typical equiaxed dendrite.
Fig. 3 is 5 alloy center portion micro-organization chart of the embodiment of the present invention, and the second phase is fined, and is fine particle shape.
Fig. 4 is 5 alloy surface micro-organization chart of the embodiment of the present invention, and tissue is significantly refined, and is tiny isometric branch
Brilliant and columnar dendrite.
Fig. 5 is 5 alloy center portion tensile stress strain curve of the embodiment of the present invention.
Fig. 6 is 5 alloy surface tensile stress strain curve of the embodiment of the present invention.
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 diecast magnesium alloy: 3.82%Al, 2.11%Ce, 1.08%La, 0.98%Pr,
0.01%Sm, 0.32%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 720 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium samarium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 680 DEG C, obtains Mg alloy castings, metal die temperature is 300 DEG C,
Low speed speed is 0.2m/s, and high speed speed is 1.0m/s, and pressure charging press-shoot power is 50MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 1 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 2:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.74%Al, 2.06%Ce, 1.04%
La, 1.01%Pr, 0.44%Sm, 0.12%Nd, 0.03%Er, 0.30%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 730 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy and magnesium erbium intermediate alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 730 DEG C to be refined, essence
It is stood after refining at 720 DEG C, skimming operation after being cooled to 690 DEG C obtains magnesium alloy fused mass；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 690 DEG C, obtains Mg alloy castings, metal die temperature is 250 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 30MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 2 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 3:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.94%Al, 4.09%La, 1.09%
Sm, 0.19%Nd, 0.04%Er, 0.34%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 740 DEG C, among the magnesium lanthanum intermediate alloy, magnesium samarium after preheating is added
Alloy, magnesium neodymium intermediate alloy and magnesium erbium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 700 DEG C, obtains Mg alloy castings, metal die temperature is 200 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 30MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 3 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 4:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 4.11%Al, 2.11%Ce, 2.14%
La, 0.43%Gd, 0.01%Dy, 0.02%Yb, 0.50%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 720 DEG C, among the magnesium lanthanum intermediate alloy, magnesium cerium after preheating is added
Alloy, magnesium gadolinium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 680 DEG C, obtains Mg alloy castings, metal die temperature is 300 DEG C,
Low speed speed is 0.2m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 40MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 4 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 5:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.94%Al, 1.92%Ce, 1.01%
La, 1.06%Pr, 0.86%Gd, 0.02%Dy, 0.03%Yb, 0.34%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 740 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium gadolinium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 700 DEG C, obtains Mg alloy castings, metal die temperature is 200 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 30MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 5 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 6:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.88%Al, 1.81%Ce, 0.93%
La, 0.92%Pr, 1.29%Gd, 0.03%Dy, 0.05%Yb, 0.29%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 730 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium gadolinium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 730 DEG C to be refined, essence
It is stood after refining at 720 DEG C, skimming operation after being cooled to 690 DEG C obtains magnesium alloy fused mass；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 690 DEG C, obtains Mg alloy castings, metal die temperature is 250 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 20MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 6 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 7:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.94%Al, 1.76%Ce, 0.90%
La, 0.94%Pr, 1.72%Gd, 0.04%Dy, 0.06%Yb, 0.29%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 720 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium gadolinium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 680 DEG C, obtains Mg alloy castings, metal die temperature is 300 DEG C,
Low speed speed is 0.4m/s, and high speed speed is 3.0m/s, and pressure charging press-shoot power is 20MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 7 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 8:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.50%Al, 1.72%Ce, 0.88%
La, 0.91%Pr, 2.58%Gd, 0.05%Dy, 0.07%Yb, 0.20%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 740 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium gadolinium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 700 DEG C, obtains Mg alloy castings, metal die temperature is 200 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 50MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 8 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 9:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 4.50%Al, 2.21%Ce, 1.13%
La, 1.17%Pr, 0.40%Y, 0.06%Er, 0.03%Ho, 0.01%Tm, 0.41%Mn, other inevitable impurity are small
In 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 730 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium yttrium intermediate alloy, magnesium erbium intermediate alloy, magnesium holmium intermediate alloy, magnesium thulium intermediate alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 730 DEG C to be refined, essence
It is stood after refining at 720 DEG C, skimming operation after being cooled to 690 DEG C obtains magnesium alloy fused mass；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 690 DEG C, obtains Mg alloy castings, metal die temperature is 250 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 3.0m/s, and pressure charging press-shoot power is 30MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 9 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 10:
The alloying component (mass percent) of diecast magnesium alloy: 3.94%Al, 1.92%Ce, 2.07%La, 0.40%Gd,
0.31%Y, 0.16%Sm, 0.11%Nd, 0.34%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 740 DEG C, among the magnesium lanthanum intermediate alloy, magnesium cerium after preheating is added
Alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 700 DEG C, obtains Mg alloy castings, metal die temperature is 200 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 30MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 10 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 11:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 4.02%Al, 1.86%Ce, 1.94%
La, 0.81%Gd, 0.52%Y, 0.30%Sm, 0.24%Nd, 0.37%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 730 DEG C, among the magnesium lanthanum intermediate alloy, magnesium cerium after preheating is added
Alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 730 DEG C to be refined, essence
It is stood after refining at 720 DEG C, skimming operation after being cooled to 690 DEG C obtains magnesium alloy fused mass；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 690 DEG C, obtains Mg alloy castings, metal die temperature is 250 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 3.0m/s, and pressure charging press-shoot power is 30MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 11 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Embodiment 12:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.95%Al, 1.72%Ce, 0.88%
La, 0.93%Pr, 2.42%Y, 0.33%Er, 0.19%Ho, 0.04%Tm, 0.02%Lu, 0.24%Mn, it is other inevitable
Impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 720 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is closed
Gold, magnesium richness yttrium mixed rare earth intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 680 DEG C, obtains Mg alloy castings, metal die temperature is 300 DEG C,
Low speed speed is 0.4m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 20MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 12 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 1.
Comparative example 1
The alloying component (mass percent) of 1 diecast magnesium alloy of comparative example: 3.94%Al, 1.92%Ce, 1.01%La,
1.06%Pr, 0.34%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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) add magnesium rare earth intermediate alloy: when temperature is raised to 740 DEG C, the magnesium cerium-rich mischmetal centre after preheating is added is 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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 700 DEG C, obtains Mg alloy castings, metal die temperature is 200 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 30MPa.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 1
Warm mechanical property, test result are as shown in table 1.
Comparative example 2
The alloying component (mass percent) of 2 diecast magnesium alloy of comparative example: 3.94%Al, 1.92%Ce, 2.07%La,
0.40%Gd, 0.31%Y, 0.16%Sm, 0.11%Nd, 0.34%Mn, other inevitable impurity less than 0.2%, remaining
For Mg.
The present embodiment is related to the alloy die cast 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 or more；
(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, aluminium titanium intermediate alloy；
(4) add magnesium rare earth intermediate alloy: when temperature is raised to 740 DEG C, among the magnesium lanthanum intermediate alloy, magnesium cerium after preheating is added
Alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 700 DEG C, obtains Mg alloy castings, metal die temperature is 200 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 30MPa.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 2
Warm mechanical property, test result are as shown in table 1.Addition Ti is unhelpful to alloy mechanical property as the result is shown, utilizes inductive coupling etc.
Emission spectrometer detects alloying element, and discovery has no Ti element, this is because solid solubility of the Ti in Mg is almost nil, it is difficult to
It is added in alloy.In addition, adding the use cost that Ti element also further increases alloy into alloy.
Comparative example 3
The alloying component (mass percent) of 3 diecast magnesium alloy of comparative example: 3.94%Al, 1.92%Ce, 2.07%La,
0.40%Gd, 0.31%Y, 0.16%Sm, 0.11%Nd, 0.34%Mn, other inevitable impurity less than 0.2%, remaining
For Mg.
The present embodiment is related to the alloy die cast 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 or more；
(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, aluminium niobium intermediate alloy；
(4) add magnesium rare earth intermediate alloy: when temperature is raised to 740 DEG C, among the magnesium lanthanum intermediate alloy, magnesium cerium after preheating is added
Alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy；
(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；
Die casting process are as follows:
The magnesium alloy fused mass is subjected to die casting at 700 DEG C, obtains Mg alloy castings, metal die temperature is 200 DEG C,
Low speed speed is 0.3m/s, and high speed speed is 2.0m/s, and pressure charging press-shoot power is 30MPa.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 3
Warm mechanical property, test result are as shown in table 1.Addition Nb is unhelpful to alloy mechanical property as the result is shown, utilizes inductive coupling etc.
Emission spectrometer detects alloying element, and discovery has no Nb element, this is because solid solubility of the Nb in Mg is almost nil, it is difficult to
It is added in alloy.In addition, adding the use cost that Nb element also further increases alloy into alloy.
The tough diecast magnesium alloy of novel high-strength and 1~comparative example of comparative example that 1 1~embodiment of the embodiment of the present invention 12 of table obtains
3 obtained diecast magnesium alloy entirety, rim surface zona and center portion compartment temperature mechanical experimental results.
As shown in Table 1, the tough diecast magnesium alloy of novel high-strength that the embodiment of the present invention obtains has excellent room temperature mechanical property
Can, intensity and plasticity are improved simultaneously.The properties of embodiment 10 improve especially pronounced.
Embodiment 13
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.94%Al, 1.92%Ce, 1.01%
La, 1.06%Pr, 1.09%Sm, 0.19%Nd, 0.04%Er, 0.34%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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 or more；
(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: when pure magnesium is completely melt, after temperature reaches 670~690 DEG C, preheating is added
Fine aluminium, magnesium manganese intermediate alloy afterwards；
(4) add magnesium rare earth intermediate alloy: when temperature is raised to 720~740 DEG C, in the magnesium cerium-rich mischmetal after preheating is added
Between alloy, magnesium samarium intermediate alloy, magnesium praseodymium neodymium mixed rare-earth intermediate alloy and magnesium erbium intermediate alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 720~740 DEG C and carries out essence
Refining, is stood after refining at 720 DEG C, skimming operation after being cooled to 680~700 DEG C, and magnesium alloy fused mass is obtained, and casting obtains magnesium
Alloy cast ingot；
Die casting process are as follows:
After the magnesium alloy ingot remelting, evacuated die-casting process is carried out at 680~700 DEG C, obtains Mg alloy castings, metal
Mold temperature is 200~300 DEG C, and the effective vacuum pressure of type chamber is 10kPa, and low speed speed is 0.3m/s, and high speed speed is 2.0m/
S, pressure charging press-shoot power are 3MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 13 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 2.
Embodiment 14:
The alloying component (mass percent) of the tough diecast magnesium alloy of novel high-strength: 3.94%Al, 1.92%Ce, 1.01%
La, 1.06%Pr, 0.86%Gd, 0.02%Dy, 0.03%Yb, 0.34%Mn, other inevitable impurity less than 0.2%,
Remaining is Mg.
The present embodiment is related to the alloy die cast 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 or more；
(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: when pure magnesium is completely melt, after temperature reaches 670~690 DEG C, preheating is added
Fine aluminium, magnesium manganese intermediate alloy afterwards；
(4) add magnesium rare earth intermediate alloy: when temperature is raised to 720~740 DEG C, in the magnesium cerium-rich mischmetal after preheating is added
Between alloy, magnesium gadolinium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 720~740 DEG C and carries out essence
Refining, is stood after refining at 720 DEG C, skimming operation after being cooled to 680~700 DEG C, and magnesium alloy fused mass is obtained, and casting obtains magnesium
Alloy cast ingot；
Die casting process are as follows:
After the magnesium alloy ingot remelting, evacuated die-casting process is carried out at 680~700 DEG C, obtains Mg alloy castings, metal
Mold temperature is 200~300 DEG C, and the effective vacuum pressure of type chamber is 4kPa, and low speed speed is 0.2m/s, and high speed speed is 3.0m/
S, pressure charging press-shoot power are 30MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 14 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 2.
Embodiment 15
The alloying component (mass percent) of diecast magnesium alloy: 3.94%Al, 1.92%Ce, 2.07%La, 0.40%Gd,
0.31%Y, 0.16%Sm, 0.11%Nd, 0.34%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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 or more；
(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: when pure magnesium is completely melt, after temperature reaches 670~690 DEG C, preheating is added
Fine aluminium, magnesium manganese intermediate alloy afterwards；
(4) plus magnesium rare earth intermediate alloy: when temperature is raised to 720~740 DEG C, the magnesium lanthanum intermediate alloy, magnesium after preheating is added
Cerium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium samarium intermediate alloy, magnesium neodymium intermediate alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 720~740 DEG C and carries out essence
Refining, is stood after refining at 720 DEG C, skimming operation after being cooled to 680~700 DEG C, and magnesium alloy fused mass is obtained, and casting obtains magnesium
Alloy cast ingot；
Die casting process are as follows:
After the magnesium alloy ingot remelting, evacuated die-casting process is carried out at 680~700 DEG C, obtains Mg alloy castings, metal
Mold temperature is 200~300 DEG C, and the effective vacuum pressure of type chamber is 1kPa, and low speed speed is 0.3m/s, and high speed speed is 1.0m/
S, pressure charging press-shoot power are 50MPa.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 15 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 2.
Comparative example 4
The alloying component (mass percent) of 4 diecast magnesium alloy of comparative example: 3.94%Al, 1.92%Ce, 1.01%La,
1.06%Pr, 0.34%Mn, for other inevitable impurity less than 0.2%, remaining is Mg.
The present embodiment is related to the alloy die cast 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 or more；
(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: when pure magnesium is completely melt, after temperature reaches 670~690 DEG C, preheating is added
Fine aluminium, magnesium manganese intermediate alloy afterwards；
(4) add magnesium rare earth intermediate alloy: when temperature is raised to 720~740 DEG C, in the magnesium cerium-rich mischmetal after preheating is added
Between alloy；
(5) refining agent is added after the fusing of magnesium rare earth intermediate alloy, when melt temperature gos up to 720~740 DEG C and carries out essence
Refining, is stood after refining at 720 DEG C, skimming operation after being cooled to 680~700 DEG C, and magnesium alloy fused mass is obtained, and casting obtains magnesium
Alloy cast ingot；
Die casting process are as follows:
After the magnesium alloy ingot remelting, evacuated die-casting process is carried out at 680~700 DEG C, obtains Mg alloy castings, metal
Mold temperature is 200~300 DEG C, and the effective vacuum pressure of type chamber is 3kPa, and low speed speed is 0.3m/s, and high speed speed is 2.0m/
S, pressure charging press-shoot power are 30MPa.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 4
Warm mechanical property, test result are as shown in table 2.
Table 2 is that the tough diecast magnesium alloy of novel high-strength that 13~embodiment of the embodiment of the present invention 15 obtains and comparative example 4 obtain
Diecast magnesium alloy is whole, room-temperature mechanical property test result of rim surface zona and center portion area.
As shown in Table 2, the diecast magnesium alloy that the embodiment of the present invention obtains has excellent room-temperature mechanical property.
Embodiment 16
The tough diecast magnesium alloy of the novel high-strength that the embodiment of the present invention 15 is obtained is carried out at 175 DEG C at 32 hours timeliness
Reason, the type of cooling of the ageing treatment are water cooling.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 16 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 3.
Embodiment 17
The tough diecast magnesium alloy of the novel high-strength that the embodiment of the present invention 15 is obtained is carried out at 200 DEG C at 16 hours timeliness
Reason, the type of cooling of the ageing treatment are water cooling.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 17 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 3.
Embodiment 18
The tough diecast magnesium alloy of the novel high-strength that the embodiment of the present invention 15 is obtained is carried out at 225 DEG C at 1 hour timeliness
Reason, the type of cooling of the ageing treatment are water cooling.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 18 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 3.
Embodiment 19
The tough diecast magnesium alloy of the novel high-strength that the embodiment of the present invention 15 is obtained is carried out at 300 DEG C at solid solution in 4 hours
Reason and carries out 32 hours ageing treatments at 175 DEG C, the type of cooling of the solid solution and ageing treatment is water cooling.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 19 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 3.
Embodiment 20
The tough diecast magnesium alloy of the novel high-strength that the embodiment of the present invention 15 is obtained is carried out at 400 DEG C at solid solution in 2 hours
Reason and carries out 16 hours ageing treatments at 200 DEG C, the type of cooling of the ageing treatment is water cooling.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 20 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 3.
Embodiment 21
The tough diecast magnesium alloy of the novel high-strength that the embodiment of the present invention 15 is obtained carries out solid solution in 0.1 hour at 500 DEG C
Processing and carries out 1 hour ageing treatment at 225 DEG C, the type of cooling of the solid solution and ageing treatment is water cooling.
The tough diecast magnesium alloy entirety of novel high-strength, table that the embodiment of the present invention 21 obtains are tested using universal tensile testing machine
The room-temperature mechanical property in floor area and center portion area, test result are as shown in table 3.
Comparative example 5
The diecast magnesium alloy that comparative example 4 is obtained carries out 32 hours ageing treatments at 175 DEG C, the ageing treatment
The type of cooling is water cooling.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 5
Warm mechanical property, test result are as shown in table 3.
Comparative example 6
The diecast magnesium alloy that comparative example 4 is obtained carries out 16 hours ageing treatments at 200 DEG C, the ageing treatment
The type of cooling is water cooling.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 6
Warm mechanical property, test result are as shown in table 3.
Comparative example 7
The diecast magnesium alloy that comparative example 4 is obtained carries out 1 hour ageing treatment at 225 DEG C, the ageing treatment
The type of cooling is water cooling.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 7
Warm mechanical property, test result are as shown in table 3.
Comparative example 8
The diecast magnesium alloy that comparative example 4 is obtained carried out at 300 DEG C solution treatment in 4 hours and at 175 DEG C into
The type of cooling of 32 hours ageing treatments of row, the solid solution and ageing treatment is water cooling.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 8
Warm mechanical property, test result are as shown in table 3.
Comparative example 9
The diecast magnesium alloy that comparative example 4 is obtained carried out at 400 DEG C solution treatment in 2 hours and at 200 DEG C into
16 hours ageing treatments of row, the type of cooling of the ageing treatment are water cooling.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 9
Warm mechanical property, test result are as shown in table 3.
Comparative example 10
The diecast magnesium alloy that comparative example 4 is obtained carries out solution treatment in 0.1 hour at 500 DEG C and at 225 DEG C
1 hour ageing treatment is carried out, the type of cooling of the ageing treatment is water cooling.
The room of the diecast magnesium alloy entirety, rim surface zona and center portion area that are obtained using universal tensile testing machine test and comparison example 10
Warm mechanical property, test result are as shown in table 3.
The direct aging that 3 16~embodiment of the embodiment of the present invention 21 of table and 5~comparative example of comparative example 10 obtain handles (T5)
Or the diecast magnesium alloy room-temperature mechanical property test result after solid solution+artificial aging processing (T6).
Table 3 is it is found that the tough diecast magnesium alloy of the novel high-strength that invention is obtained carries out direct aging processing (T5) or solid solution+people
After work ageing treatment (T6), has significant solid solution aging strengthening effect, Alloy At Room Temperature mechanical property can be effectively improved.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to disclosed in the embodiment
Content.So all do not depart from the lower equivalent or modification completed of spirit disclosed in this invention, the model that the present invention protects is both fallen within
It encloses.
Claims (9)
1. a kind of diecast magnesium alloy material, it is characterised in that: be 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%, add up to the RE rare earth Gd containing d%, Y, Sm, Nd,
One or more of Er, Eu, Ho, Tm, Lu, Dy, Yb, impurity of the total amount less than 0.2%, surplus Mg, wherein a, b, c and d
Meet following formulas (1)~(4),
(1)3.5≤a≤4.5；
(2)3.5≤b≤4.5；
(3)0.2≤c≤0.5；
(4)0.01≤d≤3.0。
2. a kind of preparation method of diecast magnesium alloy material as described in claim 1, includes the following steps,
S1: molten alloy preheats pure Mg, pure Al, magnesium rare earth intermediate alloy, aluminium manganese or magnesium manganese intermediate alloy respectively；
S2: the pure Mg after preheating is completely melt in protective atmosphere；In 670~690 DEG C of pure Al being added after preheating, aluminium
Manganese or magnesium manganese intermediate alloy；When temperature is raised to 720~740 DEG C, the magnesium rare earth intermediate alloy after preheating is added；Among magnesium rare earth
Alloy is warming up to 720~740 DEG C after being completely melt, refining agent is added and is refined, is stood after refining at 710-730 DEG C,
Skimming operation after being cooled to 680~700 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 evacuated die-casting process or antivacuum die casting, obtain
Mg alloy castings.
3. a kind of preparation method of diecast magnesium alloy material according to claim 2, it is characterised in that: the step S1
In, preheating temperature is 200~250 DEG C, and preheating time is 2~6 hours.
4. a kind of preparation method of diecast magnesium alloy material according to claim 2, it is characterised in that: the step S1
In, magnesium rare earth intermediate alloy is magnesium cerium-rich mischmetal intermediate alloy, among magnesium lanthanum intermediate alloy, magnesium cerium intermediate alloy, magnesium praseodymium
Alloy, magnesium samarium intermediate alloy, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, magnesium richness yttrium mixed rare earth intermediate alloy, magnesium neodymium centre are closed
Gold, magnesium praseodymium neodymium mixed rare-earth intermediate alloy, magnesium erbium intermediate alloy, magnesium europium intermediate alloy, magnesium holmium intermediate alloy, magnesium thulium centre are closed
The combination of one or more of gold, magnesium lutetium intermediate alloy, magnesium dysprosium intermediate alloy, magnesium ytterbium intermediate alloy intermediate alloy.
5. a kind of preparation method of diecast magnesium alloy material according to claim 2, it is characterised in that: the step S2's
Protective atmosphere is SF6And CO2Mixed gas.
6. a kind of preparation method of diecast magnesium alloy material according to claim 2, it is characterised in that: the step S2's
The additional amount of refining agent is the 1-5% of all total mass of raw materiales.
7. a kind of preparation method of diecast magnesium alloy material according to claim 2, it is characterised in that: the step S3
In,
The process conditions of the evacuated die-casting process are, by magnesium alloy fused mass or magnesium alloy ingot remelting, to carry out at 680~700 DEG C
Die casting obtains Mg alloy castings, and the effective vacuum pressure of type chamber is 1~10kPa, and mold temperature is 200~300 DEG C, low speed speed
For 0.2~0.4m/s, high speed speed is 1.0~3.0m/s, and pressure charging press-shoot power is 20~50MPa；
The process conditions of the antivacuum die casting are, by magnesium alloy fused mass or magnesium alloy ingot remelting, at 680~700 DEG C into
Row die casting obtains Mg alloy castings, and metal die temperature is 200~300 DEG C, and low speed speed is 0.2~0.4m/s, high speed speed
For 1.0~3.0m/s, pressure charging press-shoot power is 20~50MPa.
8. a kind of preparation method of diecast magnesium alloy material according to claim 2, it is characterised in that: the preparation method is also
Including the Mg alloy castings that will be prepared in step S3 carry out solution treatment and artificial aging processing；
The temperature of the solution treatment is 300~500 DEG C, and the time of the solution treatment is 0.1~4 hour；
The temperature of the artificial aging processing is 175~225 DEG C, and the time of the ageing treatment is 1~32 hour.
9. casting method as claimed in claim 2, which is characterized in that the preparation method further includes, by what is prepared in step S3
Mg alloy castings carry out direct aging processing, and the temperature of the ageing treatment is 175~225 DEG C, the time of the ageing treatment
It is 1~32 hour.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881063A (en) * | 2019-04-17 | 2019-06-14 | 上海交通大学 | A kind of high tough high-modulus diecast magnesium alloy and preparation method thereof |
| CN110229984A (en) * | 2019-06-20 | 2019-09-13 | 上海交通大学 | A kind of high intensity Mg-Gd-Er-Y magnesium alloy and preparation method thereof |
| CN111270118A (en) * | 2020-03-19 | 2020-06-12 | 上海交通大学 | Corrosion-resistant ternary magnesium alloy and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240129A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Alum Co Ltd | Heat resistant magnesium alloy casting |
| CN1699612A (en) * | 2004-05-19 | 2005-11-23 | 中国科学院金属研究所 | High strength and high toughness cast magnesium alloy and preparing process thereof |
| CN104046871A (en) * | 2014-06-30 | 2014-09-17 | 中国科学院长春应用化学研究所 | Heat-resistant magnesium alloy and preparation method thereof |
-
2018
- 2018-07-23 CN CN201810812693.2A patent/CN108977711B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240129A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Alum Co Ltd | Heat resistant magnesium alloy casting |
| CN1699612A (en) * | 2004-05-19 | 2005-11-23 | 中国科学院金属研究所 | High strength and high toughness cast magnesium alloy and preparing process thereof |
| CN104046871A (en) * | 2014-06-30 | 2014-09-17 | 中国科学院长春应用化学研究所 | Heat-resistant magnesium alloy and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JINGHUAI ZHANG ETAL: "Structure stability and mechanical properties of high-pressure die-cast Mg–Al–La–Y-based alloy", 《MATERIALS SCIENCE AND ENGINEERING A》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881063A (en) * | 2019-04-17 | 2019-06-14 | 上海交通大学 | A kind of high tough high-modulus diecast magnesium alloy and preparation method thereof |
| CN110229984A (en) * | 2019-06-20 | 2019-09-13 | 上海交通大学 | A kind of high intensity Mg-Gd-Er-Y magnesium alloy and preparation method thereof |
| CN110229984B (en) * | 2019-06-20 | 2020-08-04 | 上海交通大学 | High-strength Mg-Gd-Er-Y magnesium alloy and preparation method thereof |
| CN111270118A (en) * | 2020-03-19 | 2020-06-12 | 上海交通大学 | Corrosion-resistant ternary magnesium alloy and preparation method thereof |
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