CN109868397A - A kind of high tough high-modulus aluminum alloy materials and its die-casting process - Google Patents
A kind of high tough high-modulus aluminum alloy materials and its die-casting process Download PDFInfo
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Abstract
The invention belongs to technical field of metal material, more particularly to a kind of high tough high-modulus aluminum alloy materials and its die-casting process, the aluminum alloy materials are made of the following element of mass percentage, Mg:2.5~6.0%, the one or two of rare earth element ce, La: 0.01~1.2%, one or both of Mn, Cr, V or more: 2.0~10.0%, surplus Al, impurity≤0.45%.The room temperature comprehensive mechanical property of the aluminum alloy materials is excellent, and elasticity modulus is high.
Description
Technical field
The invention belongs to technical field of metal material, and in particular to a kind of high tough high-modulus aluminum alloy materials and its die casting
Technique.
Background technique
Aluminium alloy is the alloy general name using aluminium as base.Main alloy element has copper, silicon, magnesium, zinc, manganese, secondary alloying element
There are nickel, iron, titanium, chromium, lithium etc..Aluminium alloy is most widely used one kind non-ferrous metal structural material in industry, in aviation, boat
It, automobile, machine-building, widely applied in ship and chemical industry.
Aluminium alloy density is low, but intensity is relatively high, and near or above high-quality steel, plasticity is good, can be processed into various profiles, tool
There are excellent electric conductivity, thermal conductivity and corrosion stability, be industrially widely used, usage amount is only second to steel.Aluminium alloy is in vapour in recent years
Vehicle industrial application is more and more, and to aluminium alloy capability, more stringent requirements are proposed for the application of automobile industry, some important components, such as
Automobile clamp not only require aluminium alloy intensity with higher, while also needing high elasticity modulus, beyond used at present normal
Elasticity modulus with aluminium alloy elasticity modulus range, usual aluminium alloy is 72GPa, is unable to satisfy it and is used to prepare auto parts and components
Requirement.
In the prior art, the method for improving aluminium alloy elasticity modulus mainly has alloying and Composite；Wherein, alloying
Method, which mainly passes through, to be added lithium (Li) and prepares aluminium lithium alloy, as Chinese patent literature CN105648283A disclose a kind of low-density,
High rigidity Casting Al-Li Alloy and preparation method thereof, elasticity modulus is not less than 78GPa, but Li element property is active, at high cost, main
It is used for aerospace field；SiC, Ti is mainly added in Composite method2The particle preparations aluminum matrix composite such as B, such as China are specially
Sharp document CN106834833A discloses a kind of high-modulus, the strong TiB of superelevation2Particle REINFORCED Al-Zn-Mg-Cu composite material and its system
Preparation Method can obtain the aluminium alloy of high-modulus, but its complex process, at high cost, be mainly used for aerospace field, compel to be essential
It wants that development technology is simple, the low-cost tough high-modulus aluminium alloy of height is for automotive field, pushes automotive light weight technology development.
Summary of the invention
The main object of the present invention is to provide a kind of high tough high-modulus aluminum alloy materials, the material mechanical performance is excellent,
Elasticity modulus is high, solves aluminium alloy elasticity modulus used and intensity in automotive light weight technology technique in the prior art and is unable to satisfy use
It is required that the problem of.
It is a further object of the present invention to provide the die-casting process of above-mentioned aluminum alloy materials, technology stability is good.
The purpose of the present invention can be achieved through the following technical solutions:
In a first aspect, high tough high-modulus aluminum alloy materials, are made of, Mg:2.5% the following element of mass percentage
~6.0%, the one or two of rare earth element ce, La: 0.01%~1.2%, one or both of Mn, Cr, V or more:
2.0%~10.0%, surplus Al, impurity≤0.45%.Preferably, the Al and Mg are respectively selected from commercial-purity aluminium and technical pure
Magnesium；
The rare earth element ce, La are added respectively with Al-RE intermediate alloys；
Described Mn, Cr, V are added respectively with aluminium manganese, aluminium chromium, aluminium vanadium intermediate alloy.
It is furthermore preferred that the Al-RE intermediate alloys are in aluminium-cerium intermediate alloy, aluminium-cerium-rich mischmetal or aluminium-lanthanum
Between at least one of alloy.
Second aspect, the die-casting process of the above-mentioned tough high-modulus aluminum alloy materials of height, includes the following steps:
S1: molten alloy prepares aluminium alloy melt；
S2: aluminium alloy melt is subjected to die casting at 680~740 DEG C, pressure is 50~200MPa, injection speed 1.0
~4.0m/s, cooling rate are 100~1000K/s, and aluminium alloy castings are prepared；Wherein, step S1 include it is following step by step:
(1) baking material: by commercial-purity aluminium, pure magnesium, Al-RE intermediate alloys, Al-Ti-B intermediate alloy, aluminium manganese, aluminium chromium,
Aluminium vanadium intermediate alloy raw material is preheated to 200~300 DEG C respectively, keeps the temperature 0.5~2 hour；
(2) melting: being added commercial-purity aluminium when temperature is to 200~300 DEG C, stirring is to melting down；Melt is warming up to 740~800
After DEG C, Al-RE intermediate alloys, aluminium-manganese, aluminium-chromium, aluminium-vanadium intermediate alloy, until melting down is added；Melt temperature is down to 730~
At 740 DEG C, pure magnesium fusing is added, indentation melt is stirred to melting down；
(3) refine: melt is warming up to 735-745 DEG C, and refining agent is added and carries out refining 10~20 minutes；Skimming operation, it is quiet
Set melt；
(4) degasification: coverture is added in resulting melt to preparing in step (3), 5~10 points are stirred in protective atmosphere
Clock obtains aluminium alloy melt.
Preferably, raw material described in step (1) keeps the temperature 1 hour at 200~300 DEG C；Reasonable soaking time is guaranteeing to dry
Under conditions of dry, shorten the baking material time, it is energy saving.
Preferably, in step (2), Al-RE intermediate alloys, aluminium-manganese, aluminium-chromium, aluminium-are added when melt temperature is 780 DEG C
Vanadium intermediate alloy is stirred to melting down.It can make alloying element rapid melting and spread uniformly, reduce the aggregate and precipitate of alloying element.
Preferably, in the step (3), the refining agent is the aluminum refining agent of sodium-free salt, and the addition of refining agent
Amount is the 0.2%~1.5% of melt gross mass；Refining agent is added when melt is warming up to 740 DEG C to be refined, when making refining process
Between it is sufficient, guarantee refining effect.
Preferably, the protective atmosphere that the step (4) uses is N2Protection；The coverture is MgCl2With KCl mass ratio
For the mixture of 3:2, and the additive amount of coverture is the 0.2%~1.5% of melt gross mass.
Compared with prior art, the beneficial effects of the present invention are:
(1) base alloy Al-Mg have excellent obdurability, the present invention using composite alloying into matrix alloy simultaneously
One of Mn, Cr, V or a variety of and rare earth element ce, La is added, reaches and improves alloy elastic modulus, and keep excellent
Mechanical property.
(2) one of Mn, Cr, V or a variety of is added, main purpose is that a certain number of high-modulus are formed in aluminum substrate
Intermetallic compound, such as Al6Mn、Al7Cr、Al10V etc. reaches the elasticity modulus for improving alloy；And rare earth element ce, La are to upper
Stating intermetallic compound has metamorphism, and Ce, La can be enriched in nascent Al in molten aluminum6Mn、Al7Cr、Al10The surface of V phase, suppression
It makes it and grows and change the direction of growth, improve morphology of primary phase, by coarse gill shape Al6Mn、Al7Cr、Al10V phase transition is at small
Block, graininess Al6Mn、Al7Cr、Al10V phase alleviates isolate effect of the intermetallic compound to matrix, to keep matrix alloy
Excellent mechanical property, and the purpose with high-modulus.
(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:
In following specific embodiments and comparative example, it is all made of the elasticity modulus of resonance method measurement alloy material, reference
" GB/T22315-2008: metal material elasticity modulus and Poisson's ratio test method "；Using the drawing of room temperature tensile method beta alloy
Mechanical property is stretched, referring to " GB/T228-2002: metal material tensile testing at ambient temperature ".
Embodiment 1
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are made of the following element of mass percentage
For Mg:2.6%, Ce:0.3%, La:0.2%, Cr:5.0%, and inevitable impurity F e≤0.3%, Si≤
0.15%, Al surplus.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum, aluminium-chromium intermediate alloy is added, stirs evenly, until melting down；720 are down to melt temperature
DEG C when, pure magnesium is added, fusing and stirs evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, essence of dusting is added
Refining agent (ancient cooking vessel minister) is refined, and continues 10~20 minutes, takes surface scum after refining off, stands melt；(4) degasification: to melt
730 DEG C are warming up to, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 points
Clock obtains aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 720 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 2.0m/s, cooling rate 500K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 367MPa of die casting, yield strength 220MPa stretch in the present embodiment
Long rate 6.0%, elasticity modulus are 88.1GPa.
Embodiment 2
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:4.1%, Ce:0.2%, La:0.1%, Mn:1.0%, Cr:1.0%, V:1.0%, and inevitable impurity F e≤
0.3%, Si≤0.15%, Al surplus.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum, aluminium-manganese, aluminium-chromium, aluminium-vanadium intermediate alloy is added, stirs evenly, until melting down；It is fusion
When temperature is down to 720 DEG C, pure magnesium, fusing is added, and stir evenly, until melting down；(3) it refines, to melt temperature to 740
DEG C, injection refining agent (ancient cooking vessel minister) is added and is refined, continues 10~20 minutes, takes surface scum after refining off, stands melt；
(4) degasification: 730 DEG C are warming up to melt, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen
It mixes, continues 5~10 minutes, obtain aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 730 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 2.0m/s, cooling rate 350K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 381MPa of die casting, yield strength 216MPa stretch in the present embodiment
Long rate 8.0%, elasticity modulus are 85.6GPa.
Embodiment 3
The tough high-modulus aluminum alloy materials of height provided in this embodiment, form Mg by the following element of mass percentage:
4.3%, La:0.01%, Cr:0.1%, and inevitable impurity F e≤0.3%, Si≤0.15%, Al surplus.Its die carter
Skill are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and addition aluminium-lanthanum, aluminium-chromium intermediate alloy stir evenly, until melting down；When melt temperature is down to 720 DEG C, add
Enter pure magnesium, melts, and stir evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, injection refining agent (ancient cooking vessel is added
Minister) it is refined, continue 10~20 minutes, take surface scum after refining off, stands melt；(4) it degasification: is warming up to melt
730 DEG C, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 minutes, is obtained
Aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 690 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 4.0m/s, cooling rate 1000K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 558MPa of die casting, yield strength 207MPa stretch in the present embodiment
Long rate 6.5%, elasticity modulus are 85.3GPa.
Embodiment 4
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:4.4%, Ce:0.5%, Mn:5.0%, and inevitable impurity F e≤0.3%, Si≤0.15%, Al surplus.Its die casting
Technique are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-manganese intermediate alloy is added, stirs evenly, until melting down；When melt temperature is down to 720 DEG C,
Pure magnesium, fusing is added, and stirs evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, injection refining agent is added
(ancient cooking vessel minister) is refined, and continues 10~20 minutes, takes surface scum after refining off, stands melt；(4) it degasification: heats up to melt
To 730 DEG C, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, is continued 5~10 minutes, is obtained
Obtain aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 720 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 2.0m/s, cooling rate 200K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 361MPa of die casting, yield strength 210MPa stretch in the present embodiment
Long rate 6.2%, elasticity modulus are 87.0GPa.
Embodiment 5
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:2.8%, Ce:0.3%, La:0.3%, V:5.0%, and more than inevitable impurity F e≤0.3%, Si≤0.15%, Al
Amount.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum, aluminium-vanadium intermediate alloy is added, stirs evenly, until melting down；720 are down to melt temperature
DEG C when, pure magnesium is added, fusing and stirs evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, essence of dusting is added
Refining agent (ancient cooking vessel minister) is refined, and continues 10~20 minutes, takes surface scum after refining off, stands melt；(4) degasification: to melt
730 DEG C are warming up to, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 points
Clock obtains aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 720 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 1.0m/s, 300 DEG C of mould temperature, cooling rate 100K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 398MPa of die casting, yield strength 210MPa stretch in the present embodiment
Long rate 8.5%, elasticity modulus are 86.1GPa.
Embodiment 6
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:4.2%, Ce:0.01%, Mn:3.0%, Cr:2.0%, and inevitable impurity F e≤0.3%, Si≤0.15%, Al
Surplus.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum, aluminium-chromium, aluminium-manganese intermediate alloy is added, stirs evenly, until melting down；To melt temperature
When being down to 720 DEG C, pure magnesium, fusing is added, and stir evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, adds
Enter injection refining agent (ancient cooking vessel minister) to be refined, continue 10~20 minutes, take surface scum after refining off, stands melt；(4) it removes
Gas: 730 DEG C are warming up to melt, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred, is held as coverture, inflated with nitrogen
It is 5~10 minutes continuous, obtain aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 690 DEG C for the aluminum melt,
Die casting is carried out, pressure 50MPa, injection speed is 2.0m/s, cooling rate 200K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 367MPa of die casting, yield strength 201MPa stretch in the present embodiment
Long rate 7.4%, elasticity modulus are 87.1GPa.
Embodiment 7
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:4.5%, La:0.5%, Cr:3.0%, V:2.0%, and more than inevitable impurity F e≤0.3%, Si≤0.15%, Al
Amount.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-lanthanum, aluminium-chromium, aluminium-vanadium intermediate alloy is added, stirs evenly, until melting down；720 are down to melt temperature
DEG C when, pure magnesium is added, fusing and stirs evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, essence of dusting is added
Refining agent (ancient cooking vessel minister) is refined, and continues 10~20 minutes, takes surface scum after refining off, stands melt；(4) degasification: to melt
730 DEG C are warming up to, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 points
Clock obtains aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 720 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 2.0m/s, cooling rate 200K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 328MPa of die casting, yield strength 205MPa stretch in the present embodiment
Long rate 6.0%, elasticity modulus are 89.3Pa.
Embodiment 8
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:4.5%, Ce:0.1%, La:0.4%, Mn:2.0%, Cr:3.0%, and inevitable impurity F e≤0.3%, Si≤
0.15%, Al surplus.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum, aluminium-manganese, aluminium-chromium intermediate alloy is added, stirs evenly, until melting down；To melt temperature
When being down to 720 DEG C, pure magnesium, fusing is added, and stir evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, adds
Enter injection refining agent (ancient cooking vessel minister) to be refined, continue 10~20 minutes, take surface scum after refining off, stands melt；(4) it removes
Gas: 730 DEG C are warming up to melt, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred, is held as coverture, inflated with nitrogen
It is 5~10 minutes continuous, obtain aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 690 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 3.0m/s, cooling rate 800K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 336MPa of die casting, yield strength 203MPa stretch in the present embodiment
Long rate 5.8%, elasticity modulus are 89.5GPa.
Embodiment 9
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:3.0%, Ce:0.9%, La:0.3%, Mn:10.0%, and inevitable impurity F e≤0.3%, Si≤0.15%, Al
Surplus.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum, aluminium-manganese intermediate alloy is added, stirs evenly, until melting down；720 are down to melt temperature
DEG C when, pure magnesium is added, fusing and stirs evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, essence of dusting is added
Refining agent (ancient cooking vessel minister) is refined, and continues 10~20 minutes, takes surface scum after refining off, stands melt；(4) degasification: to melt
730 DEG C are warming up to, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 points
Clock obtains aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 740 DEG C for the aluminum melt,
Die casting is carried out, pressure 200MPa, injection speed is 2.0m/s, cooling rate 500K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 330MPa of die casting, yield strength 220MPa stretch in the present embodiment
Long rate 5.1%, elasticity modulus are 92.5GPa.
Embodiment 10
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:4.5%, La:1.2%, Mn:5.0%, Cr:5.0%, and more than inevitable impurity F e≤0.3%, Si≤0.15%, Al
Amount.Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-lanthanum, aluminium-manganese, aluminium-chromium intermediate alloy is added, stirs evenly, until melting down；720 are down to melt temperature
DEG C when, pure magnesium is added, fusing and stirs evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, essence of dusting is added
Refining agent (ancient cooking vessel minister) is refined, and continues 10~20 minutes, takes surface scum after refining off, stands melt；(4) degasification: to melt
730 DEG C are warming up to, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 points
Clock obtains aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 730 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 3.0m/s, cooling rate 200K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 328MPa of die casting, yield strength 223MPa stretch in the present embodiment
Long rate 5.2%, elasticity modulus are 93.4GPa.
Embodiment 11
The tough high-modulus aluminum alloy materials of height provided in this embodiment, are become by the following element group of mass percentage
Mg:4.1%, Ce:1.2%, Mn:3.0%, Cr:4.0%, V:3.0% and inevitable impurity F e≤0.3%, Si≤
0.15%, Al surplus.
Its die-casting process are as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum, aluminium-manganese, aluminium-chromium, aluminium-vanadium intermediate alloy is added, stirs evenly, until melting down；It is fusion
When temperature is down to 720 DEG C, pure magnesium, fusing is added, and stir evenly, until melting down；(3) it refines, to melt temperature to 740
DEG C, injection refining agent (ancient cooking vessel minister) is added and is refined, continues 10~20 minutes, takes surface scum after refining off, stands melt；
(4) degasification: 730 DEG C are warming up to melt, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen
It mixes, continues 5~10 minutes, obtain aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 730 DEG C for the aluminum melt,
Die casting is carried out, pressure 150MPa, injection speed is 2.0m/s, cooling rate 200K/s.
The high tough high-modulus aluminium alloy room temperature tensile intensity 339MPa of die casting, yield strength 214MPa stretch in the present embodiment
Long rate 7.2%, elasticity modulus are 94.5GPa.
Comparative example 1
The high tough high-modulus aluminum alloy materials of the die casting that this comparative example provides, are made of the following element of mass percentage
Mg:2.5%, Ce:0.3%, La:0.2%, and inevitable impurity F e≤0.3%, Si≤0.15%, Al surplus.Its die casting
Method is as follows:
A, molten alloy obtains aluminium alloy melt.Melting step are as follows: (1) baking material preheats raw material 2 hours at 250 DEG C；
(2) melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；
Melt is warming up to 760 DEG C, and aluminium-cerium, aluminium-lanthanum intermediate alloy is added, stirs evenly, until melting down；720 DEG C are down to melt temperature
When, pure magnesium, fusing is added, and stir evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, injection refining is added
Agent (ancient cooking vessel minister) is refined, and continues 10~20 minutes, takes surface scum after refining off, stands melt；(4) degasification: to melt liter
60%MgCl is added to 730 DEG C in temperature2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 minutes,
Obtain aluminium alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 720 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 2.0m/s, cooling rate 200K/s.
Pack alloy room temperature tensile intensity 386MPa in this comparative example, yield strength 224MPa, elongation 12.6%, bullet
Property modulus is 71.2GPa.
Comparative example 2
The high tough high-modulus aluminum alloy materials of the die casting that this comparative example provides, are made of the following element of mass percentage
Mg:2.5%, Cr:5.0%, and inevitable impurity F e≤0.3%, Si≤0.15%, Al surplus.Its pressure casting method is as follows:
A, molten alloy obtains aluminium alloy melt.Melting step: (1) baking material preheats raw material 2 hours at 250 DEG C；(2)
Melting, melting furnace set 800 DEG C of smelting temperature, when furnace temperature rises to 300 DEG C, and commercial-purity aluminium is added, until it is melting down, it stirs evenly；It is molten
Body is warming up to 760 DEG C, and aluminium-chromium intermediate alloy is added, stirs evenly, until melting down；When melt temperature is down to 720 DEG C, work is added
The pure magnesium of industry, fusing, and stir evenly, until melting down；(3) it refines, to melt temperature to 740 DEG C, is added injection refining agent (ancient cooking vessel minister)
It is refined, continues 10~20 minutes, take surface scum after refining off, stand melt；(4) 730 degasification: are warming up to melt
DEG C, 60%MgCl is added2The constituent of+40%KCl is simultaneously stirred as coverture, inflated with nitrogen, continues 5~10 minutes, obtains aluminium
Alloy melt.
B, melt is subjected to die casting, obtains aluminium alloy.Casting step: being poured die casting machine at 720 DEG C for the aluminum melt,
Die casting is carried out, pressure 100MPa, injection speed is 2.0m/s, cooling rate 200K/s.
Pack alloy room temperature tensile intensity 284MPa in this comparative example, yield strength 202MPa, elongation 3.1%, bullet
Property modulus is 85.3GPa.
Tables 1 and 2 respectively to the alloying component, mechanical property and elasticity modulus of embodiment 1~11 and comparative example 1 and 2 into
Statistics is gone.
Table 1: embodiment alloying component (mass fraction, %)
| No. | Mg | Ce | La | Mn | Cr | V | Al |
| Embodiment 1 | 2.6 | 0.3 | 0.2 | 0 | 5.0 | 0 | Bal. |
| Embodiment 2 | 2.5 | 0.2 | 0.1 | 1.0 | 1.0 | 1.0 | Bal. |
| Embodiment 3 | 2.7 | 0 | 0.01 | 0 | 2.0 | 0 | Bal. |
| Embodiment 4 | 2.5 | 0.5 | 0 | 5.0 | 0 | 0 | Bal. |
| Embodiment 5 | 2.8 | 0.3 | 0.3 | 0 | 0 | 5.0 | Bal. |
| Embodiment 6 | 4.5 | 0.01 | 0 | 3.0 | 2.0 | 0 | Bal. |
| Embodiment 7 | 4.5 | 0 | 0.5 | 0 | 3.0 | 2.0 | Bal. |
| Embodiment 8 | 4.5 | 0.1 | 0.4 | 2.0 | 3.0 | 0 | Bal. |
| Embodiment 9 | 4.5 | 0.9 | 0.3 | 10.0 | 0 | 0 | Bal. |
| Embodiment 10 | 4.5 | 0 | 1.2 | 5.0 | 5.0 | 0 | Bal. |
| Embodiment 11 | 4.1 | 1.2 | 0 | 3.0 | 4.0 | 3.0 | Bal. |
| Comparative example 1 | 2.5 | 0.3 | 0.2 | 0 | 0 | 0 | Bal. |
| Comparative example 2 | 2.5 | 0 | 0 | 0 | 5.0 | 0 | Bal. |
Table 2: the tensile property and elasticity modulus of alloy
One or both of Mn/Cr/V or more is added simultaneously and lacks by base alloy Al-Mg it can be seen from table 1 and 2
After rare earth element ce/La of amount, the elasticity modulus of alloy, which significantly improves, (to be improved to 85GPa or more) by 71.2GPa, and is able to maintain
High obdurability (elongation is greater than 5.1%, and yield strength is greater than 200MPa, and tensile strength is greater than 320MPa).
Claims (8)
1. a kind of high tough high-modulus aluminum alloy materials, it is characterised in that: be made of the following element of mass percentage, Mg:
2.5%~6.0%, the one or two of rare earth element ce, La: 0.01%~1.2%, one or both of Mn, Cr, V and
More than: 2.0%~10.0%, surplus Al, impurity≤0.45%.
2. the tough high-modulus aluminum alloy materials of height according to claim 1, it is characterised in that:
The Al and Mg are respectively selected from commercial-purity aluminium and pure magnesium；
The rare earth element ce, La are added respectively with Al-RE intermediate alloys；
Described Mn, Cr, V are added respectively with aluminium manganese, aluminium chromium, aluminium vanadium intermediate alloy.
3. the tough high-modulus aluminum alloy materials of height according to claim 2, it is characterised in that: closed among the aluminium-rare-earth
Gold is at least one of aluminium-cerium intermediate alloy, aluminium-cerium-rich mischmetal or aluminium-lanthanum intermediate alloy.
4. the die-casting process of the described in any item high tough high-modulus aluminum alloy materials of claims 1 to 3, it is characterised in that: packet
Include following steps:
S1: molten alloy prepares aluminium alloy melt；
S2: carrying out die casting for aluminium alloy melt at 680~740 DEG C, and pressure is 50~200MPa, and injection speed is 1.0~
4.0m/s, cooling rate are 100~1000K/s, and aluminium alloy castings are prepared；Wherein, step S1 include it is following step by step:
(1) baking material: by commercial-purity aluminium, pure magnesium, Al-RE intermediate alloys, Al-Ti-B intermediate alloy, aluminium manganese, aluminium chromium, aluminium vanadium
Intermediate alloy raw material is preheated to 200~300 DEG C respectively, keeps the temperature 0.5~2 hour；
(2) melting: being added commercial-purity aluminium when temperature is to 200~300 DEG C, stirring is to melting down；After melt is warming up to 740~800 DEG C,
Al-RE intermediate alloys, aluminium-manganese, aluminium-chromium, aluminium-vanadium intermediate alloy, until melting down is added；Melt temperature is down to 730~740 DEG C
When, pure magnesium fusing is added, indentation melt is stirred to melting down；
(3) refine: melt is warming up to 735-745 DEG C, and refining agent is added and carries out refining 10~20 minutes；Skimming operation is stood molten
Body；
(4) degasification: coverture is added in resulting melt to preparing in step (3), stirs 5~10 minutes, obtains in protective atmosphere
Obtain aluminium alloy melt.
5. the die-casting process of aluminum alloy materials according to claim 4, it is characterised in that: in step (1), the raw material exists
200~300 DEG C keep the temperature 1 hour.
6. the die-casting process of aluminum alloy materials according to claim 4, it is characterised in that: in step (2), melt temperature is
Al-RE intermediate alloys, aluminium-manganese, aluminium-chromium, aluminium-vanadium intermediate alloy are added at 780 DEG C to stir to melting down.
7. the die-casting process of aluminum alloy materials according to claim 4, it is characterised in that: in step (3),
The refining agent be sodium-free salt aluminum refining agent, and the additive amount of refining agent be melt gross mass 0.2%~
1.5%；
Refining agent is added when the melt is warming up to 740 DEG C to be refined.
8. the die-casting process of aluminum alloy materials according to claim 4, it is characterised in that: in step (4),
The protective atmosphere used is N2Protection；
The coverture is MgCl2The mixture for being 3:2 with KCl mass ratio, and the additive amount of coverture is melt gross mass
0.2%~1.5%.
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| CN114855037A (en) * | 2022-03-23 | 2022-08-05 | 厦门华艺英芯半导体有限公司 | Lithium-containing die-cast aluminum alloy material suitable for anodic oxidation and preparation method thereof |
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| CN1851019A (en) * | 2006-06-01 | 2006-10-25 | 北京工业大学 | Er,Zr composite rein forced Al-Mg-Mn alloy |
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| CN114855037A (en) * | 2022-03-23 | 2022-08-05 | 厦门华艺英芯半导体有限公司 | Lithium-containing die-cast aluminum alloy material suitable for anodic oxidation and preparation method thereof |
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