CN104561691B - High-plasticity cast aluminum alloy and pressure casting preparation method thereof - Google Patents
High-plasticity cast aluminum alloy and pressure casting preparation method thereof Download PDFInfo
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- CN104561691B CN104561691B CN201510039611.1A CN201510039611A CN104561691B CN 104561691 B CN104561691 B CN 104561691B CN 201510039611 A CN201510039611 A CN 201510039611A CN 104561691 B CN104561691 B CN 104561691B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon 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
- C22C1/026—Alloys based on aluminium
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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
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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Abstract
The invention discloses a high-plasticity cast aluminum alloy and a pressure casting preparation method thereof, belonging to the technical fields of metal materials and metallurgy. The high-plasticity cast aluminum alloy comprises the following components in percentage by weight: 7.5-14.5% of Si, 0.5-0.8% of Mg, 0.2-0.5% of Mn, 0.1-0.4% of Ti, 0.01-1.5% of RE, 0.6-1.3% of Fe, at most 100 ppm of P, 100-600 ppm of Sr and the balance of Al. The RE is one or more of Gd, Y, Nd, Sm, Er, Yb and La. After the high-plasticity cast aluminum alloy is subjected to pressure casting, the elongation percentage delta of the alloy is greater than or equal to 20%. The alloy has the advantages of excellent casting performance and low cost. The method has the advantages of simple technique, high production efficiency and obvious progress, and widens the application range of the Al-Si cast aluminum alloy.
Description
Technical field
The present invention relates to a kind of cast aluminium alloy gold and preparation method thereof, specifically a kind of high plasticity alloy cast aluminum and
Its compression casting preparation method, belongs to class of metal materials and field of metallurgy.
Background technology
Cast aluminium alloy gold as traditional metal material, because the features such as its density is little, specific strength is high, being widely used in navigating
The industries such as sky, space flight, automobile, machinery.With the development of modern industry and casting technology, to cast aluminium alloy gold, such as there is height
Intensity, the cast aluminium alloy gold of high-ductility, excellent wearability and corrosion resistance, demand is increasing.Through sending out of decades
Exhibition, high-strength aluminum alloy has formed complete series, and performance tends towards stability, and production method is gradually improved, and becomes in Material Field not
The alloy system that can or lack.But the plasticity of current high strength cast aluminum alloys is relatively low, typically can not bear larger deflection, from
And so that it is applied and limited by larger.Many needs to adopt wrought aluminium alloy manufacture the vitals of high-ductility more.But become
Although shape aluminium alloy has preferable high-ductility, its course of processing has high demands to equipment and moulds of industrial equipment, and operation is many, therefore raw
The product cycle is long, and cost is very high.By contrast, cast aluminium alloy gold has cheap, cast structure isotropism, easily produces shape
The complicated part of shape, many advantages, such as both can also be able to being produced in enormous quantities with single-piece production.Therefore, exploitation can replace part to become
Shape aluminium alloy simultaneously has the cast aluminium alloy gold of high-ductility, and its cast shaping process of specification shortens the production cycle, reduction is manufactured into
This, become the current development trend in this field.
Chinese patent cn85102364aa discloses a kind of Si-Mn-Te series aluminum casting alloy, and its component content is
5.5～9.5%si, 0.2～0.8%mn, 0.1～0.2%ti, 0.001～0.2%te, 0.1～0.2%sb, balance of al,
Elongation percentage is 16% about.But, while improving plasticity, alloy strength acutely declines this alloy, its performance nor full
The industrial at present needs of foot.In Chinese patent cn101248200a, disclose a kind of cast aluminium alloy gold, its component content
For 2.5～3.3%si, 0.2～0.7%mg, fe ＜ 0.18%, mn ＜ 0.5, ti ＜ 0.1, sr ＜ 0.03, other ＜ 0.1, remaining
Measure as al.After during this alloy as-cast condition, elongation percentage is 13%, t6 heat treatment, elongation percentage is only 5%, does not much reach high-ductility
The application demand of Casting Aluminum Alloy Based.Further, since si amount is relatively low in alloy, in tissue the eutectic scale of construction less so that alloy
Forming temperature is higher, air-breathing tendency is larger, there is the casting flaws such as the pore being difficult to avoid that, shrinkage cavity and shrinkage porosite it is difficult to obtain high
Sound casting, thus mouldability (casting character) is poor.In Chinese patent cn103305730a, disclose a kind of new al-
Si-mg-cu-sr casting alloy, its component content is 11.0～12.0%si, 0.30～0.50%cu, 0.35～0.55%mg,
0.01～0.02%sr, mn≤0.35%, zn≤0.20%, fe≤0.40%, ti≤0.10%, ni≤0.10%, pb≤
0.10%, sn≤0.10%, cr≤0.10%, other≤0.6%, balance of al.The as cast condition tensile strength of this alloy 245～
Between 275mpa, elongation percentage is between 5～8%.But, the cu element adding in this al-si system alloy can increase the heat of alloy
Split and corrosion tendency, reduce casting character, therefore limit this alloy range of application in the industry.
Content of the invention
It is generally low and do not account for aluminium alloy that the present invention is directed to the cast aluminium alloy gold plasticity that prior art exists
The deficiency of casting character.On the basis of not reducing alloy strength and casting character, there is provided a kind of high plasticity alloy cast aluminum
And its compression casting preparation method, by selecting suitable composition and technological parameter, prepare the casting with excellent elongation percentage
Aluminium alloy.
The purpose of the present invention is achieved through the following technical solutions:
In a first aspect, the present invention provides a kind of high plasticity alloy cast aluminum, as follows including component and weight content: si 7.5
～14.5%, mg 0.5～0.8%, mn 0.2～0.5%, ti 0.1～0.4%, re 0.01～1.5%, fe 0.6～
1.3%, p≤100ppm, sr 100～600ppm, balance of al；
Preferably, described re is one or more of gd, y, nd, sm, er, yb, la.
Preferably, when described re is one or more of gd, er or yb, the weight content of re is 0.05～1.0%；Institute
Stating re is one or more of y, nd, sm or la, then the preferred version of these four rare earth elements is 0.05～0.6%.
Preferably, p is 1～50ppm.
Preferably, described si, mg, mn, ti, re, fe, p, sr, al are derived from commercial-purity aluminium, silicon metal, pure magnesium, al-
Mn intermediate alloy, rare earth intermediate alloy, al-sr intermediate alloy, al-p intermediate alloy and al-ti-b intermediate alloy.
Second aspect, the present invention provide a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including with
Lower step:
The first step, molten alloy, obtain aluminium alloy melt；
Second step, carries out compression casting to described aluminium alloy melt, obtains final product high plasticity alloy cast aluminum.
Preferably, in the first step, described molten alloy comprises the steps:
(1) close in the middle of commercial-purity aluminium, silicon metal, pure magnesium, al-mn intermediate alloy, rare earth intermediate alloy, al-sr
Gold, al-p intermediate alloy and al-ti-b intermediate alloy are preheated to 100～200 DEG C, are incubated more than 2 hours；
(2) melting al, si: preheating melting utensil, to 400～500 DEG C, adds silicon metal in its bottom, on silicon metal
The 40～80% of commercial-purity aluminium gross weight needed for covering, are warming up to the temperature of commercial-purity aluminium fusing, obtain aluminium liquid；Silicon metal is in aluminium liquid
Parcel under melt, repeatedly stir after fusing, add remaining commercial-purity aluminium；
(3) plus mn, re: under the conditions of 720～740 DEG C, add al-mn intermediate alloy, dilute in step (2) gained liquation
Native intermediate alloy；
Plus sr, p (4): under the conditions of 730～750 DEG C, add in step (3) gained liquation al-sr intermediate alloy and
Al-p intermediate alloy, standing stirs 3～5 minutes after 15～30 minutes so as to abundant melt；
(5) add ti: under the conditions of 710～730 DEG C, add al-ti-b intermediate alloy in step (4) gained liquation, stir
Mix, stand 3～5 minutes；
(6) add mg: under the conditions of 700～720 DEG C, add pure magnesium in step (5) gained liquation, fully melt；
(7) refine: under the conditions of 710～740 DEG C, add refining agent, 10～20 points of refine in step (6) gained liquation
Clock, stands 15～40 minutes, is cooled to 660～700 DEG C, skims surface scum, obtain final product aluminium alloy melt.
Preferably, in step (1), described preheating specially adopts baking oven.
Preferably, in step (2), described smelting device is specially crucible；The temperature of commercial-purity aluminium fusing is on 680 DEG C of left sides
Right；Described stirring adopts graphite rod.
Preferably, in step (7), described refining agent is the aluminium alloy that conventional commercial contains the inorganic salts such as sodium salt, potassium salt, villiaumite
Refining agent or hexachlorethane, its consumption is less than or equal to the 5% of described high plasticity alloy cast aluminum weight.
Preferably, in second step, in described compression casting, the pouring temperature of aluminium alloy melt is 660～700 DEG C, injection
Speed is 0.2～3.0m/s, and casting mould preheating temperature is 200～300 DEG C.
When rare earth adding quantity is different, rare earth is main in aluminium alloy to be existed with three kinds of forms: solid solution in the base, segregation
In phase boundary, crystal boundary and dendrite circle, it is solid-solubilized in compound or is existed with compound form.After adding rare earth element in the alloy,
Rare earth one side plays limited solid solution strengthening, improves the effect of intensity, and another aspect Rare-Earth Element Chemistry activity is extremely strong, Ke Yi
Selective absorption on the crystal grain boundary grown up, hinders the growth of crystal grain, crystal grain thinning, puies forward heavy alloyed mechanical property, especially
Plasticity.When increasing the content of rare earth further, the intermetallic compound Dispersed precipitate that rare earth is formed with the element such as al, mg, si
In matrix, during making alloy fracture, crack initiation position is changed with extension approach, puies forward heavy alloyed plasticity.Rare earth unit
The addition of element can also improve the casting character of cast aluminium alloy gold, this is because fe is harmful impurity in aluminium alloy, great majority
The crystalline structure of Copper component is all very thick, directly affects the mechanical performance of alloy, drops low-alloyed mobility and plasticity, increases
Structural heterogenity, adds rare earth, then can change the existing forms of iron phase, put forward heavy alloyed casting character and its plasticity.Separately
Outward, p and sr can effectively put forward heavy alloyed plasticity to the rotten of primary crystal si and eutectic si.
Compared with prior art, the present invention has a following beneficial effect:
(1) add rare earth element in cast aluminium alloy gold of the present invention, by the tune of optimizing components and series of process parameter
Whole, obtain that crystal grain is tiny, fine and close, composition uniformly, Dispersed precipitate in the rich re intermetallic compound of matrix and lack flawless group
Knit, its plasticity can be significantly improved on the basis of not reducing alloy strength, can preferably meet industrial service demand；
(2) aluminium alloy according to present component extrusion casint preparation, compared with existing al-si system alloy, its room temperature is strong
Degree does not substantially reduce but plasticity obtains and is greatly improved, and the foundry goods of die casting tests its room temperature tensile intensity σ >=280mpa, elongation percentage
δ >=20%, breaches that other al-si system cast aluminium alloy gold intensity are higher but the relatively low bottleneck of plasticity, its higher intensity and prolonging
The rate of stretching can meet the demand to such material for the industry；
(3) the alloy casting character of present invention preparation is excellent, with low cost, process is simple, and production efficiency is high, progressive aobvious
Write, expand the range of application of al-si system cast aluminium alloy gold.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, some deformation can also be made and improve.These broadly fall into the present invention
Protection domain.In the present invention, involved various intermediate alloys and refining agent are commercially available prod.
Embodiment 1
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present embodiment provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
7.5%si, 0.5%mg, 0.2%mn, 0.1%ti, 0.05%y, 0.6%fe, 20ppm p, 100ppm sr, other can not be kept away
The impurity exempted from is less than 0.2%, and remaining is al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 100 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 100 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 400
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 730 DEG C and adds al-mn intermediate alloy, al-5y intermediate alloy, stirring makes it be completely melt；(4) it is warming up to 740 DEG C
Add al-sr intermediate alloy and al-p intermediate alloy, stand 15 minutes；(5) it is cooled to 710 DEG C of addition al-ti-b intermediate alloys,
Stirring, stands 3～5 minutes；(6), in the pure magnesium press-in aluminum alloy melt being wrapped up aluminium foil with bell jar when 700 DEG C, stirring makes it fill
Fractional melting；(7) it is warming up to when 720 DEG C and carries out refine, refining agent selects the three-in-one refining agent of aluminium alloy, the addition of refining agent is
The refining agent that aluminium foil wraps up is pressed into horizontal turning movement, about 10min in aluminium liquid with bell jar during refine by the 1% of aluminium alloy gross weight
The content of hydrogen is surveyed in refine after finishing, and carries out stokehold inspection；
Second step, stands 20min under 660 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 660 DEG C, mold temperature is 200 DEG C, injection speed 0.2m/s.
The high-plasticity aluminum alloy room temperature tensile intensity of die casting in the present embodiment is 282mpa, elongation percentage 20.3%.
Embodiment 2
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present embodiment provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
8.5%si, 0.6%mg, 0.3%mn, 0.2%ti, 1.5%gd, 0.7%fe, 40ppm p, 200ppm sr, other can not be kept away
The impurity exempted from is less than 0.2%, and remaining is al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 200 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 200 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 450
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 720 DEG C and adds al-mn intermediate alloy, mg-90gd intermediate alloy, stirring makes it be completely melt；(4) it is warming up to 730
DEG C add al-sr intermediate alloy and al-p intermediate alloy, stand 15 minutes；(5) it is cooled to 720 DEG C and add conjunction in the middle of al-ti-b
Gold, stirring, stand 3～5 minutes；(6), in the pure magnesium press-in aluminum alloy melt being wrapped up aluminium foil with bell jar when 710 DEG C, stirring makes
It fully melts；(7) it is warming up to when 730 DEG C and carries out refine, refining agent selects hexachlorethane, and the addition of refining agent is aluminium alloy
The refining agent that aluminium foil wraps up is pressed into horizontal turning movement in aluminium liquid with bell jar during refine, about 10min refine is complete by the 1% of gross weight
Survey the content of hydrogen after finishing, and carry out stokehold inspection；
Second step, stands 30min under 680 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 680 DEG C, mold temperature is 225 DEG C, injection speed 0.5m/s.
The high-plasticity aluminum alloy room temperature tensile intensity of die casting in the present embodiment is 286mpa, elongation percentage 20.0%.
Embodiment 3
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present invention provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
9.5%si, 0.7%mg, 0.4%mn, 0.3%ti, 0.1%gd, 0.1%y, 0.02%nd, 0.8%fe, 60ppm p,
300ppmsr, other inevitable impurity are less than 0.2%, and remaining is al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 200 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 200 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 500
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 730 DEG C and add conjunction in the middle of al-mn intermediate alloy, mg-90gd intermediate alloy, mg-25y intermediate alloy, mg-90nd
Gold, stirring makes it be completely melt；(4) it is warming up to 740 DEG C and adds al-sr intermediate alloy and al-p intermediate alloy, stand 15 minutes；
(5) it is cooled to 730 DEG C of addition al-ti-b intermediate alloys, stirring, stand 3～5 minutes；(6) when 720 DEG C with bell jar by aluminium foil
In the pure magnesium press-in aluminum alloy melt of parcel, stirring makes it fully melt；(7) it is warming up to and carried out with aluminum refining agent when 740 DEG C
Refine, the addition of refining agent is the 2% of aluminium alloy gross weight, with bell jar, the refining agent that aluminium foil wraps up is pressed in aluminium liquid during refine
Horizontal turning movement, the content of hydrogen is surveyed in about 10min refine after finishing, and carries out stokehold inspection；
Second step, stands 30min under 700 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 700 DEG C, mold temperature is 250 DEG C, injection speed 1.0m/s.
The high-plasticity aluminum alloy room temperature tensile intensity of die casting in the present embodiment is 286mpa, elongation percentage 20.2%.
Embodiment 4
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present invention provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
10.5%si, 0.8%mg, 0.5%mn, 0.4%ti, 0.2%gd, 0.3%y, 0.15%nd, 0.02%sm, 0.9%fe,
80ppm p, 400ppm sr, other inevitable impurity are less than 0.2%, and remaining is al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 200 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 220 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 400
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 720 DEG C and add conjunction in the middle of al-mn intermediate alloy, mg-90gd intermediate alloy, al-5y intermediate alloy, mg-90nd
Gold, mg-20sm intermediate alloy, stirring makes it be completely melt；(4) it is warming up to 730 DEG C to add in the middle of al-sr intermediate alloy and al-p
Alloy, stands 15 minutes；(5) it is cooled to 710 DEG C of addition al-ti-b intermediate alloys, stirring, stand 3～5 minutes；(6) 700
DEG C when the pure magnesium press-in aluminum alloy melt that aluminium foil wrapped up with bell jar in, stirring makes it fully melt；(7) enter when being warming up to 710 DEG C
Row refine, refining agent selects hexachlorethane, and the addition of refining agent is the 5% of aluminium alloy gross weight, with bell jar by aluminium foil during refine
Horizontal turning movement in the refining agent press-in aluminium liquid of parcel, the content of hydrogen is surveyed in about 10min refine after finishing, and carries out stokehold inspection
Look into；
Second step, stands 40min under 680 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 680 DEG C, mold temperature is 300 DEG C, injection speed 2.0m/s.
The high-plasticity aluminum alloy room temperature tensile intensity of die casting in the present embodiment is 287mpa, elongation percentage 20.5%.
Embodiment 5
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present embodiment provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
10.5%si, 0.8%mg, 0.5%mn, 0.4%ti, 0.1%gd, 0.1%y, 0.05%nd, 0.2%sm, 0.1%er,
1.0%fe, 90ppm p, 500ppm sr, other inevitable impurity are less than 0.2%, and remaining is al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 200 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 200 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 420
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 720 DEG C and add conjunction in the middle of al-mn intermediate alloy, mg-90gd intermediate alloy, al-5y intermediate alloy, mg-90nd
Gold, mg-20sm intermediate alloy, al-20er intermediate alloy, stirring makes it be completely melt；(4) it is warming up to 730 DEG C to add in al-sr
Between alloy and al-p intermediate alloy, stand 15 minutes；(5) it is cooled to 710 DEG C of addition al-ti-b intermediate alloys, stirring, stand 3
～5 minutes；(6), in the pure magnesium press-in aluminum alloy melt being wrapped up aluminium foil with bell jar when 700 DEG C, stirring makes it fully melt；(7)
It is warming up to when 710 DEG C and carries out refine with aluminum refining agent, the addition of refining agent is the 2% of aluminium alloy gross weight, use during refine
The refining agent that aluminium foil wraps up is pressed into horizontal turning movement in aluminium liquid by bell jar, and the content of hydrogen is surveyed in about 10min refine after finishing, go forward side by side
Row stokehold checks；
Second step, stands 20min under 690 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 690 DEG C, mold temperature is 200 DEG C, injection speed 3.0m/s.
The high-plasticity aluminum alloy room temperature tensile intensity of die casting in the present embodiment is 281mpa, elongation percentage 20.3%.
Embodiment 6
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present invention provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
11.5%si, 0.6%mg, 0.3%mn, 0.2%ti, 0.05%gd, 0.1%y, 0.05%nd, 0.02%sm, 0.7%er,
0.02%la, 1.3%fe, 100ppm p, 600ppm sr, other inevitable impurity are less than 0.2%, and remaining is al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 200 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 240 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 430
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 730 DEG C and add conjunction in the middle of al-mn intermediate alloy, mg-90gd intermediate alloy, al-5y intermediate alloy, mg-90nd
Gold, mg-20sm intermediate alloy, al-20er intermediate alloy, al-20la intermediate alloy, stirring makes it be completely melt；(4) it is warming up to
740 DEG C add al-sr intermediate alloy and al-p intermediate alloy, stand 15 minutes；(5) it is cooled to 720 DEG C to add in the middle of al-ti-b
Alloy, stirring, stand 3～5 minutes；(6) in the pure magnesium press-in aluminum alloy melt with bell jar, aluminium foil being wrapped up when 710 DEG C, stirring
It is made fully to melt；(7) it is warming up to when 720 DEG C and carries out refine, refining agent selects hexachlorethane, and the addition of refining agent is alloy
The refining agent that aluminium foil wraps up is pressed into horizontal turning movement in aluminium liquid, about 10min refine with bell jar during refine by the 2% of liquid gross weight
Survey the content of hydrogen after finishing, and carry out stokehold inspection；
Second step, stands 30min under 670 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 670 DEG C, mold temperature is 200 DEG C, injection speed 1.0m/s.
The high-plasticity aluminum alloy room temperature tensile intensity of die casting in the present embodiment is 284mpa, elongation percentage 20.4%.
Embodiment 7
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present invention provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
13.5%si, 0.6%mg, 0.3%mn, 0.2%ti, 0.05%gd, 0.05%y, 0.02%nd, 0.02%sm, 0.1%er,
0.6%la, 0.1%yb, 1.2%fe, 10ppm p, 200ppm sr, other inevitable impurity are less than 0.2%, and remaining is
al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 200 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 200 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 440
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 730 DEG C and add conjunction in the middle of al-mn intermediate alloy, mg-90gd intermediate alloy, al-5y intermediate alloy, mg-90nd
Gold, mg-20sm intermediate alloy, al-20er intermediate alloy, al-20la intermediate alloy, al-10yb intermediate alloy, stirring makes it complete
Running down；(4) it is warming up to 740 DEG C and adds al-sr intermediate alloy and al-p intermediate alloy, stand 15 minutes；(5) it is cooled to 720
DEG C add al-ti-b intermediate alloy, stirring, stand 3～5 minutes；(6) the pure magnesium pressure with bell jar, aluminium foil wrapped up when 710 DEG C
Enter in aluminum alloy melt, stirring makes it fully melt；(7) it is warming up to and carry out refine with aluminum refining agent when 720 DEG C, refining agent
Addition is the 3% of aluminium alloy gross weight, with bell jar, the refining agent that aluminium foil wraps up is pressed into horizontal turning movement in aluminium liquid during refine,
The content of hydrogen is surveyed in about 10min refine after finishing, and carries out stokehold inspection；
Second step, stands 30min under 690 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 690 DEG C, mold temperature is 200 DEG C, injection speed 1.5m/s.
The high-plasticity aluminum alloy room temperature tensile intensity of die casting in the present embodiment is 287mpa, elongation percentage 20.1%.
Embodiment 8
The present embodiment is related to a kind of high plasticity alloy cast aluminum and its compression casting preparation method.
In a first aspect, the present invention provides a kind of high plasticity alloy cast aluminum, described al alloy component (weight content) is:
14.5%si, 0.6%mg, 0.3%mn, 0.2%ti, 0.05%gd, 0.05%y, 0.02%nd, 0.02%sm, 0.1%er,
0.02%la, 0.7%yb, 1.1%fe, 10ppm p, 200ppm sr, other inevitable impurity are less than 0.2%, and remaining is
al.
Second aspect, the present embodiment provides a kind of compression casting preparation method of described high plasticity alloy cast aluminum, including
Following steps:
The first step, molten alloy, obtain aluminium alloy melt；Wherein, the technique of described molten alloy concretely comprises the following steps: (1)
Melting raw material is preheated to 200 DEG C in an oven, is incubated more than 2 hours, the rust cleaning of the surface clean such as Slag Tool, bell jar is coated
Coating, this coating adds appropriate water mediation to form using 25% Pulvis Talci and 5% waterglass, then is placed in the baking of stove surface, dries
Roasting temperature is 200 DEG C, and baking was cleared up, to prevent increasing ferrum in fusion process for the alloy after 1 hour；(2) preheated crucible is to 400
DEG C, add silicon metal in crucible bottom, cover 2/3 of required fine aluminium amount after drying on silicon metal, heat up together, fine aluminium exists
680 DEG C about melt, silicon slowly melts under the parcel of aluminium liquid, is repeatedly stirred with graphite rod after fusing, adds remaining fine aluminium；
(3) it is cooled to 730 DEG C and add conjunction in the middle of al-mn intermediate alloy, mg-90gd intermediate alloy, al-5y intermediate alloy, mg-90nd
Gold, mg-20sm intermediate alloy, al-20er intermediate alloy, al-20la intermediate alloy, al-10yb intermediate alloy, stirring makes it complete
Running down；(4) it is warming up to 740 DEG C and adds al-sr intermediate alloy and al-p intermediate alloy, stand 15 minutes；(5) it is cooled to 720
DEG C add al-ti-b intermediate alloy, stirring, stand 3～5 minutes；(6) the pure magnesium pressure with bell jar, aluminium foil wrapped up when 710 DEG C
Enter in aluminum alloy melt, stirring makes it fully melt；(7) it is warming up to when 720 DEG C and carries out refine, refining agent selects hexachlorethane, essence
The addition of refining agent is the 3% of aluminium alloy gross weight, with bell jar, the refining agent that aluminium foil wraps up is pressed into level in aluminium liquid circuitous during refine
Backhaul dynamic, the content of hydrogen is surveyed in about 10min refine after finishing, and carries out stokehold inspection；
Second step, stands 30min under 690 DEG C of pouring temperature, skims surface scum, obtains aluminium alloy melt, cast
Prepare；Aluminium alloy melt temperature is kept to be 690 DEG C, mold temperature is 200 DEG C, injection speed 2.5m/s.
In the present embodiment, the high-plasticity aluminum alloy room temperature tensile intensity of casting is 284mpa, elongation percentage 20.6%.
In sum, the present invention passes through the optimization of alloy compositions and preparation method, obtains a kind of alloy strength and plasticity is simultaneous
Standby aluminium alloy, compared with prior art, has significantly progressive and substantive distinguishing features, specifically visible table 1 below.
Table 1 is cast aluminium alloy gold of the present invention and room-temperature property pair under the conditions of compression casting for the existing cast Al-Si alloy
Than
| Alloy designations (condition of heat treatment) | Tensile strength (mpa) | Elongation percentage (%) |
| Cn103146962a patent (f) | ≥225 | ≥6 |
| Cn103898376a patent (f) | ≥280 | 5～12 |
| zl107a(t5) | 420～470 | 4～6 |
| yl112(f) | ≥330 | ≥3 |
| a380(t5) | ≥310 | ≥3.2 |
| Patent (t5) of the present invention | ≥280 | ≥20 |
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various modifications or modification within the scope of the claims, this not shadow
Ring the flesh and blood of the present invention.
Claims (5)
1. a kind of high plasticity alloy cast aluminum compression casting preparation method it is characterised in that described preparation method include following
Step:
The first step, molten alloy, obtain aluminium alloy melt；
Second step, carries out compression casting to described aluminium alloy melt, obtains final product high plasticity alloy cast aluminum；Wherein, described high-ductility
Cast aluminium alloy gold includes component and weight content is as follows: si 7.5～14.5%, mg 0.5～0.8%, mn 0.2～0.5%,
Ti 0.1～0.4%, re 0.01～1.5%, fe 0.6～1.3%, p≤100ppm, sr 100～600ppm, balance of al；
In the first step, described molten alloy comprises the steps:
(1) by commercial-purity aluminium, silicon metal, pure magnesium, al-mn intermediate alloy, rare earth intermediate alloy, al-sr intermediate alloy,
Al-p intermediate alloy and al-ti-b intermediate alloy are preheated to 100～200 DEG C, are incubated more than 2 hours；
(2) melting al, si: preheating melting utensil, to 400～500 DEG C, adds silicon metal in its bottom, covers on silicon metal
The 40～80% of required commercial-purity aluminium gross weight, are warming up to the temperature of commercial-purity aluminium fusing, obtain aluminium liquid；Silicon metal is in the bag of aluminium liquid
Wrap up in lower fusing, repeatedly stir after fusing, add remaining commercial-purity aluminium；
(3) mn, re are added: under the conditions of 720～740 DEG C, add in al-mn intermediate alloy, rare earth in step (2) gained liquation
Between alloy；
(4) sr, p are added: under the conditions of 730～750 DEG C, add in al-sr intermediate alloy and al-p in step (3) gained liquation
Between alloy, standing after 15～30 minutes stirring 3～5 minutes so as to abundant melt；
(5) add ti: under the conditions of 710～730 DEG C, in step (4) gained liquation, add al-ti-b intermediate alloy, stir, quiet
Put 3～5 minutes；
(6) add mg: under the conditions of 700～720 DEG C, add pure magnesium in step (5) gained liquation, fully melt；
(7) refine: under the conditions of 710～740 DEG C, the addition refining agent in step (6) gained liquation, refine 10～20 minutes,
Standing 15～40 minutes, is cooled to 660～700 DEG C, skims surface scum, obtain final product aluminium alloy melt.
2. the compression casting preparation method of high plasticity alloy cast aluminum according to claim 1 is it is characterised in that step
(1), in, described preheating specially adopts baking oven.
3. the compression casting preparation method of high plasticity alloy cast aluminum according to claim 1 is it is characterised in that step
(2), in, described smelting device is specially crucible；Described stirring adopts graphite rod.
4. the compression casting preparation method of high plasticity alloy cast aluminum according to claim 1 is it is characterised in that step
(7), in, described refining agent is that conventional commercial contains sodium salt, potassium salt, the aluminum refining agent of villiaumite inorganic salt or hexachlorethane.
5. the compression casting preparation method of high plasticity alloy cast aluminum according to claim 1 is it is characterised in that second step
In, in described compression casting, the pouring temperature of aluminium alloy melt is 660～700 DEG C, and injection speed is 0.2～3.0m/s, casting
Mold preheating temperature is 200～300 DEG C.
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| CN104878256A (en) * | 2015-05-20 | 2015-09-02 | 柳州市百田机械有限公司 | High-compactness die-cast aluminum alloy |
| CN104878229A (en) * | 2015-05-29 | 2015-09-02 | 柳州普亚贸易有限公司 | Preparation method of high-strength anticorrosive aluminum alloy for doors and windows |
| CN105463269B (en) * | 2015-12-01 | 2018-07-03 | 上海交通大学 | High-strength, highly corrosion resistant cast aluminium alloy gold and its compression casting preparation method |
| CN105483465B (en) * | 2015-12-21 | 2018-07-31 | 河北立中有色金属集团有限公司 | A kind of die casting Al-Si-Mg cast aluminium alloy golds and preparation method thereof |
| CN105568080B (en) * | 2016-01-27 | 2017-12-01 | 广西平果铝合金精密铸件有限公司 | A kind of aluminum alloy die casting and preparation method thereof |
| CN108642336B (en) * | 2018-06-25 | 2020-10-16 | 上海交通大学 | Extrusion casting aluminum alloy material and preparation method thereof |
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| CN110643862A (en) * | 2019-10-25 | 2020-01-03 | 安徽镁美科技有限公司 | Aluminum alloy for new energy automobile battery shell and pressure casting preparation method thereof |
| CN111500903A (en) * | 2020-04-02 | 2020-08-07 | 科曼车辆部件系统(苏州)有限公司 | Non-heat-treatment type high-strength high-toughness cast aluminum alloy and preparation method thereof |
| CN112063899A (en) * | 2020-09-14 | 2020-12-11 | 肇庆新联昌金属实业有限公司 | High-plasticity aluminum alloy and preparation method thereof |
| CN114231799B (en) * | 2021-12-10 | 2022-11-22 | 申源创(上海)新材料科技有限公司 | Non-heat-treatment high-toughness die-casting aluminum-silicon alloy and preparation method thereof |
| CN114438380B (en) * | 2022-01-26 | 2023-07-21 | 南通鸿劲金属铝业有限公司 | Heat-treatment-free high-toughness AlSi aluminum alloy and preparation method thereof |
| CN114717454A (en) * | 2022-04-13 | 2022-07-08 | 佛山市南海创利有色金属制品有限公司 | Al-Si series aluminum alloy liquid and preparation method thereof |
| CN117248132A (en) * | 2023-11-17 | 2023-12-19 | 华劲新材料研究院(广州)有限公司 | Preparation process of high-strength high-conductivity aluminum alloy mobile phone middle plate |
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