CN107937765A - A kind of high-strength anti-corrosion die-casting aluminium alloy and its pressure casting method - Google Patents
A kind of high-strength anti-corrosion die-casting aluminium alloy and its pressure casting method Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 72
- 238000005260 corrosion Methods 0.000 title claims abstract description 41
- 238000004512 die casting Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005266 casting Methods 0.000 title claims abstract description 20
- 239000000956 alloy Substances 0.000 claims abstract description 159
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 158
- 239000012535 impurity Substances 0.000 claims abstract description 35
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 30
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 26
- 239000010703 silicon Substances 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 238000007670 refining Methods 0.000 claims abstract description 17
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000007872 degassing Methods 0.000 claims abstract description 8
- 239000011777 magnesium Substances 0.000 claims description 35
- 239000002994 raw material Substances 0.000 claims description 34
- 229910052782 aluminium Inorganic materials 0.000 claims description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 30
- 239000004411 aluminium Substances 0.000 claims description 27
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 13
- 229910052737 gold Inorganic materials 0.000 claims description 13
- 239000010931 gold Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 23
- 238000005275 alloying Methods 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- 235000010210 aluminium Nutrition 0.000 description 34
- 239000012071 phase Substances 0.000 description 29
- 230000000052 comparative effect Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 230000005496 eutectics Effects 0.000 description 8
- 229910018566 Al—Si—Mg Inorganic materials 0.000 description 6
- ZBZJXHCVGLJWFG-UHFFFAOYSA-N trichloromethyl(.) Chemical compound Cl[C](Cl)Cl ZBZJXHCVGLJWFG-UHFFFAOYSA-N 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 3
- 229910018191 Al—Fe—Si Inorganic materials 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 241000555268 Dendroides Species 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 208000030303 breathing problems Diseases 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
A kind of high-strength anti-corrosion die-casting aluminium alloy and its pressure casting method, its component and mass percent are：Si 9.6~10.4%, Mg0.4~0.6%, Fe 0.3~0.5%, Ti 0.1~0.3%, Tc 0.01~0.03%, B 0.002~0.006%, Ba 0.01~0.03%, Ge 0.005~0.015%, remaining is Al and inevitable impurity.Its pressure casting method comprises the following steps：Dispensing, smelting aluminium alloy liquid, refining degasification slagging-off, addition grain refiner, Fe-riched phase alterant and silicon phase alterant, stirring and casting forming.The present invention is on the basis of Si, Mg main alloying element is optimized, and by microalloy treatment fine degenerate richness Fe phases, common reciever and primary Si phase, improves the intensity and plasticity of pack alloy.Pack alloy of the present invention is suitable for that casting forming is various to ask intensity, plasticity and corrosion resistance higher aluminum alloy spare part.
Description
Technical field
The invention belongs to aluminium alloy compression casting field, is specifically related to a kind of high-strength anti-corrosion die-casting aluminium alloy and its die casting side
Method.
Background technology
Al-Si-Mg series die-casting alloy aluminums belong to hypoeutectic al-si alloy, due to without Cu elements, thus with excellent
The features such as corrosion resistance and preferable heat crack resistance, air-tightness and mobility, it is widely used in that to bear underload, shape multiple
Miscellaneous thin-walled die casting parts, such as various instrument housings, automobile casing, gear box oil pump case, wheelhouse portions, crankshaft of motorcycle
Case, cycle wheel etc..With the light-weighted development of the vehicles such as automobile, motorcycle, aluminum alloy die casting is constantly to thin-walled
Change development, this requires pack alloy to have the intensity of higher and moulding.Although existing Al-Si-Mg series die-casting alloy aluminums have
The features such as excellent corrosion resistance and preferable heat crack resistance, air-tightness and mobility, but intensity it is general it is relatively low, moulding compared with
The problem of poor, becomes increasingly conspicuous, and significantly limit the application of Al-Si-Mg series die-casting alloy aluminums.
Existing Al-Si-Mg series die-casting alloy aluminums low strength, the reason for plasticity is poor, be the Fe of pack alloy first
Content is higher, Fe be typically in the form of thick needle-shaped Al-Fe-Si systems richness Fe phases in aluminium alloy there are in alloy matrix aluminum,
This thick needle-shaped richness Fe phases belong to hard and crisp intermetallic compound phase in itself, can seriously isolate aluminum substrate, become aluminium conjunction
The formation of crack and direction of crack propagation of golden forced breakage.Secondly although Al-Si-Mg series die-casting alloy aluminums belong to hypoeutectic aluminium silicon
Alloy, but Si contents are higher, and for Si in aluminium alloy in addition to existing in the form of needle-shaped eutectic Si, it is with thick to also have small part Si
Block primary silicon form exists, and needle-shaped eutectic Si and thick block primary Si phase belong to hard crisp phase, equally can seriously isolate aluminium
Matrix, reduces the intensity and plasticity of aluminium alloy.Therefore, existing Al-Si-Mg series die-casting alloy aluminums and its pressure casting method still need to be changed
Into and development.
The content of the invention
It is an object of the invention to there are problem and shortage for above-mentioned, there is provided a kind of high-strength anti-corrosion die-casting aluminium alloy and its
Pressure casting method, by microalloy treatment fine degenerate richness Fe phases, common reciever and primary Si phase, improves the strong of pack alloy
Degree and plasticity, meet various to intensity, plasticity and the more demanding aluminum alloy die casting needs of corrosion resistance.
The technical proposal of the invention is realized in this way：
High-strength anti-corrosion die-casting aluminium alloy of the present invention, its main feature is that being made of the component of following mass percent：Si
9.6~10.4%, Mg 0.4~0.6%, Fe 0.3~0.5%, Ti 0.1~0.3%, Tc 0.01~0.03%, B 0.002
~0.006%, Ba 0.01~0.03%, Ge 0.005~0.015%, remaining is Al and inevitable impurity, wherein, Tc
Mass ratio with B is 5:The mass ratio of 1, Ba and Ge is 2:1, inevitable single content≤0.05% of impurity, total impurities
≤ 0.15%.
The pressure casting method of high-strength anti-corrosion die-casting aluminium alloy of the present invention, its main feature is that comprising the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold, Al10Ti alloys, Al5Tc1B alloys, Al5Ba alloys and Al5Ge alloys are raw material；
Second step：Aluminium ingot is accounted for into the speed that raw material gross weight is 9.6~10.4% in 700~740 DEG C of heating fusings, addition
Molten silicon, 0.4~0.6% magnesium ingot and 0.5~1.5% Al20Fe alloys, stirring are fused into aluminum alloy melt；
3rd step：After refining degasification slagging-off is carried out to aluminum alloy melt, it is 1~3% to add and account for raw material gross weight
Al10Ti alloys, 0.2~0.6% Al5Tc1B alloys, 0.2~0.6% Al5Ba alloys and 0.1~0.3% Al5Ge are closed
Gold, the component that stirring enables aluminum alloy to liquid are uniform；
4th step：680~700 DEG C of pouring temperature, 190~210 DEG C of cavity temperature, 2.1~2.4 meter per second of injection speed,
30~50MPa of injection ratio pressure and aluminum alloy melt is cast into aluminium alloy under the conditions of 3~8 seconds dwell times, is obtained after cooling high-strength
Ruselite.
Compared with prior art, the invention has the advantages that：
(1) present invention is gone bad richness on the basis of Si, Mg main alloying element is optimized by adding Al5Tc1B alloy refinements
Fe phases, compound addition Al5Ba alloys and Al5Ge alloy refinements go bad eutectic Si and primary Si phase, improve the strong of pack alloy
Degree and plasticity.
(2) after the present invention is by refining degasification slagging-off, Al10Ti, Al5Tc1B, Al5Ba alloy is added and Al5Ge is closed
Gold, is conducive to give full play to refinement change of Ti, Tc, B, Ba, Ge element to the refining effect of α-Al crystal grain and to rich Fe phases, Si phases
Matter acts on, it is ensured that pack alloy obtains high intensity and plasticity.
(3) the room temperature tensile intensity of pack alloy of the present invention is more than 250MPa, and elongation is more than 8%, and corrosion rate is small
In 2 × 10-3/mg·cm-2·h-1, meet various to intensity, plasticity and the more demanding aluminum alloy die casting need of corrosion resistance
Will.
Embodiment
The component of high-strength anti-corrosion die-casting aluminium alloy of the present invention is formed below meaning and content range restriction reason into
Row explanation.
High-strength anti-corrosion die-casting aluminium alloy of the present invention, its main feature is that being made of the component of following mass percent：Si
9.6~10.4%, Mg 0.4~0.6%, Fe 0.3~0.5%, Ti 0.1~0.3%, Tc 0.01~0.03%, B 0.002
~0.006%, Ba 0.01~0.03%, Ge 0.005~0.015%, remaining is Al and inevitable impurity, wherein, Tc
Mass ratio with B is 5:The mass ratio of 1, Ba and Ge is 2:1, inevitable single content≤0.05% of impurity, total impurities
≤ 0.15%.
Si can form Al+Si eutectic liquid phases in pack alloy with Al, improve the mobility of pack alloy, at the same time also
The machining property of pack alloy can be improved.Si contents are higher, and the mobility and machining property of pack alloy are all
It is better, but the plasticity of pack alloy can be gradually reduced.Si contents are less than 9.6%, the illiquidity of pack alloy, it is difficult to
Meet the die-casting process requirement of shape and structure complex parts.When Si contents are more than 10.4%, the plasticity of pack alloy can go out
Now it is remarkably decreased.Therefore, in order to ensure that pack alloy has enough a mobility and plasticity, the selection of Si contents 9.6~
10.4%.
Mg can form Mg in pack alloy2Si hardening constituents strengthen the intensity of aluminium alloy.Mg contents are higher, and die casting aluminium closes
The intensity of gold is also higher, but the plasticity of pack alloy can be gradually reduced.Mg contents are less than 0.4%, the intensity of pack alloy
250MPa is not reached.And Mg contents more than 0.6% when, can substantially reduce pack alloy it is moulding, elongation does not reach 7%.
Therefore, in order to ensure pack alloy obtains enough intensity and plasticity, Mg contents are selected 0.4~0.6%.
Effects of the Fe in pack alloy mainly prevents die casting sticking to mould, is conducive to the die casting demoulding.Fe contents are got over
Height, is more conducive to the demoulding of pack alloy part.Fe is inevitable impurity element in aluminium ingot, and purity is 99.7% aluminium ingot
Usually contain 0.2% Fe.But Fe exists in pack alloy usually in the form of thick needle-shaped Al-Fe-Si systems richness Fe phases,
This thick needle-shaped richness Fe phases belong to crisp and hard intermetallic compound in itself, can seriously isolate aluminum substrate, become die casting aluminium conjunction
The formation of crack and direction of crack propagation of golden forced breakage, this is the weight for causing existing pack alloy low strength, plasticity poor
Want reason.In addition, the Fe in pack alloy is easily formed from electrochemical corrosion is coupled with Al, the corrosion resistant of pack alloy is reduced
Corrosion energy.But when rich Fe phases fine degenerate is the graininess of fine uniform, then it can eliminate rich Fe relative intensities and plasticity
Influence, and the corrosion resistance of pack alloy can also be improved.Consider release property, the mechanical property of pack alloy
With the factor such as corrosion resistance, therefore, Fe contents are selected 0.3~0.5%.
Ti primarily serves the effect of refinement α-Al crystal grain in pack alloy, and the structural constituent for improving pack alloy is equal
Even property, improves the intensity and plasticity of pack alloy.Ti contents are less than 0.1%, grain refining effect unobvious.Ti contents are got over
Height, grain refining effect are better.The Ti of addition 0.1~0.3%, can make the α-Al crystal grain of pack alloy from thick dendroid
Be refined as fine uniform etc. shaft-like, improve the structural constituent uniformity of pack alloy, improve pack alloy intensity and
Plasticity.Therefore, the selection of Ti contents is 0.1~0.3%.
Tc, B main function in pack alloy are fine degenerate richness Fe phases.Inventor passes through many experiments exploratory development
After find, the Tc elements and 0.002~0.006% B element of compound addition 0.01~0.03%, and the mass ratio of Tc and B is
5:When 1, in the process of setting of pack alloy, it effectively can suppress and change richness Fe phases by the reciprocation of Tc and B
The orientation of growth, makes rich Fe phases from the graininess that thick needle-shaped fine degenerate is fine uniform, so as to eliminate thick needle-shaped richness Fe
With respect to the influence of pack alloy intensity and plasticity, the intensity and plasticity of pack alloy are improved.
The effect of Ba, Ge in pack alloy is mainly fine degenerate eutectic Si and primary Si phase.The prior art is usual
Using Na, Sr come fine degenerate common reciever, using P element come fine degenerate primary Si phase.But Na, Sr fine degenerate easily draw
Send out aluminum alloy melt air-breathing, and P to the fine degenerate of primary Si phase at present also there are effect is unstable, easy oxidizing fire and lose
The problem of.For inventor by being found after many experiments exploratory development, Ba elements have the common reciever of pack alloy of the present invention
There is good fine degenerate effect, its positive effect is better than existing Na, Sr element, there is not yet and triggers aluminum alloy melt air-breathing
Problem.And Ge has primary silicon stable fine degenerate effect, the problem of loss there is no oxidizing fire.When compound addition
0.01~0.03% Ba and 0.005~0.015% Ge, and the mass ratio of Ba and Ge is 2:When 1, to eutectic Si and it can come into being
Si carries out sufficient fine degenerate, needle-shaped eutectic Si and thick block primary silicon is changed into small uniform graininess Si phases, disappears
Except the influence of needle-shaped eutectic Si and thick block primary silicon to pack alloy intensity and plasticity, the intensity of pack alloy is improved
And plasticity.
The pressure casting method of high-strength anti-corrosion die-casting aluminium alloy of the present invention is illustrated below.
The pressure casting method of high-strength anti-corrosion die-casting aluminium alloy of the present invention, its main feature is that comprising the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold, Al10Ti alloys, Al5Tc1B alloys, Al5Ba alloys and Al5Ge alloys are raw material；
Second step：Aluminium ingot is accounted for into the speed that raw material gross weight is 9.6~10.4% in 700~740 DEG C of heating fusings, addition
Molten silicon, 0.4~0.6% magnesium ingot and 0.5~1.5% Al20Fe alloys, stirring are fused into aluminum alloy melt；
3rd step：After refining degasification slagging-off is carried out to aluminum alloy melt, it is 1~3% to add and account for raw material gross weight
Al10Ti alloys, 0.2~0.6% Al5Tc1B alloys, 0.2~0.6% Al5Ba alloys and 0.1~0.3% Al5Ge are closed
Gold, the component that stirring enables aluminum alloy to liquid are uniform；
4th step：680~700 DEG C of pouring temperature, 190~210 DEG C of cavity temperature, 2.1~2.4 meter per second of injection speed,
30~50MPa of injection ratio pressure and aluminum alloy melt is cast into aluminium alloy under the conditions of 3~8 seconds dwell times, is obtained after cooling high-strength
Ruselite.
The elements such as Mn, Ni, Zn, Sn, Pb are inevitable impurity elements in aluminium ingot, instant silicon, these impurity elements exist
Hard and crisp or low melting point intermetallic compound can be formed in pack alloy, easily becomes splitting for pack alloy forced breakage
Line source and direction of crack propagation, deteriorate the intensity and plasticity of pack alloy.In addition, these impurity elements are in pack alloy
Easily formed with Al from electrochemical corrosion is coupled, reduce the corrosion resistance of pack alloy.Therefore, these impurity elements are necessary
Strictly controlled.The present invention is used as by aluminium ingot, 99.9% instant silicon and 99.95 magnesium ingot for selecting purity to be 99.7%
Single content≤0.05% of the impurity element such as main raw material(s), controllable Mn, Ni, Zn, Sn, Pb, total impurities≤0.15%,
Ensure that pack alloy obtains high intensity, plasticity and corrosion resistance.
Ti, Tc, Ba, Ge belong to micro alloying element in pack alloy of the present invention, if before refining degasification slagging-off
These elements are added, are easily lost in refining degasification slag removal, do not have corresponding fine degenerate effect.And refining
Add Al10Ti alloys, Al5Tc1B alloys, Al5Ba alloys and Al5Ge alloys after degasification slagging-off, be conducive to give full play to Ti,
Tc, Ba, Ge element act on the fine degenerate of α-Al crystal grain, richness Fe phases and Si phases, it is ensured that the high intensity of pack alloy acquisition,
Plasticity and corrosion resistance.
Technical scheme is further described with reference to specific embodiment and comparative example, so as to more preferable
Understanding technical scheme.
Embodiment 1：
Pack alloy is made of the component of following mass percent：Si 9.6%, Mg 0.4%, Fe 0.3%, Ti
0.1%, Tc 0.01%, B 0.002%, Ba 0.01%, Ge 0.005%, remaining is Al and inevitable impurity, can not
Single content≤0.05% of impurity avoided, total impurities≤0.15%.The pressure casting method of pack alloy comprises the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold, Al10Ti alloys, Al5Tc1B alloys, Al5Ba alloys and Al5Ge alloys are raw material；
Second step：Aluminium ingot is accounted for into the instant silicon that raw material gross weight is 9.6%, 0.4% in 740 DEG C of heating fusings, addition
Magnesium ingot and 0.5% Al20Fe alloys, stirring be fused into aluminum alloy melt；
3rd step：With account for raw material gross weight be 0.5% carbon trichloride refining slagging-off is carried out to aluminum alloy melt after, add
Account for the Al10Ti alloys, 0.2% Al5Tc1B alloys, 0.2% Al5Ba alloys and 0.1% that raw material gross weight is 1%
Al5Ge alloys, the component that stirring enables aluminum alloy to liquid are uniform；
4th step：700 DEG C of pouring temperature, 190 DEG C of cavity temperature, 2.1 meter per second of injection speed, injection ratio pressure 50MPa and
Aluminum alloy melt is cast into aluminium alloy under the conditions of 8 seconds dwell times, high-strength anti-corrosion die-casting aluminium alloy is obtained after cooling.
Embodiment 2：
Pack alloy is made of the component of following mass percent：Si 10%, Mg 0.5%, Fe 0.4%, Ti
0.2%, Tc 0.02%, B 0.004%, Ba 0.02%, Ge 0.01%, remaining is Al and inevitable impurity, can not be kept away
Single content≤0.05% of impurity exempted from, total impurities≤0.15%.The pressure casting method of pack alloy comprises the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold, Al10Ti alloys, Al5Tc1B alloys, Al5Ba alloys and Al5Ge alloys are raw material；
Second step：By aluminium ingot in 720 DEG C of heating fusings, the instant silicon, 0.5% for accounting for that raw material gross weight is 10% are added
Magnesium ingot and 1% Al20Fe alloys, stirring are fused into aluminum alloy melt；
3rd step：With account for raw material gross weight be 0.5% carbon trichloride refining slagging-off is carried out to aluminum alloy melt after, add
Account for the Al10Ti alloys, 0.4% Al5Tc1B alloys, 0.4% Al5Ba alloys and 0.2% that raw material gross weight is 2%
Al5Ge alloys, the component that stirring enables aluminum alloy to liquid are uniform；
4th step：690 DEG C of pouring temperature, 200 DEG C of cavity temperature, 2.3 meter per second of injection speed, injection ratio pressure 40MPa and
Aluminum alloy melt is cast into aluminium alloy under the conditions of 5 seconds dwell times, high-strength anti-corrosion die-casting aluminium alloy is obtained after cooling.
Embodiment 3：
Pack alloy is made of the component of following mass percent：Si 10.4%, Mg 0.6%, Fe 0.5%, Ti
0.3%, Tc0.03%, B 0.006%, Ba 0.03%, Ge 0.015%, remaining is Al and inevitable impurity, can not be kept away
Single content≤0.05% of impurity exempted from, total impurities≤0.15%.The pressure casting method of pack alloy comprises the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold, Al10Ti alloys, Al5Tc1B alloys, Al5Ba alloys and Al5Ge alloys are raw material；
Second step：Aluminium ingot is accounted for into the instant silicon that raw material gross weight is 10.4%, 0.6% in 700 DEG C of heating fusings, addition
Magnesium ingot and 1.5% Al20Fe alloys, stirring be fused into aluminum alloy melt；
3rd step：With account for raw material gross weight be 0.5% carbon trichloride refining slagging-off is carried out to aluminum alloy melt after, add
Account for the Al10Ti alloys, 0.6% Al5Tc1B alloys, 0.6% Al5Ba alloys and 0.3% that raw material gross weight is 3%
Al5Ge alloys, the component that stirring enables aluminum alloy to liquid are uniform；
4th step：680 DEG C of pouring temperature, 210 DEG C of cavity temperature, 2.4 meter per second of injection speed, injection ratio pressure 30MPa and
Aluminum alloy melt is cast into aluminium alloy under the conditions of 3 seconds dwell times, high-strength anti-corrosion die-casting aluminium alloy is obtained after cooling.
Comparative example 1
Pack alloy is made of the component of following mass percent：Si 10%, Mg 0.5%, Fe 0.4%, Ti
0.2%, remaining is Al and inevitable impurity, inevitable single content≤0.05% of impurity, total impurities≤
0.15%.The pressure casting method of pack alloy comprises the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold and Al10Ti alloys are raw material；
Second step：By aluminium ingot in 720 DEG C of heating fusings, the instant silicon, 0.5% for accounting for that raw material gross weight is 10% are added
Magnesium ingot and 1% Al20Fe alloys, stirring are fused into aluminum alloy melt；
3rd step：With account for raw material gross weight be 0.5% carbon trichloride refining slagging-off is carried out to aluminum alloy melt after, add
The Al10Ti alloys that raw material gross weight is 2% are accounted for, the component that stirring enables aluminum alloy to liquid is uniform；
4th step：690 DEG C of pouring temperature, 200 DEG C of cavity temperature, 2.3 meter per second of injection speed, injection ratio pressure 40MPa and
Aluminum alloy melt is cast into aluminium alloy under the conditions of 5 seconds dwell times.
Comparative example 2
Pack alloy is made of the component of following mass percent：Si 10%, Mg 0.5%, Fe 0.4%, Ti
0.2%, Ba 0.02%, Ge 0.01%, remaining is Al and inevitable impurity, the inevitable single content of impurity≤
0.05%, total impurities≤0.15%.The pressure casting method of pack alloy comprises the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold, Al10Ti alloys, Al5Ba alloys and Al5Ge alloys are raw material；
Second step：By aluminium ingot in 720 DEG C of heating fusings, the instant silicon, 0.5% for accounting for that raw material gross weight is 10% are added
Magnesium ingot and 1% Al20Fe alloys, stirring are fused into aluminum alloy melt；
3rd step：With account for raw material gross weight be 0.5% carbon trichloride refining slagging-off is carried out to aluminum alloy melt after, add
Al10Ti alloys, 0.4% Al5Ba alloys and the 0.2% Al5Ge alloys that raw material gross weight is 2% are accounted for, stirring closes aluminium
The component of golden liquid is uniform；
4th step：690 DEG C of pouring temperature, 200 DEG C of cavity temperature, 2.3 meter per second of injection speed, injection ratio pressure 40MPa and
Aluminum alloy melt is cast into aluminium alloy under the conditions of 5 seconds dwell times.
Comparative example 3
Pack alloy is made of the component of following mass percent：Si 10%, Mg 0.5%, Fe 0.4%, Ti
0.2%, Tc 0.02%, B 0.004%, remaining is Al and inevitable impurity, the inevitable single content of impurity≤
0.05%, total impurities≤0.15%.The pressure casting method of pack alloy comprises the following steps：
The first step：Aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe that purity is 99.7% is selected to close
Gold, Al10Ti alloys and Al5Tc1B alloys are raw material；
Second step：By aluminium ingot in 720 DEG C of heating fusings, the instant silicon, 0.5% for accounting for that raw material gross weight is 10% are added
Magnesium ingot and 1% Al20Fe alloys, stirring are fused into aluminum alloy melt；
3rd step：With account for raw material gross weight be 0.5% carbon trichloride refining slagging-off is carried out to aluminum alloy melt after, add
The Al10Ti alloys and 0.4% Al5Tc1B alloys that raw material gross weight is 2% are accounted for, the component that stirring enables aluminum alloy to liquid is uniform；
4th step：690 DEG C of pouring temperature, 200 DEG C of cavity temperature, 2.3 meter per second of injection speed, injection ratio pressure 40MPa and
Aluminum alloy melt is cast into aluminium alloy under the conditions of 5 seconds dwell times.
By National Standard of the People's Republic of China GB/T 228-1987《Metal tensile test method》, by embodiment 1-3 and
The pack alloy of comparative example 1-3 is processed into standard tensile specimen, and room temperature drawing is carried out on DNS200 type electronic tensile test machines
Stretch, rate of extension is 2 mm/mins, and the results are shown in Table 1.By National Standard of the People's Republic of China GB/10134-2011,
The pack alloy of embodiment 1-3 and comparative example 1-3 are processed into the cylindric sample of 20mm × 5mm, passed through before experiment
No. 2000 waterproof abrasive paper milled processeds, first prothyl is used as in the quality that sample is weighed by the use of acetone and washes of absolute alcohol and after drying
Amount, experiment corrosive medium use 3.5%NaCl solution, and pH value is controlled 7~7.5, and corrosion sample is hung in corrosive medium
24h is soaked, in chromic acid (the 200mg CrO of boiling3/L+10mg AgNO3) in cleaning 5min, then again with acetone absolute ethyl alcohol it is clear
Wash and after drying, weighed with assay balance, calculate corrosion rate：V=(W1-W2) × t/A, in formula, V is the corrosion speed of sample
Rate, W1 are the quality before sample corrodes, and W2 is the quality after sample corrosion, and A is the area of sample, and t is the time corroded,
Corrosion rate is as shown in table 1.
The tensile mechanical properties and corrosion rate of 1 embodiment of table and comparative example pack alloy
| Tensile strength/MPa | Elongation/% | Corrosion rate × 10-3/mg·cm-2·h-1 | |
| Embodiment 1 | 254.7 | 9.5 | 1.94 |
| Embodiment 2 | 266.3 | 8.7 | 1.81 |
| Embodiment 3 | 278.5 | 8.3 | 1.67 |
| Comparative example 1 | 190.8 | 2.4 | 2.61 |
| Comparative example 2 | 231.5 | 4.1 | 2.35 |
| Comparative example 3 | 218.2 | 3.7 | 2.18 |
See from table 1, the room temperature tensile intensity of the pack alloy of 1-3 of the embodiment of the present invention is more than 250MPa, elongation
More than 8%, corrosion rate is less than 2 × 10-3/mg·cm-2·h-1.The pack alloy of comparative example 1, due to no addition Tc, B,
Ba, Ge element carry out fine degenerate processing to rich Fe phases with Si phases, and the room temperature tensile intensity of pack alloy is 190.8MPa, is stretched
Long rate is 2.4%, and corrosion rate is 2.61 × 10-3/mg·cm-2·h-1.The pack alloy of comparative example 2, due to not adding
Tc, B element carry out rich Fe phases fine degenerate processing, and the room temperature tensile intensity of pack alloy is 231.5MPa, and elongation is
4.1%, corrosion rate is 2.35 × 10-3/mg·cm-2·h-1.The pack alloy of comparative example 3, due to no addition Ba, Ge
Element carries out Si phases fine degenerate processing, and the room temperature tensile intensity of pack alloy is 218.2MPa, elongation 3.7%,
Corrosion rate is 2.18 × 10-3/mg·cm-2·h-1.By comparing it can be seen that, pack alloy of the present invention by add Tc,
B, Ba, Ge element carry out fine degenerate processing to rich Fe phases with Si phases, are remarkably improved the intensity of pack alloy, plasticity and resistance to
Corrosive nature.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, are such as readily apparent that, such change should belong to for the professional person of this area
Within the scope of the claims in the present invention limit.
Claims (2)
- A kind of 1. high-strength anti-corrosion die-casting aluminium alloy, it is characterised in that：The pack alloy is by following mass percent into packet Into：Si 9.6~10.4%, Mg 0.4~0.6%, Fe 0.3~0.5%, Ti 0.1~0.3%, Tc 0.01~0.03%, B 0.002~0.006%, Ba 0.01~0.03%, Ge 0.005~0.015%, remaining is Al and inevitable impurity, its In, the mass ratio of Tc and B are 5:The mass ratio of 1, Ba and Ge is 2:1, inevitable single content≤0.05% of impurity, impurity Total amount≤0.15%.
- A kind of 2. pressure casting method of high-strength anti-corrosion die-casting aluminium alloy described in claim 1, it is characterised in that：The pressure casting method includes Following steps：The first step：Select purity be 99.7% aluminium ingot, 99.9% instant silicon, 99.95% magnesium ingot and Al20Fe alloys, Al10Ti alloys, Al5Tc1B alloys, Al5Ba alloys and Al5Ge alloys are raw material；Second step：By aluminium ingot 700~740 DEG C heating fusing, add account for raw material gross weight be 9.6~10.4% it is instant Silicon, 0.4~0.6% magnesium ingot and 0.5~1.5% Al20Fe alloys, stirring are fused into aluminum alloy melt；3rd step：After refining degasification slagging-off is carried out to aluminum alloy melt, the Al10Ti conjunctions for accounting for that raw material gross weight is 1~3% are added Gold, 0.2~0.6% Al5Tc1B alloys, 0.2~0.6% Al5Ba alloys and 0.1~0.3% Al5Ge alloys, stirring The component for enabling aluminum alloy to liquid is uniform；4th step：In 680~700 DEG C of pouring temperature, 190~210 DEG C of cavity temperature, 2.1~2.4 meter per second of injection speed, injection Than 30~50MPa of pressure and aluminum alloy melt is cast into aluminium alloy under the conditions of 3~8 seconds dwell times, high strength anti-corrosion is obtained after cooling Pack alloy.
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| CN111618476A (en) * | 2020-06-01 | 2020-09-04 | 南京航空航天大学 | High-strength aluminum-silicon alloy welding wire |
| CN112899532A (en) * | 2021-01-25 | 2021-06-04 | 广东工程职业技术学院 | High-toughness aluminum alloy regenerated from aluminum scrap and preparation method thereof |
| CN112921179A (en) * | 2021-01-25 | 2021-06-08 | 佛山市辰辉金属科技有限公司 | Recycling method and application of scraped car part aluminum alloy |
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| CN112921179A (en) * | 2021-01-25 | 2021-06-08 | 佛山市辰辉金属科技有限公司 | Recycling method and application of scraped car part aluminum alloy |
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Effective date of registration: 20231227 Address after: Building 1, No. 2, No. 139 Jinjia Village, Daqi Street, Beilun District, Ningbo City, Zhejiang Province, 315000 Patentee after: Ningbo Dekai Precision Machinery Manufacturing Co.,Ltd. Address before: 528244, No. 19-2 Shilongtan Industrial Zone, Beisha Bangang Village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee before: FOSHAN CHENHUI METAL PRODUCT FACTORY |