CN106591638A - New high pressure die casting aluminum alloy for high temperature and corrosive applications - Google Patents
New high pressure die casting aluminum alloy for high temperature and corrosive applications Download PDFInfo
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- CN106591638A CN106591638A CN201610880619.5A CN201610880619A CN106591638A CN 106591638 A CN106591638 A CN 106591638A CN 201610880619 A CN201610880619 A CN 201610880619A CN 106591638 A CN106591638 A CN 106591638A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 64
- 238000004512 die casting Methods 0.000 title claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 82
- 239000000956 alloy Substances 0.000 claims abstract description 75
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 74
- 238000000034 method Methods 0.000 claims abstract description 49
- 239000011777 magnesium Substances 0.000 claims abstract description 47
- 238000003483 aging Methods 0.000 claims abstract description 31
- 229910052802 copper Inorganic materials 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000010936 titanium Substances 0.000 claims abstract description 25
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 20
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 15
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 13
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims abstract description 13
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000010703 silicon Substances 0.000 claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 35
- 239000011572 manganese Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 16
- 229910052748 manganese Inorganic materials 0.000 claims description 13
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims description 10
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 abstract description 22
- 229910052726 zirconium Inorganic materials 0.000 abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 2
- 239000011701 zinc Substances 0.000 abstract description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 27
- 239000002244 precipitate Substances 0.000 description 20
- 238000003825 pressing Methods 0.000 description 16
- 230000007797 corrosion Effects 0.000 description 15
- 238000005260 corrosion Methods 0.000 description 15
- 230000032683 aging Effects 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 238000010791 quenching Methods 0.000 description 13
- 230000000171 quenching effect Effects 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 238000007711 solidification Methods 0.000 description 9
- 230000008023 solidification Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 7
- 230000035882 stress Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 238000007654 immersion Methods 0.000 description 5
- 229910019752 Mg2Si Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000004531 microgranule Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 229910018125 Al-Si Inorganic materials 0.000 description 3
- 229910018520 Al—Si Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 208000002352 blister Diseases 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910016343 Al2Cu Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000632 Alusil Inorganic materials 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 229910000846 In alloy Inorganic materials 0.000 description 1
- 229910019086 Mg-Cu Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 239000001996 bearing alloy Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical group 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011856 silicon-based particle Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Copper-free aluminum alloys suitable for high pressure die casting and capable of age-hardening under elevated temperatures. The alloy includes about 7-15 wt % silicon, about 0 to 0.6 wt % magnesium, about 0 to 1.0 wt % iron, about 0 to 1.0 wt % manganese, about 0 to 1.0 wt % zinc, about 0 to 0.1 wt % strontium, about 0 to 0.5 wt % titanium, about 0 to 0.5 wt % zirconium, about 0 to 0.5 wt % vanadium, about 0 to 0.5 wt % copper, and about 0 to 1.0 wt % nickel, with a balance of aluminum. Methods for making high pressure die castings and castings manufactured from the alloy.
Description
Technical field
Present invention relates in general to one kind is formulated for the low copper of Hpdc (HPDC) or without albronze, and its casting
Part, it can carry out age-hardening with the hole for reducing at elevated temperature, so as to have answering for especially auto industry
The excellent mechanical performance with.
Background technology
HPDC is a kind of economical and effective for commercial production of metals part and widely used method, and the metal parts is needed
Want accurate dimensional uniformity, low dimensional tolerance and wherein critically important glossy surface finish.Auto industry manufacturer shows
Have increasing need for produce with high tensile can and ductility combination near-net-shape aluminium parts, and HPDC provide use
In the most economical production method of extensive middle-size and small-size part.
In order to avoid the discontinuity of cast member, molten alloy is injected sufficiently quickly to in die cavity, so as to whole
Chamber was filled before any part in chamber starts solidification.Therefore, injection is carried out under high pressure, and is pressed in pressing mold at it
And when subsequently rapidly solidifying, motlten metal undergoes turbulent flow.Unfortunately, because the air for being melted alloy displacement is little sometimes
Between escape, so some of which is stranded and hole is produced.Foundry goods also drops comprising the gas vapor by organic die wall lubricant
Solution product produce hole, and hole can by solidification during contraction and produce.Hole, especially by being produced in HPDC techniques
Raw entrainment air or the hole of gas vapor induction, its major defect is, the foundry goods by made by aluminium alloy, generally with right
The ability of age-hardening response, it is impossible to effectively carry out artificial aging, that is to say, that it can not obtain height before artificial aging
Oversaturated hardening element (Mg or Cu in such as solution) is spent, because can not be applied to the tradition of Hpdc aluminium alloy
Solution process.The endoporus comprising gas or gas generating compounds in high pressure die castings, at elevated temperature, in conventional solution process
Period, expansion is there occurs, cause the formation in foundry goods upper surface sand holes.The presence of these sand holes not only affects the outward appearance of foundry goods,
Also dimensional stability is affected, and in some cases, it negatively affects the specific mechanical properties of HPDC parts.It is concrete and
Speech, aluminium alloy HPDC mo(u)lded pieces are not amenable to solution under high temperature (such as 500 DEG C) and process (T4), significantly reduce by complete
The probability of the precipitation-hardening of deep drawing T6 and/or T7 (equally combining to express with tempering T4 and T5) heat treatment.Similarly,
The hardly possible HPDC parts for finding the conventional process without air pocket.
Al-Si casting alloys (for example, alloy 319,356,390,360,380) in, the heat treatment after casting adds
Plus different alloyings hardening solute (including but not limited to Cu and Mg), realize reinforcing.The heat treatment of cast aluminium is related to such as timeliness
Mechanism described in hardening or precipitation strength.Heat treatment (heat treatment of traditional T6 and/or T7) generally includes three below step
At least one or combination：(1) solution below the relatively high temperature less than alloy melting point processes (being also defined as T4), generally
More than 8 hours or the longer time, to dissolve its alloying (solute) element and homogenize or change micro structure；(2) solution
After process, quick cooling, or the quenching in cold or heat liquid medium (such as water), so that solute element is maintained at supersaturation
Solid solution in；And (3) are by the way that alloy to be kept in the case where the medium temperature hardened by precipitating or strengthen is suitable to one section
The artificial aging (T5) of time.Solution processes (T4) and has three main purposes：(1) element of age-hardening will after a while be caused
Dissolving, solute concentration homogenizes in the spheroidizing of (2) undissolved compositionss, and (3) material.Quenching after the process of T4 solution
Solute element is maintained in oversaturated solid solution (SSS), and also generate the diffusion of raising precipitate and scattered sky
The supersaturation of position.In order that the maximum intensity of alloy, it is necessary to the precipitation of all hardening constituents during preventing from quenching.Timeliness (T5, nothing
By be natural or artificial aging) generate the controllable dispersion of reinforced deposition thing.
Along with T5 timeliness, generally there are the aging condition of three types, commonly referred to as underaging, peak value timeliness and mistake
Timeliness.In preageing or the primary stage of timeliness, the shearing precipitated form of Guinier-Preston (GP) Qu Hexi, and
Foundry goods is considered as underaging.Under these conditions, the mechanical performance of foundry goods, such as material hardness and yield strength, generally
It is very low.Timeliness further relates to make mechanical performance (such as hardness and surrender at the temperature of the time or higher for increasing at a given temperature
Intensity) increase to maximum horizontal for realizing the sediment structure of peak value timeliness/stiffness conditions.Further timeliness is reduced firmly
Degree/yield strength, and the inconsistent transformation of the roughening due to precipitate and its crystallography, foundry goods becomes overaging.
Inner pore is inevitably included in view of traditional HPDC aluminium parts, artificial aging (T5) becomes machinery needed for realization
Performance and do not cause blistering extremely important step.Occurred by reinforcing caused by timeliness, because the hardening solute for retaining is deposited
Be supersaturation solid solution precipitate in, the precipitate is evenly dispersed in crystal grain very much, and increased foundry goods
The ability of the deformation that opposing sliding and Plastic Flow are caused.When Ageing Treatment causes at least one of these thin precipitate type shape
When into critical dispersion, the hardening or reinforcing of maximum can occur.
Additionally, in traditional HPDC techniques, prior to the pressing mold demoulding and quenching, mo(u)lded piece Jing often slowly cools to low temperature,
For example, less than 200 DEG C.The probability of subsequent timeliness is which greatly reduces, because hardening solute dissolubility is with hardening heat
Reduction and be substantially reduced.As a result, it is remaining hardening solute (such as Cu and Mg, in aluminum matrix it is available for
Age-hardening afterwards) it is very limited amount of.Although alloy can include the Cu of nominal compositions 3%～4%, most of Cu and other yuan
Element has combined to form intermetallic phase.Not through solution process, intermetallic phase containing Cu does not result in the age-hardening of material.Cause
This, adds Cu and improves and in terms of the quality assurance two all without effect in performance in the HPDC alloys used in current production.
Typical Al-Si base HPDC alloys are comprising about 3%～4% Cu.It is commonly accepted that copper (Cu) is closed in aluminum
The intensity and hardness of golden foundry goods, heat treatment or non-heat treatment and room temperature and elevated to safeguard that have in temperature all alloyings molten
Single maximum effect of matter/element.Known Cu can put forward heavy alloyed processing characteristics by increasing matrix solidity so as to more hold
It is also easy to produce the fragment and tiny processed finished products of little cutting.Never from the point of view of benefit, Cu increased the solidification range of alloy and subtract
Little feed ability, causes the high likelihood of shrinkage porosity.Ground is become apparent from, the corrosion resistance of aluminium parts is typically reduced；With
And under some alloys and tempering, increased stress corrosion susceptibility.For example, it has been reported that there is high Cu contents (i.e., about
More than 3%-4%) aluminium alloy run into unacceptable corrosion rate, especially in saline environment.Typical Hpdc
(HPDC) aluminium alloy, such as A380 or 383, for variator and engine part, including the Cu of 2%-4%.It is contemplated that this
The etching problem of a little alloys becomes readily apparent from, when especially needing longer guarantee period and Geng Gao vehicle mileages.
Aluminium alloy has obtained being developed for solving some known problems.For example, aluminium alloy A380 typically have with
The age hardening alloy of lower compositionss (in units of weight %)：9Si、3.1Cu、0.86Fe、0.53Zn、0.16Mn、0.11Ni
With 0.1Mg (Lumley, R.N. etc., " thermal characteristicss of heat-treated aluminum high pressure die castings " (" Thermal characteristics
Of heat-treated aluminum high-pressure die-castings "), Scripta Materialia 58
(2008) 1006-1009, complete disclosure is incorporated herein by this reference).It is known that Cu phases, such as Al2Cu precipitate
Phase, it is critically important in the benefit to the thermal conductance realized artificial aging and improve mo(u)lded piece.However, foundry goods bear it is relatively low
Corrosion resistance, the high likelihood of casting flaw and due to high material cost caused by Cu.
It is known that drop low content of Cu improves the corrosion resistance of aluminum alloy materials.However, Cu is considered as the casting of HPDC aluminum
The compositionss that must be hardened in part.In aforementioned operation, some in the present inventor recommend 0.5% to 1.5% (with weight
Gauge) relatively low content of Cu, it is (open see U.S. Patent Application No. No.12/827564 that it depends on foundry goods and heat treatment condition
Numbers 20120000578, complete disclosure is incorporated herein by this reference).However, in the presence of Cu in casting solution, solidification
Afterwards, for the reservation of acceptable mechanical property (specifically, hardness/yield strength) is considered as complete.
The alloy (for example, A356) of copper is substantially free of as is generally known in the art, but is commonly used for the sand except HPDC
Mold casting and/or semipermanent model casting technique, and be subjected to after preparation lacking in terms of mechanical performance (for example, tensile strength)
Fall into.
Lin (U.S. Patent Application No. 11/031,095) discloses the aluminium alloy with the copper percentage ratio for reducing；So
And Lin has taught the importance of the presence for hardening process of some copper.Additionally, Lin alloy formulas and foundry goods contain low weight
The Si of percentage ratio to avoid casting condition in fragility Al-Si congruent melting networks.The generation that aims at of Lin is suitable to thixotropic forming
Aluminium alloy, comprising low-pressure molding with produce specific microstructure and avoid solution heat treatment combination cast and forge feature
Molding process.The alloy of Lin is not suitable for HPDC methods.
Obviously, there is a need in the art for one kind be suitable to HPDC and stand age-hardening, while not detracting from casting group
The corrosion resistance of part or the aluminium alloy of mechanical performance.
The content of the invention
Therefore, the present invention provides the porosity being suitable to reduce compared to known HPDC aluminium alloys and carries out Hpdc and liter
The aluminium alloy for being substantially free of Cu or low Cu of the age-hardening under high-temperature.Foundry goods is for room temperature and raises temperature configuration application all
Show enhanced mechanical performance.
Aluminium alloy of the invention is suitable to Hpdc technique and can carry out age-hardening, so as in a liter high-temperature
Under age-hardening after excellent mechanical performance is provided.The embodiment of aluminium alloy includes by weight：The silicon of about 7 to about 15%
(Si)；The magnesium (Mg) of about 0 to about 0.6%；The ferrum (Fe) of about 0 to about 1%；The manganese (Mn) of about 0 to about 1%；About 0 to about 1.0%
Zinc (Zn)；The strontium (Sr) of about 0 to about 0.1 percentage by weight；The titanium (Ti) of about 0 to about 0.5 percentage by weight；And about 0 to about
0.5% zirconium (Zr) and at least about 78% aluminum.Alloy may further include the vanadium (V) of about 0 to about 0.5%.According to this
Bright alloy can also include：The copper (Cu) of about 0 to about 0.5%；And the nickel (Ni) of about 0 to about 1%.Combination of the above thing scope can
To be adjusted based on performance requirement.
Other embodiments are directed to the HPDC products cast by aluminium alloy of the invention.Aluminium alloy is prepared so that alloy
Performance is less than annual about 0.1 millimeter corrosivity.Aluminium alloy is prepared so that processing age-hardening in as cast condition, by being tempered T5
And at 200 DEG C soak 200 hours and at 200 DEG C test alloy performance greater than about the yield strength of 150MPa, be higher than
The ultimate tensile strength of about 190MPa and greater than about 1.8% strain.Alloy can be needed for other aluminium alloys be generally less than
It is interior during period to receive solution process.These embodiments will not suffer from blistering, and be possible to undergo effectively tempering or T6/T7
Age-hardening is processed.For cast product embodiment undergo age hardened temper process one or more steps when
Possess superior mechanical performance.
Other embodiments are for for by the method for the HPDC article of manufacture of aluminium alloy of the invention.Methods described
Including provide according to an embodiment of the invention molten aluminium alloy, molten aluminium alloy is injected in pressing mold under high pressure, solidified
Alloy in pressing mold is forming foundry goods, the foundry goods in pressing mold be cooled to into hardening heat, foundry goods is quenched in quenching solution
Fire and make foundry goods undergo once or more age-hardening process.Alloyage is so that foundry goods is with less than annual about 0.1 milli
The speed corrosion of rice and immersion 200 hours and it is kept above about 150MPa's after testing at 200 DEG C at 200 DEG C at it
The ultimate tensile strength of yield strength, greater than about 190MPa and greater than about 1.8% stress.
These and extra aspect and embodiment by view of described below detailed description and schema and become apparent from
Understanding.
Description of the drawings
The described in detail below of specific embodiment can get the best understanding when in conjunction with the following drawings：
Fig. 1 shows institute's calculated diagram of cast aluminium alloy gold known in the art (A380HPDC alloys), and it shows phase transformation
For the function of Cu contents.
Fig. 2 shows that the porosity of the work at present for showing related to copper content according to a particular embodiment of the invention increases
Plus chart.
Fig. 3 shows the Jing for comparing T5HPDC alloys A380, A360 and Chemical composition that according to an embodiment of the invention
Data are tested, it compares the tensile property and corrosion resistance and corrosion conductivity for sampling this.
Fig. 4 shows to compare and is cast by known alloy A360, A380 and a particular alloy embodiment of the invention
The as cast condition T5 timeliness made and the tabulation empirical data of the tensile property of immersion HPDC samples.
Fig. 5 shows and compares by known alloy A360, A380 and another particular alloy embodiment casting of the invention
The as cast condition T5 timeliness made and the tabulation empirical data of the tensile property of immersion HPDC samples.
Specific embodiment
Embodiments of the invention relate generally to the aluminium alloy for being substantially free of Cu or low Cu, and it is formulated into offer can
Age-hardening is carried out at elevated temperature and shows the HPDC cast assemblies of superior mechanical performance and the porosity for reducing.It is different
In known in the art based on aluminum alloy-steel casting containing Cu, the foundry goods of the present invention can carry out the temper aging hardening of all scopes
Process.
As used herein, " foundry goods " generally refers to the aluminium alloy high pressure pressure being solidified to form by aluminum alloy composition
Foundry goods.Thus, Technology for Heating Processing that herein may be after Hpdc technique and/or solidification (is either cooled down, quenched
Fire, timeliness or other) any stage during be related to foundry goods.Additionally, foundry goods can be included by embodiments of the invention shape
Into any part, part, product.
Additionally, as used herein, " mechanical performance " and its relevant phrases generally refer to measure metal (such as aluminum and its conjunction
Gold) performance intensity how under loads, hardness, toughness, elasticity, plasticity, in fragility and ductility and ductile extremely
Few one and/or its any combinations.Mechanical property is usually the type of the power or stress that must endure as according to metal and how
Resist the power to describe.
As used herein, " intensity " refers in yield strength, ultimate strength, tensile strength, fatigue strength and impact strength
At least one and/or any combinations.Intensity generally refers to enable the performance of metal resistance to deformation under loads.Surrender is strong
Degree generally refers to the stress that material starts plastic deformation.In engineering, yield strength can be defined as scheduled volume (example
Such as, stress when permanent deformation about 0.2%) occurs.Ultimate strength generally refers to the maximum strain that metal can bear.Tension
Intensity generally refers to the measurement of the resistance when being placed in tensile load to being opened.Fatigue strength generally refers to metal and supports
The ability for the resisting various fast-changing stress and size of the alternate stress for passing through regulation loop number is expressing.Impact is strong
Degree generally refers to the ability of the load that metal opposing applies suddenly.Generally, yield strength is higher, and other intensity are also higher.
As used herein, " hardness " generally refers to the performance that metal resists residual indentation.Hardness is typically with intensity into just
Than.Therefore, the metal with high intensity also generally has high rigidity.
The known aluminum alloy composition for being cured to form foundry goods includes many elements, such as, but not limited to, aluminum (A1), silicon
(Si), magnesium (Mg), copper (Cu), ferrum (Fe), manganese (Mn), zinc (Zn), nickel (Ni), titanium (Ti), strontium (Sr) etc..Define aluminum alloy combination
These elements of thing and its corresponding concentration can be with the mechanical performances of its foundry goods for being formed of appreciable impact.More specifically, some
Element can be referred to as hardening solute.These hardening solutes can be in the solidification of foundry goods, cooling, quenching and timeliness and heat treatment
Mutually and/or engage and/or combine with other elements during technique.Timeliness is generally used for strengthening foundry goods.Although can be using use
In the various techniques of timeliness, but due to due to mentioned above, typically only some are applicable for aluminium alloy high pressure extrusion process
And/or fully effectively.For aluminium alloy castings known to HPDC parts typically has been restricted to be tempered T5 process timeliness (natural or people
Work).Timeliness strengthens foundry goods by promoting the precipitation for hardening solute of aluminum alloy composition.
Artificial aging (T5) is heated to foundry goods to a liter high-temperature, usually in the middle of temperature, by hardening the heavy of solute
Form sediment, the temperature provides one time that be enough to strengthen casting.Because precipitation is dynamic process, therefore relative to during casting pair
The reinforcing reaction of effect, the respective concentration (supersaturation) for hardening solute that can be used to precipitate is obvious.Therefore, the dense of solute is hardened
Degree and its availability for precipitation have interfered significantly on the degree that foundry goods is reinforced during timeliness.If hard before timeliness
Change solute be prevented from or be substantially prevented themselves and/or with the bonding between other elements, then it is hard during timeliness
Changing solute may precipitate to strengthen foundry goods.
In order to before timeliness prevent or at least substantially prevent, hardening solute themselves and/or with aluminium alloy group
Bonding between other elements of compound, and the availability of hardening solute is thus kept, foundry goods is cooled in pressing mold to be quenched
Fiery temperature and immediately it is quenched.For the ease of foundry goods is cooled to into hardening heat, in foundry goods from the pressing mold for quenching
In remove before, embodiment potentially includes one or more regions specified for selectively heating and/or cooling down in foundry goods.
Further, precipitate to increase during timeliness, and thus strengthen the mechanical performance of foundry goods, one or more
Specific hardening solute is typically integrated in aluminum alloy composition.Magnesium (Mg), copper (Cu) and silicon (Si) are used as in aluminium alloy
Hardening solute is particularly effective and even required, and traditionally this has been in the art received.Mg can be with
Si is combined to form Mg/Si precipitate, such as：β ", β ' and balance Mg2Si phases.The type of precipitate, size and concentration are logical
It is often dependant on the aging condition of the present invention and the compositionss of these aluminium alloys.For example, underaging be easily formed can shearing β "
Precipitate, however peak value timeliness and overaging be usually formed can not shearing β ' and balance Mg2Si phases.Work as aged aluminum alloy
When, Si can individually form Si precipitate.But Si precipitate is usual not as Mg/Si precipitate so has in reinforced aluminium alloy
Effect.Further, Cu can be combined to form various metastable precipitated phases with aluminum (Al), such as：In Al-Si-Mg-Cu alloys
In θ ' and θ, these precipitate are very effective in reinforcing.
The more effective hardening solute for increasing concentration can be incorporated in aluminum alloy composition to increase them in timeliness
When the availability that precipitates, this is also widely accepted.According to the explanation of traditional aluminum alloy composition of HPDC, with corresponding group
The generally combined maximum Mg concentration of the weight meter of compound is less than 0.1%.But in industrial practice, this aluminum alloy composition
In Mg concentration tend to further below 0.1%.Therefore, these compositionss typically have and form the ability of Mg/Si precipitate simultaneously
And, similarly even during T5 timeliness, produced by the minimum reinforcing of the foundry goods of Mg/Si precipitate.In fact, generally receiving
Be that the reinforcing of foundry goods unique feasible in this case is produced by the formation of Al/Cu precipitate.Therefore, in HPDC operations
Cu has been considered to necessary hardening solute in alusil alloy.
However, when the age hardened temper wanted to HPDC foundry goods is processed, hardening effect of Cu and contribution may
It is surprisingly limited.Although typical HPDC aluminium alloys (such as A380,380 or 383) contains 3 in nominal compositions
～4% Cu, but in the as cast condition aluminum matrix of follow-up timeliness remaining actual Cu solutes actually significantly decrease.Such as
Shown in Fig. 1, or even the Cu contents when foundry goods is in about 200 DEG C of quenchings in aluminum matrix only about 0.006%.During curing
Most Cu and Fe form other elements bondings of intermetallic phase, if these compositionss/be partly not subjected to high temperature are molten
Then these elements just do not have aging response for solution process.In this case, the intermetallic phase containing Cu is sent out in strain hardening
The effect waved is similar to other the second phase microgranules (as Si).Cu is hardened to accelerated ag(e)ing in traditional high pressure die casting part
Contribution it is actually negligible.Therefore, with regard to Cu as hardening solute importance convention conversely, the present inventor
It was found that, if compositionss are the Cu being additionally formed in specific parameter area, it is possible to go from alloy basic divided by realizing
The upper aluminium alloy without Cu, it is such to provide bigger decay resistance for HPDC foundry goods without Cu aluminium alloys and some are excellent
Mechanical performance more.In addition, the benefit of some its contributions can be kept using a small amount of Cu in the alloy.It is further noted that
It is that Mg has high diffusivity rate in Al-Si alloys.This alloy only needs to spread Mg and Si microgranules in due to processing in solution,
Therefore the time that solution is processed just can shorten.Low Cu discussed herein and the embodiment without Cu are provided and shorten process time
Advantage.In addition this allows the age-hardening of effective temper or T6/T7 to process.
According to one embodiment of present invention, Fig. 2 describes the volume fraction of porosity compared with Cu levels in alloy
Chart.In order to compare some data points that also show the work from prior art, as illustrated, when Cu is in 0.5% He
Porosity is significantly increased when between 0.8% (percentage by weight).Within the range, the volume fraction of porosity is from about 0.4%
Increase to about 0.6%.More than the scope, porosity is maintained at about 0.7%.Below the scope, porosity is significantly increased,
But still in desired scope.The porosity level reduced when Cu levels are in desired scope of the invention is present,
From about 0% to about 0.5% (percentage by weight), the raising performance of alloy is which ensure that.
Therefore, An embodiment provides one kind is suitable to HPDC techniques and can carry out back at elevated temperature
The aluminium alloy of fiery age-hardening.The alloy includes the aluminum (Al) of at least about 78% (percentage by weight)；About 7% to about 15% (weight
Amount percentage ratio) silicon (Si)；The magnesium (Mg) of about 0% to about 0.6% (percentage by weight)；About 0% to about 1% (percentage by weight)
Ferrum (Fe)；The manganese (Mn) of about 0% to about 1% (percentage by weight)；The zinc (Zn) of about 0% to about 1.0% (percentage by weight)；
The strontium (Sr) of about 0% to about 0.1% (percentage by weight)；The titanium (Ti) of about 0% to about 0.5% (percentage by weight)；And about
The zirconium (Zr) of 0% to about 0.5% (percentage by weight)；Mg and Si are effectively to harden solute.Mg is combined to form Mg/Si with Si
Precipitate, such as：β ", β ' and balance Mg2Si phases.Actual type of precipitation, quantity and size depend on aging condition and
The Mg retained in substrate after especially casting and the content of Si.Compared with Cu, the dissolubility of Si and Mg in aluminum matrix be compared with
High.The diffusibility of Mg and Si in aluminum matrix is also above Cu.Increasing Si can help subtract close to eutectic composition (about 12%)
The Castability and quality of little solidification range and therefore increase foundry goods.Mg and Si are both lighter than Cu and imitate with more cost
Benefit.
It is desirable that a kind of aluminium alloy without Cu should be after solidification micro structure in produce similar amt the second phase
Microgranule.Described alloy should also include ferrum (Fe) to avoid the welding of pressing mold.If however, do not added with the amount of appropriate ratio
Manganese (Mn), then Fe can be readily formed phase between undesirable needle-like metal.
According to other embodiments, aluminium alloy is further included：The vanadium (V) of about 0% to about 0.5% (percentage by weight).Root
It is a kind of to be suitable to HPDC and be capable of the aluminium alloy of age-hardening mainly to include according to very specific embodiment：About 13% (weight percent
Than) silicon (Si)；The magnesium (Mg) of about 0.4% (percentage by weight)；The ferrum (Fe) of about 0.4% (percentage by weight)；About 0.8%
The manganese (Mn) of (percentage by weight)；The zinc (Zn) of about 0.5% (percentage by weight)；The strontium of about 0.04% (percentage by weight)
(Sr)；The titanium (Ti) of about 0.3% (percentage by weight)；The zirconium (Zr) of about 0.15% (percentage by weight)；And the aluminum of surplus
(Al).It is a kind of to be suitable to HPDC and be capable of the aluminium alloy of age-hardening mainly to include according to another unusual specific embodiment：About
The silicon (Si) of 8.5% (percentage by weight)；The magnesium (Mg) of about 0.4% (percentage by weight)；The ferrum of about 0.4% (percentage by weight)
(Fe)；The manganese (Mn) of about 0.5% (percentage by weight)；The zinc (Zn) of about 0.5% (percentage by weight)；About 0.04% (weight hundred
Point ratio) strontium (Sr)；The titanium (Ti) of about 0.3% (percentage by weight)；The zirconium (Zr) of about 0.3% (percentage by weight)；About 0.3%
The vanadium (V) of (percentage by weight)；And the aluminum (Al) of surplus.According to another unusual specific embodiment, one kind is suitable to HPDC
And be capable of the aluminium alloy of age-hardening and mainly include：The copper (Cu) of about 0% to about 0.5% (percentage by weight)；And about 0% to
The nickel (Ni) of about 1% (percentage by weight).
It is a kind of to be suitable to HPDC and be capable of the aluminium alloy of age-hardening mainly to wrap according to another unusual specific embodiment
Include：The aluminum (A1) of at least about 78% to about 90% (percentage by weight)；The silicon (Si) of about 7% to about 15% (percentage by weight)；
The magnesium (Mg) of about 0% to about 0.6% (percentage by weight)；The ferrum (Fe) of about 0% to about 1% (percentage by weight)；About 0% to about
The manganese (Mn) of 1% (percentage by weight)；The zinc (Zn) of about 0% to about 1.0% (percentage by weight)；About 0% to about 0.1% (weight
Amount percentage ratio) strontium (Sr)；The titanium (Ti) of about 0% to about 0.5% (percentage by weight)；About 0% to about 0.5% (weight percent
Than) zirconium (Zr)；The vanadium (V) of about 0% to about 0.5% (percentage by weight)；The copper of about 0% to about 0.5% (percentage by weight)
(Cu)；And the nickel (Ni) of about 0% to about 1% (percentage by weight).
Fig. 3 shows the amount of calculation scope and some tradition of the second phase chemicals according to an exemplary embodiment of the present invention
Comparison between the amount of calculation scope of the second phase chemicals of HPDC alloys, traditional HPDC alloys include A380, the and of alloy 383
Alloy 360, and two kinds of proprietary alloys, p011783 and p020385.As can be seen from the table, the array of microgranule is in the present invention
Unique, and most of microgranules (including copper) keep relatively low amount.The usage amount of other microgranules (including Mn and Ni) is more than
Usage amount in other alloys described.Equally, although the Sn used in most of other alloys, but do not wrap in invention
Contain.Additionally, Ti, Sr and Zr are not all used in alloy A380,383 or 360, but by present invention expression.Finally, except new group
Compound, does not include microgranule vanadium (V) in other any alloys.Embodiments of the invention can be used in high temperature and corrosive applications, with
And with the mechanical performance for improving.New alloy realize mechanicalness under good castability, the special high temperature of high mechanicalness with
And the best of breed of corrosion resistance.Additionally, new alloy reduces alloy density, material and manufacturing cost, improve on the whole
The integrity and performance of HPDC aluminium castings.New alloy reduces aluminium casting product development cycle and Time To Market.
With reference to some specific embodiments, some elements used herein are that institute is uncommon in aluminium alloy.Aluminium alloy
In improve ductility and resistance to die welding using strontium.Known strontium can be modified to aluminum-silicon eutectic, but it is very low
Content under realize.However, it is expected that avoiding using higher addition, because they are relevant with foundry goods porosity.Equally, titanium
It is the element that aluminium alloy can be added as grain refiner and strength-to-weight ratio and corrosion resistance is improved.Comprising titanium it is dense
Degree is higher than the concentration needed for crystal grain refinement, to reduce tearing tendency and improve high-temperature behavior.Zirconium is used in the alloy, mainly because
For its corrosion resistance and high-temperature behavior.It is that zirconium adds to alloy to form precipitate between the fine metal for suppressing to recover and recrystallize
Another impact.Finally, the corrosion resistance of vanadium is it is well known that it can use used as stabilizers in aluminium alloy.Also find
It significantly improves other performance, the intensity of such as jet engine and fuselage.
The key benefit that alloy of the present invention is provided be eliminate or greatly reduce it is well known in the prior art with Cu content phases
The etching problem of pass, and do not damage the intensity of HPDC cast articles.In alloy not the low use of cupric or copper content in very great Cheng
This problem is solved on degree.Fig. 4 and Fig. 5 further illustrate this point.Fig. 4 is closed from known HPDC A380 and A360
The golden particular alloy with according to embodiments of the present invention 1, experiment test and is comparing HPDC foundry goods samples, T5 samples and T5 and leaching
The tabulation of the data generated in bubble sample.For T5 data, foundry goods is through T5 Ageing Treatments.Purpose to compare all shows
Compositionss, the tensile property of foundry goods and etching conductive data.Fig. 5 is from known HPDC A380 and A360 alloys and basis
The particular alloy of the embodiment of the present invention 2, experiment test and compare HPDC foundry goods samples, T5 samples and T5 and immersion sample in
The tabulation of the data of generation.Check data display the two embodiments 1 and 2 not cupric, its corrosion resistance be better than by A380 and
The existing HPDC alloys of A360 alloy instantiateds.The degree of corrosion of estimated certain embodiments of the invention less than annual about 0.1 millimeter, or
Every year between about 0.09 millimeter and 0.07 millimeter.Additionally, comparing with A360 with exemplary HPDC alloys A380, embodiment 1 and 2 has
There are preferably casting pull resistance, more preferable timeliness reactivity, and there is higher tensile strength after T5 heat treatments.Additionally,
As described, T5 samples immersion 200 hours and after testing at 200 DEG C at 200 DEG C, the performance of this formula better than A380 and
A360 alloys.Each in all samples has the greater than about yield strength of 150MPa, and the greater than about maximum of 190MPa resists
Tensile strength and greater than about 1.8% strain.It should be noted that alloy of the invention is also slightly light, there is provided extra cost
Benefit.
According to another embodiment, there is provided the aluminium alloy that copper is substantially free of by made by disclosing according to the present invention is made
HPDC cast articles.Different from traditional copper-bearing alloy, cupric or dilute copper alloy can not undergo the very short time (such as 10
Minute) process of T4 solution, without causing blistering problem, process so as to produce effectively tempering or T6/T7 age-hardenings.With
Cu is compared, and Mg has high diffusibility, and therefore the shorter solution process time of needs in Al-Si alloys.Due to this
Without Cu or the copper containing extremely low level in bright, so during solution process, only Mg and Si microgranules need dissolving.Therefore, have
The present invention for having the copper of the Mg and Si and low concentration of higher concentration can carry out the solution of short period and process.Concrete real
In applying example, cast article can carry out solution process under about 500 DEG C for the treatment of temperature.According to the present invention, during solution process,
Mg2The dissolution of Si microgranules can 25 minutes at 450 DEG C in complete, even for the maximum particle diameter of 10um.Typically for HPDC
Part, typical Mg2Si particle diameters are less than 5um, even if in thicker part, the cylinder cover area of such as engine cylinder-body.
In one embodiment of the present of invention, the cast product of disclosed alloy can carry out the solution of 5 minute short time and process.Casting system
Product can show including it is at least one or more of it is insoluble solidification and/or depositing particles micro structure, the microgranule have be selected from
At least one alloy element in the group of Al, Si, Mg, Fe, Mn, Zn, Sr, Ti, Zr, V, Cu, Ni composition.
According to other embodiments, there is provided a kind of HPDC manufacturing process, which provide that to be substantially free of copper or low copper molten
Molten aluminum alloy, and be casted under high pressure in pressing mold.Alloy solidifies in pressing mold, to form foundry goods, and makes the casting in pressing mold
Part is cooled to required hardening heat, and the hardening heat is generally empirically determined.Foundry goods is removed from pressing mold and in quenching solution
Middle quenching.The one or more steps of age hardened temper process can be carried out to foundry goods.Foundry goods can also be carried out about 5 minutes
To the solution heat treatment of about 25 minutes.After foundry goods quenching and carrying out at least one age-hardening before processing in foundry goods carries out this
Process.Alternately, formed in foundry goods and carry out the solids treatment of this short time immediately after taking out from pressing mold, while continuing
Heating foundry goods reduces the cost for reheating to save energy.
According to very specific embodiment, a kind of method of manufacture aluminium alloy high pressure die castings includes：There is provided molten aluminum to close
Gold, it is mainly by following elementary composition：The aluminum (Al) of at least about 78 to 90 percentage by weights；About 7 to about 15 percentage by weights
Silicon (Si)；The magnesium (Mg) of about 0 to about 0.6 percentage by weight；The ferrum (Fe) of about 0 to about 1 percentage by weight；About 0 to about 1 weight hundred
Divide the manganese (Mn) of ratio；The zinc (Zn) of about 0 to about 1.0 percentage by weight；The strontium (Sr) of about 0 to about 0.1 percentage by weight；About 0 to
The titanium (Ti) of about 0.5 percentage by weight；The zirconium (Zr) of about 0 to about 0.5 percentage by weight, the vanadium of about 0 to about 0.5 percentage by weight
(V), the copper (Cu) of about 0 to about 0.5 percentage by weight；And about 0 to about 1 percentage by weight nickel (Ni)；At high temperature will be molten
Molten aluminum alloy is casted in pressing mold；Alloy in pressing mold is cured to form into foundry goods；Make foundry goods that quenching temperature is cooled in pressing mold
Degree；Foundry goods is quenched in quenching solution；And T5 age-hardening process is carried out to foundry goods.
It should be noted that used herein as " substantially ", " normally " and " typically " this kind of term is not intended to
Limit the scope of required embodiment or imply that some features are for the structure or function of embodiment required for protection
It is key, necessary or even important.Conversely, these terms are only used for showing the particular aspects of embodiment or for strong
Adjust and may use in specific embodiment the alternatively or additionally feature for being likely to not use.
In order to describe and limiting the purpose of the embodiment of the present invention, it is noted that the term " substantially " that utilizes herein,
" significantly " express possibility and be attributed to the probabilistic of any Quantitative Comparison, value, measurement result or other expressions with " about "
Intrinsic degree.Also illustrate that quantificational expression can be with given ginseng using term " substantially ", " significantly " and " about " herein
Examine the degree that basic function that is variant but being not result in present subject matter changes.
Described embodiments of the invention in detail, and with reference to its specific embodiment, it will be apparent that without departing substantially from
Modifications and variations can be made in the case of the scope of the embodiment defined in appended claims.Although more specifically, herein
In think embodiments of the invention some aspect be preferred or especially advantageous, it is conceivable that the reality of the present invention
Apply example and be not necessarily limited to these preferred aspects.
Claims (10)
1. a kind of aluminium alloy for being suitable to Hpdc and being capable of age-hardening at elevated temperature, the alloy includes：
The aluminum (Al) of at least about 78 percentage by weights；
The silicon (Si) of about 7 to about 15 percentage by weights；
The magnesium (Mg) of about 0 to about 0.6 percentage by weight；
The ferrum (Fe) of about 0 to about 1 percentage by weight；
The manganese (Mn) of about 0 to about 1 percentage by weight；
The zinc (Zn) of about 0 to about 1.0 percentage by weight；
The strontium (Sr) of about 0 to about 0.1 percentage by weight；
The titanium (Ti) of about 0 to about 0.5 percentage by weight；And
The zirconium (Zr) of about 0 to about 0.5 percentage by weight.
2. alloy according to claim 1, it is further included：
The vanadium (V) of about 0 to about 0.5 percentage by weight.
3. aluminium alloy according to claim 1, the alloy includes：
The silicon (Si) of about 13 percentage by weights；
The magnesium (Mg) of about 0.4 percentage by weight；
The ferrum (Fe) of about 0.4 percentage by weight；
The manganese (Mn) of about 0.8 percentage by weight；
The zinc (Zn) of about 0.5 percentage by weight；
The strontium (Sr) of about 0.04 percentage by weight；
The titanium (Ti) of about 0.3 percentage by weight；
The zirconium (Zr) of about 0.15 percentage by weight；And
The aluminum (Al) of surplus.
4. aluminium alloy according to claim 2, the alloy includes：
The silicon (Si) of about 8.5 percentage by weights；
The magnesium (Mg) of about 0.4 percentage by weight；
The ferrum (Fe) of about 0.4 percentage by weight；
The manganese (Mn) of about 0.5 percentage by weight；
The zinc (Zn) of about 0.5 percentage by weight；
The strontium (Sr) of about 0.04 percentage by weight；
The titanium (Ti) of about 0.3 percentage by weight；
The zirconium (Zr) of about 0.3 percentage by weight；
The vanadium (V) of about 0.3 percentage by weight；And
The aluminum (Al) of surplus.
5. alloy according to claim 1, it is further included：
The copper (Cu) of about 0 to about 0.5 percentage by weight；And
The nickel (Ni) of about 0 to about 1 percentage by weight.
6. a kind of high pressure die castings, it is cast by aluminium alloy according to claim 1.
7. foundry goods according to claim 6, it undergoes at elevated temperature age-hardening.
8. foundry goods according to claim 6, wherein the foundry goods undergoes solution heat treatment up to about 5 minutes to about 25 minutes
Time.
9. foundry goods according to claim 7, wherein age hardening conditions include effectively tempering, T6 or T7 process, and wherein
The foundry goods carries out solution process at a temperature of 500 DEG C or so.
10. foundry goods according to claim 7, wherein processing age-hardening or by tempering in as cast condition, by being tempered T5
The foundry goods that T5 processes age-hardening and subsequently soaks 200 hours at 200 DEG C and test at 200 DEG C is showed greater than about
The ultimate tensile strength of the yield strength of 150MPa, greater than about 190MPa and greater than about 1.8% strain.
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| US14/886,263 US20170107599A1 (en) | 2015-10-19 | 2015-10-19 | New high pressure die casting aluminum alloy for high temperature and corrosive applications |
| US14/886263 | 2015-10-19 |
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| CN107400792A (en) * | 2017-06-27 | 2017-11-28 | 太仓市雅兴精密冲压件厂 | A kind of preparation method of die casting impact resistance alloy |
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| CN111560543A (en) * | 2020-04-21 | 2020-08-21 | 北京联合大学 | Aluminum-silicon-based precision casting material and preparation method thereof |
| CN111560543B (en) * | 2020-04-21 | 2021-09-17 | 北京联合大学 | Aluminum-silicon-based precision casting material and preparation method thereof |
| WO2023231352A1 (en) * | 2022-05-30 | 2023-12-07 | 中兴通讯股份有限公司 | High-thermal-conductivity die-cast aluminum alloy product and preparation method therefor, and radiator |
| CN115198150A (en) * | 2022-06-24 | 2022-10-18 | 一汽解放汽车有限公司 | Aluminum-silicon alloy and preparation method and application thereof |
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| CN116334456A (en) * | 2022-10-31 | 2023-06-27 | 小米汽车科技有限公司 | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102016118729B4 (en) | 2024-07-11 |
| DE102016118729A1 (en) | 2017-04-20 |
| US20170107599A1 (en) | 2017-04-20 |
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