CN106566962A - Al-Si alloy piston - Google Patents

Al-Si alloy piston Download PDF

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Publication number
CN106566962A
CN106566962A CN201610989124.6A CN201610989124A CN106566962A CN 106566962 A CN106566962 A CN 106566962A CN 201610989124 A CN201610989124 A CN 201610989124A CN 106566962 A CN106566962 A CN 106566962A
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CN
China
Prior art keywords
alloy
piston
alloy piston
aluminium
alsi
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610989124.6A
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Chinese (zh)
Inventor
张达明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUXI MINGSHENG STRONG BLOWER CO Ltd
Original Assignee
WUXI MINGSHENG STRONG BLOWER CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WUXI MINGSHENG STRONG BLOWER CO Ltd filed Critical WUXI MINGSHENG STRONG BLOWER CO Ltd
Priority to CN201610989124.6A priority Critical patent/CN106566962A/en
Publication of CN106566962A publication Critical patent/CN106566962A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent

Abstract

The invention discloses an Al-Si alloy piston. A hypereutectic Al-Si alloy is adopted for the Al-Si alloy piston, and comprises the following components in percentage by mass: 22-26% of Si, 0.5-2.5% of Cu, 0.3-1.2% of Mg, 0.2-0.6% of Mn, 0.2-0.4% of Ti, 0.15-0.25% of Zn and the balance of Al. By adoption of the Al-Si alloy piston disclosed by the invention, the defects that a conventional Si-Al alloy piston is low in size stability and anti-seizure load capacity, and the volume is subjected to irreversible expansion at high temperature can be overcome.

Description

A kind of aluminium-silicon alloy piston
Technical field
The present invention relates to technical field of engines, more particularly to a kind of aluminium-silicon alloy piston.
Background technology
One important measures of parts material lightweight are exactly for steel with aluminum.Aluminium alloy has light specific gravity, easy-formation, ratio The features such as intensity height, good corrosion resistance, it is widely used on auto parts and components as light metal.And based on Si added elements, it is auxiliary The Al-Si alloys of the addition element such as Cu, Mg are helped, not only proportion is lighter than traditional aluminium alloy, and with good elevated temperature strength, resistance to The advantages of mill property, thermostability and relatively low thermal coefficient of expansion, the ideal material that iron prepares engine piston is that instead of, should It is very wide with prospect.
Hypoeutectic and eutectic Al-Si alloy overcome that AlCu systems alloy thermal coefficient of expansion is big, the shortcoming that density is big, and own Jing is wide It is general to be applied in the production of automobile and motorcycle piston.However, the fatal problem that the two classes alloy is present in actual applications is Piston size stability is poor, bite-resistant load capacity is poor, produces the irreversible expansion of volume so as to cause " Cylinder sticking " existing during high temperature The generation of elephant so that electromotor cannot normal work.Due to above-mentioned defect inevitable in performance, hypoeutectic and altogether Brilliant alusil alloy can not increasingly meet the requirement of Modern Engine light weight high speed as the own Jing of application of piston material.Altogether On the basis of brilliant alusil alloy, improve Si and high silicon transcocrystallized Al-Si alloy is obtained containing putting, it is the mechanical behavior under high temperature of alloy, wear-resisting Property, dimensional stability and anti-seizing property are greatly improved.
Therefore, strengthen transcocrystallized Al-Si alloy so as to improving the performance of piston, meeting the electromotor for improving constantly The requirement of energy, is of great practical significance.
The content of the invention
It is an object of the invention to propose a kind of AlSi alloy piston, the work of piston overpowers traditional Si-Al alloys is enabled to Plug poor dimensional stability, bite-resistant load capacity are poor, and the irreversible expansion of volume is produced during high temperature.
It is that, up to this purpose, the present invention is employed the following technical solutions:
A kind of AlSi alloy piston, the AlSi alloy piston adopt hyper eutectic silicon aluminium alloy, wherein by mass percentage Meter Si 22-26%, Cu 0.5-2.5%, Mg 0.3-1.2%, Mn 0.2-0.6%, Ti 0.2-0.4%, Zn 0.15- 0.25%, Al surplus.
Find, when Si contents are 22-26%, have most during alloy graining by the research to Hypereutectic Al-Si Alloy Little solidification shrinkage rate.The wear rate of Al-Si alloys is raised after falling before with the increase of Si contents, unmetamorphosed alusil alloy Wear rate minimum point is in Si contents 21% or so, and the alusil alloy minimum point for going bad is 26% or so.Therefore the present invention will Si contents determine in 22-26%, preferred 23-24%.
A small amount of Mg is individually added in Al-Si alloys and forms Mg2Si hardening constituents.During quenching, Mg2Si is incorporated in αsolidsolution, Form dispersion phase precipitation after Ageing Treatment again so that the crystalline temperature battle array of αsolidsolution is distorted, and so as to reinforced alloys, significantly carries High intensity, but alloy elongation percentage can decline.
Cu can improve the hardness and mechanical behavior under high temperature of aluminium alloy, and its solid solution effect can also improve the anti-tired of aluminium alloy Labor intensity.But as the chemical potential of Cu is higher than Al, intercrystalline corrosion and stress corrosion are also easy to produce, reduce the corrosion resistance of aluminium alloy.
In the present invention, while adding Cu and Mg, W hardening constituent (Al are formed in aluminium alloyxMg5Si4Cu4), compare Mg2Si And CuAl2Phase, the reinforcing effect of W phases preferably, can significantly promote the raising of alloy mechanical property.But Cu and Mg is in Al-Si alloys In total amount it is very few, reinforcing effect is just little, but total amount is too high, causes the plasticity of alloy to be deteriorated again.Therefore the present invention selects Cu 0.5-2.5%, Mg 0.3-1.2%.
In the present invention, Mn is used for the illeffectss for eliminating Fe.Meanwhile, 0.2-0.6% scope of the Mn contents in the present invention It is interior, moreover it is possible to increase alloy plasticity.As Fe easily forms acicular beta-FeSiAl with Si, Al in the alloy5Phase, seriously isolates alloy Matrix, reduces alloy obdurability.During Mn can make alloy, Fe is mutually turned into fine and closely woven skeleton shape α-Fe phases from gill shape β-Fe, reduces Harm.
In the present invention, Ti is used for crystal grain thinning, improves the mechanical property and plasticity of alloy, and peritectic reaction occurs being formed α (Al) phase.But Ti contents can not be too big, and otherwise unnecessary Ti can generate the TiAl of free state3, after aggregation, cause the mechanics of material Hydraulic performance decline.
The structure and casting method of the piston of the present invention, is the known technology of this area, and the present invention is no longer superfluous to which State.
The present invention manufactures aluminium-silicon alloy piston by the alloy of selection special component so that its room temperature strength reaches More than 240MPa, 300 DEG C of elevated temperature strengths reach more than 160MPa, and hardness reaches 140-150HBS, can meet the requirement of piston.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of AlSi alloy piston, the AlSi alloy piston adopt hyper eutectic silicon aluminium alloy, wherein by mass percentage Meter Si 22%, Cu 0.5%, Mg 1.2%, Mn 0.2%, Ti 0.2%, Zn 0.15%, Al surpluses.
After testing so that its room temperature strength reaches more than 240MPa, 300 DEG C of elevated temperature strengths reach more than 160MPa, hardness 140-150HBS is reached, the requirement of piston can be met.
Embodiment 2
A kind of AlSi alloy piston, the AlSi alloy piston adopt hyper eutectic silicon aluminium alloy, wherein by mass percentage Meter Si 23.5%, Cu 2.5%, Mg 0.5%, Mn 0.4%, Ti 0.4%, Zn 0.25%, Al surpluses.
After testing so that its room temperature strength reaches more than 240MPa, 300 DEG C of elevated temperature strengths reach more than 160MPa, hardness 140-150HBS is reached, the requirement of piston can be met.
Embodiment 3
A kind of AlSi alloy piston, the AlSi alloy piston adopt hyper eutectic silicon aluminium alloy, wherein by mass percentage Meter Si 26%, Cu 2.5%, Mg 1.2%, Mn 0.6%, Ti 0.4%, Zn 0.25%, Al surpluses.
After testing so that its room temperature strength reaches more than 240MPa, 300 DEG C of elevated temperature strengths reach more than 160MPa, hardness 140-150HBS is reached, the requirement of piston can be met.

Claims (2)

1. a kind of AlSi alloy piston, the AlSi alloy piston adopt hyper eutectic silicon aluminium alloy, wherein by mass percentage Si 22-26%, Cu 0.5-2.5%, Mg 0.3-1.2%, Mn 0.2-0.6%, Ti 0.2-0.4%, Zn 0.15- 0.25%, Al surplus.
2. aluminium-silicon alloy piston according to claim 1, it is characterised in that Si contents are 23-24%.
CN201610989124.6A 2016-11-10 2016-11-10 Al-Si alloy piston Pending CN106566962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610989124.6A CN106566962A (en) 2016-11-10 2016-11-10 Al-Si alloy piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610989124.6A CN106566962A (en) 2016-11-10 2016-11-10 Al-Si alloy piston

Publications (1)

Publication Number Publication Date
CN106566962A true CN106566962A (en) 2017-04-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610989124.6A Pending CN106566962A (en) 2016-11-10 2016-11-10 Al-Si alloy piston

Country Status (1)

Country Link
CN (1) CN106566962A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05179384A (en) * 1991-12-27 1993-07-20 Honda Motor Co Ltd High strength and high toughness aluminum alloy manufactured by spray deposition method
CN1546708A (en) * 2003-12-03 2004-11-17 东华大学 Aluminum silicon alloy series possessing granulated silicon phase and its process
CN101775530A (en) * 2010-03-04 2010-07-14 安徽省恒泰活塞制造有限公司 Hypereutectic al-si alloy piston material
EP2236637A2 (en) * 2009-04-03 2010-10-06 Technische Universität Clausthal Pressure casting mould made of a hypereutectic aluminium silicon cast alloy and method for producing same
CN104651679A (en) * 2015-02-16 2015-05-27 山东滨州华创金属有限公司 Insoluble metal-reinforced aluminum alloy material for piston

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05179384A (en) * 1991-12-27 1993-07-20 Honda Motor Co Ltd High strength and high toughness aluminum alloy manufactured by spray deposition method
CN1546708A (en) * 2003-12-03 2004-11-17 东华大学 Aluminum silicon alloy series possessing granulated silicon phase and its process
EP2236637A2 (en) * 2009-04-03 2010-10-06 Technische Universität Clausthal Pressure casting mould made of a hypereutectic aluminium silicon cast alloy and method for producing same
CN101775530A (en) * 2010-03-04 2010-07-14 安徽省恒泰活塞制造有限公司 Hypereutectic al-si alloy piston material
CN104651679A (en) * 2015-02-16 2015-05-27 山东滨州华创金属有限公司 Insoluble metal-reinforced aluminum alloy material for piston

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
胡慧芳: "《Al-25Si合金Si相形态、变质及性能研究》", 《中国博士学位论文全文数据库(工程科技1辑)》 *

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