EP2455505A1 - Tête de cylindre pour moteurs à combustion à partir d'un alliage en aluminium - Google Patents

Tête de cylindre pour moteurs à combustion à partir d'un alliage en aluminium Download PDF

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Publication number
EP2455505A1
EP2455505A1 EP11189488A EP11189488A EP2455505A1 EP 2455505 A1 EP2455505 A1 EP 2455505A1 EP 11189488 A EP11189488 A EP 11189488A EP 11189488 A EP11189488 A EP 11189488A EP 2455505 A1 EP2455505 A1 EP 2455505A1
Authority
EP
European Patent Office
Prior art keywords
cylinder head
aluminum alloy
alloy
less
head according
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.)
Withdrawn
Application number
EP11189488A
Other languages
German (de)
English (en)
Inventor
Ansgar Pithan
Hubert Koch
Marcel Rosefort
Andreas Kleine
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.)
Trimet Aluminium SE
Martinrea Honsel Germany GmbH
Original Assignee
Trimet Aluminium SE
Martinrea Honsel Germany GmbH
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 Trimet Aluminium SE, Martinrea Honsel Germany GmbH filed Critical Trimet Aluminium SE
Publication of EP2455505A1 publication Critical patent/EP2455505A1/fr
Withdrawn legal-status Critical Current

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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
    • C22C21/04—Modified aluminium-silicon alloys
    • 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
    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F2007/009—Hypereutectic aluminum, e.g. aluminum alloys with high SI content

Definitions

  • the invention relates to a cylinder head for internal combustion engines according to the preamble of claim 1.
  • Cylinder heads of internal combustion engines form the upper end of the combustion chamber.
  • a seal of the combustion chamber between the bearing surfaces of the cylinder block and the cylinder head is ensured by the cylinder head gasket.
  • B. the known T6 method and T7 method used. It is known that the addition of alloying elements has a different influence on the individual properties of the component made of the respective aluminum alloy. Thus, an improvement of strength and creep resistance z. B. can be achieved by copper and magnesium additives. Low iron content can increase ductility, as well as Zr, Cu, Ni and Ti additions, in terms of heat resistance. An addition of Cu leads to a less favorable behavior in terms of corrosion and ductility.
  • an aluminum alloy for a cylinder head for internal combustion engines contains, in addition to aluminum, 4.0 to 7.0% Si, 0.5 to 2.0% Cu, 0.25 to 0.5% Mg, not more than 0.5% Fe, not more than 0.5 % Mn and at least one element selected from the group of 0.002 to 0.02% Na, 002 to 0.02% Ca and 0.002 to 0.02% Sr and unavoidable impurities.
  • the alloy may also contain Ti, B and / or Zr, each of which may be present in an amount of from 0.005 to 0.2% by weight. It is disclosed that the described alloy due to the Si, Cu and Mg contents has a high time and fatigue strength and thermal fatigue strength.
  • Another aluminum alloy is used in the EP 1 331 281 A1 containing from 10 to 12% by weight of Si, from 0.15 to 0.5% by weight of Mg, from 0.5 to 1.0% by weight of Mn, not more than 0.15% by weight.
  • Fe not more than 0.1% by weight of Ti, from 0.05 to 0.2% by weight of Sb, 0.005 to 0.2% by weight of B and unavoidable impurities and a balance of Al.
  • the disclosed alloy should be suitable for die casting without compromising the mechanical properties of the alloy by the manufacturing process.
  • the invention is therefore based on the object to provide a cylinder head for internal combustion engines of such an aluminum alloy, which is better adapted to the increasing demands on a cylinder head.
  • the alloy in addition to aluminum and unavoidable impurities, contains alloying elements, in each case based on the weight of the alloy, in the proportions indicated below:
  • the proportion of Si is 6 to 12 wt .-%.
  • the proportion of Fe is less than 0.5 wt .-% and preferably less than 0.1 wt .-%.
  • the content of Cu is 0.0015 to 3 wt%, and preferably 0.003 to 1.0 wt%.
  • the proportion of Mn is less than 0.4 wt .-% and preferably less than 0.02 wt .-%.
  • the proportion of Mg is 0.05 to 1 wt%, and preferably 0.15 to 0.45 wt%.
  • the proportion of Zn is less than 0.4 wt .-%, and preferably less than 0.04 wt .-%.
  • the proportion of B is 0.0005 to 0.025 wt%, and preferably 0.0025 to 0.01 wt%.
  • the proportion of Ti and Zr in addition is less than 0.008 wt .-%.
  • the alloy according to the invention may also contain V, which may for example also be introduced by impurities in the starting materials. It is advantageous to keep the content of V in the alloy as low as possible.
  • the total amount of Ti, Zr and V should preferably not exceed 0.008 wt%, more preferably 0.0030 wt%.
  • the proportions of the alloying elements can each be independently selected and adjusted.
  • the z. B. may be introduced via the raw materials used.
  • the alloy according to the invention exhibits a very fine microstructure, as a result of which an increase in the thermal conductivity is also achieved.
  • Another advantage of the alloy is that a very fine microstructure is obtained. This fine structure is due to a reduced Dendritenarmabstand. Dendrites are crystal structures that have so-called secondary arms. The smaller this distance is, ie the closer the arms are to each other, the finer is the structure.
  • the claimed alloy shows a lower dendrite arm spacing at the same cooling rate compared to the standard alloys containing Ti, Zr and / or V. The difference is 10 to 15%.
  • the alloy may contain further elements which further influence the properties of the alloy and refined, such as sodium, strontium or phosphorus.
  • the person skilled in the art can select the type and quantity of these elements accordingly.
  • the alloy can be used to make complicated castings such as cylinder heads.
  • the production is usually done by sand casting or chill casting. Processing by die casting is less preferred.
  • Table 1 a tabular list of alloying elements in wt .-% of two standard alloys, which are used for cylinder heads, and two alloys of the invention is shown.
  • Table 2 shows the properties of the alloys.
  • the aluminum alloys compared in Table 1 both comprise the same alloying elements.
  • the weight proportions of Si, Fe, Cu, Mn, Mg, Sr, V and Zn are in the aluminum alloy according to the invention and the standard aluminum alloy for cylinder heads in a comparable order of magnitude.
  • the largest difference in the weight proportions of these alloying elements is with respect to Zn at a ratio of almost 3: 1 (invention / standard).
  • the weight proportions of the alloying elements Ti, Zr and B differ much more from each other and have very different orders of magnitude.
  • the ratio of the weight proportions of Ti is 1:12, Zr 1:15 and B 30: 1 (each in comparison invention / standard).
  • Table 2 gives different values of the two aluminum alloys compared in Table 1, which are indicative of the ductility of the two standard T7 standard heat treated aluminum alloys.
  • the yield strength and the tensile strength remain in a comparable range, whereas the breaking elongation of the aluminum alloy according to the invention with 11% compared to 5% in the standard alloy occupies a value more than twice as large.
  • the cylinder head according to the invention of this aluminum alloy has a greatly increased ductility.
  • the Figures 1 and 2 show the structure of the standard alloy 1 and the inventive alloy 2 from Table 1. These representations show that the microstructure of the alloy according to the invention is finer than the structure of the standard alloy. So is the Dendritenarmabstand the standard alloy 47 microns and that of the alloy according to the invention only 21 microns, at the same solidification rates.
  • FIG. 3 Using a graphic illustrates the FIG. 3 the improvement of the thermal conductivity in percent in a temperature range from 0 to 400 ° C. While at room temperature the increase in thermal conductivity is above 14%, this percentage decreases relatively constantly to a percentage of about 9 at a temperature of 300 ° C.
  • Such improved thermal conductivity allows also improved heat dissipation into the cylinder head. In this way, a reduction of the thermal load can be achieved.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP11189488A 2010-11-19 2011-11-17 Tête de cylindre pour moteurs à combustion à partir d'un alliage en aluminium Withdrawn EP2455505A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010060670 DE102010060670A1 (de) 2010-11-19 2010-11-19 Zylinderkopf für Verbrennungsmotoren aus einer Aluminiumlegierung

Publications (1)

Publication Number Publication Date
EP2455505A1 true EP2455505A1 (fr) 2012-05-23

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EP11189488A Withdrawn EP2455505A1 (fr) 2010-11-19 2011-11-17 Tête de cylindre pour moteurs à combustion à partir d'un alliage en aluminium

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EP (1) EP2455505A1 (fr)
DE (1) DE102010060670A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103540809A (zh) * 2012-07-10 2014-01-29 通用汽车环球科技运作有限责任公司 用于结构部件的铸造铝合金
CN104233014A (zh) * 2014-09-30 2014-12-24 无锡康柏斯机械科技有限公司 一种轴流压缩机动叶片合金材料及其制备方法
CN106435294A (zh) * 2016-09-24 2017-02-22 清远市顺博铝合金有限公司 一种低成本的高导热铝合金及其制备方法
WO2018095186A1 (fr) * 2016-11-23 2018-05-31 比亚迪股份有限公司 Alliage d'aluminium thermoconducteur et son utilisation
CN108546853A (zh) * 2018-07-16 2018-09-18 山东华宇合金材料有限公司 一种新型高导热压铸铝合金材料及其制备方法
CN108588513A (zh) * 2018-08-10 2018-09-28 合肥工业大学 一种改性a356铝合金及其多次时效热处理方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1331281A1 (fr) 2002-01-18 2003-07-30 Nissan Motor Company, Limited Alliage d'aluminium pour moulage sous pression, méthode de moulage sous pression avec cet alliage, et produit moulé sous pression obtenu par cette méthode
US20060133949A1 (en) * 2003-07-10 2006-06-22 Gerard Laslaz Moulded AL-SI-CU aluminium alloy component with high hot-process resistance
WO2007051162A2 (fr) * 2005-10-28 2007-05-03 Alcoa Inc. Alliage d'al-si-mg a resistance elevee aux chocs et procedes destines a la production d'un moulage automobile
DE102006059899A1 (de) * 2006-12-19 2008-06-26 Bayerische Motoren Werke Ag Hochwarmfeste Aluminium-Gusslegierung
EP1972696A1 (fr) * 2007-03-15 2008-09-24 Bayerische Motorenwerke Aktiengesellschaft Alliage d'aluminium de fonderie
EP2014780A1 (fr) 2007-07-06 2009-01-14 Nissan Motor Co., Ltd. Alliage d'aluminium de moulage et tête de cylindre de moteur à combustion interne
EP2041328B1 (fr) * 2006-07-14 2010-01-27 BDW technologies GmbH Alliage en aluminium et son utilisation pour un composant coule notamment d'un véhicule automobile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2271139T3 (es) * 2001-06-07 2007-04-16 Bayerische Motoren Werke Aktiengesellschaft Afino de aleaciones de fundicion de aluminio por medio de la adicion de boro.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1331281A1 (fr) 2002-01-18 2003-07-30 Nissan Motor Company, Limited Alliage d'aluminium pour moulage sous pression, méthode de moulage sous pression avec cet alliage, et produit moulé sous pression obtenu par cette méthode
US20060133949A1 (en) * 2003-07-10 2006-06-22 Gerard Laslaz Moulded AL-SI-CU aluminium alloy component with high hot-process resistance
WO2007051162A2 (fr) * 2005-10-28 2007-05-03 Alcoa Inc. Alliage d'al-si-mg a resistance elevee aux chocs et procedes destines a la production d'un moulage automobile
EP2041328B1 (fr) * 2006-07-14 2010-01-27 BDW technologies GmbH Alliage en aluminium et son utilisation pour un composant coule notamment d'un véhicule automobile
DE102006059899A1 (de) * 2006-12-19 2008-06-26 Bayerische Motoren Werke Ag Hochwarmfeste Aluminium-Gusslegierung
EP1972696A1 (fr) * 2007-03-15 2008-09-24 Bayerische Motorenwerke Aktiengesellschaft Alliage d'aluminium de fonderie
EP2014780A1 (fr) 2007-07-06 2009-01-14 Nissan Motor Co., Ltd. Alliage d'aluminium de moulage et tête de cylindre de moteur à combustion interne

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103540809A (zh) * 2012-07-10 2014-01-29 通用汽车环球科技运作有限责任公司 用于结构部件的铸造铝合金
CN103540809B (zh) * 2012-07-10 2016-11-23 通用汽车环球科技运作有限责任公司 用于结构部件的铸造铝合金
CN104233014A (zh) * 2014-09-30 2014-12-24 无锡康柏斯机械科技有限公司 一种轴流压缩机动叶片合金材料及其制备方法
CN106435294A (zh) * 2016-09-24 2017-02-22 清远市顺博铝合金有限公司 一种低成本的高导热铝合金及其制备方法
WO2018095186A1 (fr) * 2016-11-23 2018-05-31 比亚迪股份有限公司 Alliage d'aluminium thermoconducteur et son utilisation
CN108546853A (zh) * 2018-07-16 2018-09-18 山东华宇合金材料有限公司 一种新型高导热压铸铝合金材料及其制备方法
CN108588513A (zh) * 2018-08-10 2018-09-28 合肥工业大学 一种改性a356铝合金及其多次时效热处理方法

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