EP0924311A1 - Aluminiumlegierung - Google Patents

Aluminiumlegierung Download PDF

Info

Publication number
EP0924311A1
EP0924311A1 EP98123802A EP98123802A EP0924311A1 EP 0924311 A1 EP0924311 A1 EP 0924311A1 EP 98123802 A EP98123802 A EP 98123802A EP 98123802 A EP98123802 A EP 98123802A EP 0924311 A1 EP0924311 A1 EP 0924311A1
Authority
EP
European Patent Office
Prior art keywords
alloy
piston
component elements
alloy according
ppm
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.)
Granted
Application number
EP98123802A
Other languages
English (en)
French (fr)
Other versions
EP0924311B1 (de
Inventor
Simon Thomas Gazzard
Jonathan David Philby
Simon Barnes
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.)
Federal Mogul Bradford Ltd
Original Assignee
Federal Mogul Bradford 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 Federal Mogul Bradford Ltd filed Critical Federal Mogul Bradford Ltd
Publication of EP0924311A1 publication Critical patent/EP0924311A1/de
Application granted granted Critical
Publication of EP0924311B1 publication Critical patent/EP0924311B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F02F3/00—Pistons 
    • 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
    • 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
    • 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
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/042—Expansivity

Definitions

  • the present invention relates to an aluminium-silicon alloy.
  • the alloy has use in the manufacture of pistons, in particular for use in internal combustion engines.
  • pistons are exposed to both static and dynamic stresses, while operating in bulk temperatures from subzero to up to 400°C. These stresses will also differ in different regions of the piston, for example a combustion bowl in a piston will be subject to different thermal and mechanical stresses than piston pin bosses.
  • the piston must also have low thermal expansion, and possess good bearing characteristics with marginal lubrication over the noted range of temperatures. Also, the piston material must lend itself to being formed into a piston, for example by casting with subsequent working.
  • Known casting alloys for piston manufacture include those disclosed in US 3 765 877.
  • the alloys disclosed therein is an aluminium based alloy including silicon from 7 to 20 percent, copper from 3.5 to 6 percent, up to 2.5 percent nickel, from 0.1 to 0.6 percent magnesium, and from 0.1 to 1.0 percent silver with the balance being aluminium and unavoidable impurities.
  • the present invention has as an advantage improved boss strength and also improved high temperature strength in the region of the piston crown.
  • the alloy of the present invention is selected from a group of aluminium alloys with each alloy component element being present in weight percent as follows:
  • Nickel content in this alloy is believed to lead to the formation of thermally stable intermetallics. This in turn leads to high temperature strength for the alloy. More than 2 wt% Nickel leads to the formation of large NI rich intermetallics, particularly for the low cooling rates associated with large piston castings, which are seriously detrimental to the high temperature fatigue strength of the alloy.
  • the Cobalt content is chosen to allow the formation of a large number of small intermetallics. This is believed to improve the mechanical properties of the alloy at 350°C.
  • the presence of the Cobalt in the Aluminium alloy at a level in excess of 0.2 wt% is believed to reduce the diffusivity of the Copper in Aluminium, thereby slowing the overaging mechanism of the alloy. This has particular importance when considering the operation of a piston pin boss operating at around 200°C.
  • the presence of the Cobalt is believed also to lead to an increase in fatigue strength of the alloy at 350°C. This is of particular importance when considering the operation of a combustion bowl of a piston which is typically subject to such temperatures.
  • the Silver is believed to give improved boss strength to a piston manufactured from this alloy.
  • up to 0.6 weight percent Silver increases the fatigue strength of the alloy at 200°C.
  • the thermal conductivity of the alloy at 350°C is raised without adversely affecting the expansion coefficient.
  • the addition of Silver in this range does not appear to cause castability problems.
  • Zinc, Lead and Tin may each also be present in amounts up to 0.1 wt%.
  • the alloy may additionally comprise at least one of the following component elements
  • Titanium, Zirconium and/or Vanadium are each believed to act as grain refining additions in the alloy.
  • the Copper content is at least 2.5 wt %, and may be less than 3.5 wt %.
  • the use of a specific alloy composition in manufacture of forged pistons has proven to be particularly advantageous.
  • the metal alloy compositions of a first alloy according to the present invention with the component elements being indicated in weight percent are:
  • a second alloy according to the invention has a similar composition to the first alloy save that the nickel is present from 0.5 to 1.5 wt%.
  • a third alloy according to the present invention has a similar composition to the first and second alloys, but may additionally comprise at least one of the following component elements:
  • a fourth alloy according to the present invention has a similar composition to that of Example 3, but may additionally comprise at least one of the following component elements:
  • a fifth alloy according to the present invention with the component elements being indicated in weight percent are indicated in weight percent.
  • a sixth alloy according to the present invention has a similar composition to fifth alloy according to the present invention, but may additionally comprise at least one of the following component elements:
  • alloys of the present invention in addition to their use in the manufacture of forged pistons, may be used in the manufacture of gravity die cast pistons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP19980123802 1997-12-20 1998-12-15 Aluminiumlegierung Expired - Lifetime EP0924311B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9726844A GB2332449B (en) 1997-12-20 1997-12-20 Aluminium alloy
GB9726844 1997-12-20

Publications (2)

Publication Number Publication Date
EP0924311A1 true EP0924311A1 (de) 1999-06-23
EP0924311B1 EP0924311B1 (de) 2003-05-02

Family

ID=10823887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980123802 Expired - Lifetime EP0924311B1 (de) 1997-12-20 1998-12-15 Aluminiumlegierung

Country Status (3)

Country Link
EP (1) EP0924311B1 (de)
DE (1) DE69814013T2 (de)
GB (1) GB2332449B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102021409A (zh) * 2009-09-17 2011-04-20 贵州华科铝材料工程技术研究有限公司 Ag-Co-RE高强耐热铝合金材料及其制备方法
CN102021381B (zh) * 2009-09-17 2013-08-21 贵州华科铝材料工程技术研究有限公司 以C变质的Ag-Co-RE高强耐热铝合金材料及其制备方法
WO2014076174A1 (de) * 2012-11-14 2014-05-22 Federal-Mogul Nürnberg GmbH Verfahren zur herstellung eines motorbauteils, motorbauteil und verwendung einer aluminiumlegierung
EP2865772A1 (de) * 2013-10-23 2015-04-29 Befesa Aluminio, S.L. Aluminiumgusslegierung
EP2865774A1 (de) * 2013-10-23 2015-04-29 Befesa Aluminio, S.L. Aluminiumgusslegierung
CN110629079A (zh) * 2019-10-25 2019-12-31 江苏铭利达科技有限公司 用于新能源汽车的铝合金材料
WO2020016283A1 (de) * 2018-07-18 2020-01-23 Friedrich Deutsch Metallwerk Ges.M.B.H. Aluminiumdruckgusslegierung
US11391238B2 (en) 2019-05-16 2022-07-19 Mahel International GmbH Process for producing an engine component, engine component and the use of an aluminum alloy

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765877A (en) * 1972-11-24 1973-10-16 Olin Corp High strength aluminum base alloy
EP0445684A1 (de) * 1990-03-06 1991-09-11 Ykk Corporation Hochfeste, warmfeste Legierungen auf Aluminiumbasis
DE19524564A1 (de) * 1995-06-28 1997-01-02 Vaw Alucast Gmbh Aluminiumguß-Legierung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB616413A (en) * 1946-09-05 1949-01-20 Rupert Martin Bradbury An improved aluminium base alloy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765877A (en) * 1972-11-24 1973-10-16 Olin Corp High strength aluminum base alloy
EP0445684A1 (de) * 1990-03-06 1991-09-11 Ykk Corporation Hochfeste, warmfeste Legierungen auf Aluminiumbasis
DE19524564A1 (de) * 1995-06-28 1997-01-02 Vaw Alucast Gmbh Aluminiumguß-Legierung

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102021409A (zh) * 2009-09-17 2011-04-20 贵州华科铝材料工程技术研究有限公司 Ag-Co-RE高强耐热铝合金材料及其制备方法
CN102021409B (zh) * 2009-09-17 2013-01-23 贵州华科铝材料工程技术研究有限公司 Ag-Co-RE高强耐热铝合金材料
CN102021381B (zh) * 2009-09-17 2013-08-21 贵州华科铝材料工程技术研究有限公司 以C变质的Ag-Co-RE高强耐热铝合金材料及其制备方法
CN104812921A (zh) * 2012-11-14 2015-07-29 菲特尔莫古纽伦堡公司 制造发动机部件的方法、发动机部件和铝合金的应用
WO2014076174A1 (de) * 2012-11-14 2014-05-22 Federal-Mogul Nürnberg GmbH Verfahren zur herstellung eines motorbauteils, motorbauteil und verwendung einer aluminiumlegierung
JP2016505382A (ja) * 2012-11-14 2016-02-25 フェデラル−モーグル ニュルンベルグ ゲゼルシャフト ミット ベシュレンクテル ハフツング エンジンコンポーネントを製造する方法、エンジンコンポーネント、および、アルミニウム合金の使用
CN104812921B (zh) * 2012-11-14 2018-01-19 菲特尔莫古纽伦堡公司 制造发动机部件的方法、发动机部件和铝合金的应用
US10022788B2 (en) 2012-11-14 2018-07-17 Federal-Mogul Nurnberg Gmbh Method for producing an engine component, engine component, and use of an aluminium alloy
JP2018114556A (ja) * 2012-11-14 2018-07-26 フェデラル−モーグル ニュルンベルグ ゲゼルシャフト ミット ベシュレンクテル ハフツング エンジンコンポーネントを製造する方法、エンジンコンポーネント、および、アルミニウム合金の使用
EP2865772A1 (de) * 2013-10-23 2015-04-29 Befesa Aluminio, S.L. Aluminiumgusslegierung
EP2865774A1 (de) * 2013-10-23 2015-04-29 Befesa Aluminio, S.L. Aluminiumgusslegierung
WO2020016283A1 (de) * 2018-07-18 2020-01-23 Friedrich Deutsch Metallwerk Ges.M.B.H. Aluminiumdruckgusslegierung
US11391238B2 (en) 2019-05-16 2022-07-19 Mahel International GmbH Process for producing an engine component, engine component and the use of an aluminum alloy
CN110629079A (zh) * 2019-10-25 2019-12-31 江苏铭利达科技有限公司 用于新能源汽车的铝合金材料

Also Published As

Publication number Publication date
GB2332449B (en) 2002-05-22
GB9726844D0 (en) 1998-02-18
GB2332449A (en) 1999-06-23
DE69814013D1 (de) 2003-06-05
EP0924311B1 (de) 2003-05-02
DE69814013T2 (de) 2003-11-27

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