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DE4024381C2 - Pistons for internal combustion engines with forged areas made of steel - Google Patents

Pistons for internal combustion engines with forged areas made of steel

Info

Publication number
DE4024381C2
DE4024381C2 DE19904024381 DE4024381A DE4024381C2 DE 4024381 C2 DE4024381 C2 DE 4024381C2 DE 19904024381 DE19904024381 DE 19904024381 DE 4024381 A DE4024381 A DE 4024381A DE 4024381 C2 DE4024381 C2 DE 4024381C2
Authority
DE
Germany
Prior art keywords
steel
pistons
internal combustion
combustion engines
areas made
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.)
Expired - Fee Related
Application number
DE19904024381
Other languages
German (de)
Other versions
DE4024381A1 (en
Inventor
Werner H Bregler
Dieter Mueller-Schwelling
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.)
Mahle GmbH
Original Assignee
Mahle 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6411421&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE4024381(C2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mahle GmbH filed Critical Mahle GmbH
Priority to DE19904024381 priority Critical patent/DE4024381C2/en
Priority to US07/728,255 priority patent/US5136992A/en
Publication of DE4024381A1 publication Critical patent/DE4024381A1/en
Application granted granted Critical
Publication of DE4024381C2 publication Critical patent/DE4024381C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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 
    • 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
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0403—Refractory metals, e.g. V, W
    • F05C2201/0406—Chromium
    • 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
    • F05C2201/04—Heavy metals
    • F05C2201/0403—Refractory metals, e.g. V, W
    • F05C2201/0409—Molybdenum
    • 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
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

Die Erfindung betrifft einen Kolben für Verbrennungsmotoren mit geschmiedeten Bereichen aus Stahl nach dem Oberbegriff des Patentanspruchs.The invention relates to a piston for internal combustion engines with forged areas made of steel according to the generic term of the claim.

Als Stahlwerkstoff wurde bisher überwiegend der vergütete Chrom-Molybdän-Stahl 42CrMo4 eingesetzt. Er gilt für diesen Einsatzbereich als ein sehr guter Kompromiss in bezug auf seine Umformbarkeit, seine Festigkeitseigenschaften, Bear­ beitbarkeit, Härtbarkeit und Kosten.Up to now, the tempered material has predominantly been the steel material Chromium-molybdenum steel 42CrMo4 used. It applies to this Application area as a very good compromise in terms of its formability, its strength properties, Bear processability, hardenability and costs.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, einen kostengünstigeren, insbesondere kostengünstiger zu verarbeitenden, Werkstoff mit vergleichbar guten Eigen­ schaften einzusetzen.Proceeding from this, the object of the invention is a less expensive, in particular less expensive processing, material with comparable good properties insert shafts.

Gelöst wird diese Aufgabe durch die Verwendung eines aus­ scheidungshärtenden ferritisch-perlitischen Stahles in der Zusammensetzung nach dem kennzeichnendem Merkmal des Pa­ tentanspruchs.This task is solved by using one separating hardening ferritic-pearlitic steel in the Composition according to the characteristic feature of Pa entitlement.

Aus der lediglich ein älteres Recht darstellenden DE 41 09 628 C2 sind gattungsgemäße Kolben bekannt, bei denen Stahlwerkstoffe gemäß Stahl-Eisen-Werkstoffblatt 101 einge­ setzt werden. Diesem Umstand wurde durch entsprechende An­ spruchsformulierung Rechnung getragen. From the DE, which merely represents an older right 41 09 628 C2 generic pistons are known, in which Steel materials according to steel-iron material sheet 101 inserted be set. This fact was confirmed by the corresponding An wording taken into account.  

Aus der DE 37 19 569 A1 sind erfindungsgemäße Werkstoffe und deren Verwendung für Bauteile im Automobilbau bekannt.DE 37 19 569 A1 describes materials according to the invention and their use for components in automotive engineering.

Außerdem ist aus der DE 39 35 091 A1 ein Gelenkkolben be­ kannt, der ein Kopfteil aus Stahl und einen Kolbenschaft aus einer Aluminiumlegierung aufweist.In addition, from DE 39 35 091 A1 an articulated piston be knows who has a steel headboard and a piston skirt made of an aluminum alloy.

Die erfindungsgemäß vorgeschlagenen Stähle eignen sich be­ sonders für den Einsatz bei Gelenkkolben, bei denen der Kolbenkopf mit den Naben lediglich über den Kolbenbolzen mit dem Kolbenschaft verbunden ist.The steels proposed according to the invention are suitable especially for use with articulated pistons where the Piston head with the hubs only over the piston pin is connected to the piston skirt.

Ein weiteres Einsatzgebiet sind Kolben, bei denen der Kol­ benboden aus Stahl und über Schrauben mit dem Kolbenunter­ teil fest verbunden ist.Another area of application is pistons, in which the col steel base and screws with the piston bottom part is firmly connected.

Claims (1)

Kolben für Verbrennungsmotoren mit geschmiedeten Berei­ chen aus einem ausscheidungshärtenden ferritisch-perli­ tischen Stahl und Bereichen aus Leichtmetall, gekennzeichnet durch die folgende Zusammensetzung des Stahles mit Ausnahme der AFP-Stähle nach Stahl-Eisen-Werkstoffblatt 101:
C = 0,32-0,45
Si = 0,4-0,9
Mn = 1,0-1,8
P bis zu 0,035
S bis zu 0,065
V = 0,06-0,15Pistons for internal combustion engines with forged areas made of a precipitation-hardening ferritic-pearlitic steel and areas made of light metal, characterized by the following composition of the steel with the exception of AFP steels according to steel-iron material sheet 101:
C = 0.32-0.45
Si = 0.4-0.9
Mn = 1.0-1.8
P up to 0.035
S up to 0.065
V = 0.06-0.15
DE19904024381 1990-07-12 1990-08-01 Pistons for internal combustion engines with forged areas made of steel Expired - Fee Related DE4024381C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19904024381 DE4024381C2 (en) 1990-08-01 1990-08-01 Pistons for internal combustion engines with forged areas made of steel
US07/728,255 US5136992A (en) 1990-07-12 1991-07-11 Piston for internal combustion engines with forged sections made of steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904024381 DE4024381C2 (en) 1990-08-01 1990-08-01 Pistons for internal combustion engines with forged areas made of steel

Publications (2)

Publication Number Publication Date
DE4024381A1 DE4024381A1 (en) 1992-02-06
DE4024381C2 true DE4024381C2 (en) 1999-01-28

Family

ID=6411421

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904024381 Expired - Fee Related DE4024381C2 (en) 1990-07-12 1990-08-01 Pistons for internal combustion engines with forged areas made of steel

Country Status (1)

Country Link
DE (1) DE4024381C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013009209A1 (en) 2013-05-31 2014-03-27 Daimler Ag Producing piston for internal combustion engine by welding two components made of steel with each other using welding unit, forming rotationally symmetrical weld seam, and pre-heating portions of components using heat treatment unit
DE102014001806A1 (en) 2014-02-11 2014-08-28 Daimler Ag Manufacturing piston useful for an internal combustion engine, comprises welding at least two components with each other by a weld seam, in which at least one of components to be welded, is formed from steel having specific carbon content

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19910582A1 (en) * 1999-03-10 2000-09-28 Mahle Gmbh Built piston
DE102012009030A1 (en) * 2012-05-05 2013-11-07 Mahle International Gmbh Arrangement of a piston and a crankcase for an internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719569A1 (en) * 1986-07-05 1988-01-21 Thyssen Edelstahlwerke Ag MICROALLOY STEEL AND ITS USE
DE3935091A1 (en) * 1988-10-26 1990-05-03 Metal Leve Sa TWO-PIECE PISTON
DE4109628C2 (en) * 1990-07-12 1997-04-17 Mahle Gmbh Use of a precipitation hardening ferritic pearlitic steel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719569A1 (en) * 1986-07-05 1988-01-21 Thyssen Edelstahlwerke Ag MICROALLOY STEEL AND ITS USE
DE3935091A1 (en) * 1988-10-26 1990-05-03 Metal Leve Sa TWO-PIECE PISTON
DE4109628C2 (en) * 1990-07-12 1997-04-17 Mahle Gmbh Use of a precipitation hardening ferritic pearlitic steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Stahl-Eisen-Werkstoffblatt, SEW 101 v. Okt. 1988 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013009209A1 (en) 2013-05-31 2014-03-27 Daimler Ag Producing piston for internal combustion engine by welding two components made of steel with each other using welding unit, forming rotationally symmetrical weld seam, and pre-heating portions of components using heat treatment unit
DE102014001806A1 (en) 2014-02-11 2014-08-28 Daimler Ag Manufacturing piston useful for an internal combustion engine, comprises welding at least two components with each other by a weld seam, in which at least one of components to be welded, is formed from steel having specific carbon content

Also Published As

Publication number Publication date
DE4024381A1 (en) 1992-02-06

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8339 Ceased/non-payment of the annual fee