DE4322786A1 - Piston for internal combustion engines with forged regions made of steel - Google Patents

Piston for internal combustion engines with forged regions made of steel

Info

Publication number
DE4322786A1
DE4322786A1 DE19934322786 DE4322786A DE4322786A1 DE 4322786 A1 DE4322786 A1 DE 4322786A1 DE 19934322786 DE19934322786 DE 19934322786 DE 4322786 A DE4322786 A DE 4322786A DE 4322786 A1 DE4322786 A1 DE 4322786A1
Authority
DE
Germany
Prior art keywords
steel
piston
internal combustion
combustion engines
weight
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.)
Ceased
Application number
DE19934322786
Other languages
German (de)
Inventor
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
Application filed by Mahle GmbH filed Critical Mahle GmbH
Priority to DE19934322786 priority Critical patent/DE4322786A1/en
Publication of DE4322786A1 publication Critical patent/DE4322786A1/en
Ceased 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
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/01—Pistons; Trunk pistons; Plungers characterised by the use of particular materials
    • 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
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Landscapes

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

Abstract

A precipitation-hardening ferritic-perlitic steel for pistons of internal combustion engines with a composition, each in per cent by weight, 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 Balance Fe is to be improved in respect of its ease of manufacture and strength on use in pistons. For this purpose, the steel contains a proportion of 0.01-0.1% by weight of Ti. To increase the strength, the proportion of S can be limited to 0.04% by weight.

Description

Die Erfindung betrifft einen Kolben für Verbrennungsmotoren mit geschmiedeten Bereichen aus Stahl nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a piston for internal combustion engines with forged areas made of steel according to the generic term of claim 1.

Die Erfindung beschäftigt sich mit dem Problem, die Her­ stellbarkeit des für den Kolben eingesetzten gattungsgemä­ ßen Stahles zu verbessern. Des weiteren soll dessen Festig­ keit für den Einsatz bei Kolben erhöht werden.The invention deals with the problem that Her adjustability of the generic used for the piston to improve steel. Furthermore, its festig should for use with pistons.

Eine Lösung dieses Problems zeigt das kennzeichnende Merk­ mal des Patentanspruchs 1 auf.The characteristic note shows a solution to this problem times of claim 1.

Eine zweckmäßige Ausgestaltung ist Gegenstand des Anspruchs 2.A practical embodiment is the subject of the claim 2nd

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 Überschrauben mit dem Kolbenunter­ teil fest verbunden sind.Another area of application is pistons, in which the col steel base and screwing with the piston bottom are firmly connected.

Claims (2)

1. Kolben für Verbrennungsmotoren mit geschmiedeten Berei­ chen aus einem ausscheidungshärtenden ferritisch-perli­ tischen Stahl mit jeweils in Gewichtsprozenten angege­ benen Anteilen von
C = 0,32-0,45
Si = 0,40-0,90
Mn = 1,00-1,80
P = bis zu 0,035
S = bis zu 0,065
V = 0,06-0,15
Rest Fe,
insbesondere in den an den Brennraum angrenzenden Be­ reichen sowie an den Naben und Bereichen aus Leichtme­ tall, insbesondere im Bereich des Kolbenschaftes, dadurch gekennzeichnet, daß der Stahl einen Anteil von
Ti = 0,01-0,1 Gew-%
besitzt.1. Pistons for internal combustion engines with forged areas made of a precipitation hardening ferritic-pearlitic steel, each with a percentage by weight
C = 0.32-0.45
Si = 0.40-0.90
Mn = 1.00-1.80
P = up to 0.035
S = up to 0.065
V = 0.06-0.15
Rest Fe,
especially in the area adjacent to the combustion chamber Be as well as on the hubs and areas of Leichtme tall, especially in the area of the piston skirt, characterized in that the steel has a share of
Ti = 0.01-0.1% by weight
owns. 2. Kolben nach Anspruch 1, dadurch gekennzeichnet, daß der Stahl einen Anteil von
S = bis zu 0,04 Gew.-%
besitzt.2. Piston according to claim 1, characterized in that the steel has a proportion of
S = up to 0.04% by weight
owns.
DE19934322786 1993-07-08 1993-07-08 Piston for internal combustion engines with forged regions made of steel Ceased DE4322786A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934322786 DE4322786A1 (en) 1993-07-08 1993-07-08 Piston for internal combustion engines with forged regions made of steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934322786 DE4322786A1 (en) 1993-07-08 1993-07-08 Piston for internal combustion engines with forged regions made of steel

Publications (1)

Publication Number Publication Date
DE4322786A1 true DE4322786A1 (en) 1995-01-12

Family

ID=6492283

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19934322786 Ceased DE4322786A1 (en) 1993-07-08 1993-07-08 Piston for internal combustion engines with forged regions made of steel

Country Status (1)

Country Link
DE (1) DE4322786A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000053913A1 (en) * 1999-03-10 2000-09-14 Mahle Gmbh Multi-piece piston

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000053913A1 (en) * 1999-03-10 2000-09-14 Mahle Gmbh Multi-piece piston
US6622613B1 (en) 1999-03-10 2003-09-23 Mahle Gmbh Multipiece piston

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Legal Events

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8110 Request for examination paragraph 44
8131 Rejection