EP0411282B1 - Verwendung von ausscheidungshärtenden ferritisch-perlitischen (AFP -) Stählen als Werkstoff für Gaswechselventile von Verbrennungsmotoren - Google Patents

Verwendung von ausscheidungshärtenden ferritisch-perlitischen (AFP -) Stählen als Werkstoff für Gaswechselventile von Verbrennungsmotoren Download PDF

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Publication number
EP0411282B1
EP0411282B1 EP90110888A EP90110888A EP0411282B1 EP 0411282 B1 EP0411282 B1 EP 0411282B1 EP 90110888 A EP90110888 A EP 90110888A EP 90110888 A EP90110888 A EP 90110888A EP 0411282 B1 EP0411282 B1 EP 0411282B1
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EP
European Patent Office
Prior art keywords
valves
steels
combustion engines
steel
valve
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 - Lifetime
Application number
EP90110888A
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German (de)
English (en)
French (fr)
Other versions
EP0411282A2 (de
EP0411282A3 (en
Inventor
Volker Dipl.-Ing. Schüler
Klaus E. Dipl.-Ing. Richter
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.)
Deutsche Edelstahlwerke GmbH
Original Assignee
Thyssen Edelstahlwerke AG
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 Thyssen Edelstahlwerke AG filed Critical Thyssen Edelstahlwerke AG
Priority to AT90110888T priority Critical patent/ATE93549T1/de
Publication of EP0411282A2 publication Critical patent/EP0411282A2/de
Publication of EP0411282A3 publication Critical patent/EP0411282A3/de
Application granted granted Critical
Publication of EP0411282B1 publication Critical patent/EP0411282B1/de
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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

Definitions

  • the invention relates to the use of precipitation hardening ferritic-pearlitic steels, so-called AFP steels, as a material for gas exchange valves of internal combustion engines.
  • Gas exchange valves are intake and exhaust valves in internal combustion engines that regulate the gas exchange in the engine and seal the working area of the cylinder to the outside.
  • FIG. 1 (1) V. editor, T. Kreul, S. Engineer: "Precious structural steels in automobiles", Thyssen Technical Reports 2 (1986), pp. 233-240
  • valve manufacturers take into account the different material properties of the valve materials when designing the differently loaded valves.
  • lightly loaded inlet valves as single-metal valves (“mono valves") are often made from steel 1.4718 (x 45 CrSi 93).
  • tempered, ground rods are partially conductively heated and at the same time compressed in a pear shape. Then the valve plate is forged in the die, then tempered or tempered and finally the final machining takes place.
  • the valve manufacturer is often forced to combine valve materials with one another in a sensible manner. As shown in Fig. 1 using the example of a bimetal valve, e.g.
  • valve disc made of steel 1.4871 (X 53 CrMnNi N 21 9) with a steel 1.4718 (X 45 CrSi 93) the high heat resistance and hot gas corrosion resistance of the hardenable austenitic steel can be combined with the high wear resistance and the good sliding properties of the hardenable martensitic steel.
  • valve materials made of steel 1.4718 (X 45 CrSi 9 3) or modifications are made for intake valves and low-stress exhaust valves and for stems of intake and exhaust bimetallic valves.
  • These steels are processed by the steel manufacturer and valve manufacturer in accordance with the main production sequences as shown in FIGS. 2 and 3.
  • the invention is based on the object, instead of the previously used martensitic carbide steels, which have to be heat-treated several times according to the production sequence both for the steel producer and for the valve manufacturer, to use steels which achieve the required valve properties without heat treatment as far as possible and require less machining effort.
  • AFP steels both after rolling to wire and after upsetting and drop forging with controlled cooling of hot-forming temperature in air (“state BY”), have mechanical-technological values which are comparable to those of steel 1.4718.
  • Table 1 shows the chemical composition
  • Table 2 and Fig. 4 the strength properties at room temperature and elevated temperatures.
  • Table 3 and Fig. 5 indicate the creep rupture strength of the comparison materials 1.4718 (X 45 CrSi 9 3) and an AFP steel.
  • AFP steels in the BY condition are a sensible alternative to the well-known steel 1.4718.
  • the intake valves made from the AFP steel to be used according to the invention at a valve manufacturer were cooled in still air after upsetting and drop forging and tested in engine test benches without tempering and other heat treatment. The results found are also positive and sufficient compared to the previously used steel 1.4718.
  • Steels to be used according to the invention have the advantage over the materials previously used for gas exchange valves that they can be simplified according to the production sequences shown in FIGS. 6 and 7 and can thus be produced more cost-effectively.
  • the first thing that is noticeable when using AFP steels is the absence of heat treatments at the steelmaker and valve manufacturer.
  • the lower crack and decarburization sensitivity of AFP steels compared to steel 1.4718 and the lack of decarburization due to the absence of heat treatment processes mean that the semi-finished product that is required today for further rolling in steel 1.4718 due to partial stain grinding on AFP steels be replaced.
  • the machining allowance for centerless grinding of bar steel can be reduced or even saved entirely by using drawn bars instead of ground bars in AFP steels as the raw material for the production of gas exchange valves.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Catalysts (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP90110888A 1989-06-09 1990-06-08 Verwendung von ausscheidungshärtenden ferritisch-perlitischen (AFP -) Stählen als Werkstoff für Gaswechselventile von Verbrennungsmotoren Expired - Lifetime EP0411282B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90110888T ATE93549T1 (de) 1989-06-09 1990-06-08 Verwendung von ausscheidungshaertenden ferritisch- perlitischen (afp -) staehlen als werkstoff fuer gaswechselventile von verbrennungsmotoren.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3918869 1989-06-09
DE3918869 1989-06-09
DE4014072A DE4014072A1 (de) 1989-06-09 1990-05-02 Verwendung von ausscheidungshaertenden ferritisch-perlitischen (afp-)staehlen als werkstoff fuer gaswechselventile von verbrennungsmotoren
DE4014072 1990-05-02

Publications (3)

Publication Number Publication Date
EP0411282A2 EP0411282A2 (de) 1991-02-06
EP0411282A3 EP0411282A3 (en) 1991-07-31
EP0411282B1 true EP0411282B1 (de) 1993-08-25

Family

ID=25881758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110888A Expired - Lifetime EP0411282B1 (de) 1989-06-09 1990-06-08 Verwendung von ausscheidungshärtenden ferritisch-perlitischen (AFP -) Stählen als Werkstoff für Gaswechselventile von Verbrennungsmotoren

Country Status (7)

Country Link
EP (1) EP0411282B1 (ko)
JP (1) JP2820776B2 (ko)
KR (1) KR0151154B1 (ko)
CA (1) CA2018636C (ko)
DE (2) DE4014072A1 (ko)
ES (1) ES2045652T3 (ko)
FI (1) FI96327C (ko)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109628C2 (de) * 1990-07-12 1997-04-17 Mahle Gmbh Verwendung eines ausscheidungshärtenden ferritisch perlitischen Stahls
DE4137240A1 (de) * 1991-11-13 1993-05-19 Thyssen Edelstahlwerke Ag Verwendung von afp-staehlen fuer die herstellung von werkzeugen
DE4341811A1 (de) * 1993-12-08 1995-06-14 Man B & W Diesel Ag Gaswechselventil für eine Brennkraftmaschine
DE4343565C1 (de) * 1993-12-21 1995-06-08 Ver Schmiedewerke Gmbh Verfahren zur Herstellung von Schienenrädern und Schienenradteilen
DE4406896C1 (de) * 1994-03-03 1995-06-29 Daimler Benz Ag Verfahren zum Härten von Einmetall-Ventilen, insbesondere von Einlaßventilen für Brennkraftmaschinen
DE19618477C2 (de) * 1996-05-08 2000-08-03 Trw Deutschland Gmbh Herstellungsverfahren für ein nitriertes Bimetallventil
DE10029299C2 (de) * 2000-06-14 2003-03-27 Daimler Chrysler Ag Mehrteilig zusammengesetztes Ventil für Hubkolbenmaschinen
DE10031927A1 (de) * 2000-06-30 2002-01-24 Daimler Chrysler Ag Mehrteilig zusammengesetztes Leichtbauventil für Hubkolbenmaschinen
DE10037132A1 (de) * 2000-07-31 2002-02-14 Volkswagen Ag Tellerventil und Verfahren zum Herstellen eines Tellerventils
DE102007021101A1 (de) * 2007-05-03 2008-11-06 Mahle International Gmbh Legierter Stahl und dessen Verwendung
DE102007026018B4 (de) 2007-06-04 2023-01-19 Scania Cv Ab Bimetallventil mit einem kegelstumpfförmig ausgebildeten Bereich des Ventilschafts
DE102008061237A1 (de) * 2008-12-09 2010-06-10 Man Diesel Se Gaswechselventil und Verfahren zu seiner Herstellung
DE102013210897A1 (de) * 2013-06-11 2014-12-11 Mahle International Gmbh Verfahren zur Herstellung eines gebauten Hohlventils einer Brennkraftmaschine
CN107514316A (zh) * 2015-05-18 2017-12-26 夏志清 一种柴油发动机气缸盖

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1007175A (en) * 1961-07-05 1965-10-13 Trafik Ab Alloys
GB1101193A (en) * 1966-01-21 1968-01-31 United Steel Companies Ltd Steel
US3846184A (en) * 1968-08-06 1974-11-05 Bethlehem Steel Corp Wear resistant steel
US3562028A (en) * 1968-08-28 1971-02-09 Inland Steel Co Tough,high strength steel article
JPS5845354A (ja) * 1981-09-10 1983-03-16 Daido Steel Co Ltd はだ焼鋼
JPS62274051A (ja) * 1986-05-21 1987-11-28 Kobe Steel Ltd 耐疲労性、耐へたり性に優れた弁ばね用鋼線
DE3719569C2 (de) * 1986-07-05 1988-06-23 Thyssen Edelstahlwerke Ag Mikrolegierte Stähle.
JPS6468424A (en) * 1987-09-07 1989-03-14 Kobe Steel Ltd Production of high-toughness non-tempered hot forging having excellent fatigue resistance and machinability

Also Published As

Publication number Publication date
FI902899A0 (fi) 1990-06-11
FI96327B (fi) 1996-02-29
DE4014072C2 (ko) 1991-12-05
KR0151154B1 (ko) 1998-11-16
EP0411282A2 (de) 1991-02-06
JP2820776B2 (ja) 1998-11-05
CA2018636C (en) 2000-10-24
DE4014072A1 (de) 1990-12-20
CA2018636A1 (en) 1990-12-09
ES2045652T3 (es) 1994-01-16
FI96327C (fi) 1996-06-10
DE59002456D1 (de) 1993-09-30
JPH03219045A (ja) 1991-09-26
KR910001081A (ko) 1991-01-30
EP0411282A3 (en) 1991-07-31

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