EP0411282A2 - Utilisation d'aciers ferritiques-perlitiques à durcissement par précipitation comme matériau pour soupapes de moteurs à combustion - Google Patents
Utilisation d'aciers ferritiques-perlitiques à durcissement par précipitation comme matériau pour soupapes de moteurs à combustion Download PDFInfo
- Publication number
- EP0411282A2 EP0411282A2 EP90110888A EP90110888A EP0411282A2 EP 0411282 A2 EP0411282 A2 EP 0411282A2 EP 90110888 A EP90110888 A EP 90110888A EP 90110888 A EP90110888 A EP 90110888A EP 0411282 A2 EP0411282 A2 EP 0411282A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- steels
- valves
- steel
- combustion engines
- precipitation hardening
- 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
Links
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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.
- 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-carbidic steels, which have to be heat-treated several times according to the production sequence both at the steelmaker and at the valve manufacturer, to use steels which achieve the required valve properties as far as possible without heat treatment 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.
- AFP steels compared to martensitic-carbide valve steels are, in addition to less crack and decarburization sensitivity: . low alloy expenditure . better strand castability . less sensitivity to coarse-grained recrystallization . better machinability.
- Plate 1 Comparative steels 1.4718 (X45CrSi93) and AFP steel Chemical composition - melt analysis (data in mass%) element Steel 1.4718 AFP steel A B C.
Landscapes
- 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)
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 | ||
DE4014072 | 1990-05-02 | ||
DE4014072A DE4014072A1 (de) | 1989-06-09 | 1990-05-02 | Verwendung von ausscheidungshaertenden ferritisch-perlitischen (afp-)staehlen als werkstoff fuer gaswechselventile von verbrennungsmotoren |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0411282A2 true EP0411282A2 (fr) | 1991-02-06 |
EP0411282A3 EP0411282A3 (en) | 1991-07-31 |
EP0411282B1 EP0411282B1 (fr) | 1993-08-25 |
Family
ID=25881758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90110888A Expired - Lifetime EP0411282B1 (fr) | 1989-06-09 | 1990-06-08 | Utilisation d'aciers ferritiques-perlitiques à durcissement par précipitation comme matériau pour soupapes de moteurs à combustion |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0411282B1 (fr) |
JP (1) | JP2820776B2 (fr) |
KR (1) | KR0151154B1 (fr) |
CA (1) | CA2018636C (fr) |
DE (2) | DE4014072A1 (fr) |
ES (1) | ES2045652T3 (fr) |
FI (1) | FI96327C (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995017529A1 (fr) * | 1993-12-21 | 1995-06-29 | Vereinigte Schmiedewerke Gmbh | Procede de fabrication de roues pour vehicules ferroviaires et d'elements de ces roues |
CN104895695A (zh) * | 2015-05-18 | 2015-09-09 | 夏志清 | 一种柴油发动机气缸盖 |
Families Citing this family (12)
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 |
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 |
Citations (5)
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 |
DE1934153A1 (de) * | 1968-08-28 | 1970-03-05 | Inland Steel Co | Gegenstaende aus zaehem,hochwertigen Stahl und Verfahren zu deren Herstellung |
US3846184A (en) * | 1968-08-06 | 1974-11-05 | Bethlehem Steel Corp | Wear resistant steel |
US4634573A (en) * | 1981-09-10 | 1987-01-06 | Daido Tokushuko Kabushiki Kaisha | Steel for cold forging and method of making |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1990
- 1990-05-02 DE DE4014072A patent/DE4014072A1/de active Granted
- 1990-06-08 ES ES90110888T patent/ES2045652T3/es not_active Expired - Lifetime
- 1990-06-08 CA CA002018636A patent/CA2018636C/fr not_active Expired - Lifetime
- 1990-06-08 EP EP90110888A patent/EP0411282B1/fr not_active Expired - Lifetime
- 1990-06-08 DE DE90110888T patent/DE59002456D1/de not_active Expired - Lifetime
- 1990-06-09 KR KR1019900008591A patent/KR0151154B1/ko not_active IP Right Cessation
- 1990-06-11 JP JP2152484A patent/JP2820776B2/ja not_active Expired - Lifetime
- 1990-06-11 FI FI902899A patent/FI96327C/fi active IP Right Grant
Patent Citations (5)
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 |
DE1934153A1 (de) * | 1968-08-28 | 1970-03-05 | Inland Steel Co | Gegenstaende aus zaehem,hochwertigen Stahl und Verfahren zu deren Herstellung |
US4634573A (en) * | 1981-09-10 | 1987-01-06 | Daido Tokushuko Kabushiki Kaisha | Steel for cold forging and method of making |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995017529A1 (fr) * | 1993-12-21 | 1995-06-29 | Vereinigte Schmiedewerke Gmbh | Procede de fabrication de roues pour vehicules ferroviaires et d'elements de ces roues |
CN104895695A (zh) * | 2015-05-18 | 2015-09-09 | 夏志清 | 一种柴油发动机气缸盖 |
CN104895695B (zh) * | 2015-05-18 | 2017-09-19 | 宏远石油设备股份有限公司 | 一种柴油发动机气缸盖 |
Also Published As
Publication number | Publication date |
---|---|
ES2045652T3 (es) | 1994-01-16 |
JPH03219045A (ja) | 1991-09-26 |
CA2018636C (fr) | 2000-10-24 |
EP0411282B1 (fr) | 1993-08-25 |
EP0411282A3 (en) | 1991-07-31 |
KR0151154B1 (ko) | 1998-11-16 |
FI902899A0 (fi) | 1990-06-11 |
DE59002456D1 (de) | 1993-09-30 |
FI96327B (fi) | 1996-02-29 |
FI96327C (fi) | 1996-06-10 |
DE4014072C2 (fr) | 1991-12-05 |
CA2018636A1 (fr) | 1990-12-09 |
KR910001081A (ko) | 1991-01-30 |
DE4014072A1 (de) | 1990-12-20 |
JP2820776B2 (ja) | 1998-11-05 |
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