SE526903C2 - Gray iron alloy and cast internal combustion engine component - Google Patents

Gray iron alloy and cast internal combustion engine component

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Publication number
SE526903C2
SE526903C2 SE0201431A SE0201431A SE526903C2 SE 526903 C2 SE526903 C2 SE 526903C2 SE 0201431 A SE0201431 A SE 0201431A SE 0201431 A SE0201431 A SE 0201431A SE 526903 C2 SE526903 C2 SE 526903C2
Authority
SE
Sweden
Prior art keywords
alloy
gray iron
internal combustion
vanadium
combustion engine
Prior art date
Application number
SE0201431A
Other languages
Swedish (sv)
Other versions
SE0201431D0 (en
SE0201431L (en
Inventor
Martti Penttinen
Carl Bjoerkman
Tobias Bjoerklind
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE0201431A priority Critical patent/SE526903C2/en
Publication of SE0201431D0 publication Critical patent/SE0201431D0/en
Priority to DE60333748T priority patent/DE60333748D1/en
Priority to AU2003243063A priority patent/AU2003243063A1/en
Priority to SI200331893T priority patent/SI1506323T1/en
Priority to DK03750007.1T priority patent/DK1506323T3/en
Priority to BRPI0309975-0A priority patent/BR0309975B1/en
Priority to CNB03811027XA priority patent/CN1320150C/en
Priority to ES03750007T priority patent/ES2350478T3/en
Priority to PCT/SE2003/000770 priority patent/WO2003095692A1/en
Priority to EP03750007A priority patent/EP1506323B1/en
Priority to KR1020047018233A priority patent/KR100616649B1/en
Priority to AT03750007T priority patent/ATE477347T1/en
Priority to JP2004503680A priority patent/JP4137054B2/en
Publication of SE0201431L publication Critical patent/SE0201431L/en
Publication of SE526903C2 publication Critical patent/SE526903C2/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

A substantially perlitic, grey cast iron alloy comprising, by weight, 3.2 - 3.49% carbon, 1.8 - 2.2% silicon, < 0.15% sulphur, < 0.15% phosphorus, 0.3 - 0.8% manganese, 0.2 - 0.4% chromium, 0.1 - 0.4% molybdenum, 0.03 - 0.3% vanadium, 0.3 - 1.0% copper, < 0.15% niobium, the balance iron and impurities.

Description

20 25 30 526 903 2 Ett syfte med föreliggande uppfinning är att åstadkomma ett gråjärn med en förhål- landevis tät struktur och som erbjuder goda maskinbearbetbarhetsegenskaper och som därtill har en väsentligt förbättrad utmattningshållfasthet jämfört med den hos en standardlegering. An object of the present invention is to provide a gray iron with a relatively dense structure and which offers good machinability properties and which in addition has a significantly improved fatigue strength compared to that of a standard alloy.

Ett ytterligare syfte med föreliggande uppfinning är att åstadkomma en gråjärns- komponent för en förbränningsmotor, såsom ett motorblock, som har en väsentligt förbättrad utmattningshållfasthet jämfört med den hos en standardlegering.A further object of the present invention is to provide a gray iron component for an internal combustion engine, such as an engine block, which has a significantly improved fatigue strength compared to that of a standard alloy.

Sammanfattning av uppfinningen Syftet med föreliggande uppfinning uppnås med ett gråj äm i enlighet med bifogat patentkrav 1. Föredragna utföringsformer anges i de beroende patentlcraven.Summary of the Invention The object of the present invention is achieved with a gray iron in accordance with appended claim 1. Preferred embodiments are set out in the dependent claims.

Vidare uppnås syftet med föreliggande uppfinning med en fórbränningsmotorkom- ponent av gråj ärn enligt bifogat patentkrav 7. Föredragna utföringsformer anges i de oberoende patentlcraven.Furthermore, the object of the present invention is achieved with a combustion engine component of gray iron according to appended claim 7. Preferred embodiments are stated in the independent patent claims.

Kort ritningsbeskrivning Fig. 1 visar Wöhler-utmattningskurvor för en baslegering, en standardlegering och en legering enligt uppfinningen.Brief Description of the Drawings Fig. 1 shows Wöhler fatigue curves for a base alloy, a standard alloy and an alloy according to the invention.

Detaljerad beskrivning av de föredragna utfiiringsformerna I den följande beskrivningen anges alla procenttal som ges för element i de angivna legeringama som viktprocent. 10 15 20 25 30 C51 I* J 1 5\ - o CD CJ Legeringen enligt föreliggande uppfinning är ett gråjärn som har en väsentligen per- litisk struktur, där kolhalten är 3,2 - 3,49%. Den förhållandevis höga kolhalten ver- kar för en tät struktur. Tillsatser av 0,2 - 0,4% krom, som har perlit/karbidstabi- liserande egenskaper, åstadkommer en fin perlitisk struktur.Detailed Description of the Preferred Embodiments In the following description, all percentages given for elements in the indicated alloys are given as a percentage by weight. C51 I * J 1 5 \ - o CD CJ The alloy of the present invention is a gray iron having a substantially perlite structure, where the carbon content is 3.2 - 3.49%. The relatively high carbon content works for a dense structure. Additives of 0.2 - 0.4% chromium, which have perlite / carbide stabilizing properties, create a perlite structure.

Tillsatser av 0,1 - 0,4% molybden, 0,03 - 0,3% vanadin, 0,007 - 0,015% titan och < 0,15% niob verkar, utöver deras karbidbildande egenskaper, som kämor åstadkom- mande en fm perlitisk och fiällgrafitisk struktur i gjutet tillstånd (både som primärt och sekundärt utskilda karbider). Molybden stabiliserar också perlit vid förhöjda tßmpfifatllfßf.Additives of 0.1 - 0.4% molybdenum, 0.03 - 0.3% vanadium, 0.007 - 0.015% titanium and <0.15% niobium act, in addition to their carbide-forming properties, as cores to produce a fm perlite and ällallergic structure in the cast state (both as primary and secondary separated carbides). Molybdenum also stabilizes perlite at elevated tßmp fi fatllfßf.

Kisel förefinns i en mängd av 1,8 - 2,2% och verkar för gråjärnsbildning. 0,3 - 0,8% mangan föreligger som en perlitstabiliserare.Silicon is present in an amount of 1.8 - 2.2% and acts for gray iron formation. 0.3 - 0.8% manganese is present as a perlite stabilizer.

Koppar, här i en mängd av 0,3 - 1,0% verkar för perlitbildning och stabiliserar per- liten och verkar också för bildning av en fin struktur.Copper, here in an amount of 0.3 - 1.0%, acts for perlite formation and stabilizes perlite and also acts for the formation of a structure.

Innehållet av svavel och fosfor bör hållas under 0,15%.The sulfur and phosphorus content should be kept below 0.15%.

Kväve, 0,005 - 0,017%, kompakterar fjällgrafit och verkar för perlitbildning och aluminium, < 0,01%, verkar som grafitbildare.Nitrogen, 0.005 - 0.017%, compacts scales and acts for perlite formation and aluminum, <0.01%, acts as a scavenger.

Gråj ärnslegeringen innefattar vidare järn och normala föroreningar till balans, Mängdema av titan, kväve och aluminium är inom det nonnala föroreningsområdet, men är föredragna. 10 15 20 25 30 526 903 4 Exem el: ISOO-kilossatser tillreddes, där varje sats göts till fyra 300-kilos motorblock, varvid gjutning startade vid 1420°C och temperaturen föll omkring 10°C under gjutproce- duren.The gray iron alloy further includes iron and normal impurities to balance. The amounts of titanium, nitrogen and aluminum are within the normal range of impurities, but are preferred. 10 15 20 25 30 526 903 4 Example: ISOO kilo batches were prepared, where each batch was cast into four 300-kilo engine blocks, whereby casting started at 1420 ° C and the temperature dropped about 10 ° C during the casting procedure.

Tio olika kombinationer, satser, av molybden, vanadin, titan och niob med en basle- gering framställdes.Ten different combinations, batches, of molybdenum, vanadium, titanium and niobium with a base alloy were prepared.

Vidare varierades kväve- och aluminiuminnehållet i 16 olika satser med olika käm- bildare (ympmedel).Furthermore, the nitrogen and aluminum contents were varied in 16 different batches with different nucleating agents (inoculants).

Utmattningstestprovlqoppar togs från varje gjutstycke och utmattningstester utför- des.Fatigue test specimens were taken from each casting and fatigue tests were performed.

Dessutom framställdes satser som kombinerade sammansättningen som visade de bästa resultaten från de föregående testerna och utmattningsprovades.In addition, batches were prepared which combined the composition which showed the best results from the previous tests and fatigue tests were performed.

Resultat visas i Fig. 1, kurva 3, motsvarande samrnansättningar inom sammansätt- ningsområdena enligt uppfinningen där denna sammansättning även visas i Tabell 1.Results are shown in Fig. 1, curve 3, corresponding joint compositions within the composition areas according to the invention, where this composition is also shown in Table 1.

Gråj ärnen enligt uppfinningen erbjuder ca 40% högre utmattningshållfastlret än en gråjärnsbaslegering och ca 30% högre utmattningshållfasthet än ett standardgråjäm för motorblock och erbjuder ändå gråj äm som uppfyller höga prestanda med hänsyn till maskinbearbetbarhet, täthet etc.The gray iron according to the invention offers about 40% higher fatigue strength than a gray iron base alloy and about 30% higher fatigue strength than a standard gray iron for engine blocks and still offers gray iron that meets high performance with regard to machinability, density etc.

Såsom nämnts ovan är gråjärnslegeringen enligt uppfinningen extremt användbar for gjutna komponenter för fórbränningsmotorer, såsom motorblockskomponenter, där legeringen kombinerar maskinbearbetbarhet, täthet och hög utmattningshållfast- het. Legeringen är också användbar för andra komponenter, såsom topplock etc. 10 15 20 Tabell 1. Gråj ärnssammansättningar, i vikt-%, enligt känd teknik och uppfinningen: Ämne Si Mn Cr Cu Ni Ti Z Sn Al Bas 0120 3,2 - 3,5 1,8 - 2,3 0,06 - 0,15 < 0,20 0,6 - 0,8 526 L e g e ri n g Standard- Uppfin- legeiing ningen allmänt ~3,4 3,2 - 3,49 ~2,0 1,8 - 2,2 < 0,14 < 0,15 < 0,10 < 0,15 0,6 - 0,8 0,3 - 0,8 0,2 - 0,35 0,2 - 0,4 0,1 - 0,4 0,03 - 0,3 0,4 - 0,8 0,3 - 1,0 < 0,1 0,007-0,015 < 0,15 0,005-0,017 < 0,1 < 0,01 903 Föredragen utfórings- form 3,3 - 3,4 1,8 - 2,2 < 0,1 < 0,05 0,4 - 0,6 0,2 - 0,4 0,2 - 0,3 0,05 - 0,1 0,5 - 1,0 < 0,1 0,007-0,013 < 0,10 0,005-0,015 < 0,1 < 0,01 Exempel- legering 3 i Fig. 1 3,37 1,8 0,1 0,05 0,68 0,34 0,26 0,1 0,6 0,013 0,04As mentioned above, the gray iron alloy of the invention is extremely useful for cast components for internal combustion engines, such as engine block components, where the alloy combines machinability, density and high fatigue strength. The alloy is also useful for other components, such as top caps, etc. Table 1. Gray iron compositions, in% by weight, according to the prior art and the invention: Substance Si Mn Cr Cu Ni Ti Z Sn Al Base 0120 3.2 - 3, 1.8 - 2.3 0.06 - 0.15 <0.20 0.6 - 0.8 526 L ege ri ng The Standard Invention generally ~ 3.4 3.2 - 3.49 ~ 2.0 1.8 - 2.2 <0.14 <0.15 <0.10 <0.15 0.6 - 0.8 0.3 - 0.8 0.2 - 0.35 0.2 - 0.4 0.1 - 0.4 0.03 - 0.3 0.4 - 0.8 0.3 - 1.0 <0.1 0.007-0.015 <0.15 0.005-0.017 <0.1 <0.01 903 Preferred Embodiment 3.3 - 3.4 1.8 - 2.2 <0.1 <0.05 0.4 - 0.6 0.2 - 0.4 0.2 - 0 .3 0.05 - 0.1 0.5 - 1.0 <0.1 0.007-0.013 <0.10 0.005-0.015 <0.1 <0.01 Example alloy 3 in Fig. 1 3.37 1 .8 0.1 0.05 0.68 0.34 0.26 0.1 0.6 0.013 0.04

Claims (8)

10 15 20 25 30 526 9073 6 Patentkrav10 15 20 25 30 526 9073 6 Patent claims 1. En väsentligen perlitisk grâj ämslegering innefattande, i vikt, 3,2 - 3,49 % kol 1,8 - 2,2 % kisel < 0,15 % svavel < 0,15 % fosfor 0,3 - 0,8 % mangan 0,2 - 0,4 % krom 0,1 - 0,4 % molybden 0,03 - 0,3 % vanadin 0,3 - 1,0 % koppar < 0,15 % niob 0,007 - 0,015 % titan 0,005 - 0,017 % kväve och resten järn och föroreningar.A substantially perlite gray alloy comprising, by weight, 3.2 - 3.49% carbon 1.8 - 2.2% silicon <0.15% sulfur <0.15% phosphorus 0.3 - 0.8% manganese 0.2 - 0.4% chromium 0.1 - 0.4% molybdenum 0.03 - 0.3% vanadium 0.3 - 1.0% copper <0.15% niobium 0.007 - 0.015% titanium 0.005 - 0.017% nitrogen and the rest iron and impurities. 2. Legering enligt krav 1, innefattande 3,3 - 3,4 % kol 1,8 - 2,2 % kisel < 0,1 % Svavel < 0,05 % fosfor 0,4 - 0,6 % mangan 0,2 - 0,4 % krom 0,2 - 0,3 % molybden 0,05 - 0,1 % vanadin.Alloy according to claim 1, comprising 3.3 - 3.4% carbon 1.8 - 2.2% silicon <0.1% Sulfur <0.05% phosphorus 0.4 - 0.6% manganese 0.2 0.4% chromium 0.2 - 0.3% molybdenum 0.05 - 0.1% vanadium. 3. Legering enligt krav 1 eller 2, kännetecknad av att vanadin forefinns i en mängd mindre än 0,1%. 10 l5 20 25Alloy according to Claim 1 or 2, characterized in that vanadium is present in an amount of less than 0.1%. 10 l5 20 25 4. Legering enligt krav 1, 2 eller 3, kännetecknad av att aluminium fórefinns i en mängd mindre än 0,01 %.Alloy according to Claim 1, 2 or 3, characterized in that aluminum is present in an amount of less than 0.01%. 5. Legering enligt något av kraven 1 - 4, kännetecknad av att nickel förefinns i en mängd mindre än 0,1 %.Alloy according to one of Claims 1 to 4, characterized in that nickel is present in an amount of less than 0.1%. 6. Legering enligt något av kraven 1 - 5, kännetecknad av att tenn fiñrefinns i en mängd mindre än 0,1 %.Alloy according to one of Claims 1 to 5, characterized in that the tin is present in an amount of less than 0.1%. 7. Gjuten fórbränningsmotorkomponent av en väsentligen perlitisk gråj ämsleger- ing, där närrmda legering innefattar 3,2 - 3,49 % kol 1,8 - 2,2 % kisel < 0,15 % svavel < 0,15 % fosfor 0,3 - 0,8 % mangan 0,2 - 0,4 % krom 0,1 - 0,4 % molybden 0,03 - 0,3 % vanadin 0,3 - 1,0 % koppar 0,007 - 0,015 % titan < 0,15 % niob 0,005 - 0,015 % kväve < 0,01 % aluminium och resten järn och föroreningar.7. Cast internal combustion engine component of a substantially perlite gray iron alloy, wherein said alloy comprises 3.2 - 3.49% carbon 1.8 - 2.2% silicon <0.15% sulfur <0.15% phosphorus 0.3 0.8% manganese 0.2 - 0.4% chromium 0.1 - 0.4% molybdenum 0.03 - 0.3% vanadium 0.3 - 1.0% copper 0.007 - 0.015% titanium <0, 15% niobium 0.005 - 0.015% nitrogen <0.01% aluminum and the rest iron and impurities. 8. Komponent enligt krav 7, kännetecknad av att det är en motorblockskomponent eller en topplockskomponent.Component according to Claim 7, characterized in that it is an engine block component or a cylinder head component.
SE0201431A 2002-05-13 2002-05-13 Gray iron alloy and cast internal combustion engine component SE526903C2 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
SE0201431A SE526903C2 (en) 2002-05-13 2002-05-13 Gray iron alloy and cast internal combustion engine component
JP2004503680A JP4137054B2 (en) 2002-05-13 2003-05-12 Gray cast iron alloy and internal combustion engine casting parts
CNB03811027XA CN1320150C (en) 2002-05-13 2003-05-12 Gray cast iron alloy and cast internal combustion engine component
PCT/SE2003/000770 WO2003095692A1 (en) 2002-05-13 2003-05-12 Gray cast iron alloy and cast internal combustion engine component
SI200331893T SI1506323T1 (en) 2002-05-13 2003-05-12 Gray cast iron alloy and cast internal combustion engine component
DK03750007.1T DK1506323T3 (en) 2002-05-13 2003-05-12 Gray cast iron alloy and cast internal combustion engine component
BRPI0309975-0A BR0309975B1 (en) 2002-05-13 2003-05-12 gray cast iron alloy and cast internal combustion engine component.
DE60333748T DE60333748D1 (en) 2002-05-13 2003-05-12 GRAY CAST IRON ALLOY AND COMBUSTION ENGINE COMPONENT
ES03750007T ES2350478T3 (en) 2002-05-13 2003-05-12 GRAY FOUNDATION ALLOY AND INTERNAL FUNDITION COMBUSTION ENGINE COMPONENT.
AU2003243063A AU2003243063A1 (en) 2002-05-13 2003-05-12 Gray cast iron alloy and cast internal combustion engine component
EP03750007A EP1506323B1 (en) 2002-05-13 2003-05-12 Gray cast iron alloy and cast internal combustion engine component
KR1020047018233A KR100616649B1 (en) 2002-05-13 2003-05-12 Grey cast iron alloy and cast internal combustion engine component
AT03750007T ATE477347T1 (en) 2002-05-13 2003-05-12 GRAY CAST IRON ALLOY AND COMBUSTION ENGINE CASTING COMPONENT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0201431A SE526903C2 (en) 2002-05-13 2002-05-13 Gray iron alloy and cast internal combustion engine component

Publications (3)

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SE0201431D0 SE0201431D0 (en) 2002-05-13
SE0201431L SE0201431L (en) 2003-11-14
SE526903C2 true SE526903C2 (en) 2005-11-15

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Country Status (13)

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EP (1) EP1506323B1 (en)
JP (1) JP4137054B2 (en)
KR (1) KR100616649B1 (en)
CN (1) CN1320150C (en)
AT (1) ATE477347T1 (en)
AU (1) AU2003243063A1 (en)
BR (1) BR0309975B1 (en)
DE (1) DE60333748D1 (en)
DK (1) DK1506323T3 (en)
ES (1) ES2350478T3 (en)
SE (1) SE526903C2 (en)
SI (1) SI1506323T1 (en)
WO (1) WO2003095692A1 (en)

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WO2003095692A1 (en) 2003-11-20
DE60333748D1 (en) 2010-09-23
JP4137054B2 (en) 2008-08-20
DK1506323T3 (en) 2010-11-22
ATE477347T1 (en) 2010-08-15
ES2350478T3 (en) 2011-01-24
JP2005525468A (en) 2005-08-25
EP1506323B1 (en) 2010-08-11
AU2003243063A1 (en) 2003-11-11
SI1506323T1 (en) 2011-01-31
CN1320150C (en) 2007-06-06
SE0201431D0 (en) 2002-05-13
KR20050010796A (en) 2005-01-28
KR100616649B1 (en) 2006-08-28
BR0309975B1 (en) 2010-12-14
SE0201431L (en) 2003-11-14
BR0309975A (en) 2005-02-22
CN1653202A (en) 2005-08-10

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