DE2428821A1 - WEAR-RESISTANT CAST IRON ALLOY WITH LAMELLAR TO BONE-SHAPED GRAPHITE EXECUTION - Google Patents

WEAR-RESISTANT CAST IRON ALLOY WITH LAMELLAR TO BONE-SHAPED GRAPHITE EXECUTION

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Publication number
DE2428821A1
DE2428821A1 DE19742428821 DE2428821A DE2428821A1 DE 2428821 A1 DE2428821 A1 DE 2428821A1 DE 19742428821 DE19742428821 DE 19742428821 DE 2428821 A DE2428821 A DE 2428821A DE 2428821 A1 DE2428821 A1 DE 2428821A1
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Prior art keywords
percent
weight
limits
wear
cast iron
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DE19742428821
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DE2428821B2 (en
DE2428821C3 (en
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Horst Dr Ing Beyer
Hansjuergen Veutgen
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Goetzewerke Friedrich Goetze AG
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Goetzewerke Friedrich Goetze AG
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Priority to DE19742428821 priority Critical patent/DE2428821C3/en
Priority to IT2275875A priority patent/IT1037649B/en
Priority to FR7515849A priority patent/FR2274703A1/en
Priority to GB2436775A priority patent/GB1482724A/en
Priority to SE7506829A priority patent/SE430701B/en
Publication of DE2428821A1 publication Critical patent/DE2428821A1/en
Publication of DE2428821B2 publication Critical patent/DE2428821B2/en
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Publication of DE2428821C3 publication Critical patent/DE2428821C3/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/04—Cast-iron alloys containing spheroidal graphite
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Heat Treatment Of Articles (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

GOET ZEWERKE Burscheid, d. 6. Juni 1974GOET ZEWERKE Burscheid, d. June 6, 1974

.Friedrich Goetze AG ZBT 329/Lö/Mo. ( 15o6 )Friedrich Goetze AG ZBT 329 / Lö / Mon. (15o6)

Vers chleißfeste Gußeisenlegierung mit lamellarer bis knö t ch enf ö r mig e r Graphitaus s cheidungWear-resistant cast iron alloy with a lamellar to knuckle shape Graphite separation

Die Erfindung betrifft eine hochverschleißfeste Gußeisenlegierung mit lamellarer bis knötchenförmiger Graphitausscheidung.The invention relates to a highly wear-resistant cast iron alloy with lamellar to nodular graphite precipitation.

Reibend beanspruchte Maschinenelemente werden sowohl verschleißmäßig als auch thermisch stark belastet, so daß an ihre Werkstoffe besonders hohe Anforderungen gestellt werden müssen. Bestimmte Maschinenelemente, wie beispielsweise Kolbenringe von Verbrennungskraftmaschinen, und zwar insbesondere Feuerringe, aber auch Dichtleisten von Rotationskolbenmaschinen, stehen darüberhinaus unter besonders starker Belastung. Die Erfahrung hat gezeigt, daß diesen hohen Beanspruchungen nur sehr teure und kompliziert hergestellte Werkstoffe gewachsen sind. Dabei handelt es sich üblicherweise um Sinterhartmetalle, denen ganz definierte Legierungselemente zugegeben worden sind.Machine elements subject to frictional stress are both subject to wear as well as highly thermally stressed, so that particularly high demands must be made on their materials. Certain machine elements, such as piston rings of internal combustion engines, in particular fire rings, but also sealing strips of rotary piston machines, are also under particularly heavy loads. Experience has shown that these are high demands only very expensive and complexly manufactured materials have grown. These are usually Sintered carbides, which contain very defined alloying elements have been admitted.

509851/0656509851/0656

242882] -v- 242882] -v-

Die bisher erprobten Gußeisensorten sind aber für diese hochbeanspruchten Maschinenteile nicht einsetzbar. Es ist bekannt, die Verschleißfestigkeit von Gußeisensorten durch Zugabe von Legierungselementen zu steigern. Diese Elemente jedoch bilden beim Erstarren des Gußeisens relativ grobkörnige und sehr harte Karbide, die dann auf den Gegenlaufflächen unter Riefenbildung Zerstörungen hervorrufen. Gleichzeitig wird durch die Karbidbildung der größte Teil des Kohlenstoffes verbraucht, so daß diesen Legierungen der für den Notlauf dieser Maschinenelemente notwendige Graphit im Gefüge fehlt. Weiterhin sind diese Werkstoffe so spröde, daß sie auch mechanischen Beanspruchungen nicht gewachsen sind und brechen.The types of cast iron that have been tried out so far are highly stressed for these Machine parts cannot be used. It is known that Wear resistance of cast iron grades through the addition of alloying elements to increase. However, when the cast iron solidifies, these elements form relatively coarse-grained and very hard carbides, which then form scoring on the mating surfaces Cause destruction. At the same time, most of the carbon is consumed by the carbide formation, see above that these alloys lack the graphite necessary for the emergency running of these machine elements in their structure. Furthermore are these materials are so brittle that they are also subject to mechanical stress have not grown and break.

Es ist daher die Aufgabe der vorliegenden Erfindung, eine Gußeisenlegierung zu finden, die verschleißfest genug gegen erhöhte Reibungsbeanspruchung ist und dabei mit dem Gegenwerkstoff eine ausreichende Verträglichkeit besitzt, der Graphitausscheidungen aufweist und der bei mechanischer Beanspruchung nicht spröde ist und nicht bricht.It is therefore the object of the present invention to provide a cast iron alloy to find the one that is wear-resistant enough against increased Frictional stress is and at the same time with the counter material has sufficient compatibility, the graphite precipitates and the mechanical Stress is not brittle and does not break.

Diese Aufgabe wird dadurch gelöst, daß eine verschleißfeste Gußeisenlegierung erfunden wird, deren ungebundener Kohlenstoff in lamellarer bis vorwiegend knötchenförmiger Ausscheidung vorliegt, und der eine große Anzahl von Karbiden beziehungsweise auch Nitriden und / oder Boriden in fein kristalliner Ausscheidungsform besitzt. Einer derartigen Gußeisenlegierung sind erfindungsgemäß die folgenden EIe-This object is achieved in that a wear-resistant Cast iron alloy is invented, the unbound carbon in lamellar to predominantly nodular precipitate is present, and a large number of carbides or nitrides and / or borides in fine possesses crystalline precipitate form. One of those According to the invention, cast iron alloys are the following EIe-

609851/0656609851/0656

mente zugegeben:ments admitted:

Kohlenstoff
Silizium
Schwefel
Phosphor
Kupf e rcarbon
silicon
sulfur
phosphorus
He copper

Nickel und/oder
KobaltNickel and / or
cobalt

Zinn und/oder
AntimonTin and / or
antimony

Molybdänmolybdenum

Wolframtungsten

Manganmanganese

Chromchrome

VanadiumVanadium

Titantitanium

Niob und/oder
TantalNiobium and / or
Tantalum

Aluminiumaluminum

in den Grenzen von 1, 5 in den Grenzen von 1,5-in den Grenzen von kleiner in den Grenzen von kleiner in den Grenzen von ο 4, ο Gew.
6, ο Gew.
als o, 2 Gew.
als 2, 5 Gew.
8, ο Gew.within the limits of 1, 5 within the limits of 1.5-within the limits of smaller within the limits of smaller within the limits of ο 4, ο wt.
6, ο wt.
as o, 2 wt.
as 2, 5 wt.
8, ο wt.

Prozent Prozent Prozent Prozent ProzentPercent percent percent percent percent

in den Grenzen vonwithin the limits of

in den Grenzen vonwithin the limits of

in den Grenzen von in den Grenzen von in den Grenzen von in den Grenzen von in den Grenzen von in den Grenzen vonwithin the limits of within the limits of within the limits of within the limits of within the limits of

in den Grenzen von in den Grenzen von -3,5 Gew. - Prozentwithin the limits of -3.5 percent by weight

-2,5 Gew. - Prozent-2.5 percent by weight

OO - 5, ο- 5, ο Gew.Weight - Prozent- percent OO - 5, ο- 5, ο Gew.Weight - Prozent- percent OO - 3, ο- 3, ο Gew.Weight - Prozent- percent OO - 3, ο- 3, ο Gew.Weight - Prozent- percent OO -5, ο-5, ο Gew.Weight - Prozent- percent OO - 2, ο- 2, ο Gew.Weight - Prozent- percent OO -5, ο-5, ο Gew.Weight - Prozent- percent OO - 2, ο- 2, ο Gew.Weight - Prozent- percent

Dabei ist es zweckmäßig, daß die Summe der Elemente Kohlenstoff und Silizium gleich oder größer als 3, ο Gewichtsprozent ist, und daß das Verhältnis Silizium zu Kohlenstoff gleich oder größer als 1 ist.It is useful that the sum of the elements carbon and silicon is equal to or greater than 3. o weight percent, and that the ratio of silicon to carbon is equal to or greater than 1.

Außerdem ist es zweckmäßig, daß die Summe der Elemente Molybdän, Wolfram und Mangan zwischen o, 2 und Io GewichtsprozentIt is also advisable that the sum of the elements molybdenum, tungsten and manganese be between 0.2 and 10 percent by weight

§09851/0856§09851 / 0856

liegt, während sich die Summe der Elemente Chrom, Vanadium, Tantal und/oder Niob zwischen 1 und Io Gewichtsprozent bewegt.lies, while the sum of the elements chromium, vanadium, tantalum and / or niobium is between 1 and 10 percent by weight.

Derartige Legierungen haben dann die Zusammensetzungen in den folgenden Grenzen:Such alloys then have the compositions within the following limits:

Kohlenstoff SiliziumCarbon silicon

Schwefelsulfur

Phosphorphosphorus

Kupfercopper

Nickel und/oder KobaltNickel and / or cobalt

Zinn und/oder AntimonTin and / or antimony

Molybdänmolybdenum

Wolframtungsten

Manganmanganese

Chromchrome

Vanadium TitanVanadium titanium

Niob und/oder TantalNiobium and / or tantalum

Aluminiumaluminum

1,5 - 4, ο Gewichtsprozent 1,5 - 6, ο Gewichtsprozent1.5 - 4, ο percent by weight 1.5 - 6, ο percent by weight

weniger als o, 2 Gewichtsprozent weniger als 2, 5 Gewichtsprozent l,o - 7, ο Gewichtsprozentless than 0.2 percent by weight, less than 2.5 percent by weight, l, o - 7, ο percent by weight

o,4 - 3,2 Gewichtsprozent0.4-3.2 percent by weight

o, 1 - 1,8 Gewichtsprozent0.1-1.8 percent by weight

o, 1 - 4, ο Gewichtsprozento, 1 - 4, ο percent by weight

o, 1 - 4, ο Gewichtsprozento, 1 - 4, ο percent by weight

o, o5 - 2,5 Gewichtsprozento, o5 - 2.5 percent by weight

o, 3 - 2,5 Gewichtsprozent0.3-2.5 percent by weight

o, 3 - 4, ο Gewichtsprozneto, 3 - 4, ο weight percentage

o,.3 - 2, ο Gewichtsprozento, .3 - 2, ο percent by weight

o, 1o, 1

o, 1 Rest Eiseno, 1 remainder iron

4, ο Gewichtsprozent 2, ο Gewichtsprozent4, ο percent by weight 2, ο percent by weight

Es hat sich zusätzlich erwiesen, daß zur Verfeinerung der Ausbildungsform der einzelnen Gefügebestandteile, wie insbesondereIt has also been shown to refine the form of training of the individual structural components, such as in particular

509851/0656509851/0656

•ζ.• ζ.

des Graphits beziehungsweise der Nitride, die Elemente Bor, Wismut, Zirkon, Magnesium und/oder die Metalle der seltenen Erden zugegeben sein können. Ihre Gesamtkonzentration darf jedoch den Wert o, 5 Gewichtsprozent nicht übersteigen.of graphite or nitrides, the elements boron, bismuth, zirconium, magnesium and / or rare earth metals can be admitted. However, their total concentration must not exceed 0.5 percent by weight.

ο
Durch Wärmebehandlung über 7oo C mit nachfolgender Abschrekkung in beispielsweise Luft oder einem Salzbad auf eine Temperatur von unter 5oo C und anschließendes Anlassen bis zu einer Temperatur von 7oo C wird die Verschleißfestigkeit und Verträglichkeit mit dem Gegenwerkstoff erheblich gesteigert.ο
By heat treatment above 700 C with subsequent quenching in, for example, air or a salt bath to a temperature of below 500 C and subsequent tempering up to a temperature of 700 C, the wear resistance and compatibility with the counter material is considerably increased.

Die erfindungsgemäßen Legierungen zeigen ein bainitisches bis martensitisches Grundgefüge. Die Graphitausscheidungen sind lamellar bis knötchenförmig, die Karbidausscheidungen punktbis kugelförmig. Die Härte dieses Werkstoffes liegt bei HV 5The alloys according to the invention show a bainitic to martensitic basic structure. The graphite precipitates are lamellar to nodular, the carbide precipitations point to spherical. The hardness of this material is HV 5

55o bis 92o kp/mm . Das Material ist nicht spröde, und gegossene Dichtleisten für Kreiskolbenmaschinen sind verschleißfest und zeigen im Testlauf eine sehr gute Verträglichkeit mit der Trochoidenlauffläche des Kreiskolbenmotors.55o to 92o kp / mm. The material is not brittle, and poured Sealing strips for rotary piston machines are wear-resistant and show very good compatibility in the test run with the trochoid running surface of the rotary piston engine.

In dem Ausführungsbeispiel ist eine der erfindungs gemäßen Gußeisenlegierungen beschrieben. Die Gußeisenschmelze enthält die Elemente:In the embodiment, one of the cast iron alloys according to the Invention is described. The cast iron contains the Elements:

2,2 Gewichtsprozent Kohlenstoff 3,9" " Silizium2.2 weight percent carbon 3.9 "" silicon

o,9 " " Phosphoro.9 "" phosphorus

509851/0656509851/0656

ο, ο8 Gewichtsprozent Schwefelο, ο8 percent by weight sulfur

1.4 " " Kupfer 0,6 " " Nickel1.4 "" copper 0.6 "" nickel

' ο, 2 " " Zinn'ο, 2 "" tin

1.5 " " Molybdän1.5 "" molybdenum

3.4 " " Wolfram o,9 " " Mangan o,4 " " Chrom3.4 "" tungsten 0.9 "" manganese o, 4 "" chrome

1.5 " " Vanadium o,2 " " Titan1.5 "" vanadium o.2 "" titanium

o, 7' " " ' Niobo, 7 '""' niobium

o, öl " " Boro, oil "" boron

o, 22 " " Aluminiumo, 22 "" aluminum

Nach dem Impfen mit einem der üblichen Impfmittel werden aus der Schmelze Dichtleisten für Kreiskolbenmotoren im Sandformgußverfahren gegossen, die die Abmessungen von 61, o3 χ 8, 3 χ 4,94 mm haben. Anschließend wird eine Stunde bei 85o C geglüht, in einem Ölbad auf Raumtemperatur abgeschreckt und eine Stunde bei 35o angelassen.After inoculation with one of the usual inoculants, sealing strips for rotary piston engines are cast from the melt using the sand mold casting process, which have the dimensions 61.03 χ 8.3 χ 4.94 mm. Then it is annealed for one hour at 85o C, quenched in an oil bath to room temperature and left at 35o for an hour.

Die so hergestellten Dichtleisten hatten eine Härte HV 5 vonThe sealing strips produced in this way had a hardness of HV 5 of

2
bis 713 kp/mm . Bei Prüfläufen zeigten die Dichtleisten eine sehr gute Verschleißfestigkeit, während die Trochoidenlaufflächen nur wenig beansprucht blieben.2
up to 713 kp / mm. In test runs, the sealing strips showed very good wear resistance, while the trochoid running surfaces remained only slightly stressed.

Die Abbildungen 1 bis 4 stellen Schliffbilder der Gußeisenle-Figures 1 to 4 show micrographs of the cast iron

609851/0656609851/0656

gierung aus dem Beispiel dar.from the example.

Abbildung 1 zeigt als loo - fache ungeätzte Vergrößerung das Graphit in lamellarer bis knötchenförmiger Form. Figure 1 shows the graphite in a lamellar to nodular form as a 100 - fold, unetched enlargement.

Abbildung 2 zeigt in 5oo - fächer ungeätzter Vergrößerung neben den dunklen Graphitausscheidungen als helle, dunkel umrandete Flächen die fein kristallinen Karbidkörper. Figure 2 shows in 500x unetched enlargement, in addition to the dark graphite precipitates as light, dark-edged surfaces, the finely crystalline carbide bodies.

Die mit HNO geätzte Abbildung 3 läßt in 5oo - fächer Vergrösserung neben den Graphitausscheidungen und den kristallinen Karbidkörpern die bainitisch bis martensitische Gefüge struktur erkennen. Figure 3 , which is etched with ENT, shows the bainitic to martensitic microstructure in addition to the graphite precipitates and the crystalline carbide bodies in 500x magnification.

Die tiefgeätzte Abbildung 4 zeigt in 2o - fächer Vergrößerung das Steatitnetz.The deeply etched figure 4 shows the steatite mesh in a 2o - fold enlargement.

509851/0656509851/0656

Claims (6)

GOET ZEWERKE Friedrich Goetze AG Burscheid, d. 6. Juni 1974 ZBT 329/Lö/Mo. ( 15o6 ) PATENTANSPRÜCHEGOET ZEWERKE Friedrich Goetze AG Burscheid, d. June 6, 1974 ZBT 329 / Lö / Mo. (15o6) PATENT CLAIMS 1.) Verschleißfeste Gußeisenlegierung mit lämellarer bis knöt-1.) Wear-resistant cast iron alloy with lamellar to knot- chenförmiger Graphitausscheidung, dadurch gekennzeichnet, daß die Legierung ausChen-shaped graphite precipitate, characterized in that that the alloy is made of Kohlenstoffcarbon inin denthe GrenzenLimits vonfrom 1,5 -1.5 - 4, ο4, ο Gew. -ProzentWeight percent Siliziumsilicon inin denthe GrenzenLimits vonfrom 1,5 -1.5 - 6, ο6, ο Gew. -ProzentWeight percent Schwefelsulfur inin denthe GrenzenLimits vonfrom kleinersmaller als o,so, 2 Gew. -Prozent2 percent by weight Phosphorphosphorus inin denthe GrenzenLimits vonfrom kleinersmaller als 2,than 2, 5 Gew. -Prozent5 percent by weight Kupfercopper inin denthe GrenzenLimits vonfrom OO 8, ο8, ο Gew. -ProzentWeight percent Nickelnickel und/oderand or inin denthe GrenzenLimits vonfrom ο -ο - 3,53.5 Gew. -ProzentWeight percent Kobaltcobalt Zinntin und/oderand or inin denthe GrenzenLimits vonfrom OO 2,52.5 Gew. -ProzentWeight percent Antimonantimony Molybdänmolybdenum inin denthe GrenzenLimits vonfrom OO 5, ο5, ο Gew. -ProzentWeight percent Wolframtungsten inin denthe GrenzenLimits vonfrom OO 5, ο5, ο Gew.. -ProzentWeight percent Manganmanganese inin denthe GrenzenLimits vonfrom OO 3, ο3, ο Gew. -ProzentWeight percent Chromchrome inin denthe GrenzenLimits vonfrom OO 3,ο3, ο Gew. -ProzentWeight percent
S09851/065SS09851 / 065S Vanadium in den Grenzen von Titan in den Grenzen vonVanadium within the limits of titanium within the limits of Niobniobium und/oder in den Grenzen vonand / or within the limits of TantalTantalum Aluminium in den Grenzen vonAluminum within the limits of ο - 5, ο Gew. -Prozentο - 5, ο percent by weight ο - 2, ο Gew. -Prozentο - 2, ο percent by weight ο - 5, ο Gew. -Prozentο - 5, ο percent by weight ο - 2, ο Gew. -Prozentο - 2, ο percent by weight und Rest Eisen besteht.and the remainder is iron. 2.) Verschleißfeste Gußeisenlegierung nach Patentanspruch 1, dadurch gekennzeichnet, daß das Verhältnis Siliziumgehalt zu Kohlenstoffgehalt gleich oder größer als 1 ist.2.) Wear-resistant cast iron alloy according to claim 1, thereby characterized in that the ratio of silicon content to carbon content is equal to or greater than 1. 3.) Verschleißfeste Gußeisenlegierung nach den Patentansprüchen3.) Wear-resistant cast iron alloy according to the claims 1 und 2, dadurch gekennzeichnet, daß der Gehalt der Elemente Molybdän, Wolfram und/oder Mangan in der Summe in der Legierung zwischen o, 2 und Io Gewichtsprozent liegt.1 and 2, characterized in that the total content of the elements molybdenum, tungsten and / or manganese in the alloy is between 0.2 and 10 percent by weight. 4.:-) Verschleißfeste Gußeisenlegierung nach den Patentansprüchen4. :-) Wear-resistant cast iron alloy according to the claims 1 bis 3, dadurch gekennzeichnet, daß der Gehalt der Elemente Chrom, Vanadium, Tantal und/oder Niob in der Summe in der Legierung zwischen 1 und Io Gewichtsprozent liegt.1 to 3, characterized in that the content of the elements Chromium, vanadium, tantalum and / or niobium in total in the alloy is between 1 and 10 percent by weight. 5.) Verschleißfeste Gußeisenlegierung nach den Patentansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Elemente Bor, Wismut, Zirkon, Magnesium und/oder Metalle der seltenen Erden zu maximal o, 5 Gewichtsprozent in der Summe zugesetzt sind.5.) Wear-resistant cast iron alloy according to claims 1 to 4, characterized in that the elements boron, bismuth, Zirconium, magnesium and / or rare earth metals added to a maximum of 0.5 percent by weight in total are. 509851/0658509851/0658 /Jo./ Jo. 6.) Verschleißfeste Gußeisenlegierung nach den Patentansprüchen 1 bis 5, dadurch gekennzeichnet, daß die Legierung durch6.) Wear-resistant cast iron alloy according to claims 1 to 5, characterized in that the alloy by ο οο ο Glühen oberhalb 7oo C, durch Abschrecken auf unter 5oo C und anschließend durch Anlassen bis zu einer Temperatur von 7oo C Wärme behandelt wird.Annealing above 700 C, by quenching to below 500 C and then treated by tempering up to a temperature of 700 C heat. FRIEDLICH GOETZE AKTIENGESELLSCHAFTFRIEDLICH GOETZE AKTIENGESELLSCHAFT 6 A Nr. 173/70 AV 6 A No. 173/70 AV VossieckVossieck S098-51/Q656S098-51 / Q656
DE19742428821 1974-06-14 1974-06-14 Wear-resistant cast iron alloy with lamellar to nodular graphite precipitation Expired DE2428821C3 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19742428821 DE2428821C3 (en) 1974-06-14 1974-06-14 Wear-resistant cast iron alloy with lamellar to nodular graphite precipitation
IT2275875A IT1037649B (en) 1974-06-14 1975-04-24 WEAR RESISTANT CAST IRON ALLOY WITH LAMELLAR GRAPHITE SEPARATION UNTIL NODULAR
FR7515849A FR2274703A1 (en) 1974-06-14 1975-05-21 GRAPHITE CAST IRON ALLOY FROM LAMELLAR TO NODULAR STATE, RESISTANT TO WEAR
GB2436775A GB1482724A (en) 1974-06-14 1975-06-06 Wear-resistant cast-iron alloy
SE7506829A SE430701B (en) 1974-06-14 1975-06-13 NUT PROTECTIVE MOLDING ALLOY

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742428821 DE2428821C3 (en) 1974-06-14 1974-06-14 Wear-resistant cast iron alloy with lamellar to nodular graphite precipitation

Publications (3)

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DE2428821A1 true DE2428821A1 (en) 1975-12-18
DE2428821B2 DE2428821B2 (en) 1977-02-24
DE2428821C3 DE2428821C3 (en) 1985-11-14

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DE (1) DE2428821C3 (en)
FR (1) FR2274703A1 (en)
GB (1) GB1482724A (en)
IT (1) IT1037649B (en)
SE (1) SE430701B (en)

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DE2844409A1 (en) * 1978-10-12 1980-04-30 Teves Thompson Gmbh Alloy cast iron for highly stressed parts, esp. engine piston rings - in which dispersion of vanadium carbide increases wear resistance without impairing notch toughness
DE2944128A1 (en) * 1979-11-02 1981-05-14 J. Wizemann Gmbh U. Co, 7000 Stuttgart Cast iron for IC engine cylinder liner - with addn. of copper, tin and boron to give wear and corrosion resistance
DE3139973A1 (en) * 1981-10-08 1983-04-28 Volkswagenwerk Ag, 3180 Wolfsburg Internal combustion engine cylinder consisting of a grey cast iron alloy
EP0080590A2 (en) * 1981-12-01 1983-06-08 Goetze Ag Wear-resistant cast iron containing spheroidal graphite, and process for its manufacture
US4545825A (en) * 1983-03-26 1985-10-08 Mazda Motor Corporation Apex seals for high power rotary piston engines
US4617069A (en) * 1983-03-14 1986-10-14 Georg Fischer Aktiengesellschaft Method for improving the immunity to temperature changes of cast iron containing lamellar graphite
DE3815832A1 (en) * 1987-05-11 1988-11-24 Akebono Brake Ind ALLOY FOR BRAKE DISCS
EP0726327A1 (en) * 1994-12-05 1996-08-14 Maschinenfabrik & Eisengiesserei Ed. Mezger AG. Sole for brake shoes and process for manufacturing the same
DE19525862A1 (en) * 1995-07-15 1997-01-16 Ae Goetze Gmbh Mechanical seal for the tracks of caterpillars
EP0829551A2 (en) * 1996-09-11 1998-03-18 Harzer Graugusswerke GmbH Cast-iron alloy for heat resistant motor parts
DE19644204A1 (en) * 1996-10-24 1998-04-30 Klein Schanzlin & Becker Ag Material for sliding machine parts
US6053990A (en) * 1994-09-09 2000-04-25 Ab Volvo Perlitic grey iron for brake components
US6485026B1 (en) * 2000-10-04 2002-11-26 Dana Corporation Non-stainless steel nitrided piston ring, and method of making the same
DE10233732A1 (en) * 2002-07-24 2004-02-05 Georg Fischer Fahrzeugtechnik Ag Cast iron alloy
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DE2428821B2 (en) 1977-02-24
DE2428821C3 (en) 1985-11-14
GB1482724A (en) 1977-08-10
IT1037649B (en) 1979-11-20
FR2274703A1 (en) 1976-01-09
SE430701B (en) 1983-12-05
FR2274703B1 (en) 1980-03-28

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