EP0032282A1 - Verfahren zur Herstellung von Gusseisen mit Vermicular-Graphit und nach diesem Verfahren hergestelltes Gusseisen - Google Patents

Verfahren zur Herstellung von Gusseisen mit Vermicular-Graphit und nach diesem Verfahren hergestelltes Gusseisen Download PDF

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Publication number
EP0032282A1
EP0032282A1 EP80300136A EP80300136A EP0032282A1 EP 0032282 A1 EP0032282 A1 EP 0032282A1 EP 80300136 A EP80300136 A EP 80300136A EP 80300136 A EP80300136 A EP 80300136A EP 0032282 A1 EP0032282 A1 EP 0032282A1
Authority
EP
European Patent Office
Prior art keywords
graphite
cast iron
agent
iron
cast
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
Application number
EP80300136A
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English (en)
French (fr)
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EP0032282B1 (de
Inventor
Clifford Matthew Dunks
Geoffrey Mannion
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.)
Materials and Methods Ltd
Original Assignee
Materials and Methods Ltd
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 Materials and Methods Ltd filed Critical Materials and Methods Ltd
Priority to AT80300136T priority Critical patent/ATE14455T1/de
Priority to EP80300136A priority patent/EP0032282B1/de
Priority to DE8080300136T priority patent/DE3070892D1/de
Publication of EP0032282A1 publication Critical patent/EP0032282A1/de
Application granted granted Critical
Publication of EP0032282B1 publication Critical patent/EP0032282B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron

Definitions

  • This invention relates to a process for the manufacture of cast iron with vermicular graphite.
  • Vermicular graphite is a name given to flake graphite which has become rounded, thickened and shortened compared with the normal elongated flakes commonly found in grey cast irons.
  • This modified form of graphite is known by several other names including “compacted”, “quasi-flake”, “aggregate flake”, “chunky”, “stubby”, “up-graded”, “semi-nodular” “P-type” and "floccular” graphite.
  • the present invention provides a process for the production of cast iron with vermicular graphite wherein molten grey cast iron optionally containing a nodular graphite inhibitor is introduced into the mould cavity by way of a conventional pouring system which additionally includes one or more intermediate chambers containing a vermicularising agent in an amount sufficient to convert the graphite at least in part to vermicular graphite under the process conditions employed.
  • vermicularizing agent used herein we mean an agent which is in general an alloy but can be a metal and which leads to vermicular graphite, under appropriate process conditions.
  • the formation of vermicular graphite depends to a certain extent on the process conditions, as is well known in the art, which process conditions are for example described in U.K. Patent Specification 1,427,445.
  • the vermicularizing agent will be a magnesium-containing alloy.
  • This alloy may contain a metal, such as, titanium which will inhibit the production of nodular graphite.
  • This titanium may also be added as ferrotitanium to the metal in the ladle prior to pouring. It may also inherently be present in the iron which makes up the charge.
  • vermicular graphite is obtained when the magnesium level in the finished metal is below 0.02 to 0.025% by weight based on the weight of the iron.
  • a nodular- graphite inhibiting metal in particular titanium, but also zirconium higher levels of magnesium may be tolerated.
  • a particularly useful additive in the vermicularizing alloy is cerium.
  • the vermicularizing agent may therefore be magnesium in the form of a 5% magnesium ferrosilicon alloy containing cerium.
  • a suitable base iron for the grey iron charge, excluding carbon, is:-
  • the size of the intermediate chamber, the pouring rate of the molten grey iron and the amount of magnesium retained in the cast metal may be determined according to the relationship defined in our U.K. Patent Specification Serial No. 1,511,246.
  • the total area of the base or bases of the chamber or chambers are equal to a "factor" x (metal pouring rate) x (total concentration of the agent in the cast metal, expressed as a proportion of the weight of the cast metal).
  • the "factor” is the reciprocal of the constant "k” as defined in Specification No. 1,511,246 and is dependent on the physical form and chemical composition of the agent, preferably magnesium as described in detail in U.K. Patent Specification 1,511,246.
  • the required amount of magnesium can be calculated with great accuracy.
  • the factor can then be determined.
  • the structure obtained is generally not totally vermicular graphite but is about 80% to 90% vermicular.
  • molten metal containing a nodular graphite inhibitor enters the mould system by way of a pouring bush (not shown) down a downsprue 1 and into a reaction chamber 2 which contains the vermicularizing agent.
  • a gate 3 regulates the outflow of metal from the chamber thereby ensuring a sufficient residence time for the metal in the chamber for reaction with the vermicularizing agent therein. From the gate 3 the treated molten metal flows via a runner 4 and ingate e.g. 5, to the remainder of the system comprising a riser and the mould cavity proper (not shown).
  • molten iron containing a nodular graphite inhibitor passes into the casting mould it contacts the vermicularizing additive in the intermediate reaction chamber 2 and the graphite in the iron is converted into vermicular form.
  • the present invention is further illustrated by the following Example which was carried out using a mould system as described above.
  • the disc casting size was 50.8 cms (20 inches) x 2.54 cms (1.0 inch) and the pouring time was ten seconds.
  • the intermediate chamber contained a vermicularising agent consisting of an alloy comprising 5% magnesium, 0.3 to 0.5% calcium, 0.2% cerium, 45-50% silicon with the balance being iron.
  • the process parameters were selected to give a controlled magnesium content of 0.015%.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
EP80300136A 1980-01-15 1980-01-15 Verfahren zur Herstellung von Gusseisen mit Vermicular-Graphit und nach diesem Verfahren hergestelltes Gusseisen Expired EP0032282B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT80300136T ATE14455T1 (de) 1980-01-15 1980-01-15 Verfahren zur herstellung von gusseisen mit vermicular-graphit und nach diesem verfahren hergestelltes gusseisen.
EP80300136A EP0032282B1 (de) 1980-01-15 1980-01-15 Verfahren zur Herstellung von Gusseisen mit Vermicular-Graphit und nach diesem Verfahren hergestelltes Gusseisen
DE8080300136T DE3070892D1 (en) 1980-01-15 1980-01-15 Process for manufacture of cast iron with vermicular graphite and cast iron so produced

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80300136A EP0032282B1 (de) 1980-01-15 1980-01-15 Verfahren zur Herstellung von Gusseisen mit Vermicular-Graphit und nach diesem Verfahren hergestelltes Gusseisen

Publications (2)

Publication Number Publication Date
EP0032282A1 true EP0032282A1 (de) 1981-07-22
EP0032282B1 EP0032282B1 (de) 1985-07-24

Family

ID=8187077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80300136A Expired EP0032282B1 (de) 1980-01-15 1980-01-15 Verfahren zur Herstellung von Gusseisen mit Vermicular-Graphit und nach diesem Verfahren hergestelltes Gusseisen

Country Status (3)

Country Link
EP (1) EP0032282B1 (de)
AT (1) ATE14455T1 (de)
DE (1) DE3070892D1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3321312A1 (de) * 1983-06-13 1984-12-13 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur herstellung eines gusseisens mit vermiculargraphit
EP0249897A1 (de) * 1986-06-11 1987-12-23 O.E.T.-METALCONSULT S.r.l. Verfahren zum Entgasen, Feinen oder Filtern von flüssigen Metallen und Legierungen, sowie die entsprechende Vorrichtung
WO2001054844A1 (en) * 2000-01-26 2001-08-02 Novacast Ab Gating system
EP1458518A2 (de) * 2001-11-27 2004-09-22 Tupy Fundiçoes Ltda. Graphitgusseisen hoher mechanischer festigkeit
EP3519602A4 (de) * 2016-09-29 2020-04-01 Tupy S.A. Vermiculargusseisenlegierung für verbrennungsmotorblock und -kopf

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH665851A5 (de) * 1986-03-20 1988-06-15 Fischer Ag Georg Verfahren zur herstellung von perlitischen gusseisensorten.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069058A (en) * 1965-05-04 1967-05-17 Int Nickel Ltd Cast iron
GB1278265A (en) * 1968-07-17 1972-06-21 Materials & Methods Ltd Improved process for the manufacture of nodular cast iron
GB1427445A (en) * 1974-01-15 1976-03-10 British Cast Iron Res Ass Cast iron
DE2705630A1 (de) * 1976-02-10 1977-08-11 Bcira Co Verfahren zur behandlung einer kohlenstoffhaltigen eisenschmelze
GB1511246A (en) * 1974-04-29 1978-05-17 Materials & Methods Ltd Process for the manufacture of cast iron

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2926020A1 (de) * 1979-06-28 1981-01-08 Buderus Ag Verfahren zur herstellung eines gusseisens mit vermicular-grafit und verwendung des gusseisens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1069058A (en) * 1965-05-04 1967-05-17 Int Nickel Ltd Cast iron
GB1278265A (en) * 1968-07-17 1972-06-21 Materials & Methods Ltd Improved process for the manufacture of nodular cast iron
GB1427445A (en) * 1974-01-15 1976-03-10 British Cast Iron Res Ass Cast iron
GB1511246A (en) * 1974-04-29 1978-05-17 Materials & Methods Ltd Process for the manufacture of cast iron
DE2705630A1 (de) * 1976-02-10 1977-08-11 Bcira Co Verfahren zur behandlung einer kohlenstoffhaltigen eisenschmelze

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GIESSEREI, Vol. 66, No. 15, 23 July 1979, Dusseldorf, * Page 590, right column, lines 30 to 60 * *
GIESSEREI-PRAXIS, No. 23-24, 1979 Berlin J.B. v. NESSELRODE "Gusseisen mit Vermiculargraphit, ein Werkstoff fur Zylinderkopfe" pages 445 to 449 * page 446 * *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3321312A1 (de) * 1983-06-13 1984-12-13 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur herstellung eines gusseisens mit vermiculargraphit
EP0131092A2 (de) * 1983-06-13 1985-01-16 Klöckner-Humboldt-Deutz Aktiengesellschaft Verfahren zur Herstellung eines Gusseisens mit Vermiculargraphit
EP0131092A3 (de) * 1983-06-13 1986-09-10 Klöckner-Humboldt-Deutz Aktiengesellschaft Verfahren zur Herstellung eines Gusseisens mit Vermiculargraphit
EP0249897A1 (de) * 1986-06-11 1987-12-23 O.E.T.-METALCONSULT S.r.l. Verfahren zum Entgasen, Feinen oder Filtern von flüssigen Metallen und Legierungen, sowie die entsprechende Vorrichtung
WO2001054844A1 (en) * 2000-01-26 2001-08-02 Novacast Ab Gating system
US6863114B2 (en) 2000-01-26 2005-03-08 Novacast Ab Gating system
EP1458518A2 (de) * 2001-11-27 2004-09-22 Tupy Fundiçoes Ltda. Graphitgusseisen hoher mechanischer festigkeit
EP1458518A4 (de) * 2001-11-27 2004-12-15 Tupy Fundicoes Ltda Graphitgusseisen hoher mechanischer festigkeit
EP3519602A4 (de) * 2016-09-29 2020-04-01 Tupy S.A. Vermiculargusseisenlegierung für verbrennungsmotorblock und -kopf

Also Published As

Publication number Publication date
EP0032282B1 (de) 1985-07-24
ATE14455T1 (de) 1985-08-15
DE3070892D1 (en) 1985-08-29

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