EP1270747B1 - Fonte à graphite sphéroidal - Google Patents

Fonte à graphite sphéroidal

Info

Publication number
EP1270747B1
EP1270747B1 EP02006104A EP02006104A EP1270747B1 EP 1270747 B1 EP1270747 B1 EP 1270747B1 EP 02006104 A EP02006104 A EP 02006104A EP 02006104 A EP02006104 A EP 02006104A EP 1270747 B1 EP1270747 B1 EP 1270747B1
Authority
EP
European Patent Office
Prior art keywords
cast iron
products
alloy
nodular cast
iron alloy
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
EP02006104A
Other languages
German (de)
English (en)
Other versions
EP1270747A2 (fr
EP1270747A3 (fr
Inventor
Werner Menk
Dirk Lindemann
Dirk Richarz
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.)
Georg Fischer Fahrzeugtechnik AG
Georg Fischer Automotive AG
Original Assignee
Georg Fischer Fahrzeugtechnik AG
Georg Fischer Automotive 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 Georg Fischer Fahrzeugtechnik AG, Georg Fischer Automotive AG filed Critical Georg Fischer Fahrzeugtechnik AG
Publication of EP1270747A2 publication Critical patent/EP1270747A2/fr
Publication of EP1270747A3 publication Critical patent/EP1270747A3/fr
Application granted granted Critical
Publication of EP1270747B1 publication Critical patent/EP1270747B1/fr
Priority to CY20061101779T priority Critical patent/CY1107543T1/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron
    • C21D5/02—Heat treatments of cast-iron improving the malleability of grey cast-iron
    • 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
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/30—Stress-relieving
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like

Definitions

  • the invention relates to a nodular cast iron alloy for cast iron products having plastic ductility, wherein the nodular cast iron alloy contains as non-iron constituents at least the elements C, Si, Mn, Cu, Mg, S and as admixtures of one or more elements from group IIIb of the periodic table.
  • Spheroidal cast iron alloys are used in automotive engineering for the production of cast parts which have to withstand high impact loads, for example transverse links, as parts of the wheel suspension of the driven wheels, which still have to remain intact even after an accident.
  • the castings may be deformed in the so-called crash test, but not break.
  • Commercially available gray cast iron alloys tend to break when subjected to heavy blows.
  • a process for the production of ductile iron alloys with product inclusions is known, which are plastically deformed during the machining of the products produced.
  • the plastically deformable inclusions serve as a lubricant during machining.
  • the inclusions consist of about 50% SiO 2 , 25% CaO, 15% MgO and 10% Al 2 O 3 .
  • the base alloy is made low in sulfur and deoxygenated with a reagent containing CaC 2 , CaO, Ca, Al and Mg prior to the actual treatment with magnesium. A metal analysis of the products thus produced is not disclosed.
  • GB-A-832666 discloses iron alloys containing carbon, silicon and boron.
  • the alloys do not contain magnesium, whereby the graphite formation is not spherical, but compact or lamellar. Higher elongation values are only achieved after a subsequent heat treatment.
  • the alloys are treated with bismuth and tellurium and exhibit a predominantly pearlitic matrix, which can be refined after the subsequent heat treatment, but does not disappear.
  • a cylinder liner for an internal combustion engine is known.
  • the structure has Zementit- / Steaditanteile in a pearlitic matrix, resulting in a low plastic deformability results.
  • a nodular cast iron alloy for cast iron products having plastic ductility the nodular cast iron alloy containing as non-iron constituents at least the elements C, Si, Mn, Cu, Mg, S and as admixtures of one or more elements from group IIIb of the periodic table, wherein the alloy contains as admixture at least the element boron and wherein the Si content is more than 2.4%.
  • the Perlitanteil is reduced in the structure of the cast iron products and that a ferritic microstructure can be ensured. This is achieved by the alloy containing 2 to 200 ppm boron as admixture.
  • the core idea of the invention is to provide a cast iron alloy which is particularly suitable for load-bearing parts, for example for the suspension in the automotive industry.
  • the load-bearing parts must not break but only deform.
  • the deformation should not be elastic but plastic.
  • the deformability of the parts should be plastic and as large as possible, should not lead to breakage of the parts and should not be reversible.
  • a control arm for a front wheel suspension of a nodular cast iron passenger car having the following chemical composition: 3.5% C, 2.7% Si, 0.16% Mn, 0.06% Cu, 0.043% Mg, 0.002% S, 200 ppm sum of the elements from group IIIb of the periodic table (B, Al, Ga, In, TI), has a structure with a maximum of 15% perlite.
  • the graphite formation in the microstructure measured according to the standard DIN EN ISO 945, is more than 90% Form VI, and the size of the graphite spheres in the microstructure is in the classes 7-8.
  • composition and the. Properties of the casting are compared with a conventional spheroidal cast alloy called GJS-400-15.
  • This composition can be illustrated by the measurement results of an instrumented impact test. This impact test is performed as a simulation for the wheel suspension abuse test Passenger car.
  • the suspension still carries the passenger car after a collision so far that the passenger car can be driven to the next workshop.
  • the supporting part of the suspension such as the wishbone, which was permanently and irreversibly deformed by the collision, but is still unbreakable and stable, must be replaced.
  • Diagram 1 shows the measurement results of the impact tests on a wishbone of a passenger car on the right side. As comparison values are shown in the diagram 1 on the left side, the measurement results of an identical casting, which was made of commercially available nodular cast iron. From diagram 1 it can be seen that the total energy consumption in the control arm during the impact test is more than 2200 J. It can also be seen from diagram 1 that the deformation value in the impact test is more than 75% higher than in the case of a comparable casting made from a conventional nodular cast iron alloy. The deformation of the wishbone, expressed in mm, measured as the difference between two measuring points on the casting, before and after the impact test, is more than 15 mm. For comparable castings from a conventional ductile iron alloy, this deformation is usually less than 9 mm. The maximum force absorbed by the wishbone is between 3000 and 3500 kN. The instrumented impact test is performed on a Rosand impact tester.
  • Wishbone for a passenger car which are made of the inventive nodular cast iron alloy with at least 2.4% Si content and at least the element boron as admixture, and which are subjected to the casting cleaning as gentle as possible surface treatment, are characterized by a high plastic non-reversible Deformability.
  • the load-bearing parts of the suspension of an automobile break during the crash test, which simulates a particular accident situation, not and remain intact.
  • the present cast alloy is also suitable for all other vehicle parts that may deform under extreme loads, but may not break.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)
  • Valve Housings (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Forging (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (6)

  1. Alliage en fonte à graphite sphéroïdal pour produits en fonte de fer ayant une aptitude à la déformation plastique, l'alliage en fonte à graphite sphéroïdal contenant, en tant que constituants non ferreux, tout au moins les éléments C, Si, Mn, Mg, S, et en tant qu'addition, un ou plusieurs éléments du groupe IIIb du système périodique, caractérisé en ce que l'alliage contient 3,5% de C, 2,6 à 2,9% de Si, 0,16% de Mn, 0,06% de Cu, 0,043% de Mg, 0,002% de S, et en tant qu'addition, en tout de 2 à 200 ppm des éléments du groupe IIIb du système périodique (B, Al, Ga, In, Tl), le reste étant du Fe, et en ce que l'alliage présente une structure de réseau ayant 15% au maximum de perlite.
  2. Alliage en fonte à graphite sphéroïdal pour produits en fonte de fer ayant une aptitude à la déformation plastique selon la revendication 1, caractérisé en ce que la déformation plastique des produits est irréversible et durable conformément à un essai de résistance aux chocs par voie instrumentale.
  3. Alliage en fonte à graphite sphéroïdal pour produits en fonte de fer ayant une aptitude à la déformation plastique selon la revendication 1 ou la revendication 2, caractérisé en ce que l'absorption d'énergie des produits dans l'essai de résistance aux chocs par voie instrumentale se situe au moins à un niveau de 35% plus haut que dans le cas de produits en fonte de fer comparables, faits à partir d'alliages en fonte à graphite sphéroïdal classiques, de telle manière que les produits soient résistants à la rupture.
  4. Procédé en vue de la fabrication de produits en fonte de fer à partir d'un alliage en fonte à graphite sphéroïdal ayant une aptitude à la déformation plastique selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les produits en fonte de fer sont soumis, après le procédé de coulée, à un traitement subséquent, qui est particulièrement ménageant pour les surfaces des produits, le traitement subséquent ménageant des surfaces comprenant un recuit pauvre en contraintes et/ou un grenaillage à l'aide de particules faiblement abrasives.
  5. Utilisation de l'alliage de fonte à graphite sphéroïdal selon l'une quelconque des revendications 1 à 3 en vue de la fabrication d'un bras de suspension, résistant à la rupture, déformable de manière irréversible et durable.
  6. Bras de suspension selon la revendication 5, caractérisé en ce que, dans l'essai de résistance aux chocs par voie instrumentale, la valeur de déformation après la déformation plastique est au moins de 15 mm.
EP02006104A 2001-06-20 2002-03-19 Fonte à graphite sphéroidal Expired - Lifetime EP1270747B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CY20061101779T CY1107543T1 (el) 2001-06-20 2006-12-11 Κραμα χυτοσιδηρου σφαιροειδους γραφιτη

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10129382 2001-06-20
DE10129382A DE10129382A1 (de) 2001-06-20 2001-06-20 Sphärogusslegierung

Publications (3)

Publication Number Publication Date
EP1270747A2 EP1270747A2 (fr) 2003-01-02
EP1270747A3 EP1270747A3 (fr) 2004-01-02
EP1270747B1 true EP1270747B1 (fr) 2006-10-04

Family

ID=7688591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02006104A Expired - Lifetime EP1270747B1 (fr) 2001-06-20 2002-03-19 Fonte à graphite sphéroidal

Country Status (10)

Country Link
US (1) US6861029B2 (fr)
EP (1) EP1270747B1 (fr)
AT (1) ATE341650T1 (fr)
BR (1) BR0202323B1 (fr)
CY (1) CY1107543T1 (fr)
DE (2) DE10129382A1 (fr)
DK (1) DK1270747T3 (fr)
ES (1) ES2269539T3 (fr)
MX (1) MXPA02006048A (fr)
PT (1) PT1270747E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3243920A1 (fr) 2017-03-24 2017-11-15 Georg Fischer Automotive (Kunshan) Co Ltd. Alliage en fonte à graphite

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004056331A1 (de) * 2004-11-22 2006-05-24 Georg Fischer Fahrzeugtechnik Ag Sphärogusslegierung und Verfahren zur Herstellung von Gussteilen aus der Sphärogusslegierung
US20060292026A1 (en) * 2005-06-08 2006-12-28 Robert Eppich Cast iron alloy containing boron
SE531107C2 (sv) * 2006-12-16 2008-12-23 Indexator Ab Metod
US7846381B2 (en) * 2008-01-29 2010-12-07 Aarrowcast, Inc. Ferritic ductile cast iron alloys having high carbon content, high silicon content, low nickel content and formed without annealing
EP2319639A1 (fr) * 2009-11-10 2011-05-11 Georg Fischer Automobilguss GmbH Fusée d'essieu en fonte dotée d'un noyau d'acier coulé - procédé de fabrication de la fusée d'essieu
KR20140070647A (ko) * 2012-08-13 2014-06-10 가부시키가이샤 고마쓰 세이사쿠쇼 플로팅 시일
JP5938465B2 (ja) * 2012-08-13 2016-06-22 株式会社小松製作所 フローティングシール
EP3170578B1 (fr) * 2015-11-17 2021-06-30 GF Casting Solutions Kunshan Co. Ltd. Procédé de fabrication d'une pièce moulée en fonte à graphite sphéroïdal
US11820197B2 (en) 2022-02-09 2023-11-21 Honda Motor Co., Ltd. Vehicle control arm assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB832666A (en) * 1957-06-10 1960-04-13 Gen Motors Corp Improved ferrous metal and methods of producing the same
FR1193067A (fr) * 1958-03-05 1959-10-30 Bouchayer & Viallet Ets Perfectionnements aux fontes spéciales
DE2428822A1 (de) * 1974-06-14 1976-01-02 Goetzewerke Sphaerogusseisenlegierung mit erhoehter verschleissbestaendigkeit
FI101816B1 (fi) * 1991-07-27 1998-08-31 Man B & W Diesel Ag Polttomoottorikoneen sylinterin hylsy
JP3204293B2 (ja) * 1996-04-29 2001-09-04 日立金属株式会社 球状黒鉛鋳鉄部材の製造方法
JP3913935B2 (ja) * 1999-06-21 2007-05-09 本田技研工業株式会社 亜共晶球状黒鉛鋳鉄

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3243920A1 (fr) 2017-03-24 2017-11-15 Georg Fischer Automotive (Kunshan) Co Ltd. Alliage en fonte à graphite

Also Published As

Publication number Publication date
MXPA02006048A (es) 2003-08-20
ATE341650T1 (de) 2006-10-15
DE10129382A1 (de) 2003-01-02
CY1107543T1 (el) 2013-03-13
DE50208313D1 (de) 2006-11-16
BR0202323A (pt) 2003-04-08
US6861029B2 (en) 2005-03-01
EP1270747A2 (fr) 2003-01-02
PT1270747E (pt) 2007-01-31
US20020195180A1 (en) 2002-12-26
EP1270747A3 (fr) 2004-01-02
DK1270747T3 (da) 2007-02-05
ES2269539T3 (es) 2007-04-01
BR0202323B1 (pt) 2010-11-03

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