EP1834005B1 - Alliage coule nodulaire et procede pour produire des pieces coulees a partir de cet alliage coule nodulaire - Google Patents

Alliage coule nodulaire et procede pour produire des pieces coulees a partir de cet alliage coule nodulaire Download PDF

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Publication number
EP1834005B1
EP1834005B1 EP05803315A EP05803315A EP1834005B1 EP 1834005 B1 EP1834005 B1 EP 1834005B1 EP 05803315 A EP05803315 A EP 05803315A EP 05803315 A EP05803315 A EP 05803315A EP 1834005 B1 EP1834005 B1 EP 1834005B1
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EP
European Patent Office
Prior art keywords
weight
spheroidal
alloy according
cast alloy
cast
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Expired - Lifetime
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EP05803315A
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German (de)
English (en)
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EP1834005A1 (fr
Inventor
Werner Menk
Rolf Rietzscher
Andreas Hecker
Torsten Rieck
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Georg Fischer Automotive AG
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Georg Fischer Automotive AG
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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

Definitions

  • the invention relates to a nodular cast iron alloy for cast iron products having a high mechanical strength, a high wear resistance and at the same time a high toughness, comprising as non-iron components C, Si, P, Mg, Cr, Al, S, B, Cu, Mn and usual impurities.
  • a cast iron alloy with as non-iron constituents 1.0 to 2.5 wt.% C, 1.5 to 3.2 wt.% Si, less than 1.15 wt.% Mn, less than 0.5 wt.% S and 0.001 to 0.05 wt.% B known.
  • the graphite part is formed in a compact form. Because the alloy does not contain any Mg, nodular graphite or vermicular graphite, it has predominantly a graphite formation that looks similar to the tempered carbon knot of malleable cast iron.
  • the alloy contains 5 to 10% carbides in a predominantly pearlitic matrix, with the result that the elongation at break is relatively low.
  • To limit the formation of lamellar graphite and thus the To improve modulus of elasticity are added as alloying elements tellurium and bismuth. Higher fracture strain values are achieved by a subsequent heat treatment.
  • another cast iron alloy which preferably contains 3.7% by weight of C, 2.5% by weight of Si, 1.85% by weight of Ni, 0.85% by weight of Cu and 0.05% by weight of Mo.
  • This material is characterized by an elongation of 20 to 16% at a tensile strength of 500 to 900 MPa and a Brinell hardness of 180 to 290 HB.
  • These properties are achieved after a time-consuming heat treatment, which comprises in succession: 10 to 360 minutes austenitizing at temperatures between 750 and 790 ° C, rapid cooling in a salt bath at a temperature between 300 and 400 ° C, 1 to 3 hours annealing at Temperatures between 300 and 400 ° C and cooling to room temperature.
  • the material has a structure with an austenitic and ferritic microstructure.
  • the material is characterized by a lighter machinability than a cast iron, which was subjected in the usual way to an austempering.
  • nodular cast iron alloy for cast iron products with plastic ductility known, 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 the 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%.
  • a nodular cast iron alloy for cast iron products having a high mechanical strength, a high wear resistance and at the same time a high toughness, comprising as non-iron components C, Si, P, Mg, Cr, Al, S, B, Cu, Mn and the usual Impurities according to claim 1, wherein the alloy contains 3.0 to 3.7% by weight C, 2.6 to 3.4% by weight Si, 0.02 to 0.05% by weight P, 0.025 to 0.045% by weight.
  • % Mg 0.01 to 0.03 wt% Cr, 0.003 to 0.017 wt% Al, 0.0005 to 0.012 wt% S, and 0.0004 to 0.002 wt% B, 0.1 to 1.5 %
  • Cu preferably 0.5 to 0.8% by weight of Cu and 0.1 to 1.0% by weight of Mn, preferably 0.15 to 0.2% by weight of Mn, balance Fe and unavoidable impurities.
  • the alloy has the best possible strength-elongation behavior. This is achieved by the nodular cast iron alloy containing 0.1 to 1.5 wt.% Cu, preferably 0.5 to 0.8 wt.% Cu. This is also achieved by the alloy containing 0.1 to 1.0 wt% Mn, preferably 0.15 to 0.2 wt% Mn.
  • the alloy has the best possible wear behavior. This is achieved in that the alloy 0.1 to 1.5 wt.% Cu, preferably 0.5 to 0.8 wt.% Cu and 0.1 to 1.0 wt.% Mn, preferably 0.15 to 0.2 wt.% Mn. This is also achieved by the alloy being 0.1 to 1.5 wt% Mn, preferably 0.5 to 1.0 wt% Mn, and 0.05 to 1.0 wt% Cu, preferably 0.05 contains up to 0.2 wt.% Cu.
  • the core idea of the invention is to specify a cast iron alloy which has a Brinell hardness of more than 220 and which is worn as uniformly as possible when used as a brake disk.
  • Lamellar graphite discs are inexpensive, but have less resistance to temperature changes. This can lead to so-called fire cracks after a short period of use, which continue to grow rapidly and lead to uneven surfaces. An uneven surface in turn leads to uneven temperature loading, irregular wear and so-called Bremsrubbeln.
  • axle and chassis parts for trucks and passenger cars such as wishbones, wheel and pivot bearings, which are exposed to high mechanical and dynamic loads and which must deform plastically in the event of a collision of the motor vehicle and must not break.
  • a brake disk was manufactured from the ductile iron alloy according to the invention.
  • the chemical composition was 3.34 wt.% C, 2.92 wt.% Si, 0.62 wt.% Cu, 0.17 wt.% Mn, 0.038 wt.% Mg, 0.025 wt.% P, 0.021 wt % Cr, 0.01% by weight Al, 0.001% by weight S and 0.0008% by weight B, remainder Fe and the usual impurities.
  • the brake disk was tested for spherulite number, graphite content, graphite shape and graphite size, perlite content and Brinell hardness. Samples from the brake disc were subjected to a tensile test to determine the strength-elongation behavior.
  • the Spärolitheniere is 384 +/- 76 spherulites per mm 2 .
  • the graphite content 9.7 +/- 0.7%.
  • the graphite mold according to DIN EN ISO 945 is 97.9% of the form VI.
  • the size distribution according to DIN EN ISO 945 is 45% of the size 8, 42% of the size 7 and 13% of the size 6.
  • the perlite content is 84 +/- 1%.
  • the Brinell hardness is 248 +/- 3 HB.
  • Tensile strength R p 0.2 474 MPa
  • tensile strength Rm 778 MPa
  • elongation at break A5 11.4%
  • elastic modulus E 165 to 170 kN / mm 2 .
  • FIG. 1 is the weight gain in grams per square meter and day shown by oxidation at 700 ° C in air.
  • the inventive material shows a weight gain of about 9 g / m 2 .d compared to a cast iron material for conventional brake discs with a weight gain of about 21 g / m 2 .D.
  • the fire cracking tests were conducted as follows: A 40 x 20 x 7 mm sample is subjected to at least 100 cycles consisting of heating to 700 ° C for 7 seconds and quenching in water for 6 seconds. Then cross-sections are made and examined under the microscope and photographed.
  • FIG. 2 is a microfoto of a commercial brake disc with a fire crack of 0.4 mm depth shown.
  • FIG. 3 is another microfoto of the inventive brake disc at the same magnification shown with a fire crack of 0.14 mm depth.
  • a wishbone for passenger cars was made from the nodular cast iron alloy according to the invention.
  • the chemical composition was 3.5% by weight of C, 2.85% by weight of Si, 0.63% by weight of Cu, 0.18% by weight of Mn, 0.038% by weight of Mg, 0.026 wt.% P, 0.029 wt.% Cr, 0.004 wt.% Al, 0.001 wt.% S and 0.0007 wt.% B, remainder Fe and the usual impurities.
  • Tensile strength R p 0.2 465 MPa
  • tensile strength Rm 757 Mpa
  • elongation at break A5 11.1%
  • modulus of elasticity E 165 to 170 kN / mm 2 .
  • the Brinell hardness is 258 +/- 3 HB.
  • a wheel carrier for passenger cars was manufactured from the ductile iron alloy according to the invention.
  • the chemical composition was 3.43 wt.% C, 3.38 wt.% Si, 0.71 wt.% Cu, 0.2 wt.% Mn, 0.037 wt.% Mg, 0.047 wt.% P, 0.043 wt % Cr, 0.012 wt.% Al, 0.004 wt.% S and 0.0008 wt.% B, balance Fe and the usual impurities.
  • Tensile strength R p 0.2 558 MPa
  • tensile strength Rm 862 MPa
  • elongation at break A5 6.1%.
  • the Brinell hardness is 288 HB.
  • the number of spherulites in the microstructure was found to be 455 spherulites per mm 2 .
  • FIG. 4 the elongation at break A5 is shown as a function of the tensile strength Rm.
  • the solid line indicates the minimum values according to standard EN 1563 for ductile iron castings of as-cast grades.
  • the measurements of the inventive material are listed according to the above examples 1 to 3.
  • FIG. 5 the elongation at break A5 in function of the yield strength R p 0.2 is shown.
  • the solid line indicates the minimum values according to standard EN 1563 for spheroidal graphite cast iron of as-cast grades.
  • the measurements of the inventive material are listed according to the above examples 1 to 3.
  • FIG. 6 shows the strength ranges with respect to the elongation at fracture of the materials aluminum casting alloys, ductile iron, ADI and the inventive material with the registered examples 1 to 3.
  • the uniformity of the structure is also achieved by a new casting process.
  • the mold is divided horizontally instead of vertically, with the brake discs are arranged horizontally and the filling of the mold is carried out from the center to the edge of the brake disc. This has the consequence that the mold is filled rotationally symmetrical and that the brake disc cools evenly after casting from inside to outside. This creates over the entire circumference of the brake disc a uniform, homogeneous structure. Subsequent heat treatment, which is time consuming and incurs costs, is no longer required.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Braking Arrangements (AREA)
  • Forging (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Heat Treatment Of Articles (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Claims (17)

  1. Alliage coulé nodulaire pour produits de fonte présentant une haute résistance mécanique, une haute résistance à l'usure et en même temps une ténacité élevée, contenant, comme composants non ferreux, C, Si, P, Mg, Cr, Al, S, B, Cu, Mn et les impuretés habituelles, caractérisé en ce que l'alliage coulé nodulaire contient 3,0 à 3,7 % en poids C, 2,6 à 3,4 % en poids Si, 0,02 à 0,05 % en poids P, 0,025 à 0,045 % en poids Mg, 0,01 à 0,03 % en poids Cr, 0,003 à 0,017 % en poids Al, 0,0005 à 0,009 % en poids S, 0,0004 à 0,002 % en poids B, 0,1 à 1,5 % en poids Cu, de préférence 0,5 à 0,8 % en poids Cu et 0,1 à 1,0 % en poids Mn, de préférence 0,15 à 0,2 % en poids Mn, le reste étant du fer et des impuretés inévitables.
  2. Alliage coulé nodulaire selon la revendication 1, caractérisé en ce que l'alliage contient 0,1 à 1,5 % en poids Mn, de préférence 0,5 à 1,0 % en poids Mn et 0,05 à 1,0 % en poids Cu, de préférence 0,05 à 0,2 % en poids Cu.
  3. Alliage coulé nodulaire selon la revendication 1 ou 2, caractérisé en ce que la part de graphite est mise sous forme de sphères et/ou de petits vers, à raison de plus de 90 % du graphite présent, immédiatement après la coulée et le refroidissement.
  4. Alliage coulé nodulaire selon au moins une des revendications 1 à 3, caractérisé en ce que la structure cristalline de la pièce coulée est rendue perlitique à raison de 70 à 90 % immédiatement après la coulée et le refroidissement.
  5. Alliage coulé nodulaire selon au moins une des revendications 1 à 4, caractérisé en ce que la structure cristalline de la pièce coulée présente 200 à 700 sphérolithes par mm2 immédiatement après la coulée et le refroidissement.
  6. Alliage coulé nodulaire selon au moins une des revendications 1 à 5, caractérisé en ce que la pièce coulée présente une dureté Brinell de plus de 220.
  7. Alliage coulé nodulaire selon au moins une des revendications 1 à 6, caractérisé en ce que les particules de graphite présentent une répartition de taille d'au moins 30 % de la taille 8, 10 % à 70 % de la taille 7 et au maximum 20 % de la taille 6 selon la norme DIN EN ISO 945.
  8. Alliage coulé nodulaire selon au moins une des revendications 1 à 7, caractérisé en ce que la pièce coulée présente un allongement à la rupture A5 de 5 à 14 % pour une résistance à la traction Rm de 900 à 600 MPa.
  9. Alliage coulé nodulaire selon au moins une des revendications 1 à 8, caractérisé en ce que la pièce coulée présente un allongement à la rupture A5 de 5 à 14 % pour une limite élastique RP 0,2 de 600 à 400 MPa.
  10. Utilisation d'un alliage coulé nodulaire selon au moins une des revendications 1 à 9 pour la fabrication de pièces du train de roulement dans des véhicules automobiles.
  11. Utilisation d'un alliage coulé nodulaire selon au moins une des revendications 1 à 9 pour la fabrication de bras oscillants transversaux dans des véhicules automobiles.
  12. Utilisation d'un alliage coulé nodulaire selon au moins une des revendications 1 à 9 pour la fabrication de supports de roue dans des véhicules automobiles.
  13. Utilisation d'un alliage coulé nodulaire selon au moins une des revendications 1 à 9 pour la fabrication de paliers pivotants dans des véhicules automobiles.
  14. Utilisation d'un alliage coule nodulaire selon au moins une des revendications 1 à 9 pour la fabrication de disques de frein dans des véhicules automobiles.
  15. Procédé pour la fabrication d'une pièce coulée en un alliage coulé nodulaire selon au moins une des revendications 1 à 9, caractérisé en ce que l'on n'effectue aucun traitement thermique de la pièce coulée après la coulée et le refroidissement de la pièce coulée.
  16. Procédé selon la revendication 15, caractérisé en ce que la pièce coulée est un disque de frein, le moule de coulée est divisé horizontalement et le disque de frein est agencé horizontalement dans le moule de coulée.
  17. Procédé selon la revendication 16, caractérisé en ce que le moule de coulée est rempli avec la symétrie de rotation à partir du point central du disque de frein.
EP05803315A 2004-11-22 2005-11-14 Alliage coule nodulaire et procede pour produire des pieces coulees a partir de cet alliage coule nodulaire Expired - Lifetime EP1834005B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200531148T SI1834005T1 (sl) 2004-11-22 2005-11-14 Sferoidna livna zlitina in postopek za pripravo ulitkov iz sferoidne livne zlitine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004056331A DE102004056331A1 (de) 2004-11-22 2004-11-22 Sphärogusslegierung und Verfahren zur Herstellung von Gussteilen aus der Sphärogusslegierung
PCT/EP2005/012160 WO2006056334A1 (fr) 2004-11-22 2005-11-14 Alliage coule nodulaire et procede pour produire des pieces coulees a partir de cet alliage coule nodulaire

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EP1834005A1 EP1834005A1 (fr) 2007-09-19
EP1834005B1 true EP1834005B1 (fr) 2010-08-18

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US (1) US8771589B2 (fr)
EP (1) EP1834005B1 (fr)
JP (1) JP5145047B2 (fr)
KR (1) KR100969840B1 (fr)
CN (1) CN100529135C (fr)
AT (1) ATE478164T1 (fr)
AU (1) AU2005309042B2 (fr)
BR (1) BRPI0518450B1 (fr)
CA (1) CA2579817C (fr)
DE (2) DE102004056331A1 (fr)
ES (1) ES2349414T3 (fr)
MX (1) MX2007005255A (fr)
PT (1) PT1834005E (fr)
SI (1) SI1834005T1 (fr)
WO (1) WO2006056334A1 (fr)
ZA (1) ZA200704658B (fr)

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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

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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
EP2471960B1 (fr) 2010-12-30 2014-06-18 Casa Maristas Azterlan Procédé d'élaboration de pièces en fonte à graphite sphéroïdal
JP6162364B2 (ja) * 2012-02-24 2017-07-12 株式会社リケン 高剛性球状黒鉛鋳鉄
CN102994860A (zh) * 2012-11-26 2013-03-27 俞虹 球墨铸铁合金制备方法
CN102994859A (zh) * 2012-11-26 2013-03-27 俞虹 球墨铸铁合金及制备方法
CN103572146A (zh) * 2013-11-04 2014-02-12 虞雪君 一种具有高耐磨性球墨铸铁合金
CN103572155A (zh) * 2013-11-04 2014-02-12 虞雪君 一种球墨铸铁合金
DE102014214640A1 (de) * 2014-07-25 2016-01-28 Ford Global Technologies, Llc Verfahren zur Herstellung eines Bauteils aus wärmebehandeltem Gusseisen
JP5952455B1 (ja) * 2015-03-30 2016-07-13 株式会社リケン 高剛性球状黒鉛鋳鉄
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
CN108085579A (zh) * 2016-11-21 2018-05-29 宜兴市帝洲新能源科技有限公司 一种机械设备的顶出杆材料
CN110484810A (zh) * 2019-08-26 2019-11-22 山东金麒麟股份有限公司 一种高负载性能的球墨铸铁、制作方法、用途及刹车盘
CN110863134B (zh) * 2019-11-29 2020-12-01 泛凯斯特汽车零部件(江苏)有限公司 采用球墨铸铁原料的铸件及其制造方法

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* 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

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BRPI0518450A2 (pt) 2008-11-18
JP2008520827A (ja) 2008-06-19
US20090047164A1 (en) 2009-02-19
CN100529135C (zh) 2009-08-19
SI1834005T1 (sl) 2010-12-31
AU2005309042A1 (en) 2006-06-01
ATE478164T1 (de) 2010-09-15
EP1834005A1 (fr) 2007-09-19
CA2579817A1 (fr) 2006-06-01
JP5145047B2 (ja) 2013-02-13
US8771589B2 (en) 2014-07-08
DE102004056331A1 (de) 2006-05-24
CN101072890A (zh) 2007-11-14
BRPI0518450B1 (pt) 2014-09-30
ZA200704658B (en) 2008-08-27
AU2005309042B2 (en) 2008-11-20
KR20070083790A (ko) 2007-08-24
KR100969840B1 (ko) 2010-07-13
WO2006056334A1 (fr) 2006-06-01
MX2007005255A (es) 2007-07-09
DE502005010119D1 (de) 2010-09-30
CA2579817C (fr) 2011-05-10
PT1834005E (pt) 2010-11-08
ES2349414T3 (es) 2011-01-03

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