EP1865082A1 - Font à haut resistance à l'oxydation en temps elevés. - Google Patents

Font à haut resistance à l'oxydation en temps elevés. Download PDF

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Publication number
EP1865082A1
EP1865082A1 EP06011786A EP06011786A EP1865082A1 EP 1865082 A1 EP1865082 A1 EP 1865082A1 EP 06011786 A EP06011786 A EP 06011786A EP 06011786 A EP06011786 A EP 06011786A EP 1865082 A1 EP1865082 A1 EP 1865082A1
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EP
European Patent Office
Prior art keywords
cast iron
alloy
alloy according
iron alloy
magnesium
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.)
Withdrawn
Application number
EP06011786A
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German (de)
English (en)
Inventor
Leonhard F. Zeipper
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 Eisenguss GmbH
Original Assignee
Georg Fischer Eisenguss GmbH
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 Eisenguss GmbH filed Critical Georg Fischer Eisenguss GmbH
Priority to EP06011786A priority Critical patent/EP1865082A1/fr
Priority to CNA2007800208544A priority patent/CN101460641A/zh
Priority to RU2008152348/02A priority patent/RU2008152348A/ru
Priority to CA002653239A priority patent/CA2653239A1/fr
Priority to KR1020097000425A priority patent/KR20090037883A/ko
Priority to BRPI0712390-6A priority patent/BRPI0712390A2/pt
Priority to US12/303,857 priority patent/US20100178193A1/en
Priority to JP2009513632A priority patent/JP2009540115A/ja
Priority to PCT/EP2007/054506 priority patent/WO2007141108A1/fr
Publication of EP1865082A1 publication Critical patent/EP1865082A1/fr
Withdrawn legal-status Critical Current

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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
    • C22C37/10—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
    • C22C37/08—Cast-iron alloys containing chromium with nickel

Definitions

  • the invention relates to a cast iron alloy for cast iron products having a high oxidation resistance at high surface temperatures.
  • the alloy contains up to 3.4 wt% C, 3.5 to 5.5 wt% Si, to 0.6 wt% Mn, 0.1 to 0.7 wt% Cr, 0.3 to 0.9 wt.% Mo and up to 0.1 wt.% Of a spheroidal graphite-forming component.
  • the alloy is used to make turbocharger housings in automotive engineering.
  • the alloy consists of 2.5 to 2.8% by weight of C, 4.7 to 5.2% by weight of Si, 0.5 to 0.9% by weight of Mo, 0.5 to 0.9% by weight.
  • Al up to 0.04 wt.% Mg, up to 0.02 wt.% S, 0.1 to 1.0 wt.% Ni, 0.1 to 0.4 wt.% Zr, balance Fe and usual impurities.
  • the alloy is used for exhaust manifolds and turbocharger housings in automotive engineering.
  • This object is achieved by a cast iron alloy for cast iron products with a high oxidation resistance at surface temperatures of 800 to 950 ° C with the chemical constituents 2.8 to 3.6 wt.% C, 2.0 to 3.0 wt.% Si, 2 , 5 to 4.3 wt% Al, up to 1.0 wt% Ni, up to 0.8 wt% Mo, up to 0.3 wt% Mn, 0.002 to 0.1 wt% Ce , 0.023 to 0.06 wt.% Mg, up to 0.01 wt.% S, balance Fe and common impurities.
  • the castings stretch as regularly as possible elastically at the operating temperature.
  • the temperature of the ferritic to austenitic phase transformation of the alloy being above 880 ° C.
  • the thermal expansion of the alloy samples measured in the dilatometer is uniform and constant up to a temperature of 880 ° C.
  • the alloy having a thermal expansion coefficient of 8 to 12 10 -6 / K at 25 ° C and 13.5 to 15.5 10 -6 / K at 900 ° C.
  • the castings do not become brittle at room temperature.
  • the toughness of the cast iron alloy proposed here corresponds to the mean value of commercially available ferritic materials, which, however, can not be used at temperatures above 860 ° C.
  • the castings are easy to work. This is achieved by the alloy samples having a Brinell hardness of 220 to 250.
  • the alloy is composed of inexpensive elements as possible. This is achieved by the alloy containing less than 0.8 wt% Mo, less than 1 wt% Cr, and less than 1 wt% Ni.
  • Ni-resist alloys typically contain about 30 to 35 wt% Ni and about 2 to 5% Cr.
  • Ductile iron alloys alloyed with molybdenum normally contain about 0.8% by weight molybdenum.
  • the castings are thermally insensitive as possible. This is achieved by the alloy samples having a thermal conductivity of about 23 W / mK at 25 ° C. and a thermal conductivity of about 26 W / mK at 900 ° C. Ni-Resist alloys have a 20 to 50% lower thermal conductivity at 400 ° C.
  • the gist of the invention is to provide a cast iron alloy which permitting the highest possible service temperature with a high level of scale resistance in turbocharger housings and exhaust manifolds, as cost-effectively and as simply as possible in a casting process can be produced.
  • Previous standard solutions for higher operating temperatures are the use of more expensive cast steel and austenitic cast iron or in the use of more expensive to manufacture sheet metal structures.
  • An exhaust manifold for an internal combustion engine of a ductile iron passenger car having the following chemical composition in weight percent: 3.02 C, 2.96 Si, 2.53 Al, 0.79 Ni, 0.65 Mo, 0.23 Mn, 0.04 Cu, 0.031 P, 0.026 Cr, 0.023 Mg, 0.017 Ti, less than 0.01 S and 0.002 Ce has a ferritic microstructure.
  • the exhaust manifolds are poured directly into the molds from a melt which has been pretreated with magnesium in the GF converter. A subsequent time-consuming heat treatment such as solution annealing or tempering is not necessary.
  • the treatment with magnesium has a favorable influence on the sulfur content of the alloy and ensures the formation of the graphite in the spherical or vermicular form.
  • the Mg content of about 0.025 wt% is ideal at the present Al content of about 2.5 wt%.
  • the alloy samples have a specific gravity that is at least 5% lower than the specific gravity of conventional comparable cast iron alloys.
  • the carbon content of 2.8 to 3.6% by weight ensures a composition close to the eutectic. Less than 2.8% C is unfavorable for feeding the castings. More than 3.6% C is unfavorable to the high temperature properties of the alloy.
  • Cerium is added in amounts of 0.002 to 0.1% by weight as a nucleating agent. More than 0.1% Ce is unfavorable and leads to the formation of so-called chunky graphite.
  • the content of silicon of 2 to 3% by weight in the present alloy has a positive influence on the formation of the ferritic phase, improves the flowability of the melt, increases the yield strength and improves the heat resistance of the castings. Less than 2% Si is unfavorable to the depth of the wisdom radiation. More than 3% Si increases the brittleness of the castings.
  • the content of aluminum from 2.5 to 4.3 wt.% also has a positive influence on the formation of the ferritic phase and neutralizes the nitrogen. Less than 2.5% Al is unfavorable for graphite stabilization. More than 4.3% Al is unfavorable for the formation of spheroidal graphite.
  • the content of nickel of 0.1 to 1 wt.% Increases the yield strength without significantly increasing the brittleness and improves the corrosion resistance. Less than 0.1% Ni is unfavorable for graphite stabilization. More than 1% Ni is unfavorable for the formation of bainite and martensite in thinner areas of the castings. Nickel is a relatively expensive alloying element.
  • the content of molybdenum from 0.4 to 0.8% by weight has a positive influence on the increase in the yield strength, the heat resistance, the creep resistance and thus on the thermal shock resistance. Less than 0.4% Mo is unfavorable for graphite stabilization. More than 0.8% Mo is unfavorable for the formation of carbides and gas bubbles. Molybdenum is a very expensive alloying element.
  • the manganese content of up to 0.3% by weight has a positive influence on the setting of sulfur. More than 0.3% Mn is unfavorable for the formation of Grain boundary carbides and worsens the nucleation state. Too much Mn promotes the formation of perlite in the crystal structure. The bainitic structure is becoming increasingly brittle.
  • the chromium content of up to 1% by weight has a positive influence on the creep resistance and the heat resistance of the castings.
  • lower levels of the admixtures are beneficial in reducing the formation of grain boundary carbides and brittleness at room temperature. This is the case, for example, for the contents of copper and titanium.
  • melt temperatures of ductile iron are lower by 100 to 200 ° C. This means that less energy is consumed and that fewer alloying elements are released by evaporation to the environment.
  • Figure 1 shows the transformation from the ferritic to austenitic phases of the present alloy as a function of temperature. Here it can be seen how at about 900 ° C an equilibrium phase transformation takes place. It can also be seen here how the alloy changes its state of aggregation at a melting temperature of 1240 to 1280 ° C.
  • Figure 2 shows the coefficient of thermal expansion of the new alloy, designated SiMo1000plus, measured as a function of temperature, in comparison with other cast iron alloys.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Supercharger (AREA)
  • Exhaust Silencers (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
EP06011786A 2006-06-08 2006-06-08 Font à haut resistance à l'oxydation en temps elevés. Withdrawn EP1865082A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP06011786A EP1865082A1 (fr) 2006-06-08 2006-06-08 Font à haut resistance à l'oxydation en temps elevés.
CNA2007800208544A CN101460641A (zh) 2006-06-08 2007-05-10 在高温下具有良好氧化稳定性的铸铁合金
RU2008152348/02A RU2008152348A (ru) 2006-06-08 2007-05-10 Легированный литейный чугун, способ его получения и названный чугун для изготовления колена выхлопного трубопровода и/или корпуса турбонагнетателя
CA002653239A CA2653239A1 (fr) 2006-06-08 2007-05-10 Alliage de fonte avec bonne resistance a l'oxydation a hautes temperatures
KR1020097000425A KR20090037883A (ko) 2006-06-08 2007-05-10 높은 온도에서 양호한 내산화성을 갖는 주철 합금
BRPI0712390-6A BRPI0712390A2 (pt) 2006-06-08 2007-05-10 liga de ferro fundido com boa resistência à oxidação a altas temperaturas
US12/303,857 US20100178193A1 (en) 2006-06-08 2007-05-10 Cast iron alloy with good oxidation resistance at high temperatures
JP2009513632A JP2009540115A (ja) 2006-06-08 2007-05-10 高温耐酸化性に優れる鋳鉄合金
PCT/EP2007/054506 WO2007141108A1 (fr) 2006-06-08 2007-05-10 Alliage de fonte avec bonne résistance à l'oxydation à hautes températures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06011786A EP1865082A1 (fr) 2006-06-08 2006-06-08 Font à haut resistance à l'oxydation en temps elevés.

Publications (1)

Publication Number Publication Date
EP1865082A1 true EP1865082A1 (fr) 2007-12-12

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ID=37265690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06011786A Withdrawn EP1865082A1 (fr) 2006-06-08 2006-06-08 Font à haut resistance à l'oxydation en temps elevés.

Country Status (9)

Country Link
US (1) US20100178193A1 (fr)
EP (1) EP1865082A1 (fr)
JP (1) JP2009540115A (fr)
KR (1) KR20090037883A (fr)
CN (1) CN101460641A (fr)
BR (1) BRPI0712390A2 (fr)
CA (1) CA2653239A1 (fr)
RU (1) RU2008152348A (fr)
WO (1) WO2007141108A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160053351A1 (en) * 2013-05-14 2016-02-25 Toshiba Kikai Kabushiki Kaisha High-stength, high-damping-capacity cast iron
WO2016084021A1 (fr) * 2014-11-26 2016-06-02 Honeywell International Inc. Fonte ductile ferritique à base de silicium-molybdène-aluminium
US11667995B2 (en) 2021-09-21 2023-06-06 Ford Global Technologies, Llc Cast iron alloy for automotive engine applications with superior high temperature oxidation properties

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101899609B (zh) * 2010-08-31 2012-11-14 卫辉熔金高温材料有限责任公司 利用耐热球墨铸铁加工钢包滑动水口机构滑托的方法
CN102851575B (zh) * 2012-09-24 2014-04-23 苏州东海玻璃模具有限公司 抗氧化性合金化灰口铸铁及其制备方法
JP2014148694A (ja) * 2013-01-31 2014-08-21 Daihatsu Motor Co Ltd 鋳鉄
KR102148758B1 (ko) * 2014-02-21 2020-08-27 두산인프라코어 주식회사 엔진 배기계 부품용 구상흑연 주철
CN103898397B (zh) * 2014-04-14 2016-03-30 天津新伟祥工业有限公司 汽车涡轮壳及排气管用高硅钼铝铁素体耐热球墨铸铁
CN106435343A (zh) * 2016-10-18 2017-02-22 河池学院 用于伺服机械手的滑轨的合金
RU2623513C1 (ru) * 2016-10-31 2017-06-27 Юлия Алексеевна Щепочкина Чугун
CN107164706A (zh) * 2017-05-11 2017-09-15 安徽大德中电科技发展股份有限公司 一种适用于高速电机的合金钢转轴
CN107287497B (zh) * 2017-08-02 2019-01-29 马鞍山市万鑫铸造有限公司 高珠光体高韧性球墨铸铁
CN117604371B (zh) * 2023-12-12 2024-07-12 河北京东管业有限公司 一种球墨铸铁及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885285A (en) * 1957-08-22 1959-05-05 Allis Chalmers Mfg Co Alloyed nodular iron
EP0076701B1 (fr) 1981-10-05 1986-05-14 Nissan Motor Co., Ltd. Fonte à graphite sphéroidal, résistant à la chaleur
EP0821073A1 (fr) * 1996-07-25 1998-01-28 Federal-Mogul Burscheid GmbH Alliage de fonte pour la manufacture de segments de piston pour machines à combustion interne
WO2002095081A1 (fr) * 2001-05-24 2002-11-28 Wescast Industries, Inc. Fonte a graphite spheroidal resistant aux temperatures elevees et a l'oxydation a chaud
US20040091383A1 (en) * 2001-05-16 2004-05-13 Suzuki Motor Corporation Ferrite-based spheroidal graphite cast iron and exhaust system component using the same
EP1386976B1 (fr) 2002-07-24 2005-08-24 Georg Fischer Fahrzeugtechnik AG Fonte coulée

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517657A (ja) * 1974-07-10 1976-01-22 Kito Kk Cheenburotsuku
JPS52135820A (en) * 1976-05-08 1977-11-14 Tsnii Tefunorojii Mashinosutor Heat resistance iron
JPS5672151A (en) * 1979-11-17 1981-06-16 Toyo Chuko Kk Pseudo flaky graphite cast iron for glass molding metal mold
JPH03215649A (ja) * 1990-01-18 1991-09-20 Kobe Chutetsusho:Kk 高アルミニウム鋳鉄棒

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885285A (en) * 1957-08-22 1959-05-05 Allis Chalmers Mfg Co Alloyed nodular iron
EP0076701B1 (fr) 1981-10-05 1986-05-14 Nissan Motor Co., Ltd. Fonte à graphite sphéroidal, résistant à la chaleur
EP0821073A1 (fr) * 1996-07-25 1998-01-28 Federal-Mogul Burscheid GmbH Alliage de fonte pour la manufacture de segments de piston pour machines à combustion interne
US20040091383A1 (en) * 2001-05-16 2004-05-13 Suzuki Motor Corporation Ferrite-based spheroidal graphite cast iron and exhaust system component using the same
WO2002095081A1 (fr) * 2001-05-24 2002-11-28 Wescast Industries, Inc. Fonte a graphite spheroidal resistant aux temperatures elevees et a l'oxydation a chaud
EP1386976B1 (fr) 2002-07-24 2005-08-24 Georg Fischer Fahrzeugtechnik AG Fonte coulée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BUTSEL K T ET AL: "Cast iron containing carbon, silicon, manganese, aluminum, cerium, and iron", CAPLUS, 1976, XP002384548 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160053351A1 (en) * 2013-05-14 2016-02-25 Toshiba Kikai Kabushiki Kaisha High-stength, high-damping-capacity cast iron
US10077488B2 (en) * 2013-05-14 2018-09-18 Toshiba Kikai Kabushiki Kaisha High-strength, high-damping-capacity cast iron
DE112014002442B4 (de) * 2013-05-14 2019-07-11 Toshiba Kikai Kabushiki Kaisha Gusseisen hoher Stärke und hoher Dämpfungsfähigkeit
WO2016084021A1 (fr) * 2014-11-26 2016-06-02 Honeywell International Inc. Fonte ductile ferritique à base de silicium-molybdène-aluminium
US11667995B2 (en) 2021-09-21 2023-06-06 Ford Global Technologies, Llc Cast iron alloy for automotive engine applications with superior high temperature oxidation properties

Also Published As

Publication number Publication date
RU2008152348A (ru) 2010-07-20
BRPI0712390A2 (pt) 2012-10-16
KR20090037883A (ko) 2009-04-16
WO2007141108A1 (fr) 2007-12-13
CN101460641A (zh) 2009-06-17
US20100178193A1 (en) 2010-07-15
CA2653239A1 (fr) 2007-12-13
JP2009540115A (ja) 2009-11-19

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