EP1974062B1 - Process for production of compacted graphite iron - Google Patents

Process for production of compacted graphite iron Download PDF

Info

Publication number
EP1974062B1
EP1974062B1 EP06835848A EP06835848A EP1974062B1 EP 1974062 B1 EP1974062 B1 EP 1974062B1 EP 06835848 A EP06835848 A EP 06835848A EP 06835848 A EP06835848 A EP 06835848A EP 1974062 B1 EP1974062 B1 EP 1974062B1
Authority
EP
European Patent Office
Prior art keywords
cerium
magnesium
iron
mould
production
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.)
Not-in-force
Application number
EP06835848A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1974062A1 (en
Inventor
Rudolf Sillen
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.)
NovaCast Technologies AB
Original Assignee
NovaCast Technologies AB
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 NovaCast Technologies AB filed Critical NovaCast Technologies AB
Publication of EP1974062A1 publication Critical patent/EP1974062A1/en
Application granted granted Critical
Publication of EP1974062B1 publication Critical patent/EP1974062B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
    • 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
    • C21C1/08—Manufacture of cast-iron
    • 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
    • C21C1/105—Nodularising additive agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • 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

Definitions

  • the invention relates to a process for production of cast iron with a structure predominantly consisting of compacted graphite shapes.
  • the process is based on a combination of pre-treatment of a base iron and a final treatment in the mould.
  • Compacted graphite iron is a cast iron alloy with a graphite structure between flake type graphite shapes and spherical shapes.
  • the graphite shape is determined by the conditions in the liquid iron during the solidification.
  • Treatment of a base iron, preferably with a carbon equivalent between 4.0 and 4.4 and with sulphur content below 0.02%, with a ferrosilicon alloy containing 4-10% magnesium can be used to achieve the compacted graphite structure.
  • the magnesium content must be kept within very narrow limits usually within +/- 0.003% and with a level of about 0.008 to 0.015% depending on conditions of the base iron and the cooling rate in the casting to be produced. As used herein percent refers to percent by weight.
  • the treatment with magnesium is usually made in a ladle.
  • the magnesium treatment can be made inside each mould.
  • That technology known as in-mould treatment/technology is well-known for production of ductile iron.
  • a special version of the technology as described in WO 01/54844 A1 is suitable for production of compacted graphite iron.
  • the in-mould technology is based on placing the magnesium alloy in a chamber in the gating system in the mould. During pouring, the iron flows into the chamber and gradually dissolves the alloy. The treated metal then fills the casting cavity. The problems with fading of magnesium are eliminated when using this process.
  • Another example is shown in US-4,874,576 which reveals a two-step process where magnesium is added in the mould.
  • the invention concerns a process for production of compacted graphite iron using in-mould addition of a magnesium alloy in accordance with claim 1.
  • Preferred embodiments are defined in the dependent claims.
  • the amount of cerium is adjusted in relation to the sulphur content in the base iron.
  • the value for A varies preferably between 0.01 and 0.03 depending on the configuration of the casting i.e. variation in section dimensions and casting modulus.
  • cerium has a very high boiling point (3470°C) and a high density (6.14 g/cm3) it does not show any fading effect.
  • cerium By adding cerium to the base iron it can be properly dissolved and less magnesium alloy has to be added in the reaction chamber in the mould as cerium also has a structure forming effect.
  • the treatment alloy preferably contains 3-6% magnesium and 0.5-1.5% lanthanum.
  • Lanthanum has a favourable effect in reducing defects such as carbides and shrinkages in the casting. The effect on shrinkages is highest just after treatment and therefore it is optimal to add the lanthanum as late as possible.
  • compositions for commercially available alloys include:
  • cerium is added to the oven or the ladle (and not as a part of the magnesium alloy) and magnesium is added to the mould.
  • the magnesium addition can be reduced with at least 30% compared to a normal treatment in-the-mould without the pre-conditioning.
  • the reduced magnesium level in the castings has also the advantage that casting defects such as dross and micro-shrinkage are minimized.
EP06835848A 2005-12-20 2006-12-14 Process for production of compacted graphite iron Not-in-force EP1974062B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0502817A SE529445C2 (sv) 2005-12-20 2005-12-20 Process för framställning av kompaktgrafitjärn
PCT/SE2006/001424 WO2007073280A1 (en) 2005-12-20 2006-12-14 Process for production of compacted graphite iron

Publications (2)

Publication Number Publication Date
EP1974062A1 EP1974062A1 (en) 2008-10-01
EP1974062B1 true EP1974062B1 (en) 2013-01-23

Family

ID=38188913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06835848A Not-in-force EP1974062B1 (en) 2005-12-20 2006-12-14 Process for production of compacted graphite iron

Country Status (8)

Country Link
US (2) US20090183848A1 (sv)
EP (1) EP1974062B1 (sv)
KR (1) KR20080089577A (sv)
CN (1) CN101341262B (sv)
BR (1) BRPI0620077A2 (sv)
MX (1) MX2008007968A (sv)
SE (1) SE529445C2 (sv)
WO (1) WO2007073280A1 (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104903470B (zh) * 2013-09-06 2017-12-12 东芝机械株式会社 球状石墨铸铁金属熔液的球状化处理方法
CN105785882B (zh) * 2016-05-09 2019-05-14 哈尔滨理工大学 一种球墨铸铁球化孕育处理动态调控方法及系统
WO2018047134A1 (en) * 2016-09-12 2018-03-15 Snam Alloys Pvt Ltd A non-magnesium process to produce compacted graphite iron (cgi)
BR102016022690B1 (pt) * 2016-09-29 2022-02-08 Tupy S.A. Liga de ferro fundido vermicular para bloco e cabeçote de motor a combustão interna
CN109371191A (zh) * 2018-11-09 2019-02-22 中船海洋动力部件有限公司 一种蠕墨铸铁的蠕化孕育方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB833486A (en) * 1956-05-02 1960-04-27 British Cast Iron Res Ass Manufacture of engineering components and of improved grey cast iron therefor
US3392013A (en) * 1966-03-14 1968-07-09 Owens Illinois Inc Cast iron composition and process for making
US3765876A (en) * 1972-11-01 1973-10-16 W Moore Method of making nodular iron castings
EP0041953B1 (en) * 1979-12-19 1984-06-13 Foseco International Limited Production of vermicular graphite cast iron
DE3010623C2 (de) * 1980-03-20 1982-12-02 Metallgesellschaft Ag, 6000 Frankfurt Vorrichtung zum Behandlung von geschmolzenem Gußeisen
CH656147A5 (de) * 1981-03-31 1986-06-13 Fischer Ag Georg Verfahren zur herstellung eines gusseisens mit vermiculargraphit.
US4806157A (en) * 1983-06-23 1989-02-21 Subramanian Sundaresa V Process for producing compacted graphite iron castings
DE3801917A1 (de) * 1988-01-23 1989-08-03 Metallgesellschaft Ag Verfahren zur herstellung von gusseisen mit kugelgraphit
NO306169B1 (no) * 1997-12-08 1999-09-27 Elkem Materials Ympemiddel for stöpejern og fremgangsmÕte for fremstilling av ympemiddel
SE518344C2 (sv) 2000-01-26 2002-09-24 Novacast Ab Ingjutsystem

Also Published As

Publication number Publication date
MX2008007968A (es) 2008-09-26
SE0502817L (sv) 2007-06-21
WO2007073280A1 (en) 2007-06-28
US20120090803A1 (en) 2012-04-19
KR20080089577A (ko) 2008-10-07
BRPI0620077A2 (pt) 2011-11-01
CN101341262B (zh) 2010-12-29
SE529445C2 (sv) 2007-08-14
US20090183848A1 (en) 2009-07-23
EP1974062A1 (en) 2008-10-01
CN101341262A (zh) 2009-01-07

Similar Documents

Publication Publication Date Title
FI83540C (sv) Ympningsmedel för grått gjutjärn
EP1974062B1 (en) Process for production of compacted graphite iron
KR20180132857A (ko) 회주철 접종제
CN102851575A (zh) 抗氧化性合金化灰口铸铁及其制备方法
CN112853190B (zh) 一种高熵铸铁及其制备方法
US20010024622A1 (en) Process for producing nodular cast iron, and casting produced using this process
JP3202639B2 (ja) 球状黒鉛鋳鉄の球状化処理方法
CN110423937B (zh) 一种耐高温铝、锌液腐蚀的合金化灰铸铁及其熔炼工艺
Hemanth et al. Effect of cooling rate on eutectic cell count, grain size, microstructure, and ultimate tensile strength of hypoeutectic cast iron
JP3939014B2 (ja) 高強度鋳鉄
US4430123A (en) Production of vermicular graphite cast iron
Schulte et al. Phosphorus mitigation in cast lightweight Fe–Mn–Al–C steel
US3762915A (en) Method for casting gray cast iron composition
JP2634707B2 (ja) 球状黒鉛鋳鉄の製造方法
EP3283608B1 (en) Grain refinement in iron-based materials
Kiss Comparative Study on the In-Ladle Treatment Techniques for Nodulizing the Iron’s Graphite
JPS6059284B2 (ja) 鋳鉄の接種方法
SU1560608A1 (ru) Чугун
RU2241574C1 (ru) Способ отливки изделий из чугуна с шаровидным графитом
Gruzleski Aluminum-silicon eutectic modification—sodium or strontium?
CN105779889A (zh) 一种含钨钛高锰钢及其制备方法
SU1590481A1 (ru) Модификатор дл чугуна
CN110814304A (zh) 蠕墨铸铁的生产方法
JPH07242987A (ja) 鋳鉄用黒鉛球状化剤
JPH05331590A (ja) 鋳型内黒鉛球状化処理合金及び黒鉛球状化処理方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080625

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

RIC1 Information provided on ipc code assigned before grant

Ipc: C21C 1/10 20060101ALI20081204BHEP

Ipc: C22C 37/00 20060101ALI20081204BHEP

Ipc: C21C 1/08 20060101AFI20070817BHEP

Ipc: C22C 33/08 20060101ALI20081204BHEP

17Q First examination report despatched

Effective date: 20090402

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

DAX Request for extension of the european patent (deleted)
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 595025

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602006034412

Country of ref document: DE

Effective date: 20130321

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 595025

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130123

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20130123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130423

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130504

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130523

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130424

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130523

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

26N No opposition filed

Effective date: 20131024

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602006034412

Country of ref document: DE

Effective date: 20131024

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602006034412

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20131214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20131214

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602006034412

Country of ref document: DE

Effective date: 20140701

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140829

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140701

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131231

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131214

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131231

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20061214