EP0816522B1 - Ferrolegierung für die Impfung von Kugelgraphitgusseisen - Google Patents

Ferrolegierung für die Impfung von Kugelgraphitgusseisen Download PDF

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Publication number
EP0816522B1
EP0816522B1 EP97420097A EP97420097A EP0816522B1 EP 0816522 B1 EP0816522 B1 EP 0816522B1 EP 97420097 A EP97420097 A EP 97420097A EP 97420097 A EP97420097 A EP 97420097A EP 0816522 B1 EP0816522 B1 EP 0816522B1
Authority
EP
European Patent Office
Prior art keywords
alloy
ferroalloy
cast iron
bismuth
inoculation
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
EP97420097A
Other languages
English (en)
French (fr)
Other versions
EP0816522A1 (de
Inventor
Thomas Margaria
Robert Herold
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.)
Ferropem SAS
Original Assignee
Pechiney Electrometallurgie SAS
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
Priority claimed from FR9608151A external-priority patent/FR2750142B1/fr
Application filed by Pechiney Electrometallurgie SAS filed Critical Pechiney Electrometallurgie SAS
Publication of EP0816522A1 publication Critical patent/EP0816522A1/de
Application granted granted Critical
Publication of EP0816522B1 publication Critical patent/EP0816522B1/de
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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
    • C21C1/105—Nodularising additive agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel
    • C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys

Definitions

  • the invention relates to a ferroalloy based on ferrosilicon for the treatment inoculation of spheroidal graphite cast irons.
  • Treatment of liquid cast irons to give them a graphite structure spheroidal comprises the succession of 4 operations: carburation, desulfurization, spheroidization and inoculation. This last operation is generally carried out at using a ferrosilicon-based alloy comprising various additives.
  • a product widely used for this purpose is the SPHERIX® alloy, marketed by Applicant and covered by French patent n ° 2511044, filed on 08/4/1981 at name of the company NOBEL-BOZEL. It is a ferrosilicon comprising 0.005% to 3% of rare earths and 0.005% to 3% of at least one of the elements bismuth, lead and / or antimony.
  • Alloys of this type contain approximately 1 to 1.5%, and always at least 0.6% of calcium; experience shows that this element improves the yield of bismuth, lead and / or antimony at the time of the development of the alloy, and helps distribute these elements evenly throughout the alloy.
  • Applicant's patent EP 0357521 relates to an alloy which combines the inoculant and nodulizing properties of cast iron, of composition (% by weight): Si: 41 - 65 Mg: 2-30 Bi: 0.1 - 4 Ca, Ba, Sr ⁇ 4 each Al ⁇ 1.5 Fe balance.
  • the alloy for compositions close to that exemplified in the patent, exhibits the same tendency to disintegrate on storage.
  • the invention aims to remedy this drawback while maintaining the good alloy results as inoculant. It relates to an alloy of the type of that described in patent FR 2511044, that is to say a ferrosilicon containing, by weight, 0.005% to 3% rare earths, 0.005% to 3% bismuth, lead and / or antimony, 0.3 to 3% calcium, and 0.3 to 3% magnesium, the remainder being ferrosilicon and unavoidable impurities, the Si / Fe ratio being greater than 2, and preferably 2.5.
  • the Applicant has studied the phenomenon and linked it to the decomposition by atmospheric humidity of a phase calcium-bismuth collected at the grain boundaries of the inoculants.
  • Calcium is an element of addition necessary for the fixation of bismuth, lead or antimony, poorly soluble in the iron-silicon phases. It is particularly important in the case of bismuth, the most volatile but also the most effective of the three elements in term of germination of the graphite of the cast iron, because it makes it possible to maintain a satisfactory yield of bismuth.
  • the Applicant has sought a substitute for calcium and discovered incidentally that magnesium makes it possible to avoid losses of bismuth by volatilization and to ensure the stability of the inoculant with respect to humidity.
  • the bismuth-magnesium binary phases are not attacked by water; this is the case, for example, of the Bi 2 Mg 3 phase.
  • the ternary phases bismuth-magnesium-calcium are also water resistant, which allows possibly maintain a certain amount of calcium in the product.
  • the alloy inoculant must contain 0.3 to 3% by weight of calcium, and preferably 0.5 to 2%, and from 0.3 to 3% of magnesium, preferably from 0.5 to 1.5%.
  • the alloy can be introduced into the liquid iron in the form of sieved grains of particle size between 2 and 7 mm, or in the form of a cored wire containing such grains
  • Alloy A corresponds to a usual composition of SPHERIX®, alloys B and C are in accordance with the invention.
  • alloys were ground into pieces and then sieved to a size between 2 and 7 mm and were stored for 1 month under normal storage conditions. AT after this storage, alloy A contained 34% by weight of size particles less than 2 mm and could not be used before being re-scaled to 2 mm, while the alloys B and C contained only 2.5% and 2.2% respectively and therefore had no not to be re-scanned before use.
  • An alloy D of composition (% by weight) was prepared: Yes It TR Bi Al Mg VS Fe 52.7 0.72 0.51 1.02 0.72 5.1 0.25 38.6

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Carbon And Carbon Compounds (AREA)

Claims (5)

  1. Ferrolegierung für die Impfung von Kugelgraphitgusseisen auf Basis von Ferrosilicium und mit, in Masse, 0,005% bis 3% Seltene Erden, 0,005% bis 3% Wismut, Blei und/oder Antimon, 0,3 bis 3% Calcium und 0,3 bis 3% Magnesium, Rest Ferrosilicium und die unvermeidbaren Verunreinigungen, wobei das Si-Fe-Verhältnis größer als 2 ist.
  2. Ferrolegierung nach Anspruch 1, wobei das Si-Fe-Verhältnis größer als 2,5 ist.
  3. Ferrolegierung nach einem der Ansprüche 1 oder 2, mit 0,5 bis 2 Masse% Calcium.
  4. Ferrolegierung nach einem der Ansprüche 1 bis 3, mit 0,5 bis 1,5 Masse% Magnesium.
  5. Ferrolegierung nach einem der Ansprüche 1 bis 4, die dem Gusseisen in Form von Fülldraht zugegeben wird.
EP97420097A 1996-06-25 1997-06-23 Ferrolegierung für die Impfung von Kugelgraphitgusseisen Expired - Lifetime EP0816522B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9608151 1996-06-25
FR9608151A FR2750142B1 (fr) 1996-06-25 1996-06-25 Ferroalliage pour l'inoculation des fontes a graphite spheroidal
FR9702040 1997-02-17
FR9702040A FR2750143B1 (fr) 1996-06-25 1997-02-17 Ferroalliage pour l'inoculation des fontes a graphite spheroidal

Publications (2)

Publication Number Publication Date
EP0816522A1 EP0816522A1 (de) 1998-01-07
EP0816522B1 true EP0816522B1 (de) 2001-02-28

Family

ID=26232802

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97420097A Expired - Lifetime EP0816522B1 (de) 1996-06-25 1997-06-23 Ferrolegierung für die Impfung von Kugelgraphitgusseisen

Country Status (8)

Country Link
US (1) US5733502A (de)
EP (1) EP0816522B1 (de)
AT (1) ATE199410T1 (de)
DE (1) DE69704137T2 (de)
DK (1) DK0816522T3 (de)
ES (1) ES2155976T3 (de)
FR (1) FR2750143B1 (de)
PT (1) PT816522E (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6910292B2 (en) 2003-02-06 2005-06-28 Maytag Corporation Clothes drying cabinet with improved air distribution

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6496543B1 (en) * 1996-10-29 2002-12-17 Qualcomm Incorporated Method and apparatus for providing high speed data communications in a cellular environment
US6335922B1 (en) 1997-02-11 2002-01-01 Qualcomm Incorporated Method and apparatus for forward link rate scheduling
US7751370B2 (en) 2001-07-13 2010-07-06 Qualcomm Incorporated Method and apparatus for forward link rate scheduling
FR2839082B1 (fr) * 2002-04-29 2004-06-04 Pechiney Electrometallurgie Alliage inoculant anti microretassure pour traitement des fontes de moulage
FR2855186B1 (fr) * 2003-05-20 2005-06-24 Pechiney Electrometallurgie Produits inoculants contenant du bismuth et des terres rares
TWI236488B (en) * 2004-03-02 2005-07-21 Taiwan Textile Res Inst Flame retarded composition and a polymer having thereof
MC200112A1 (fr) * 2007-12-05 2008-07-02 Luca Cattaneo Procédé de modification de la phase graphitique dela fonte de la forme lamellaire à la forme sphéro ïdale ou vermiculaire à travers un monophylle animé
FR2997962B1 (fr) 2012-11-14 2015-04-10 Ferropem Alliage inoculant pour pieces epaisses en fonte
NO347571B1 (en) * 2016-06-30 2024-01-15 Elkem Materials Cast Iron Inoculant and Method for Production of Cast Iron Inoculant
NO20161094A1 (en) 2016-06-30 2018-01-01 Elkem As Cast Iron Inoculant and Method for Production of Cast Iron Inoculant
NO20172065A1 (en) * 2017-12-29 2019-07-01 Elkem Materials Cast iron inoculant and method for production of cast iron inoculant
NO20172063A1 (en) 2017-12-29 2019-07-01 Elkem Materials Cast iron inoculant and method for production of cast iron inoculant
NO346252B1 (en) 2017-12-29 2022-05-09 Elkem Materials Cast iron inoculant and method for production of cast iron inoculant
NO20172064A1 (en) 2017-12-29 2019-07-01 Elkem Materials Cast iron inoculant and method for production of cast iron inoculant
NO20172061A1 (en) 2017-12-29 2019-07-01 Elkem Materials Cast iron inoculant and method for production of cast iron inoculant
EP3575484A1 (de) 2018-06-01 2019-12-04 LG Electronics Inc. -1- Wäschebehandlungsvorrichtung
MX2019007412A (es) * 2019-06-20 2019-08-29 Francisco Alfonso Labrador Rodriguez Aditivo para tratar hierro en fundicion para producir hierro fundido de contraccion cero y con grafito esferoidal tipo lonsdaleita.
CN116287552A (zh) * 2023-04-06 2023-06-23 江苏亚峰合金材料有限公司 安全环保的微颗粒含钡球化剂及加工工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE295192C (de) *
JPS579813A (en) * 1980-06-20 1982-01-19 Nippon Fuandorii Service Kk Graphite spheroidizing agent for molten iron
FR2511044A1 (fr) * 1981-08-04 1983-02-11 Nobel Bozel Ferro-alliage pour le traitement d'inoculation des fontes a graphite spheroidal
US4385030A (en) * 1982-04-21 1983-05-24 Foote Mineral Company Magnesium ferrosilicon alloy and use thereof in manufacture of modular cast iron
JPS62161909A (ja) * 1986-01-10 1987-07-17 Kitagawa Tekkosho:Kk 球状黒鉛鋳鉄及びバ−ミキユラ−鋳鉄製造用添加剤
FR2635534B1 (fr) * 1988-08-12 1992-04-03 Pechiney Electrometallurgie Procede d'obtention de fontes a graphite spheroidal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6910292B2 (en) 2003-02-06 2005-06-28 Maytag Corporation Clothes drying cabinet with improved air distribution

Also Published As

Publication number Publication date
DE69704137T2 (de) 2001-08-30
EP0816522A1 (de) 1998-01-07
DE69704137D1 (de) 2001-04-05
ES2155976T3 (es) 2001-06-01
PT816522E (pt) 2001-08-30
FR2750143B1 (fr) 1998-08-14
DK0816522T3 (da) 2001-09-03
US5733502A (en) 1998-03-31
FR2750143A1 (fr) 1997-12-26
ATE199410T1 (de) 2001-03-15

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