WO2003093514A2 - Alliage inoculant anti microretassure pour traitement des fontes de moulage - Google Patents
Alliage inoculant anti microretassure pour traitement des fontes de moulage Download PDFInfo
- Publication number
- WO2003093514A2 WO2003093514A2 PCT/FR2003/001295 FR0301295W WO03093514A2 WO 2003093514 A2 WO2003093514 A2 WO 2003093514A2 FR 0301295 W FR0301295 W FR 0301295W WO 03093514 A2 WO03093514 A2 WO 03093514A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- alloy according
- cast iron
- alloy
- lanthanum
- bismuth
- Prior art date
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
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- 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
- 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
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Definitions
- the invention relates to the treatment in the liquid state of cast iron intended for the manufacture of parts for which it is desired to obtain a structure free of iron carbides and an absence of micro-shrinkage.
- Cast iron is a well-known iron-carbon-silicon alloy widely used for the manufacture of mechanical parts. It is known that to obtain good mechanical properties of these parts, it is ultimately necessary to obtain an iron + graphite structure while avoiding as much as possible the formation of iron carbides of Fe 3 C type which harden and weaken the alloy. Then it may be desired that the graphite formed is spheroidal, vermicular or lamellar, but the essential prerequisite to be fulfilled is to avoid the formation of iron carbide. To this end, the liquid iron undergoes an inoculation treatment before casting which favors the appearance of graphite on cooling rather than that of iron carbide. Inoculation treatment is therefore very important.
- inoculation whatever the inoculants used, has an efficiency on liquid cast iron which decreases over time and which, in general, has already decreased by 50% after ten minutes; a person skilled in the art designates this phenomenon under the name of "fading effect".
- progressive inoculation is generally practiced, consisting of several additions of inoculants at different stages in the development of the cast iron.
- Molded pins are considered by those skilled in the art to be the best level of quality; however, agglomerated pawns are often preferred to them for cost reasons.
- the duration of the casting of a part being very short, the kinetics of dissolution of the pawns must be extremely fast.
- the object of the invention is to provide inoculating alloys intended for the treatment of liquid iron allowing effective inoculation, in particular during treatment "in the mold", while avoiding the formation of micro-porosities in the parts obtained by molding.
- the invention relates to inoculating alloys intended for the treatment of cast iron containing (by weight) from 0.005 to 3% of an element of the group bismuth, lead and antimony, from 0.3 to 10% of metals of the group rare earths and possibly aluminum up to 5% and calcium up to 1.5%, the rest being ferro-silicon, lanthanum constituting more than 90% of the rare earth metals used in its composition.
- the alloy preferably contains bismuth at a content of between 0.2 and 1.5%, and preferably between 0.7 and 1.3%.
- the lanthanum content is advantageously between 0.3 and 8%, and preferably between 0.5 and 3%.
- the presence of at least 0.8% aluminum is advantageous, and its content is preferably between 1 and 3.5%.
- the alloy according to the invention can be packaged in the form of a powder or a mixture of alloy powders of different compositions, or in the form of pegs molded from the molten alloy, or agglomerated from a powder. or a mixture of powders.
- This powder preferably has a particle size less than 1 mm, with a particle size fraction between 50 and 250 ⁇ m representing more than 35% by weight of the total, and a fraction less than 50 ⁇ m representing less than 25% of the total.
- inoculating alloys based on FeSi at 75% were added, first added with an anti-micro-cracking element which can be either lanthanum or germanium.
- an anti-micro-cracking element which can be either lanthanum or germanium.
- germanium the required contents range from 0.3 to 6%.
- lanthanum they range from 0.3 to 8%, and preferably from 0.5 to 5%.
- test piece consists of a 110 mm high "N", with an angle at the top
- the width of the branches of the "N" being 20 mm and the thickness of the part 20 mm.
- This geometry gives a width of 80 mm at the top of the "N", a unit volume of 69 cm 3 , and a unit mass of 480 g to 500 g depending on the quality of the cast iron. On this type of part, the porosities appear selectively in the re-entrant part of the "N".
- the part is cut to mid-thickness, and the section is examined by optical microscopy to assess the surface of the porosities; the result is expressed in relative area compared to the area of the section.
- a treated cast iron ladle from the preliminary operation was inoculated in the ladle using an inoculating powder alloy with a particle size between 2 and 10 mm, of composition: "Foundry Grade", mainly Fe balance, used at the dose 200 g per ton of pig iron.
- This cast iron was used to cast N-shaped pieces of geometry identical to that defined in the control test, arranged in a cluster in a 36-piece sand mold fed by a supply channel where a filter made up of a refractory foam.
- the parts obtained were examined by optical microscopy on a polished section to determine the structure of the metal as a function of the depth and the level of porosity.
- the density of the graphite nodules was measured at 120 / mm 2 .
- the average porosity of the parts was evaluated at 2.4%.
- a second pocket of treated cast iron coming from the preliminary operation was inoculated in the pocket using an inoculating alloy with a particle size between 2 and 10 mm of composition:
- This cast iron was used to cast N-shaped pieces of geometry identical to that defined in the control test, arranged in a cluster in a 36-piece sand mold fed by a supply channel where a filter made up of a refractory foam.
- the parts obtained were examined by light microscopy on a polished section to determine the structure of the metal as a function of the depth and the level of porosity.
- the density of graphite nodules was counted at 360 / rnm 2 .
- the average porosity of the parts was evaluated at 0.3%.
- a third treated cast iron ladle coming from the preliminary operation was used to cast N-shaped pieces of geometry identical to that defined in the control test, arranged in a cluster in a 36-piece sand mold fed by a channel. lead where was placed a pawn of 25 g consisting of inoculating alloy for treatment in the mold, of composition:
- the parts obtained were examined by optical microscopy on section polished to determine the structure of the metal based on the depth and level of porosity. At the heart of the branches, the density of the graphite nodules was counted at 320 / mm 2 . The average porosity of the parts was evaluated at 0.2%.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2004-7017384A KR20040097396A (ko) | 2002-04-29 | 2003-04-24 | 주철 처리용의 미소 수축 공동의 형성을 방지하는 접종 합금 |
JP2004501648A JP2005528522A (ja) | 2002-04-29 | 2003-04-24 | 鋳造銑鉄処理用のミクロひけ巣を防止する接種合金 |
CA002484036A CA2484036A1 (fr) | 2002-04-29 | 2003-04-24 | Alliage inoculant anti microretassure pour traitement des fontes de moulage |
AU2003265514A AU2003265514A1 (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
US10/511,264 US20050180876A1 (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
EP03740659A EP1499750A2 (fr) | 2002-04-29 | 2003-04-24 | Alliage inoculant anti microretassure pour traitement des fontes de moulage |
MXPA04010671A MXPA04010671A (es) | 2002-04-29 | 2003-04-24 | Aleacion inoculante para evitar la formacion de microrrechupes para el tratamiento de los arrabios para fundicion. |
BR0309658-0A BR0309658A (pt) | 2002-04-29 | 2003-04-24 | Liga inoculante para ferro fundido |
ZA2004/08584A ZA200408584B (en) | 2002-04-29 | 2004-10-22 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
NO20045177A NO20045177L (no) | 2002-04-29 | 2004-11-26 | Inokulasjonslegering for behandling av stopejerndeler mot sprekkdannelse ved mikrokrymping |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/05385 | 2002-04-29 | ||
FR0205385A FR2839082B1 (fr) | 2002-04-29 | 2002-04-29 | Alliage inoculant anti microretassure pour traitement des fontes de moulage |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003093514A2 true WO2003093514A2 (fr) | 2003-11-13 |
WO2003093514A3 WO2003093514A3 (fr) | 2004-04-01 |
Family
ID=28800032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/001295 WO2003093514A2 (fr) | 2002-04-29 | 2003-04-24 | Alliage inoculant anti microretassure pour traitement des fontes de moulage |
Country Status (13)
Country | Link |
---|---|
US (1) | US20050180876A1 (fr) |
EP (1) | EP1499750A2 (fr) |
JP (1) | JP2005528522A (fr) |
KR (1) | KR20040097396A (fr) |
CN (1) | CN1665941A (fr) |
AU (1) | AU2003265514A1 (fr) |
BR (1) | BR0309658A (fr) |
CA (1) | CA2484036A1 (fr) |
FR (1) | FR2839082B1 (fr) |
MX (1) | MXPA04010671A (fr) |
NO (1) | NO20045177L (fr) |
WO (1) | WO2003093514A2 (fr) |
ZA (1) | ZA200408584B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7569092B2 (en) * | 2003-05-20 | 2009-08-04 | Pechiney Electrometallurgie | Inoculant products comprising bismuth and rare earths |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130056398A1 (en) * | 2006-12-08 | 2013-03-07 | Visys Nv | Apparatus and method for inspecting and sorting a stream of products |
CN102814491B (zh) * | 2012-09-09 | 2013-06-12 | 吉林大学 | 一种高强度灰铸铁强化剂及其强化处理工艺 |
FR2997962B1 (fr) * | 2012-11-14 | 2015-04-10 | Ferropem | Alliage inoculant pour pieces epaisses en fonte |
US20140345557A1 (en) * | 2013-05-23 | 2014-11-27 | Caterpillar Inc. | Thermal Spray Coated Engine Valve for Increased Wear Resistance |
SI3510394T1 (sl) | 2016-09-12 | 2022-02-28 | Snam Alloys Pvt Ltd, R&D Unit | Nemagnezijev postopek za proizvodnjo kompaktiranega grafitnega železa (CGI) |
CN106544462B (zh) * | 2016-10-25 | 2018-06-29 | 嘉善蓝欣涂料有限公司 | 一种球墨铸铁孕育剂及其制备方法和应用 |
CN107841588A (zh) * | 2017-12-13 | 2018-03-27 | 南京浦江合金材料股份有限公司 | 一种防球铁铸件缩松的硅铝镧孕育剂及其制备工艺 |
NO20172061A1 (en) * | 2017-12-29 | 2019-07-01 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
CN114317864B (zh) * | 2022-03-17 | 2022-06-24 | 勤威(天津)工业有限公司 | 一种减小球墨铸铁内部缩松的熔炼工艺 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4290805A (en) * | 1978-04-06 | 1981-09-22 | Compagnie Universelle D'acetylene Et D'electro-Metallurgie | Method for obtaining iron-based alloys allowing in particular their mechanical properties to be improved by the use of lanthanum, and iron-based alloys obtained by the said method |
US4363661A (en) * | 1981-04-08 | 1982-12-14 | Ford Motor Company | Method for increasing mechanical properties in ductile iron by alloy additions |
US4432793A (en) * | 1981-08-04 | 1984-02-21 | Societe Nobel Bozel | Ferroalloy for the treatment of cast metals and process |
EP0357521A1 (fr) * | 1988-08-12 | 1990-03-07 | Pechiney Electrometallurgie | Procédé d'obtention de fonte à graphite sphéroidal |
US5087290A (en) * | 1989-07-25 | 1992-02-11 | Skw Trostberg Aktiengesellschaft | Agent for the treatment of cast iron melts, process for the production thereof and the use thereof for treating cast iron melts |
EP0816522A1 (fr) * | 1996-06-25 | 1998-01-07 | Pechiney Electrometallurgie | Ferroalliage pour l'inoculation des fontes à graphite sphéroidal |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2841490A (en) * | 1952-02-27 | 1958-07-01 | Int Nickel Co | Method for making improved gray cast iron |
FR1525645A (fr) * | 1966-05-24 | 1968-10-23 | Vanadium Corp Of America | Perfectionnements aux procédés de préparation de fonte nodulaire |
JPS5616613A (en) * | 1979-07-21 | 1981-02-17 | Toyota Motor Corp | Additive for cast iron |
DE3147461C2 (de) * | 1981-12-01 | 1983-10-13 | Goetze Ag, 5093 Burscheid | Verschleißfeste Gußeisenlegierung hoher Festigkeit mit sphärolithischer Graphitausscheidung, ihr Herstellungsverfahren und ihre Verwendung |
JPS59197345A (ja) * | 1983-04-22 | 1984-11-08 | Osaka Tokushu Gokin Kk | Cv鋳鉄の製造方法 |
DE3726272A1 (de) * | 1987-08-07 | 1989-02-16 | Metallgesellschaft Ag | Verfahren zum impfen von gusseisen |
JP2626417B2 (ja) * | 1992-05-28 | 1997-07-02 | 信越化学工業株式会社 | 鋳型内黒鉛球状化処理合金及び黒鉛球状化処理方法 |
US5580401A (en) * | 1995-03-14 | 1996-12-03 | Copeland Corporation | Gray cast iron system for scroll machines |
NO306169B1 (no) * | 1997-12-08 | 1999-09-27 | Elkem Materials | Ympemiddel for stöpejern og fremgangsmÕte for fremstilling av ympemiddel |
US6793707B2 (en) * | 2002-01-10 | 2004-09-21 | Pechiney Electrometallurgie | Inoculation filter |
-
2002
- 2002-04-29 FR FR0205385A patent/FR2839082B1/fr not_active Expired - Lifetime
-
2003
- 2003-04-24 KR KR10-2004-7017384A patent/KR20040097396A/ko not_active Application Discontinuation
- 2003-04-24 WO PCT/FR2003/001295 patent/WO2003093514A2/fr not_active Application Discontinuation
- 2003-04-24 EP EP03740659A patent/EP1499750A2/fr not_active Ceased
- 2003-04-24 US US10/511,264 patent/US20050180876A1/en not_active Abandoned
- 2003-04-24 CN CN038154552A patent/CN1665941A/zh active Pending
- 2003-04-24 MX MXPA04010671A patent/MXPA04010671A/es unknown
- 2003-04-24 JP JP2004501648A patent/JP2005528522A/ja not_active Abandoned
- 2003-04-24 BR BR0309658-0A patent/BR0309658A/pt not_active IP Right Cessation
- 2003-04-24 AU AU2003265514A patent/AU2003265514A1/en not_active Abandoned
- 2003-04-24 CA CA002484036A patent/CA2484036A1/fr not_active Abandoned
-
2004
- 2004-10-22 ZA ZA2004/08584A patent/ZA200408584B/en unknown
- 2004-11-26 NO NO20045177A patent/NO20045177L/no not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4290805A (en) * | 1978-04-06 | 1981-09-22 | Compagnie Universelle D'acetylene Et D'electro-Metallurgie | Method for obtaining iron-based alloys allowing in particular their mechanical properties to be improved by the use of lanthanum, and iron-based alloys obtained by the said method |
US4363661A (en) * | 1981-04-08 | 1982-12-14 | Ford Motor Company | Method for increasing mechanical properties in ductile iron by alloy additions |
US4432793A (en) * | 1981-08-04 | 1984-02-21 | Societe Nobel Bozel | Ferroalloy for the treatment of cast metals and process |
EP0357521A1 (fr) * | 1988-08-12 | 1990-03-07 | Pechiney Electrometallurgie | Procédé d'obtention de fonte à graphite sphéroidal |
US5087290A (en) * | 1989-07-25 | 1992-02-11 | Skw Trostberg Aktiengesellschaft | Agent for the treatment of cast iron melts, process for the production thereof and the use thereof for treating cast iron melts |
EP0816522A1 (fr) * | 1996-06-25 | 1998-01-07 | Pechiney Electrometallurgie | Ferroalliage pour l'inoculation des fontes à graphite sphéroidal |
Non-Patent Citations (4)
Title |
---|
DATABASE WPI Section Ch, Week 198451 Derwent Publications Ltd., London, GB; Class M27, AN 1984-315317 XP002223349 & JP 59 197345 A (OSAKA TOKUSHU GOKIN KK), 8 novembre 1984 (1984-11-08) * |
PATENT ABSTRACTS OF JAPAN vol. 005, no. 067 (C-053), 7 mai 1981 (1981-05-07) & JP 56 016613 A (TOYOTA MOTOR CORP), 17 février 1981 (1981-02-17) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 170 (C-1182), 23 mars 1994 (1994-03-23) -& JP 05 331590 A (SHIN ETSU CHEM CO LTD;OTHERS: 02), 14 décembre 1993 (1993-12-14) * |
STEFANESCU D M ET AL: "EINFLUSS DER ZUSAMMENSETZUNG VON BEHANDLUNGS-UND IMPFLEGIERUNGEN AUF DIE KUGELZAHL VON GUSSEISEN MIT KUGELGRAPHIT" GIESSEREI-PRAXIS, SCHIELE & SCHON. BERLIN, DE, no. 3/4, 1 mars 1987 (1987-03-01), pages 33-44, XP000671319 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7569092B2 (en) * | 2003-05-20 | 2009-08-04 | Pechiney Electrometallurgie | Inoculant products comprising bismuth and rare earths |
Also Published As
Publication number | Publication date |
---|---|
EP1499750A2 (fr) | 2005-01-26 |
CA2484036A1 (fr) | 2003-11-13 |
ZA200408584B (en) | 2005-12-28 |
FR2839082A1 (fr) | 2003-10-31 |
CN1665941A (zh) | 2005-09-07 |
KR20040097396A (ko) | 2004-11-17 |
BR0309658A (pt) | 2005-02-22 |
JP2005528522A (ja) | 2005-09-22 |
MXPA04010671A (es) | 2004-12-13 |
US20050180876A1 (en) | 2005-08-18 |
NO20045177L (no) | 2004-11-26 |
AU2003265514A1 (en) | 2003-11-17 |
FR2839082B1 (fr) | 2004-06-04 |
WO2003093514A3 (fr) | 2004-04-01 |
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