EP1499750A2 - Alliage inoculant anti microretassure pour traitement des fontes de moulage - Google Patents
Alliage inoculant anti microretassure pour traitement des fontes de moulageInfo
- Publication number
- EP1499750A2 EP1499750A2 EP03740659A EP03740659A EP1499750A2 EP 1499750 A2 EP1499750 A2 EP 1499750A2 EP 03740659 A EP03740659 A EP 03740659A EP 03740659 A EP03740659 A EP 03740659A EP 1499750 A2 EP1499750 A2 EP 1499750A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy according
- cast iron
- alloy
- lanthanum
- bismuth
- 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.)
- Ceased
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 39
- 239000000956 alloy Substances 0.000 title claims abstract description 39
- 238000005266 casting Methods 0.000 title claims abstract description 6
- 229910001018 Cast iron Inorganic materials 0.000 title abstract description 25
- 238000011081 inoculation Methods 0.000 title abstract description 8
- 238000005336 cracking Methods 0.000 title abstract description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 17
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 6
- 239000011575 calcium Substances 0.000 claims abstract description 6
- 150000002910 rare earth metals Chemical group 0.000 claims abstract description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 4
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims abstract description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 3
- 150000002739 metals Chemical class 0.000 claims abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 3
- 238000005054 agglomeration Methods 0.000 claims 1
- 230000002776 aggregation Effects 0.000 claims 1
- 241000237858 Gastropoda Species 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 230000001143 conditioned effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 239000002054 inoculum Substances 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 229910005347 FeSi Inorganic materials 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000399 optical microscopy Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- -1 iron carbides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910000858 La alloy Inorganic materials 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- ZKSQHBGSFZJRBE-UHFFFAOYSA-N [Si].[C].[Fe] Chemical compound [Si].[C].[Fe] ZKSQHBGSFZJRBE-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 150000002602 lanthanoids Chemical group 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910021483 silicon-carbon alloy Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
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)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0205385A FR2839082B1 (fr) | 2002-04-29 | 2002-04-29 | Alliage inoculant anti microretassure pour traitement des fontes de moulage |
| FR0205385 | 2002-04-29 | ||
| PCT/FR2003/001295 WO2003093514A2 (fr) | 2002-04-29 | 2003-04-24 | Alliage inoculant anti microretassure pour traitement des fontes de moulage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1499750A2 true EP1499750A2 (fr) | 2005-01-26 |
Family
ID=28800032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03740659A Ceased EP1499750A2 (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 (ja) |
| EP (1) | EP1499750A2 (ja) |
| JP (1) | JP2005528522A (ja) |
| KR (1) | KR20040097396A (ja) |
| CN (1) | CN1665941A (ja) |
| AU (1) | AU2003265514A1 (ja) |
| BR (1) | BR0309658A (ja) |
| CA (1) | CA2484036A1 (ja) |
| FR (1) | FR2839082B1 (ja) |
| MX (1) | MXPA04010671A (ja) |
| NO (1) | NO20045177L (ja) |
| WO (1) | WO2003093514A2 (ja) |
| ZA (1) | ZA200408584B (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018047134A1 (en) | 2016-09-12 | 2018-03-15 | Snam Alloys Pvt Ltd | A non-magnesium process to produce compacted graphite iron (cgi) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2855186B1 (fr) * | 2003-05-20 | 2005-06-24 | Pechiney Electrometallurgie | Produits inoculants contenant du bismuth et des terres rares |
| 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 |
| 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 |
Family Cites Families (16)
| 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 |
| FR2421948A1 (fr) * | 1978-04-06 | 1979-11-02 | Pro Chi Met Produits Chim Meta | Procede de preparation d'alliages ferreux sensiblement exempts de cerium, permettant d'ameliorer notamment leurs proprietes mecaniques grace a l'emploi de lanthane, et alliages ferreux obtenus par ce procede |
| JPS5616613A (en) * | 1979-07-21 | 1981-02-17 | Toyota Motor Corp | Additive for cast iron |
| US4363661A (en) * | 1981-04-08 | 1982-12-14 | Ford Motor Company | Method for increasing mechanical properties in ductile iron by alloy additions |
| FR2511044A1 (fr) * | 1981-08-04 | 1983-02-11 | Nobel Bozel | Ferro-alliage pour le traitement d'inoculation des fontes a graphite spheroidal |
| 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 |
| FR2635534B1 (fr) * | 1988-08-12 | 1992-04-03 | Pechiney Electrometallurgie | Procede d'obtention de fontes a graphite spheroidal |
| DE3924558C1 (ja) * | 1989-07-25 | 1990-11-22 | Skw Trostberg Ag, 8223 Trostberg, De | |
| 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 |
| FR2750143B1 (fr) * | 1996-06-25 | 1998-08-14 | Pechiney Electrometallurgie | Ferroalliage pour l'inoculation des fontes a graphite spheroidal |
| 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 AU AU2003265514A patent/AU2003265514A1/en not_active Abandoned
- 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 BR BR0309658-0A patent/BR0309658A/pt not_active IP Right Cessation
- 2003-04-24 JP JP2004501648A patent/JP2005528522A/ja not_active Abandoned
- 2003-04-24 CN CN038154552A patent/CN1665941A/zh active Pending
- 2003-04-24 KR KR10-2004-7017384A patent/KR20040097396A/ko not_active Application Discontinuation
- 2003-04-24 MX MXPA04010671A patent/MXPA04010671A/es unknown
- 2003-04-24 CA CA002484036A patent/CA2484036A1/fr not_active Abandoned
- 2003-04-24 US US10/511,264 patent/US20050180876A1/en 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
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO03093514A3 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018047134A1 (en) | 2016-09-12 | 2018-03-15 | Snam Alloys Pvt Ltd | A non-magnesium process to produce compacted graphite iron (cgi) |
| EP3510394A4 (en) * | 2016-09-12 | 2020-03-18 | Snam Alloys Pvt Ltd | MAGNESIUM-FREE PROCESS FOR PRODUCING COMPACTED GRAPHIC IRON (CGI) |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2839082B1 (fr) | 2004-06-04 |
| CN1665941A (zh) | 2005-09-07 |
| FR2839082A1 (fr) | 2003-10-31 |
| WO2003093514A2 (fr) | 2003-11-13 |
| AU2003265514A1 (en) | 2003-11-17 |
| ZA200408584B (en) | 2005-12-28 |
| US20050180876A1 (en) | 2005-08-18 |
| CA2484036A1 (fr) | 2003-11-13 |
| KR20040097396A (ko) | 2004-11-17 |
| WO2003093514A3 (fr) | 2004-04-01 |
| JP2005528522A (ja) | 2005-09-22 |
| BR0309658A (pt) | 2005-02-22 |
| NO20045177L (no) | 2004-11-26 |
| MXPA04010671A (es) | 2004-12-13 |
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Legal Events
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