FR2839082A1 - INOCULATING ALLOY ANTI MICRORETASSURE FOR PROCESSING MOLDING WAFERS - Google Patents
INOCULATING ALLOY ANTI MICRORETASSURE FOR PROCESSING MOLDING WAFERS Download PDFInfo
- Publication number
- FR2839082A1 FR2839082A1 FR0205385A FR0205385A FR2839082A1 FR 2839082 A1 FR2839082 A1 FR 2839082A1 FR 0205385 A FR0205385 A FR 0205385A FR 0205385 A FR0205385 A FR 0205385A FR 2839082 A1 FR2839082 A1 FR 2839082A1
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- Prior art keywords
- cast iron
- alloy
- inoculant
- lanthanum
- iron
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- 229910045601 alloy Inorganic materials 0.000 title abstract description 36
- 239000000956 alloy Substances 0.000 title abstract description 36
- 238000000465 moulding Methods 0.000 title description 4
- 235000012431 wafers Nutrition 0.000 title 1
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 19
- 239000002054 inoculum Substances 0.000 abstract description 19
- 229910052746 lanthanum Inorganic materials 0.000 abstract description 17
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000203 mixture Substances 0.000 abstract description 13
- 229910052797 bismuth Inorganic materials 0.000 abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 abstract description 9
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 7
- 150000002910 rare earth metals Chemical class 0.000 abstract description 7
- 229910052791 calcium Inorganic materials 0.000 abstract description 6
- 239000011575 calcium Substances 0.000 abstract description 6
- 238000011081 inoculation Methods 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 abstract description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical group [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 abstract description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 239000000843 powder Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 241000920340 Pion Species 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 7
- 239000010439 graphite Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 240000007643 Phytolacca americana Species 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000001143 conditioned effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 229910005347 FeSi Inorganic materials 0.000 description 2
- 229910000805 Pig iron 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
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 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
- 229910000858 La alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- ZKSQHBGSFZJRBE-UHFFFAOYSA-N [Si].[C].[Fe] Chemical compound [Si].[C].[Fe] ZKSQHBGSFZJRBE-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 230000007423 decrease 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
- 239000000945 filler Substances 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 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
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 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
- 239000000243 solution 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
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
L'invention a pour objet des alliages inoculants destinés au traitement de la fonte de moulage contenant (en poids) de 0, 005 à 3% d'un élément du groupe bismuth, plomb et antimoine, de 0, 3 à 10% de métaux du groupe des terres rares et éventuellement de l'aluminium jusqu'à 5% et du calcium jusqu'à 1, 5%, le reste étant du ferro-silicium, le lanthane constituant plus de 90% des métaux des terres rares entrant dans sa composition. Les alliages selon l'invention permettent une inoculation efficace de la fonte et évitent l'apparition de micro-retassures dans les pièces moulées.The invention relates to inoculant alloys for the treatment of cast iron containing (by weight) from 0.005 to 3% of an element of the bismuth, lead and antimony group, from 0.3 to 10% of metals. rare earth and possibly aluminum up to 5% and calcium up to 1, 5%, the rest being ferro-silicon, lanthanum constituting more than 90% rare earth metals entering its composition. The alloys according to the invention allow effective inoculation of the cast iron and avoid the appearance of micro-shrinkage in the molded parts.
Description
avec un acide nucleique identifie en a).with a nucleic acid identified in a).
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Alliage inoculant anti microretassure pour traitement des fontes de moulage. Inoculant alloy anti microretassure for processing cast irons.
s Domaine de ['invention L' invention concerne le traitement a l' etat liquide de la fonte destinee a la fabrication de pieces pour lesquelles on souhaite obtenir une structure exempte de carbures de fer et une FIELD OF THE DISCLOSURE The invention relates to the treatment in the liquid state of cast iron for the manufacture of parts for which it is desired to obtain a structure free from iron carbides and a
0 absence de micro-retassures.0 absence of micro-shrinkage.
Etat de la technique La fonte est un alliage fer-carbone-silicium bien connu et largement utilise pour la fabrication de pieces mecaniques. On salt que pour obtenir de bonnes proprietes mecaniques de ces pieces, il faut obtenir in fine une structure fer + graphite en evitant le plus possible la State of the art 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 necessary to obtain in fine a structure iron + graphite avoiding as much as possible the
formation de carbures de fer de type Fe3C qui durcissent et fragilisent l'alliage. formation of Fe3C type iron carbides which harden and weaken the alloy.
Ensuite on peut sonhaiter que le graphite forme soit spheroidal, vermiculaire ou lamellaire, mais la condition prealable essentielle a remplir est d'eviter la formation de carbure de fen A cette fin, la fonte liquide subit avant coulee un traitement d' inoculation qui favorise au refroidissement ['apparition de graphite plutOt que celle de carbure de fen Le traitement d'inoculation est done tres important. Or il est bien connu que ['inoculation, quels que soient les inoculants utilises, a sur la fonte liquide une efficacite qui diminue dans le temps et qui, en general, a deja baisse de 50% au bout d'une dizaine de minutes, l'homme de 2s l'art designe ce phenomene sous le nom d'<<effet d'evanouissement>>. Pour obtenir un maximum d'efficacite, on pratique en general ['inoculation progressive, consistent en plusieurs aj outs d' inoculants a differents stades de [' elaboration de la fonte. Ainsi il est d'usage courant d'inoculer la fonte liquide, d'une part en poche avec un alliage inoculant par exemple en grains de taille comprise entre 2 et 10 mm ou entre 0,4 et 2 mm, d'autre part << au o jet >>, c'est a dire a la coulee de la poche avec un alliage inoculant en grains de taille comprise entre 0,2 et 0,7 mm, et enfin << dans le moule >>, en fait dans les canaux d'alimentation des moules, en disposant sur le parcours de la fonte liquide des inserts constitues d'un materiau inoculant. Ces inserts de forme definie portent le nom de pions. I1 existe deux types de pions: Then it can be said that the graphite forms either spheroidal, vermicular or lamellar, but the essential prerequisite to fulfill is to avoid the formation of fen carbide For this purpose, the liquid iron undergoes before casting a treatment of inoculation which favors The appearance of graphite rather than that of fen carbide is very important. The inoculation treatment is therefore very important. Now it is well known that inoculation, whatever the inoculants used, has on the liquid iron an effectiveness which decreases over time and which, in general, has already dropped by 50% after about ten minutes. the man of 2s art designates this phenomenon under the name of "fading effect". In order to obtain maximum efficiency, inoculation is generally carried out in a gradual manner, consisting of several injections of inoculants at different stages of the smelting process. Thus it is common practice to inoculate the molten iron, on the one hand in a pocket with an inoculant alloy, for example grains of size between 2 and 10 mm or between 0.4 and 2 mm, on the other hand < "au jet", that is to say the casting of the pocket with an inoculant grain size of between 0.2 and 0.7 mm, and finally << in the mold >>, in fact in the feeding channels of the molds, arranging inserts made of an inoculating material on the path of the liquid cast iron. These inserts of definite shape are called pawns. There are two types of pions:
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ythere
- les pions << moules obtenus par moulage de l'inoculant fondu. mold pions obtained by molding the molten inoculant.
- les pions agglomeres obtenus a partir d'une poudre pressee avec en general tres peu de agglomerated pions obtained from a pressed powder with generally very few
liant, voire meme sans liant.binding, or even without binder.
Les pions moules vent consideres par l'homme de l'art comme le meilleur niveau de qualite; s toutefois les pions agglomeres leur vent souvent preferes pour des raisons de cout. La duree de la coulee d'une piece etant tres course, la cinetique de dissolution des pions doit etre The molded pieces are considered by the person skilled in the art as the best level of quality; However, agglomerated pawns are often preferred for reasons of cost. The duration of the casting of a piece being very running, the kinetics of dissolution of the pions must be
extremement rapide.extremely fast.
Par ailleurs, l'homme de l'art constate bien souvent dans les pieces la presence de vices de Moreover, those skilled in the art often find in the rooms the presence of vices of
dimensions millimetriques ou micrometriques designees sous le nom de micro-retassures. millimetric or micrometric dimensions designated as micro-shrinkage.
0 Ces defauts fragilisent les pieces; en outre, si un usinage ulterieur des pieces est necessaire, par exemple pour dresser une surface, la fait de somber sur de tels defauts conduit au rebut 0 These defects weaken the parts; in addition, if further machining of the pieces is necessary, for example to establish a surface, the fact of sinking on such defects leads to scrapping
inevitable des pieces defectueuses.inevitable defective parts.
Un moyen connu pour eviter ['apparition de micro-retassures dans les pieces en fonte est l' aj out de lanthane dans la fonte liquide. Ce metal du groupe des lanthanides possede en effet la propriete de diminuer la viscosite de la fonte, non seulement celle de la fonte liquide juste avant le debut de sa solidification, mais aussi celle de la fonte en cours de solidification, c'est a dire du melange solide + liquide. Tout se passe comme si, par aj out de lanthane, la fonte en mouvement devenait thixotrope. L'homme de l'art peut alors, en dessinant correctement ses moules, rassembler les retassures dans la masselote d'alimentation et obtenir ainsi des pieces One known means of avoiding the appearance of micro-shrink in cast iron parts is the addition of lanthanum to the molten iron. This metal of the group of lanthanides has the property of reducing the viscosity of the melt, not only that of the liquid melt just before the beginning of its solidification, but also that of the melt during solidification, that is to say solid + liquid mixture. Everything happens as if, by aj out of lanthanum, the melting in movement became thixotropic. The person skilled in the art can then, by correctly drawing his molds, gather the sinkholes in the feeder and thus obtain parts
seines.seines.
Ainsi ont ete mis successivement sur le marche, d'abord des nodulisants contenant du lanthane, dont ['usage etait reserve aux fontes nodulaires cites fontes GS, puis des inoculants de type FeSi a 45% de Si et 2% de La, utilisables aussi bien pour les fontes GS que pour les Thus, lanthanum-containing nodulisers were used successively, the use of which was reserved for the nodular felts mentioned in the GS font, and then of FeSi inoculants containing 45% Si and 2% La, which could also be used. good for GS fonts that for
fontes a graphite lamellaire cites fontes GL. lamellar graphite cast iron font font GL.
2s L' invention a pour but de fournir des alliages inoculants destines au traitement de la fonte liquide permettant une inoculation efficace, notamment lors du traitement << dans le moule >>, The object of the invention is to provide inoculant alloys for the treatment of liquid cast iron for efficient inoculation, especially during "in-mold" treatment,
tout en evitant la formation de micro-porosites dans les pieces obtenues par moulage. while avoiding the formation of micro-porosites in the parts obtained by molding.
Objet de ['invention L' invention a pour obj et des alliages inoculants destines au traitement de la fonte de moulage contenant (en poids) de 0, 005 a 3% d'un element du groupe bismuth, plomb et antimoine, de 0,3 a 10% de metaux du groupe des terres rares et eventuellement de l'aluminium jusqu'a 5% OBJECT OF THE INVENTION The object of the invention is to provide inoculating alloys for the treatment of cast iron containing (by weight) from 0.005 to 3% of a bismuth, lead and antimony group element of 0, 3 to 10% rare earth metals and possibly aluminum up to 5%
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et du calcium jusqu'a 1,5%, le reste etant du ferro-silicium, le lanthane constituent plus de and calcium up to 1.5%, the rest being ferro-silicon, lanthanum is more than
% des metaux des terres rares entrant dans sa composition. % of the rare earth metals used in its composition.
L'alliage contient de preference du bismuth a une teneur comprise entre 0, 2 et 1,5%, et de preference entre 0,7 et 1,3%. La teneur en lanthane est avantageusement comprise entre 0,3 et 8%, et de preference entre 0,5 et 3%. La presence d'au moins 0,8% d'aluminium est 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
avantageuse, et sa teneur est de preference comprise entre 1 et 3,5%. advantageous, and its content is preferably between 1 and 3.5%.
L'alliage selon ['invention peut etre conditionne sous forme de poudre ou d'un melange de poudres d'alliages de compositions differentes, ou sous forme de pions moules a partir de l'alliage fondu, ou agglomeres a partir d'une poudre ou d'un melange de poudres. Cette o poudre a, de preference, une granulometrie inferieure a 1 mm, avec une fraction granulometrique entre 50 et 250 m representarit plus de 35% en poids du total, et une The alloy according to the invention may be packaged in the form of a powder or a mixture of alloy powders of different compositions, or in the form of molded pions from the molten alloy, or agglomerated from a powder. or a mixture of powders. This powder preferably has a particle size of less than 1 mm, with a particle size fraction between 50 and 250 m, representing more than 35% by weight of the total, and
fraction inferieure a 50 m representant moins de 25% du total. fraction less than 50 m representing less than 25% of the total.
Description de ['inventionDescription of the invention
ls Un inoculant etant destine par nature a conduire a l'obtention de fonte dans laquelle le carbone soit present sous forme de graphite, il est apparu souhaitable a la demanderesse de Since an inoculant is intended by nature to lead to the production of pig iron in which the carbon is present in the form of graphite, it has appeared desirable to the plaintiff to
mettre au point un inoculant presentant des proprietes anti-microretassures. develop an inoculant with anti-microburst properties.
Ainsi ont d'abord ete envisages des alliages inoculants a base de FeSi a 75 % additionnes d'un element anti microretassures pouvant etre soit le lanthane, soit le germanium. En ce qui concerne le germanium, les teneurs requises vont de 0,3 a 6%. Pour ce qui est du lanthane, Thus, 75% FeSi-based inoculant alloys were firstly added with an anti-microbissure element that could be either lanthanum or germanium. As regards germanium, the required contents range from 0.3 to 6%. As for lanthanum,
elles vont de 0,3 a 8%, et preferentiellement de 0,5 a 5%. they range from 0.3 to 8%, and preferentially from 0.5 to 5%.
Mais des solutions plus interessantes vent apparues en imaginant des alliages inoculants dans lesquels le meme element puisse remplir plusieurs fonctions: ainsi il est apparu comme particulierement interessant, partant d'un alliage tel que celui decrit dans le brevet US 4432793 (Nobel-Bozel), a base de ferro-silicium et contenant jusqu'a 3% de bismuth, de plomb ou d'antimoine, et jusqu'a 3% de terres rares, de lui aj outer un element anti-micro porosite tel que le lanthane, et de contracter la formule obtenue en optimisant le total du But more interesting solutions emerged by imagining inoculant alloys in which the same element can fulfill several functions: thus it appeared as particularly interesting, starting from an alloy such as that described in US Patent 4432793 (Nobel-Bozel), based on ferrosilicon and containing up to 3% bismuth, lead or antimony, and up to 3% rare earth, add an anti-micro porosite element such as lanthanum, and contract the formula obtained by optimizing the total of
lanthane et des autres terres rares dans un alliage Fe-Si-Bi-La. lanthanum and other rare earths in a Fe-Si-Bi-La alloy.
La demanderesse a d'abord verifie que ces alliages nouveaux anti microporosites, conditionnes dans les granulometries habituelles, a savoir entre 2 et 7 mm, ou entre 0,4 et 2 mm pour traitement en poches, et entre 0,4 et 0,7 mm pour le traitement au jet, presentaient bien de bonnes proprietes en tent qu'inoculants. On a envisage ensuite la preparation de pions The applicant first verified that these new alloys anti microporosites, conditioned in the usual granulometries, namely between 2 and 7 mm, or between 0.4 and 2 mm for treatment in pockets, and between 0.4 and 0.7 mm for jet treatment, had good properties as inoculants. Next, the preparation of pions
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ino culants avec ces memes alliages. Le resultat en terme de reduction de la micro -poro site a with these same alloys. The result in terms of reduction of the micro -poro site has
ete confirme malgre l'apport de bismuth dans la fonte fmale. This is confirmed despite the contribution of bismuth in final melting.
Ainsi de tres bons resultats ont pu etre obtenus avec des pions moules constitues d'alliage de type FeSi contenant: s - de 60 a 80%, et preferentiellement de 72 a 78% de silicium, - de 0,3 a 8%, et preferentiellement de 0,5 a 5% de lanthane, - de 0,2 a 1,5%, et preferentiellement de 0,7 a 1,3% de bismuth, Thus, very good results have been obtained with molded pieces made of FeSi-type alloy containing: s from 60 to 80%, and preferably from 72 to 78% of silicon, from 0.3 to 8%, and preferably from 0.5 to 5% of lanthanum, from 0.2 to 1.5%, and preferentially from 0.7 to 1.3% of bismuth,
- de 0,8 a 5%, et preferentiellement de 1 % a 3,5 % d'aluminium. from 0.8 to 5%, and preferably from 1% to 3.5% of aluminum.
o Exempleso Examples
Pour realiser les exemples decrits ci-dessous, une charge de fonte a ete fondue en four a induction et tratee par le procede Tundish Cover au moyen d'un alliage inoculant habitue! de type FeSiMg a 5% de Mg et 1% de Ca ne contenant pas de terres rares, a la dose de 20 kg pour 1600 kg de fonte. L'analyse de cette fonte liquide eiait la suivante: To perform the examples described below, a cast iron filler was melted in an induction furnace and processed by the Tundish Cover process using a customary inoculant alloy. of FeSiMg 5% Mg and 1% Ca containing no rare earths, at the dose of 20 kg for 1600 kg of cast iron. The analysis of this liquid iron was as follows:
C = 3,7%, Si = 2,6%, Mn = 0,07%, P = 0,03%, S = 0,003%, Mg = 0,038%. C = 3.7%, Si = 2.6%, Mn = 0.07%, P = 0.03%, S = 0.003%, Mg = 0.038%.
La performance au niveau de la macro- comme de la micro-porosite a ete appreciee au moyen Macro-like performance of micro-porosite has been assessed by means of
du test de coulee d'eprouvettes en << V >>. the "V" test piece casting test.
Dans ce test, l'eprouvette est constituee d'un << V >> de hauteur 110 mm, d'angle au sommet In this test, the test specimen consists of a "V" with a height of 110 mm and an apex angle
40 , la largeur des branches du << V >> etant de 20 mm et l'epaisseur de la piece de 20 mm. 40, the width of the branches of the "V" being 20 mm and the thickness of the piece of 20 mm.
Cette geometric donne une largeur de 80 mm au sommet du << V >>, un volume unitaire de 69 cm3, et une masse unitaire de 480 g a 500 g selon la qualite de la fonte. Sur ce type de piece, This geometry gives a width of 80 mm at the top of the "V", a unit volume of 69 cm3, and a unit mass of 480 g to 500 g according to the quality of the cast iron. On this type of piece,
les porosites apparaissent selectivement dans la partie rentrante du << V >>. the porosites appear selectively in the reentrant part of the "V".
Pour apprecier le resultat du test, on decoupe la piece a mi-epaisseur, et l'on examine la coupe par microscopic optique pour evaluer la surface des porosites; le resultat est exprime en To evaluate the result of the test, the part is cut to half-thickness, and the section is examined by optical microscopy to evaluate the surface of the porosites; the result is expressed in
surface relative rapportee a la surface de la coupe. relative area related to the surface of the cut.
Exemple 1Example 1
Une poche de fonte traitee venant de ['operation preliminaire a ete inoculee en poche au moyen d'un alliage inoculant en poudre de granulometrie comprise entre 2 et 10 mm, de composition: << Foundry Grade >>, solde principalement Fe, utilise a la dose de 200 g a la A pouch of processed cast iron from the preliminary operation was inoculated into the pocket by means of an inoculant powder mixture of particle size of between 2 and 10 mm, of composition: "Foundry Grade", predominantly Fe, used a the dose of 200 ga the
tonne de fonte.ton of cast iron.
s 2839082 Cette fonte a ete utilisee pour couler des pieces en V de geometric identique a celle definie dans le test de contrdle, disposees en grappe dans un moule en sable de 36 pieces alimente par s 2839082 This cast iron was used to cast V geometric pieces identical to those defined in the control test, arranged in a cluster in a 36-piece sand mold fed by
un canal d'amenee ou etait dispose un filtre constitue d'une mousse refractaire. a supply channel where a filter constituted of a refractory foam was provided.
Les pieces obtenues ont ete examinees par microscopic optique sur coupe poke pour determiner la structure du metal en fonction de la profondeur et le niveau de porosite. The resulting pieces were examined by optical microscopic poke cutting to determine the structure of the metal according to the depth and the level of porosity.
Au cceur des branches, la densite des nodules de graphite a ete mesuree a 120/mm2. At the heart of the branches, the density of graphite nodules was measured at 120 / mm2.
La porosite moyenne des pieces a ete evaluee a 2,4%. The average porosity of the pieces was evaluated at 2.4%.
Exemple 2Example 2
Une seconde poche de fonte traitee venant de ['operation preliminaire a ete inoculee en poche au moyen d'un alliage inoculant de granulometrie comprise entre 2 et 10 mm de composition: Si = 75,4%, Al = 0,94%, Ca = 0, 86%, La = 2,2%, Bi = 0,92%, solde principalement Fe, A second treated cast iron bag from the preliminary operation was inoculated into the bag by means of an inoculant alloy with a particle size of between 2 and 10 mm composition: Si = 75.4%, Al = 0.94%, Ca = 0, 86%, La = 2.2%, Bi = 0.92%, balance mainly Fe,
s utilise a la dose de 200 g a la tonne de fonte. It is used at the rate of 200 g per ton of pig iron.
Cette fonte a ete utilisee pour couler des pieces en V de geometric identique a celle definie dans le test de contrble, disposees en grappe dans un moule en sable de 36 pieces alimente par This cast iron was used to cast V geometric pieces identical to those defined in the control test, arranged in a cluster in a 36-piece sand mold fed by
un canal d'amenee ou etait dispose un filtre constitue d'une mousse refractaire. a supply channel where a filter constituted of a refractory foam was provided.
Les pieces obtenues ont ete examinees par microscopic optique sur coupe poke pour determiner la structure du metal en fonction de la profondeur et le niveau de porosite. Au The resulting pieces were examined by optical microscopic poke cutting to determine the structure of the metal according to the depth and the level of porosity. the
caeur des branches, la densite des nodules de graphite a ete comptee a 360/mm2. of the branches, the density of graphite nodules was counted at 360 / mm2.
La porosite moyenne des pieces a ete evaluee a 0,3%. The average porosity of the pieces was estimated at 0.3%.
Exemple 3Example 3
2s Une troisieme poche de fonte traitee venant de ['operation preliminaire a ete utilisee pour couler des pieces en V de geometric identique a celle definie dans le test de contrdle, disposees en grappe dans un moule en sable de 36 pieces alimente par un canal d'amenee ou etait dispose un pion de 25 g constitue d'alliage inoculant pour traitement dans le motile, de composition: A third pocket of processed cast iron from the preliminary operation was used to cast geometric V-pieces identical to those defined in the control test, arranged in a cluster in a 36-piece sand mold fed by a control channel. a 25 g counter made of inoculant alloy for treatment in the motile, of composition:
Si = 73,6%, Al = 3,92%, Ca = 0,78%, La = 2,1%, Bi = 0,97%, solde principalement Fe. If = 73.6%, Al = 3.92%, Ca = 0.78%, La = 2.1%, Bi = 0.97%, mainly balance Fe.
Les pieces obtenues ont ete examinees par microscopic optique sur coupe poke pour determiner la structure du metal en fonction de la profondeur et le niveau de porosite. Au The resulting pieces were examined by optical microscopic poke cutting to determine the structure of the metal according to the depth and the level of porosity. the
caeur des branches, la densite des nodules de graphite a ete comptee a 320/mm2. of the branches, the density of the graphite nodules was counted at 320 / mm2.
6 28390826 2839082
La porosite moyenne des pieces a ete evaluee a 0,2%. The average porosity of the pieces was evaluated at 0.2%.
7 28390827 2839082
Rev en d icatio n s s 1. Alliage inoculant pour fonte de moulage, contenant (en poids) de 0,005 a 3% d'un element du groupe bismuth, plomb et antimoine, de 0,3 a 10% de metaux du groupe des terres rares et eventuellement de l'aluminium jusqu'a 5% et du calcium jusquta 1,5%, le reste etant du ferro-silicium, caracterise en ce que le lanthane constitue plus de 90% des Rev en d icatio nss 1. Inoculant alloy for cast iron, containing (by weight) 0.005 to 3% of a bismuth, lead and antimony group, 0.3 to 10% rare earth metals and possibly aluminum up to 5% and calcium up to 1.5%, the rest being ferro-silicon, characterized in that lanthanum constitutes more than 90% of the
metaux des terres rares entrant dans sa composition. rare earth metals used in its composition.
2. Alliage selon la revendication 1, caracterise en ce qu'il contient de 0,3 a 8% de lanthane 2. Alloy according to claim 1, characterized in that it contains from 0.3 to 8% of lanthanum
et de 0,2 a 1,5% de bismuth.and 0.2 to 1.5% bismuth.
3. Alliage selon l'une des revendications 1 ou 2, caracterise en ce que sa teneur en bismuth 3. Alloy according to one of claims 1 or 2, characterized in that its bismuth content
est comprise entre 0,7 et 1,3%.is between 0.7 and 1.3%.
4. Alliage selon l'une des revendications 1 a 3, caracterise en ce que sa teneur en lanthane 4. Alloy according to one of claims 1 to 3, characterized in that its lanthanum content
est comprise entre 0,5 et 5%.is between 0.5 and 5%.
5. Alliage selon l'une des revendications 1 a 4, caracterise en ce que sa teneur en aluminium 5. Alloy according to one of claims 1 to 4, characterized in that its aluminum content
est comprise entre 0,8 et 5%.is between 0.8 and 5%.
6. Alliage selon la revendication 5, caracterise en ce que sa teneur en aluminium est 6. Alloy according to claim 5, characterized in that its aluminum content is
comprise entre 1 et 3,5%.between 1 and 3.5%.
2s2s
7. Alliage selon l'une des revendications 1 a 6, caracterise en ce qu'il est conditionne en 7. Alloy according to one of claims 1 to 6, characterized in that it is conditioned in
poudre.powder.
8. Alliage selon l'une des revendications 1 a 6, caracterise en ce qu'il est conditionne sous 8. Alloy according to one of claims 1 to 6, characterized in that it is conditioned under
forme de pions pour traitement << dans le moule >>. form of pions for "in the mold" treatment.
9. Alliage selon la revendication 8, caracterise en ce que le pion est obtenu par moulage de 9. Alloy according to claim 8, characterized in that the pin is obtained by molding of
l'alliage fondu.the molten alloy.
8 28390828 2839082
10. Alliage selon la revendication 8, caracterise en ce que le pion est obtenu par 10. Alloy according to claim 8, characterized in that the pion is obtained by
agglomeration d'une poudre.agglomeration of a powder.
11. Alliage selon la revendication 10, caracterise en ce que la granulometrie de la poudre est s < 1 mm, la fraction granulometrique comprise entre 50 et 250,um representant plus de 11. Alloy according to claim 10, characterized in that the particle size of the powder is s <1 mm, the particle size fraction between 50 and 250, um representing more than
% en poids du total, et la fraction inferieure a 50 m moins de 25%. % by weight of the total, and the fraction less than 50 m less than 25%.
12. Alliage selon l'une des revendications 10 ou 11, caracterise en ce que la composition 12. Alloy according to one of claims 10 or 11, characterized in that the composition
moyenne de l'alliage est obtenue par melange de poudres d'alliages de compositions average of the alloy is obtained by mixing powders of alloys with compositions
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0205385A FR2839082B1 (en) | 2002-04-29 | 2002-04-29 | ANTI MICRORETASSURE INOCULATING ALLOY FOR TREATMENT OF MOLD SHAPES |
US10/511,264 US20050180876A1 (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
JP2004501648A JP2005528522A (en) | 2002-04-29 | 2003-04-24 | Inoculated alloys to prevent micro sinkholes for casting pig iron processing |
AU2003265514A AU2003265514A1 (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
KR10-2004-7017384A KR20040097396A (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
PCT/FR2003/001295 WO2003093514A2 (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
CA002484036A CA2484036A1 (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
BR0309658-0A BR0309658A (en) | 2002-04-29 | 2003-04-24 | Cast Iron Inoculant Alloy |
EP03740659A EP1499750A2 (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
MXPA04010671A MXPA04010671A (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings. |
CN038154552A CN1665941A (en) | 2002-04-29 | 2003-04-24 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
ZA2004/08584A ZA200408584B (en) | 2002-04-29 | 2004-10-22 | Inoculation alloy against micro-shrinkage cracking for treating cast iron castings |
NO20045177A NO20045177L (en) | 2002-04-29 | 2004-11-26 | Inoculation alloy for the treatment of cast iron particles against cracking by micro-shrinkage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0205385A FR2839082B1 (en) | 2002-04-29 | 2002-04-29 | ANTI MICRORETASSURE INOCULATING ALLOY FOR TREATMENT OF MOLD SHAPES |
Publications (2)
Publication Number | Publication Date |
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FR2839082A1 true FR2839082A1 (en) | 2003-10-31 |
FR2839082B1 FR2839082B1 (en) | 2004-06-04 |
Family
ID=28800032
Family Applications (1)
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FR0205385A Expired - Lifetime FR2839082B1 (en) | 2002-04-29 | 2002-04-29 | ANTI MICRORETASSURE INOCULATING ALLOY FOR TREATMENT OF MOLD SHAPES |
Country Status (13)
Country | Link |
---|---|
US (1) | US20050180876A1 (en) |
EP (1) | EP1499750A2 (en) |
JP (1) | JP2005528522A (en) |
KR (1) | KR20040097396A (en) |
CN (1) | CN1665941A (en) |
AU (1) | AU2003265514A1 (en) |
BR (1) | BR0309658A (en) |
CA (1) | CA2484036A1 (en) |
FR (1) | FR2839082B1 (en) |
MX (1) | MXPA04010671A (en) |
NO (1) | NO20045177L (en) |
WO (1) | WO2003093514A2 (en) |
ZA (1) | ZA200408584B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2997962A1 (en) * | 2012-11-14 | 2014-05-16 | Ferropem | INOCULATING ALLOY FOR THICK PIECES IN CAST IRON |
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FR2855186B1 (en) * | 2003-05-20 | 2005-06-24 | Pechiney Electrometallurgie | INOCULATING PRODUCTS CONTAINING BISMUTH AND RARE EARTHS |
US20130056398A1 (en) * | 2006-12-08 | 2013-03-07 | Visys Nv | Apparatus and method for inspecting and sorting a stream of products |
CN102814491B (en) * | 2012-09-09 | 2013-06-12 | 吉林大学 | High-strength gray cast iron enhancer and strengthening treatment process thereof |
US20140345557A1 (en) * | 2013-05-23 | 2014-11-27 | Caterpillar Inc. | Thermal Spray Coated Engine Valve for Increased Wear Resistance |
SI3510394T1 (en) * | 2016-09-12 | 2022-02-28 | Snam Alloys Pvt Ltd, R&D Unit | A non-magnesium process to produce compacted graphite iron (cgi) |
CN106544462B (en) * | 2016-10-25 | 2018-06-29 | 嘉善蓝欣涂料有限公司 | A kind of nodular cast iron inoculant and its preparation method and application |
CN107841588A (en) * | 2017-12-13 | 2018-03-27 | 南京浦江合金材料股份有限公司 | A kind of the sial lanthanum nucleating agent and its preparation technology of anti-iron casting shrinkage porosite |
NO20172061A1 (en) | 2017-12-29 | 2019-07-01 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
CN114317864B (en) * | 2022-03-17 | 2022-06-24 | 勤威(天津)工业有限公司 | Smelting process for reducing shrinkage porosity in nodular cast iron |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2997962A1 (en) * | 2012-11-14 | 2014-05-16 | Ferropem | INOCULATING ALLOY FOR THICK PIECES IN CAST IRON |
WO2014076404A1 (en) * | 2012-11-14 | 2014-05-22 | Ferropem | Inoculant alloy for thick cast-iron parts |
Also Published As
Publication number | Publication date |
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JP2005528522A (en) | 2005-09-22 |
KR20040097396A (en) | 2004-11-17 |
MXPA04010671A (en) | 2004-12-13 |
WO2003093514A3 (en) | 2004-04-01 |
CA2484036A1 (en) | 2003-11-13 |
WO2003093514A2 (en) | 2003-11-13 |
EP1499750A2 (en) | 2005-01-26 |
AU2003265514A1 (en) | 2003-11-17 |
US20050180876A1 (en) | 2005-08-18 |
BR0309658A (en) | 2005-02-22 |
ZA200408584B (en) | 2005-12-28 |
NO20045177L (en) | 2004-11-26 |
FR2839082B1 (en) | 2004-06-04 |
CN1665941A (en) | 2005-09-07 |
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