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WO1995024508A1 - Agent d'inoculation pour la fabrication de fonte et son procede d'obtention - Google Patents

Agent d'inoculation pour la fabrication de fonte et son procede d'obtention Download PDF

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Publication number
WO1995024508A1
WO1995024508A1 PCT/NO1995/000029 NO9500029W WO9524508A1 WO 1995024508 A1 WO1995024508 A1 WO 1995024508A1 NO 9500029 W NO9500029 W NO 9500029W WO 9524508 A1 WO9524508 A1 WO 9524508A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
inoculant
cast iron
iron
base alloy
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
Application number
PCT/NO1995/000029
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English (en)
Inventor
Torbjørn SKALAND
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.)
Elkem ASA
Original Assignee
Elkem ASA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elkem ASA filed Critical Elkem ASA
Publication of WO1995024508A1 publication Critical patent/WO1995024508A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron
    • C21C1/105—Nodularising additive agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys

Definitions

  • the present invention relates to a ferrosilicon based inoculant for the manufacture of cast iron with lamellar, compacted or spheriodal graphite and to a method for production of the inoculant.
  • Cast iron is typically produced in a cupola or induction furnaces, and generally has about 2 to 4 percent carbon.
  • the carbon is intimately mixed in with the iron and the form which the carbon takes in the solidified cast iron is very important to the characteristics of the cast iron. If the carbon takes the form of iron carbide, then the cast iron is referred to as white cast iron and has the physical characteristics of being hard and brittle which in certain applications is undesirable. If the carbon takes the form of graphite, the cast iron is soft and machinable and is referred to as gray cast iron.
  • Graphite may occur in cast iron in the lamellar, compacted or spheroidal forms and variations thereof.
  • the spheroidal form produces the highest strength and most ductile form of cast iron.
  • the form that the graphite takes as well as the amount of graphite versus iron carbide. can be controlled with certain additives that promote the formation of graphite during the solidification of cast iron. These additives are referred to as inoculants and their addition to the cast iron as inoculation.
  • inoculants additives that promote the formation of graphite during the solidification of cast iron.
  • inoculants additives that promote the formation of graphite during the solidification of cast iron.
  • iron carbide suppressants It is thought that calcium and certain other elements suppress the formation of iron carbide and promote the formation of graphite. A majority of inoculants contain calcium. The addition of these iron carbide suppressants is usually facilitated by the addition of a ferrosilicon alloy and probably the most widely used ferrosilicon alloys are the high silicon alloy containing 75 to 80 % silicon and the low silicon alloy containing 45 to 50 % silicon.
  • the supression of carbide formation is associated by the nucleating properties of the inoculant.
  • nucleating properties it is understood the number of nuclei formed by an inoculant. A high number of nuclei formed improve the inoculation effectiveness and improves the carbide supression. Further a high nucleation rate may also give better resistance to fading of the inoculating effect during prolonged holding time of the molten iron after inoculation.
  • the present invention relates to an inoculant for the manufacture of cast iron with lamellar, compacted or spheroidal graphite wherein said inoculant comprises between 40 and 80 % by weight of silicon, between 0.5 and 10 % by weight of calcium and/or strontium and/or barium, less than 4 % by weight of aluminium, 0 - 10 % by weight of manganese and/or titanium and/or zirconium, between 0.5 and 10 % by weight of oxygen in the form of one or more metal oxides, the balance being iron.
  • the inoculant is in the form of a solid mixture of a ferrosilicon based alloy and the metal oxide.
  • the inoculant is in the form of a ferrosilicon based alloy containing the metal oxide.
  • the inoculant according to the present invention preferably comprises 0.5 to 5 % by weight of manganese and/or titanium and/or zirconium.
  • the metal oxide is selected among FeO, Fe2 ⁇ 3, Fe3 ⁇ 4, Si ⁇ 2, MnO, MgO, AI2O3, Ti ⁇ 2 and CaSi ⁇ 2.
  • the oxygen content of the inoculant is preferably between 1 and 6 9. by weight.
  • the inoculant according to the present invention increases the number of nuclei formed when the inoculant is added to cast iron, thus obtaining an improved supression of iron carbide formation using the same amount of inoculant as with conventional inoculants, or obtaining the same iron carbide suppression using less inoculant than when using conventional inoculants.
  • the present invention relates to a method for producing an inoculant for the manufacture of cast iron with lamellar, compacted or spheroidal graphite, comprising providing a base alloy comprising 40 to 80 % by weight of silicon, 0.5 to 10 % by weight of calcium and/or strontium and/or barium, 0 - 10 % by weight of manganese and/or titanium and/or zirconium, less than 4 % by weight of aluminium, the balance being iron, and adding 0.5 to 10 °I ⁇ by weight of oxygen in the form of one or more metal oxides to the base alloy.
  • the metal oxides are mixed with the base alloy by mechanical mixing of solid base alloy particles and solid metal oxide particles.
  • the mechanical mixing can be carried out in any conventional mixing apparatus which gives a substantially homogeneous mixing, such as for example a rotating drum.
  • the metal oxides are supplied to a melt of the base alloy whereafter the melt is solidified.
  • the metal oxides are preferably added to the stream of molten base alloy when pouring the alloy into casting moulds.
  • the metal oxides may be added in the casting moulds before pouring molten base alloy into the moulds.
  • the four inoculants A through D produced in example 1 were used for inoculation of a cast iron containing 3.7 % by weight of carbon, 2.4 % by weight of silicon, 0.1 % by weight of manganese 0.025 % by weight of phosphorus, 0.005 % sulphur and 0.050 % by weight of magnesium.
  • two tests were made using a conventional base inoculant containing 75 % ferrosilicon, 1 % by weight of calcium, 1 % by weight of barium and 1 % by weight of aluminium.
  • inoculant was added to the cast iron melts. After casting nodule densities in 5 mm sections of the castings were determined. The results are shown in table 2.
  • Heat No. 1 and 2 refer to tests with the conventional inoculant, while heat No. 3 - 6 in table 2 refer to tests with inoculants A through D according to table 1 in example 1.
  • Table 2 Table 2
  • the inoculants according to the present invention give an increased nodule density compared to the conventional inoculant of up to about 70 %.
  • the four inoculants E through H produced in sample 3 were used for inoculation of a cast iron containing 3.7 % by weight of carbon, 2.4 % by weight of silicon, 0.1 % by weight of manganese, 0.025 % by weight of phosphorus, 0.005 % sulphur and 0.050 % by weight of magnesium.
  • a conventional base inoculant containing 75 % ferrosilicon, 1 % by weight of calcium, 1 % by weight of barium and 1 % by weight of aluminium.
  • inoculant was added to the cast iron melt. After casting nodule densities in 5 mm sections of the casting were determined. The results are shown in table 4.
  • Heat No. 1 refer to the test with the conventional inoculant
  • heat No. 2 - 5 in table 4 refer to tests with inoculants E through H according to table 3 in example 3.

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

Abstract

L'invention porte sur un agent d'inoculation pour la fabrication de fonte à graphite lamellaire, compacté ou sphéroïde comprenant entre 40 et 80 % de silice, entre 0,5 et 10 % en poids de calcium et/ou de strontium et/ou de baryum, moins de 4 % en poids d'aluminium, 0 à 10 % en poids de manganèse et/ou titane et/ou zirconium, entre 0,5 et 10 % en poids d'oxygène sous forme d'un ou de plusieurs oxydes métalliques, et le reste étant du fer. L'invention porte, en outre, sur un procédé de production d'un agent d'inoculation pour la fabrication de fonte à graphite lamellaire, compacté ou sphéroïde consistant à produire un alliage de base comportant entre 40 et 80 % de silice, 0,5 et 10 % en poids de calcium et/ou de strontium et/ou de baryum, moins de 4 % en poids d'aluminium, de 0 à 10 % en poids de manganèse et/ou titane et/ou zirconium, le reste étant du fer, et à ajouter à l'alliage de base entre 0,5 et 10 % en poids d'oxygène sous forme d'un ou de plusieurs oxydes métalliques.
PCT/NO1995/000029 1994-03-09 1995-02-13 Agent d'inoculation pour la fabrication de fonte et son procede d'obtention Ceased WO1995024508A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO940819A NO179079C (no) 1994-03-09 1994-03-09 Ympemiddel for stöpejern og fremgangsmåte for fremstilling av ympemiddel
NO940819 1994-03-09

Publications (1)

Publication Number Publication Date
WO1995024508A1 true WO1995024508A1 (fr) 1995-09-14

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ID=19896909

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1995/000029 Ceased WO1995024508A1 (fr) 1994-03-09 1995-02-13 Agent d'inoculation pour la fabrication de fonte et son procede d'obtention

Country Status (2)

Country Link
NO (1) NO179079C (fr)
WO (1) WO1995024508A1 (fr)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834577A1 (fr) * 1996-09-30 1998-04-08 Peter H. Grelling Procédé et dispositif pour le traitement de metal fondu et une fonte ou un acier produit par ce procédé
WO1999029911A1 (fr) * 1997-12-08 1999-06-17 Elkem Asa Inoculant pour fonte et procede de production dudit inoculant
RU2172782C1 (ru) * 1997-12-08 2001-08-27 Элкем Аса Модификатор чугуна и способ получения модификатора чугуна
EP1249504A3 (fr) * 2001-04-11 2003-08-13 Georg Fischer Automobilguss GmbH Additif d'inoculation pour le conditionnement de fontes liquides traitées à l'aide de magnésium dans un convertisseur
US6793707B2 (en) 2002-01-10 2004-09-21 Pechiney Electrometallurgie Inoculation filter
RU2277589C2 (ru) * 2004-09-02 2006-06-10 ООО "НЭК им. Корниенко Э.Н." Способ получения модифицирующей лигатуры для чугуна
WO2008012492A1 (fr) * 2006-07-25 2008-01-31 Foseco International Limited Procédé amélioré de production de fer ductile
CN103394656A (zh) * 2013-08-15 2013-11-20 张传海 一种铸造用复合孕育剂的制备方法
CN104195413A (zh) * 2014-08-18 2014-12-10 成都宏源铸造材料有限公司 一种薄壁急冷件孕育剂及其制备方法和在铸造领域的应用
CN104195414A (zh) * 2014-08-18 2014-12-10 成都宏源铸造材料有限公司 一种硅粒孕育剂的制备方法及其应用
CN104195416A (zh) * 2014-08-18 2014-12-10 成都宏源铸造材料有限公司 一种球墨铸铁孕育剂及其制备方法和应用
CN104946960A (zh) * 2014-08-18 2015-09-30 成都宏源铸造材料有限公司 一种球墨铸铁用管模粉的制备方法及其应用
CN104946959A (zh) * 2014-08-18 2015-09-30 成都宏源铸造材料有限公司 一种薄壁急冷件孕育剂及其制备方法和应用
US20150284830A1 (en) * 2012-11-14 2015-10-08 Ferropem Inoculant alloy for thick cast-iron parts
CN105033196A (zh) * 2014-08-14 2015-11-11 成都宏源铸造材料有限公司 一种灰铸铁孕育剂的制备方法及其应用
CN105200303A (zh) * 2015-10-30 2015-12-30 成都宏源铸造材料有限公司 一种薄壁急冷件孕育剂的制备方法及其应用
CN107419050A (zh) * 2017-06-23 2017-12-01 常熟市兄弟玻璃模具有限公司 一种球墨铸铁玻璃模具孕育剂
WO2018004356A1 (fr) 2016-06-30 2018-01-04 Elkem As Inoculant de fonte et procédé de production d'inoculant de fonte
WO2019132672A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'inoculant de fonte
WO2019132668A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'un inoculant de fonte
WO2019132671A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'inoculant de fonte
WO2019132669A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'un inoculant de fonte
WO2019132670A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'inoculant de fonte
CN110629106A (zh) * 2019-11-08 2019-12-31 沈阳工业大学 一种利用纳米SiO2颗粒增强球墨铸铁材料的方法
CN110983165A (zh) * 2019-12-31 2020-04-10 三祥新材股份有限公司 一种球墨铸铁用孕育剂及其制备方法
US11098383B2 (en) 2016-06-30 2021-08-24 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
NO20210413A1 (en) * 2021-03-30 2022-10-03 Elkem Materials Ferrosilicon vanadium and/or niobium alloy, production of a ferrosilicon vanadium and/or niobium alloy, and the use thereof
NO20210412A1 (en) * 2021-03-30 2022-10-03 Elkem Materials Ferrosilicon vanadium and/or niobium alloy, production of a ferrosilicon vanadium and/or niobium alloy, and the use thereof
WO2023230694A1 (fr) * 2022-06-03 2023-12-07 Instituto Hercílio Randon Fer fondu comprenant des particules de niobium et procédé d'obtention d'un fer fondu
CN119859773A (zh) * 2025-03-24 2025-04-22 成都宏源铸造材料有限公司 一种含稀土元素的高效铸铁孕育剂

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10767238B2 (en) * 2016-04-15 2020-09-08 Elkem Asa Gray cast iron inoculant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232042A2 (fr) * 1986-01-21 1987-08-12 Elkem Metals Company Inoculant pour fonte ou fonte ductile
EP0524444A1 (fr) * 1991-07-20 1993-01-27 SKW Trostberg Aktiengesellschaft Agent pour le traitement de fontes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232042A2 (fr) * 1986-01-21 1987-08-12 Elkem Metals Company Inoculant pour fonte ou fonte ductile
EP0524444A1 (fr) * 1991-07-20 1993-01-27 SKW Trostberg Aktiengesellschaft Agent pour le traitement de fontes

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834577A1 (fr) * 1996-09-30 1998-04-08 Peter H. Grelling Procédé et dispositif pour le traitement de metal fondu et une fonte ou un acier produit par ce procédé
WO1999029911A1 (fr) * 1997-12-08 1999-06-17 Elkem Asa Inoculant pour fonte et procede de production dudit inoculant
US6102983A (en) * 1997-12-08 2000-08-15 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
RU2172782C1 (ru) * 1997-12-08 2001-08-27 Элкем Аса Модификатор чугуна и способ получения модификатора чугуна
CN1085256C (zh) * 1997-12-08 2002-05-22 埃尔凯姆公司 铸铁孕育剂及铸铁孕育剂的生产方法
EP1249504A3 (fr) * 2001-04-11 2003-08-13 Georg Fischer Automobilguss GmbH Additif d'inoculation pour le conditionnement de fontes liquides traitées à l'aide de magnésium dans un convertisseur
US6793707B2 (en) 2002-01-10 2004-09-21 Pechiney Electrometallurgie Inoculation filter
RU2277589C2 (ru) * 2004-09-02 2006-06-10 ООО "НЭК им. Корниенко Э.Н." Способ получения модифицирующей лигатуры для чугуна
WO2008012492A1 (fr) * 2006-07-25 2008-01-31 Foseco International Limited Procédé amélioré de production de fer ductile
EP1887090A1 (fr) * 2006-07-25 2008-02-13 Foseco International Limited Procédé amélioré pour la production de fer ductile
RU2426796C2 (ru) * 2006-07-25 2011-08-20 Фосеко Интернэшнл Лимитед Улучшенный способ получения ковкого чугуна
EA015944B1 (ru) * 2006-07-25 2011-12-30 Фосеко Интернэшнл Лимитед Способ получения ковкого чугуна
US8297340B2 (en) 2006-07-25 2012-10-30 Foseco International Limited Method of producing ductile iron
TWI421349B (zh) * 2006-07-25 2014-01-01 Foseco Int 製造鑄鐵之改良方法
KR101402581B1 (ko) 2006-07-25 2014-05-30 포세코 인터내셔널 리미티드 개선된 연성 주철 제조 방법
US20150284830A1 (en) * 2012-11-14 2015-10-08 Ferropem Inoculant alloy for thick cast-iron parts
CN103394656A (zh) * 2013-08-15 2013-11-20 张传海 一种铸造用复合孕育剂的制备方法
CN105033196A (zh) * 2014-08-14 2015-11-11 成都宏源铸造材料有限公司 一种灰铸铁孕育剂的制备方法及其应用
CN104946960A (zh) * 2014-08-18 2015-09-30 成都宏源铸造材料有限公司 一种球墨铸铁用管模粉的制备方法及其应用
CN104946959A (zh) * 2014-08-18 2015-09-30 成都宏源铸造材料有限公司 一种薄壁急冷件孕育剂及其制备方法和应用
CN104195414A (zh) * 2014-08-18 2014-12-10 成都宏源铸造材料有限公司 一种硅粒孕育剂的制备方法及其应用
CN104195413A (zh) * 2014-08-18 2014-12-10 成都宏源铸造材料有限公司 一种薄壁急冷件孕育剂及其制备方法和在铸造领域的应用
CN104195416A (zh) * 2014-08-18 2014-12-10 成都宏源铸造材料有限公司 一种球墨铸铁孕育剂及其制备方法和应用
CN105200303A (zh) * 2015-10-30 2015-12-30 成都宏源铸造材料有限公司 一种薄壁急冷件孕育剂的制备方法及其应用
US11098383B2 (en) 2016-06-30 2021-08-24 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
WO2018004356A1 (fr) 2016-06-30 2018-01-04 Elkem As Inoculant de fonte et procédé de production d'inoculant de fonte
US11846000B2 (en) 2016-06-30 2023-12-19 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
CN107419050A (zh) * 2017-06-23 2017-12-01 常熟市兄弟玻璃模具有限公司 一种球墨铸铁玻璃模具孕育剂
US11479828B2 (en) 2017-12-29 2022-10-25 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
US11486012B2 (en) 2017-12-29 2022-11-01 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
WO2019132670A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'inoculant de fonte
US11932913B2 (en) 2017-12-29 2024-03-19 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
WO2019132672A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'inoculant de fonte
WO2019132669A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'un inoculant de fonte
CN111727264A (zh) * 2017-12-29 2020-09-29 埃尔凯姆公司 铸铁孕育剂以及用于生产铸铁孕育剂的方法
CN111742065A (zh) * 2017-12-29 2020-10-02 埃尔凯姆公司 铸铁孕育剂以及用于生产铸铁孕育剂的方法
WO2019132671A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'inoculant de fonte
US11708618B2 (en) 2017-12-29 2023-07-25 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
US11486011B2 (en) 2017-12-29 2022-11-01 Elkem Asa Cast iron inoculant and method for production of cast iron inoculant
WO2019132668A1 (fr) 2017-12-29 2019-07-04 Elkem Asa Inoculant de fonte et procédé de production d'un inoculant de fonte
CN110629106B (zh) * 2019-11-08 2020-07-24 沈阳工业大学 一种利用纳米SiO2颗粒增强球墨铸铁材料的方法
CN110629106A (zh) * 2019-11-08 2019-12-31 沈阳工业大学 一种利用纳米SiO2颗粒增强球墨铸铁材料的方法
CN110983165A (zh) * 2019-12-31 2020-04-10 三祥新材股份有限公司 一种球墨铸铁用孕育剂及其制备方法
NO20210412A1 (en) * 2021-03-30 2022-10-03 Elkem Materials Ferrosilicon vanadium and/or niobium alloy, production of a ferrosilicon vanadium and/or niobium alloy, and the use thereof
NO20210413A1 (en) * 2021-03-30 2022-10-03 Elkem Materials Ferrosilicon vanadium and/or niobium alloy, production of a ferrosilicon vanadium and/or niobium alloy, and the use thereof
WO2023230694A1 (fr) * 2022-06-03 2023-12-07 Instituto Hercílio Randon Fer fondu comprenant des particules de niobium et procédé d'obtention d'un fer fondu
CN119859773A (zh) * 2025-03-24 2025-04-22 成都宏源铸造材料有限公司 一种含稀土元素的高效铸铁孕育剂

Also Published As

Publication number Publication date
NO179079B (no) 1996-04-22
NO940819D0 (no) 1994-03-09
NO179079C (no) 1996-07-31
NO940819L (no) 1995-09-11

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