EP1575724B1 - Produkte zum schutz von stranggussformen für gusseiserne rohre - Google Patents

Produkte zum schutz von stranggussformen für gusseiserne rohre Download PDF

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Publication number
EP1575724B1
EP1575724B1 EP03715029.9A EP03715029A EP1575724B1 EP 1575724 B1 EP1575724 B1 EP 1575724B1 EP 03715029 A EP03715029 A EP 03715029A EP 1575724 B1 EP1575724 B1 EP 1575724B1
Authority
EP
European Patent Office
Prior art keywords
product according
alloy
magnesium
product
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03715029.9A
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English (en)
French (fr)
Other versions
EP1575724A3 (de
EP1575724A2 (de
Inventor
Thomas Margaria
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.)
Ferroglobe France SAS
Original Assignee
Ferropem SAS
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Filing date
Publication date
Application filed by Ferropem SAS filed Critical Ferropem SAS
Publication of EP1575724A2 publication Critical patent/EP1575724A2/de
Publication of EP1575724A3 publication Critical patent/EP1575724A3/de
Application granted granted Critical
Publication of EP1575724B1 publication Critical patent/EP1575724B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/007—Treatment of the fused masses in the supply runners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B22D13/101—Moulds
    • B22D13/102—Linings for moulds

Definitions

  • the invention relates to a product in the form of powder, for the protection of casting molds cast iron pipes manufactured by centrifugal casting; the casting molds used are commonly referred to as "shells".
  • the coatings used for the protection of centrifugal casting shells of cast iron pipes were first made of inoculants and powdered refractory materials, as well as mixtures of silica and bentonite, put in place by projection of a suspension aqueous. Such coatings are described for example in the patent US 4,058,153 from Pont-à-Mousson.
  • these products were replaced by powders sprayed dry on the shell before pouring cast iron, a technique referred to as the "dry spray". Whatever the technique used for their installation, these products are used to obtain on the one hand a thermal barrier effect limiting the rise in temperature of the shell and thus contributing to increasing its life, and secondly an inoculating effect on the cast iron so as to control the metallurgical structure of the pipe.
  • inoculate more even if it means slowing the production rate to avoid the final heat treatment, or, on the contrary, to inoculate little, to increase productivity, and to heat-treat the cast iron part downstream.
  • the supply inoculant of the "dry spray” can thus be positioned in rather wide limits, against the other effects asked to the product are the object of requirements more constant.
  • the products used as "dry spray” are therefore generally composed of a mixture of several components, including an inoculant of greater or lesser effectiveness, which can constitute from 30 to 100% of the product, for example a ferro-silicon containing 0.1 to 3% of aluminum and calcium, and an inert mineral filler, for example silica or fluorspar, which can constitute from 0 to 70% of the product.
  • an inoculant of greater or lesser effectiveness which can constitute from 30 to 100% of the product, for example a ferro-silicon containing 0.1 to 3% of aluminum and calcium
  • an inert mineral filler for example silica or fluorspar
  • the patent FR 2612097 (Foseco ) describes the use as a treatment agent of FeSiMg type alloys whose particles are electrically charged by friction.
  • mixtures are in the form of powders of particle size always less than 400 microns, but free of fines.
  • a particle size of between 50 and 200 ⁇ m is well suited.
  • a method of manufacturing a cast iron brake element comprising a step of coating a mold with a nodularizing agent which comprises a ferrosilicon-based alloy which can be combined with a magnesium compound, the nodulating agent being intended to promote the production of ductile iron on the support surface.
  • EP0930113A1 discloses an inoculant alloy based on ferro-silicon which may comprise, in addition to iron and silicon, the following metals: Mn, Zr, Ca, Ba, Sr and / or Al, in a casting process of casting in molds .
  • the subject of the invention is a powder product for the protection of centrifugal casting molds of cast iron pipes, comprising a mixture of particles of an inoculating metal alloy, optionally inert mineral powders, and particles of a strongly reducing metal. and volatile to. the temperature of the liquid iron, said metal being selected from magnesium, calcium and magnesium and / or calcium alloys which contain less than 10% Fe.
  • These products comprise an inoculant alloy, for example based on ferro-silicon, or a mixture of inoculant alloys, optionally a mineral filler, and a reducing agent, at a content of between 0.3 and 18%, consisting of volatile metal at the temperature of liquid iron, which is calcium, or magnesium, or an alloy containing at least one of these metals.
  • Silicon alloys are particularly suitable, especially CaSi type alloys. It is thus possible advantageously to use alloys of composition (by weight): Si: 58-65%, Ca: 27-35%, Fe: 2-7%, Al: 0.4-2%.
  • ferrous alloys typically containing more than 10% iron, of the FeSiCa type, often called CaSiFer and containing (by weight): Si: 51-58% Ca: 16-20% Fe: 23-27% Al: 0, 3-1, 5% as well as alloys of FeSiMg type containing (by weight): Si: 47-53% Fe: 35-48% Mg: 2-12% Al: 0.2-1.5%
  • Ca: 0.1-1.5% rare earths: 0-2% give contrary disappointing results, clearly behind those obtained with the mixtures according to the invention.
  • the reducing metals or alloys used are not used alone, but in the form of a premix with an inert substance, preferably calcium fluoride, magnesium fluoride or a mixture of these two fluorides.
  • an inert substance preferably calcium fluoride, magnesium fluoride or a mixture of these two fluorides.
  • the content of highly reducing metal or metal alloy in the premix is preferably between 15 and 60%.
  • the particle size of the products is less than 400 ⁇ m, and preferably less than 250 ⁇ m. Fine particles smaller than 40 ⁇ m, and preferably less than 50 ⁇ m, are excluded to avoid dust emissions during use.
  • a mixture according to the prior art was prepared from the following constituents: 85% of ferro-silicon at 75.2% Si, 1.3% Ca and 0.45% Al, at a particle size between 50 and 200 ⁇ m, and 15% of fluorspar of particle size between 10 and 150 microns.
  • a mixture according to the invention was prepared from the following constituents: 55% of ferro-silicon with 75.2% of Si, 1.3% of Ca and 0.45% of Al with a particle size of between 50 and 200 ⁇ m, and 45% of a mixture consisting of 1/3 of fluorspar between 10 and 150 ⁇ m, and 2/3 calcium silicide at 60.1% Si, 31.7% Ca and 4.3% Fe.
  • a mixture according to the invention consisting of 3% of the above mixture and 97% of ferro-silicon with 75.2% Si, 1.3% Ca and 0.45% Al of particle size between 50 and 200 ⁇ m.
  • this product gave results judged to be better than those obtained in Examples No. 1 and No. 2; the pipes were demolded after 37 seconds of cooling and on the pipes thus manufactured, a thickness of ferritic cast iron of 30 ⁇ m was noted. The surface condition of the pieces was considered excellent.
  • this product gave results in a net shrinkage compared to those obtained in Example 3; the pipes were demolded after 50 seconds of cooling and, on the pipes thus manufactured, there was a thickness of ferritic cast iron of 35 ⁇ m, and the appearance, on the surface of the pieces, of pits quite unacceptable, of a density of about 25 per m 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (10)

  1. Produkt aus Pulver zum Schutz von Zentrifugalgussformen, die bei der Herstellung von gusseisernen Rohren verwendet werden, dadurch gekennzeichnet, dass es eine Mischung von Partikeln einer Impflegierung auf der Grundlage von Ferrosilicium und Partikeln eines Metalls umfasst, gleichzeitig stark reduzierend und flüchtig bei der Temperatur des geschmolzenen Gusseisens, das ausgewählt ist aus Magnesium, Calcium, Legierungen von Magnesium und/oder Calcium, wobei die Legierungen weniger als 10 % Fe enthalten.
  2. Produkt nach Anspruch 1, dadurch gekennzeichnet, dass die verwendete Impflegierung eine Mischung aus mehreren Impflegierungen ist.
  3. Produkt nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das verwendete reduzierende und flüchtige Metall 0,3 bis 18 Gew% des Produkts darstellt.
  4. Produkt nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Nichteisenlegierung eine SiCa-Legierung ist, die (in Gewicht) Folgendes enthält:
    Si: 58-65 %, Ca: 27-35 %, Fe: 2-7 %, Al: 0,4-2 %.
  5. Produkt nach Anspruch 4, dadurch gekennzeichnet, dass es zwischen 15 und 40 Gew% SiCa-Legierung enthält.
  6. Produkt nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass es zwischen 0,5 und 2 % Magnesium enthält.
  7. Produkt nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass es 0,2 bis 15 % inertes Mineralpulver enthält.
  8. Produkt nach Anspruch 7, dadurch gekennzeichnet, dass das verwendete inerte Mineralpulver ein Calciumfluorid, ein Magnesiumfluorid oder eine Mischung dieser zwei Fluoride ist.
  9. Verfahren zur Herstellung des Produkts nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die reduzierenden und flüchtigen Metalle in die Mischung in Form einer Vormischung mit den inerten Mineralpulvern eingeführt werden.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Metalle von 15 bis 60 Gew% der Vormischung darstellen.
EP03715029.9A 2002-01-25 2003-01-21 Produkte zum schutz von stranggussformen für gusseiserne rohre Expired - Lifetime EP1575724B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0200947A FR2835209B1 (fr) 2002-01-25 2002-01-25 Produits pour la protection des moules de coulee continue des tuyaux de fonte
FR0200947 2002-01-25
PCT/FR2003/000181 WO2003061878A2 (fr) 2002-01-25 2003-01-21 Produits pour la protection des moules de coulee continue des tuyaux de fonte

Publications (3)

Publication Number Publication Date
EP1575724A2 EP1575724A2 (de) 2005-09-21
EP1575724A3 EP1575724A3 (de) 2005-09-28
EP1575724B1 true EP1575724B1 (de) 2018-08-01

Family

ID=27589586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03715029.9A Expired - Lifetime EP1575724B1 (de) 2002-01-25 2003-01-21 Produkte zum schutz von stranggussformen für gusseiserne rohre

Country Status (13)

Country Link
US (1) US7615095B2 (de)
EP (1) EP1575724B1 (de)
JP (2) JP4616941B2 (de)
KR (1) KR101028437B1 (de)
CN (1) CN1705531B (de)
AU (1) AU2003219230B2 (de)
CA (1) CA2474273C (de)
EG (1) EG25080A (de)
ES (1) ES2691019T3 (de)
FR (1) FR2835209B1 (de)
NO (1) NO339697B1 (de)
SA (1) SA03230545B1 (de)
WO (1) WO2003061878A2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090254801A1 (en) * 2001-05-14 2009-10-08 The Mathworks, Inc. Model navigation
US7337102B2 (en) * 2003-12-29 2008-02-26 The Mathworks, Inc. Hierarchical references or links in modeling environments
FR2883495B1 (fr) * 2005-03-22 2008-11-14 Pechiney Electrometallurgie So Produits du type "dry-spray" pour la protection des moules de coulee centrifugee des tuyaux de fonte
FR2884739B1 (fr) * 2005-04-20 2007-06-29 Pechiney Electrometallurgie So Produits du type "dry-spray" pour la protection des moules de coulee centrifugee des tuyaux de fonte, en association avec un produit du type "wet-spray"
DE102006002246A1 (de) * 2006-01-17 2007-07-19 Skw Giesserei Gmbh Impfmittelhaltige Flüssigschlichte auf Wasserbasis
JP5455008B2 (ja) * 2009-03-04 2014-03-26 株式会社栗本鐵工所 遠心鋳造方法
CN102212738B (zh) * 2011-05-26 2012-11-21 成都银河动力有限公司 一种解决离心铸造缸套渣缩孔的生产工艺
US8376024B1 (en) 2011-12-31 2013-02-19 Charles Earl Bates Foundry mold insulating coating
US8833433B2 (en) 2013-01-16 2014-09-16 Charles Earl Bates Foundry mold insulating coating
CN103394633B (zh) * 2013-08-06 2016-08-17 霍山县东胜铸造材料有限公司 一种冒口涂料的制备方法
US11853690B1 (en) 2016-05-31 2023-12-26 The Mathworks, Inc. Systems and methods for highlighting graphical models
FR3089138B1 (fr) 2018-11-29 2021-10-08 Elkem Materials Poudre de moule et revêtement de moule
CN113500171B (zh) * 2021-06-16 2022-07-01 西安理工大学 一种基于石墨球超细化的铁基连铸型材制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612097A1 (fr) * 1987-03-13 1988-09-16 Foseco Int Revetement de moules ou de noyaux pour la coulee de metaux avec des agents de traitement aux ferrosiliciums
US5249619A (en) * 1991-10-30 1993-10-05 Mack Trucks, Inc. Brake element and a preparation process therefor
EP0930113A1 (de) * 1998-01-16 1999-07-21 Pechiney Electrometallurgie Schützendes Pulver für Schleudergussmaschinen zum Giessen von gusseisernen Rohren und Verfahren zur Hertellung des Pulvers

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US1982763A (en) * 1934-01-22 1934-12-04 United States Pipe Foundry Method of casting ingots
US2152717A (en) * 1936-12-24 1939-04-04 Centrifugal Pipe Corp Method of casting in a centrifugal mold
US2245994A (en) * 1938-01-05 1941-06-17 Henry E Mcwane Casting apparatus and method
GB930391A (en) * 1960-04-20 1963-07-03 Shigeyuki Okazaki Improvements in a casting method of producing metal ingots having homogeneous and smooth surfaces
US3415307A (en) * 1966-03-03 1968-12-10 United States Pipe Foundry Process for casting ductile iron
US3588028A (en) * 1968-07-05 1971-06-28 Tokyo Shibaura Electric Co Coated metal mold
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FR2278429A1 (fr) * 1974-07-18 1976-02-13 Pont A Mousson Procede et dispositif pour couler des tuyaux en fonte a graphite spheroidal par centrifugation
JPS5372731A (en) * 1976-12-09 1978-06-28 Kubota Ltd Method of coating metal mold for centrifugal casting
JPS5570459A (en) * 1978-11-22 1980-05-27 Kubota Ltd Production of spheroidal graphite caste iron pipe
JPS6028577B2 (ja) * 1980-01-14 1985-07-05 株式会社クボタ 両鍔管の遠心鋳造方法
US4313758A (en) * 1980-10-01 1982-02-02 Union Carbide Corporation Method for adding unalloyed magnesium metal to molten cast iron
JPS591498B2 (ja) * 1980-11-26 1984-01-12 株式会社クボタ 球状黒船鋳鉄管の製造方法
JPS60250865A (ja) * 1984-05-28 1985-12-11 Kubota Ltd Ｃｖ黒鉛鋳鉄管の製造方法
AT392228B (de) * 1988-11-28 1991-02-25 Brugger Gottfried Verfahren und vorrichtung zum schleudergiessen von kupfer oder dessen legierungen, insbesondere bronze
EP0410603A1 (de) * 1989-07-26 1991-01-30 Foseco International Limited Giessen von flüssigem Gusseisen und dabei verwendete Filter
JPH09271922A (ja) * 1996-04-05 1997-10-21 Toyota Motor Corp 樹脂中子を用いた鋳造方法

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
FR2612097A1 (fr) * 1987-03-13 1988-09-16 Foseco Int Revetement de moules ou de noyaux pour la coulee de metaux avec des agents de traitement aux ferrosiliciums
US5249619A (en) * 1991-10-30 1993-10-05 Mack Trucks, Inc. Brake element and a preparation process therefor
EP0930113A1 (de) * 1998-01-16 1999-07-21 Pechiney Electrometallurgie Schützendes Pulver für Schleudergussmaschinen zum Giessen von gusseisernen Rohren und Verfahren zur Hertellung des Pulvers

Also Published As

Publication number Publication date
ES2691019T3 (es) 2018-11-23
EG25080A (en) 2011-07-31
CA2474273C (fr) 2012-04-10
AU2003219230B2 (en) 2007-12-13
FR2835209B1 (fr) 2004-06-18
CN1705531B (zh) 2011-08-17
US20050066771A1 (en) 2005-03-31
KR20040072737A (ko) 2004-08-18
WO2003061878A3 (fr) 2005-08-11
EP1575724A3 (de) 2005-09-28
WO2003061878A2 (fr) 2003-07-31
NO20043541L (no) 2004-08-25
SA03230545B1 (ar) 2008-09-02
FR2835209A1 (fr) 2003-08-01
KR101028437B1 (ko) 2011-04-15
US7615095B2 (en) 2009-11-10
JP2006507125A (ja) 2006-03-02
JP2009226484A (ja) 2009-10-08
NO339697B1 (no) 2017-01-23
EP1575724A2 (de) 2005-09-21
CA2474273A1 (fr) 2003-07-31
CN1705531A (zh) 2005-12-07
JP4616941B2 (ja) 2011-01-19

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