US3661566A - Process for the treatment of nodular cast iron - Google Patents

Process for the treatment of nodular cast iron Download PDF

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Publication number
US3661566A
US3661566A US862343A US3661566DA US3661566A US 3661566 A US3661566 A US 3661566A US 862343 A US862343 A US 862343A US 3661566D A US3661566D A US 3661566DA US 3661566 A US3661566 A US 3661566A
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United States
Prior art keywords
percent
treatment
nodulating
inoculating
alloy
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Expired - Lifetime
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US862343A
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English (en)
Inventor
Jean-Claude G Percheron
Louis Septier
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Pechiney SA
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Pechiney SA
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    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/12—Roofs; Roof construction with regard to insulation formed in bays, e.g. sawtooth roofs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Definitions

  • Such nodulating treatment consists of introducing pure magnesium or an alloy of magnesium, such as an Fe-Si-Mg alloy, into the molten iron.
  • the inoculating treatment consists of the addition of silicon or an alloy containing silicon, such as an Fe-Si alloy, to the molten iron.
  • the efficiency of the nodulating or inoculating metal or alloy can be improved by the addition of elements. For example, calcium, cesium, yttrium and rare earths are known to improve nodulation while barium is known to improve the effect of the inoculating alloys.
  • the described inoculating-nodulating combination of barium and boron has a marked ferritization effect on the iron matrix and, for a given composition of iron, it is possible to obtain a more or less ferritized matrix, depending upon the proportions of the nodulating and inoculating alloy selected.
  • the nodulating alloy is selected to contain an amount of boron such that the ratio of weight percent magnesium and the weight percent of boron meets the following conditions:
  • the inoculating alloy contains barium in the ratio of weight percent silicon and weight percent of barium to meet the following conditions:
  • Examples 1, 2 and 3 do not represent the practice of this invention.
  • Example 1 illustrates the prior art and Examples 2 and 3 illustrate the use of boron alone or barium alone.
  • Examples 4, 5 and 6 represent the practice of this invention wherein the nodulating alloy contains boron and the inoculating alloy contains barium.
  • Example 7 illustrates the non-equivalency between barium and calcium insofar as the practice of this invention is concerned.
  • FIGS. 1, 2, 3 and 4 of the accompanying drawing are photomicrographs of the cast metals of Examples 1, 2, 3 and 4.
  • the metal is cast after 9 minutes.
  • EXAMPLE 2 This example is the same as Example 1 except that 2.250 kg of Fe-Si-Mg-B (Mg 9.1 percent, B 0.48 percent) and 0.375 kg of Fe-Si (Si 75 percent) are used.
  • EXAMPLE 4 The process is the same as in Example I but, in accordance with the practice of the invention, use is made of 2.250 kg of Fe-Si-Mg-B (Mg 9.1 percent, B 0.48 percent) and 0.420 kg of Fe-Si-Ba (Si 59.5 percent, Ba 9.8 percent).
  • R ultimate strength, lrg/mm. 43.4 44. 2 48 51.8.
  • E elastic limit kgjmrni 25. 6 26. 3 28.2.
  • the mechanical properties, determined on the as cast test pieces are:
  • the castings obtained have a perfectly nodular graphite structure and a highly ferritic matrix.
  • the mechanical properties in the as cast condition are:
  • fraction A 0.420 kg of Fe-Si-Ba alloy (Si 61 percent, Ba 9.6 percent). This fraction, which represents the practice of this invention, gives castings which are as good as those of Example 4.
  • fraction B 0.420 kg of the alloy Fe-Si-Ca (Si 62.4 percent, Ca 10.3 percent).
  • the castings obtained have a good surface appearance but present a slight piping tendency.
  • Table 11 clearly shows, the castings made with fraction B contain more carbides and less ferrite.
  • Fraction l3 Composition alter nodulating and inoculating trcatnmnt:
  • a process for obtaining a nodular graphite structure in cast irons wherein a nodulating alloy containing Mg and boron in the ratio of weight percentages within the range of 10 to and an inoculating alloy containing silicon and barium in the ratio of weight percentages within the range of 3 to 60 are successively introduced into molten cast iron.
  • nodulating alloy contains magnesium and boron in the ratio of weight percentages within the range of 15 to 30.
  • nodulating alloy contains magnesium and boron in the ratio in weight percentage within the range of 15 to 30 and in which the inoculating alloy contains silicon and barium in the ratio of weight percentage within the range of 4 to 12.
US862343A 1968-10-02 1969-09-30 Process for the treatment of nodular cast iron Expired - Lifetime US3661566A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR168451 1968-10-02

Publications (1)

Publication Number Publication Date
US3661566A true US3661566A (en) 1972-05-09

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US862343A Expired - Lifetime US3661566A (en) 1968-10-02 1969-09-30 Process for the treatment of nodular cast iron

Country Status (12)

Country Link
US (1) US3661566A (nl)
JP (1) JPS495089B1 (nl)
AT (1) AT317952B (nl)
BE (1) BE739760A (nl)
CH (1) CH505906A (nl)
ES (1) ES372026A1 (nl)
FR (1) FR1589187A (nl)
GB (1) GB1283206A (nl)
LU (1) LU59549A1 (nl)
NL (1) NL163566C (nl)
NO (1) NO124166B (nl)
SE (1) SE365246B (nl)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955973A (en) * 1974-05-20 1976-05-11 Deere & Company Process of making nodular iron and after-treating alloy utilized therein
US4224064A (en) * 1979-04-27 1980-09-23 Union Carbide Corporation Method for reducing iron carbide formation in cast nodular iron
US5008074A (en) * 1990-04-26 1991-04-16 American Alloys, Inc. Inoculant for gray cast iron
US6024804A (en) * 1997-05-02 2000-02-15 Ohio Cast Products, Inc. Method of preparing high nodule malleable iron and its named product
WO2008012492A1 (en) * 2006-07-25 2008-01-31 Foseco International Limited Improved method of producing ductile iron

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450395A (en) * 1944-08-02 1948-09-28 Crane Co Malleable cast iron
US2676097A (en) * 1951-03-08 1954-04-20 Vanadium Corp Of America Composition for addition to cast iron or steel
US2778732A (en) * 1954-10-12 1957-01-22 Union Carbide & Carbon Corp Boron-containing ferrosilicon
US2816829A (en) * 1955-11-07 1957-12-17 Ford Motor Co Nodular iron manufacture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450395A (en) * 1944-08-02 1948-09-28 Crane Co Malleable cast iron
US2676097A (en) * 1951-03-08 1954-04-20 Vanadium Corp Of America Composition for addition to cast iron or steel
US2778732A (en) * 1954-10-12 1957-01-22 Union Carbide & Carbon Corp Boron-containing ferrosilicon
US2816829A (en) * 1955-11-07 1957-12-17 Ford Motor Co Nodular iron manufacture

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955973A (en) * 1974-05-20 1976-05-11 Deere & Company Process of making nodular iron and after-treating alloy utilized therein
US4224064A (en) * 1979-04-27 1980-09-23 Union Carbide Corporation Method for reducing iron carbide formation in cast nodular iron
US5008074A (en) * 1990-04-26 1991-04-16 American Alloys, Inc. Inoculant for gray cast iron
US6024804A (en) * 1997-05-02 2000-02-15 Ohio Cast Products, Inc. Method of preparing high nodule malleable iron and its named product
WO2008012492A1 (en) * 2006-07-25 2008-01-31 Foseco International Limited Improved method of producing ductile iron
EP1887090A1 (en) * 2006-07-25 2008-02-13 Foseco International Limited Improved method of producing ductile iron
US20100294452A1 (en) * 2006-07-25 2010-11-25 Foseco International Limited Method of Producing Ductile Iron
EA015944B1 (ru) * 2006-07-25 2011-12-30 Фосеко Интернэшнл Лимитед Способ получения ковкого чугуна
CN101473047B (zh) * 2006-07-25 2012-06-20 福塞科国际有限公司 生产延性铁的改进方法
US8297340B2 (en) * 2006-07-25 2012-10-30 Foseco International Limited Method of producing ductile iron

Also Published As

Publication number Publication date
FR1589187A (nl) 1970-03-23
LU59549A1 (nl) 1970-05-04
NO124166B (nl) 1972-03-13
AT317952B (de) 1974-09-25
DE1949380B2 (de) 1975-12-04
ES372026A1 (es) 1972-03-01
BE739760A (nl) 1970-04-02
JPS495089B1 (nl) 1974-02-05
DE1949380A1 (de) 1970-04-09
CH505906A (fr) 1971-04-15
NL163566B (nl) 1980-04-15
SE365246B (nl) 1974-03-18
NL163566C (nl) 1980-09-15
GB1283206A (en) 1972-07-26
NL6914817A (nl) 1970-04-06

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