US3905809A - Alloy for making ductile iron - Google Patents

Alloy for making ductile iron Download PDF

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Publication number
US3905809A
US3905809A US434403A US43440374A US3905809A US 3905809 A US3905809 A US 3905809A US 434403 A US434403 A US 434403A US 43440374 A US43440374 A US 43440374A US 3905809 A US3905809 A US 3905809A
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United States
Prior art keywords
nodularizing
alloy
composition
elements
percent
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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
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US434403A
Inventor
Andrew B Malizio
Martin A Rice
Harry F Brooks
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.)
WALTER INDUSTRIES Inc
United States Pipe and Foundry Co LLC
Original Assignee
United States Pipe and Foundry Co LLC
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Publication date
Priority claimed from US00189670A external-priority patent/US3799767A/en
Application filed by United States Pipe and Foundry Co LLC filed Critical United States Pipe and Foundry Co LLC
Priority to US434403 priority Critical patent/US3905809B2/en
Application granted granted Critical
Publication of US3905809A publication Critical patent/US3905809A/en
Publication of US3905809B1 publication Critical patent/US3905809B1/en
Assigned to WALTER INDUSTRIES, INC. reassignment WALTER INDUSTRIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UNITED STATES PIPE AND FOUNDRY COMPANY
Assigned to UNITED STATES PIPE AND FOUNDRY COMPANY, A DELAWARE CORPORATION reassignment UNITED STATES PIPE AND FOUNDRY COMPANY, A DELAWARE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WALTER INDUSTRIES, INC.
Publication of US3905809B2 publication Critical patent/US3905809B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

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

Abstract

A process for producing ductile iron comprising adding to a bath of low-sulfur cast iron, a material containing at least two graphite-nodularizing elements. The additive material contains each nodularizing element in relatively low concentrations so that after dissolution in the bath the concentration of nodularizing elements remaining is sufficient to produce the desired structure, but the concentration of any one element is, of itself, insufficient to produce nodular (spheroidal) graphite.

Claims (4)

1. A NODULARIZING COMPOSITION FOR USE IN THE PRODUCTION OF NODULAR CAST IRON COMPRISING AT LEAST TWO NODULARIZING ELEMENTS IN A SILICON-IRON ALLOY OR MIXTURE OF SILICON-IRON ALLOYS, SAID ELEMENTS SELECTED FROM THE GROUPS CONSISTING OF MAGNESIUM, CERIUM, YTTRIUM, LANTHANUM, NEODYMIUM AND PRASEODYMIUM WITH EACH BEING PRESENT IN THE ALLOY OR ALLOYS IN AN AMOUNT OF FROM ABOUT 1 TO 3 PERCENT BY WEIGHT OF THE COMPOSTION AND THE TOTAL AMOUNT OF NODULARIZING ELEMENTS IN THE COMPOSITION NOT EXCEEDING MORE THAN ABOUT 12 PERCENT.
2. The composition of claim 1 wherein the nodularizing elements are magnesium and cerium in substantially equal amounts.
3. A nodularizing composition for use in the production of nodular cast iron comprising at least two silicon-iron alloys, one alloy containing magnesium in an amount of from about 1 to 3 percent by weight and the other alloy comprising at least one nodularizing element selected from the group consisting of cerium, yttrium, lanthanum, neodymium and praseodymium with each being present in an amount of from about 1 to 3 percent by weight of the alloy and the total amount of nodularizing elements in the composition not exceeding more than about 12 percent.
4. A nodularizing composition for use in the production of nodular cast iron comprising at least two nodularizing elements and one of said at least two nodularizing elements being magnesium and being present in a silicon-iron alloy from about 1 to 3 percent by weight of the composition and the remainder of said at least two nodularizing elements selected from the group consisting of cerium, yttrium, lanthanum, neodymium and praseodymium, each being present in about the same amount as said magnesium and the total amount of nodularizing elements in the composition not exceeding more than about 12 percent.
US434403 1971-10-15 1974-01-18 Alloy for making ductile iron Expired - Lifetime US3905809B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US434403 US3905809B2 (en) 1971-10-15 1974-01-18 Alloy for making ductile iron

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00189670A US3799767A (en) 1971-10-15 1971-10-15 Process and alloy for making ductile iron
US434403 US3905809B2 (en) 1971-10-15 1974-01-18 Alloy for making ductile iron

Publications (3)

Publication Number Publication Date
US3905809A true US3905809A (en) 1975-09-16
US3905809B1 US3905809B1 (en) 1987-08-18
US3905809B2 US3905809B2 (en) 1990-05-29

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US434403 Expired - Lifetime US3905809B2 (en) 1971-10-15 1974-01-18 Alloy for making ductile iron

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5186233A (en) * 1991-04-04 1993-02-16 Hitachi Metals, Ltd. Method of producing spheroidal graphite cast iron article
CN109837454A (en) * 2019-04-08 2019-06-04 河北恒工机械装备科技有限公司 A kind of big cross section high-intensity and high-tenacity spheroidal graphite cast-iron profile and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814559A (en) * 1953-04-23 1957-11-26 James A Clark Process for the production of nodular cast iron
US2816829A (en) * 1955-11-07 1957-12-17 Ford Motor Co Nodular iron manufacture
US3336118A (en) * 1964-11-09 1967-08-15 Alloy Metal Products Inc Magnesium alloy for cast iron
US3492118A (en) * 1966-05-24 1970-01-27 Foote Mineral Co Process for production of as-cast nodular iron

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814559A (en) * 1953-04-23 1957-11-26 James A Clark Process for the production of nodular cast iron
US2816829A (en) * 1955-11-07 1957-12-17 Ford Motor Co Nodular iron manufacture
US3336118A (en) * 1964-11-09 1967-08-15 Alloy Metal Products Inc Magnesium alloy for cast iron
US3492118A (en) * 1966-05-24 1970-01-27 Foote Mineral Co Process for production of as-cast nodular iron

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5186233A (en) * 1991-04-04 1993-02-16 Hitachi Metals, Ltd. Method of producing spheroidal graphite cast iron article
CN109837454A (en) * 2019-04-08 2019-06-04 河北恒工机械装备科技有限公司 A kind of big cross section high-intensity and high-tenacity spheroidal graphite cast-iron profile and preparation method thereof

Also Published As

Publication number Publication date
US3905809B1 (en) 1987-08-18
US3905809B2 (en) 1990-05-29

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Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)

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Effective date: 19870130

B1 Reexamination certificate first reexamination
RR Request for reexamination filed

Effective date: 19870629

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Owner name: WALTER INDUSTRIES, INC., 1500 NORTH DALE MABRY HIG

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:UNITED STATES PIPE AND FOUNDRY COMPANY;REEL/FRAME:004890/0562

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Owner name: WALTER INDUSTRIES, INC., FLORIDA

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WALTER INDUSTRIES, INC.;REEL/FRAME:004873/0973

Effective date: 19880517

Owner name: UNITED STATES PIPE AND FOUNDRY COMPANY, A DELAWARE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WALTER INDUSTRIES, INC.;REEL/FRAME:004873/0973

Effective date: 19880517