GB1190321A - Method of Producing Malleable Iron - Google Patents

Method of Producing Malleable Iron

Info

Publication number
GB1190321A
GB1190321A GB4516/68A GB451668A GB1190321A GB 1190321 A GB1190321 A GB 1190321A GB 4516/68 A GB4516/68 A GB 4516/68A GB 451668 A GB451668 A GB 451668A GB 1190321 A GB1190321 A GB 1190321A
Authority
GB
United Kingdom
Prior art keywords
cast iron
sufficiently long
complete
stage graphitization
malleable iron
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
Application number
GB4516/68A
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.)
BRITISH FURNACES Ltd
Original Assignee
BRITISH FURNACES Ltd
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 BRITISH FURNACES Ltd filed Critical BRITISH FURNACES Ltd
Publication of GB1190321A publication Critical patent/GB1190321A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron
    • C21D5/04—Heat treatments of cast-iron of white cast-iron
    • C21D5/06—Malleabilising
    • C21D5/14—Graphitising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Soft Magnetic Materials (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

1,190,321. Heat-treating cast iron. BRITISH FURNACES Ltd. Jan.29, 1968 [Feb. 6, 1967], No.4516/68. Heading C7A. Ferritic malleable iron is produced from white cast iron containing 2-3% C. and 0À8-1À7% Si by isothermally annealing the cast iron, first at 1700-1750‹ F. for sufficiently long to complete first stage graphitization, then at 1275-1325‹ F. for sufficiently long to partially complete second stage graphitization, and finally at 1225-1275‹ F. for sufficiently long to complete second stage graphitization. Prior processes involve cooling from the first anneal, first rapidly to 1400‹ F., then slowly to 1200‹ F. An example of cast iron castings is specified containing 2À5% C., 1À45% Si, 0À36% Mn, 0À16% S., 0À002% B., 0À02% Cr and 0À005% Bi.
GB4516/68A 1967-02-06 1968-01-29 Method of Producing Malleable Iron Expired GB1190321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61402267A 1967-02-06 1967-02-06

Publications (1)

Publication Number Publication Date
GB1190321A true GB1190321A (en) 1970-05-06

Family

ID=24459582

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4516/68A Expired GB1190321A (en) 1967-02-06 1968-01-29 Method of Producing Malleable Iron

Country Status (6)

Country Link
US (1) US3511721A (en)
BE (1) BE710059A (en)
DE (1) DE1583998A1 (en)
ES (1) ES350148A1 (en)
FR (1) FR1554145A (en)
GB (1) GB1190321A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6024804A (en) * 1997-05-02 2000-02-15 Ohio Cast Products, Inc. Method of preparing high nodule malleable iron and its named product

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1801742A (en) * 1927-07-29 1931-04-21 Ind Furnace Corp Process for graphitizing castings of white cast iron
US3365335A (en) * 1964-12-04 1968-01-23 Dayton Malleable Iron Co Method for producing pearlitic malleable iron

Also Published As

Publication number Publication date
DE1583998A1 (en) 1971-01-14
BE710059A (en) 1968-05-30
ES350148A1 (en) 1969-04-16
FR1554145A (en) 1969-01-17
US3511721A (en) 1970-05-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees