GB897159A - Improvements in and relating to the production of high-grade malleable iron castings - Google Patents

Improvements in and relating to the production of high-grade malleable iron castings

Info

Publication number
GB897159A
GB897159A GB1808260A GB1808260A GB897159A GB 897159 A GB897159 A GB 897159A GB 1808260 A GB1808260 A GB 1808260A GB 1808260 A GB1808260 A GB 1808260A GB 897159 A GB897159 A GB 897159A
Authority
GB
United Kingdom
Prior art keywords
castings
grade
relating
production
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
GB1808260A
Inventor
Herbert Mueller
Herbert Tegelhuetter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1808260A priority Critical patent/GB897159A/en
Publication of GB897159A publication Critical patent/GB897159A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

A method of producing malleable cast iron comprises (a) making castings from a white malleable cast iron produced in a cupola furnace; (b) graphitising annealing the castings at 950-1100 DEG C. for 5-20 hours; (c) slow cooling the castings to 800-900 DEG C.; (d) quenching the castings from 800-900 DEG C.; (e) tempering the quenched castings to produce a structure of granular cementite. The treatment may be carried out in a neutral or inert atmosphere or in an atmosphere comprising 17% Co, 25% H2, and the remainder N2 which has a carbon potential of 0,6% at 1014 DEG C.
GB1808260A 1960-05-23 1960-05-23 Improvements in and relating to the production of high-grade malleable iron castings Expired GB897159A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1808260A GB897159A (en) 1960-05-23 1960-05-23 Improvements in and relating to the production of high-grade malleable iron castings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1808260A GB897159A (en) 1960-05-23 1960-05-23 Improvements in and relating to the production of high-grade malleable iron castings

Publications (1)

Publication Number Publication Date
GB897159A true GB897159A (en) 1962-05-23

Family

ID=10106352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1808260A Expired GB897159A (en) 1960-05-23 1960-05-23 Improvements in and relating to the production of high-grade malleable iron castings

Country Status (1)

Country Link
GB (1) GB897159A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3607458A (en) * 1968-05-13 1971-09-21 Dayton Malleable Iron Co The Weldable and wear resistant magnetic ferritic malleable iron and method
EP0302049A1 (en) * 1987-07-27 1989-02-01 Fittings Traisen Gesellschaft m.b.H. Method of heat treating malleable cast iron

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3607458A (en) * 1968-05-13 1971-09-21 Dayton Malleable Iron Co The Weldable and wear resistant magnetic ferritic malleable iron and method
EP0302049A1 (en) * 1987-07-27 1989-02-01 Fittings Traisen Gesellschaft m.b.H. Method of heat treating malleable cast iron
AT391878B (en) * 1987-07-27 1990-12-10 Voest Alpine Ag METHOD FOR TREATING TEMPERATURE

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