GB1095036A - Improvements in or relating to a method of making cast-iron - Google Patents

Improvements in or relating to a method of making cast-iron

Info

Publication number
GB1095036A
GB1095036A GB16758/65A GB1675865A GB1095036A GB 1095036 A GB1095036 A GB 1095036A GB 16758/65 A GB16758/65 A GB 16758/65A GB 1675865 A GB1675865 A GB 1675865A GB 1095036 A GB1095036 A GB 1095036A
Authority
GB
United Kingdom
Prior art keywords
nickel
cooled
heat
cast
per hour
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
GB16758/65A
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.)
Teves Thompson and Co GmbH
Original Assignee
Teves Thompson and Co GmbH
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 Teves Thompson and Co GmbH filed Critical Teves Thompson and Co GmbH
Publication of GB1095036A publication Critical patent/GB1095036A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium
    • C22C37/08—Cast-iron alloys containing chromium with nickel

Landscapes

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

Abstract

Iron containing austenite stabilizers such as nickel, chromium, vanadium or manganese and a low content of carbon and silicon is cast to have an austenitic-martensitic microstructure, without ledeburite or graphite, and is then heat-treated to precipitate carbon from the martensite in the form of globular secondary graphite. Particularly suitable compositions are those containing <TABS:1095036/C6-C7/1> When nickel is present a nickel-rich segregate may be formed at the grain boundaries as a result of heat-treatment, thereby increasing abrasion resistance. Heat treatment of the cast material may consist of an anneal at 900 DEG C. for 45 minutes followed by furnace cooling, or the casting after solidification may be cooled at not more than 250 DEG C. per hour. Alternatively to produce a sorbitic structure and improve the elastic limit of the material it may be annealed for 1 hour at 800 DEG -1000 DEG C., cooled in air to 600 DEG C., heated to 750 DEG C. and finally cooled at 100 DEG C. per hour.
GB16758/65A 1964-04-30 1965-04-21 Improvements in or relating to a method of making cast-iron Expired GB1095036A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0026121 1964-04-30

Publications (1)

Publication Number Publication Date
GB1095036A true GB1095036A (en) 1967-12-13

Family

ID=7552558

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16758/65A Expired GB1095036A (en) 1964-04-30 1965-04-21 Improvements in or relating to a method of making cast-iron

Country Status (3)

Country Link
US (1) US3360407A (en)
CH (1) CH453715A (en)
GB (1) GB1095036A (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984458A (en) * 1933-07-28 1934-12-18 Electro Metallurg Co Cast iron alloy articles
US2185894A (en) * 1937-01-25 1940-01-02 Hultgren Axel Gustaf Emanuel Method of producing malleable iron
US2227217A (en) * 1940-05-09 1940-12-31 Electro Metallurg Co Production of malleable iron
US2438267A (en) * 1942-03-23 1948-03-23 Timken Roller Bearing Co Graphitic steel
US2901384A (en) * 1952-02-20 1959-08-25 Renault Method for treating cast iron castings
US3013911A (en) * 1953-11-18 1961-12-19 Renault Malleable cast iron compositions
DE1121639B (en) * 1956-03-16 1962-01-11 Renault Process for the production of cast iron pieces with a maximum thickness of 25 mm and very high toughness
US2883281A (en) * 1957-12-06 1959-04-21 Timken Roller Bearing Co Air hardening graphitic steel

Also Published As

Publication number Publication date
CH453715A (en) 1968-03-31
US3360407A (en) 1967-12-26

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