GB247941A - A new or improved process for the manufacture of a highly valuable cast iron with the finest distribution of graphite - Google Patents

A new or improved process for the manufacture of a highly valuable cast iron with the finest distribution of graphite

Info

Publication number
GB247941A
GB247941A GB3715/26A GB371526A GB247941A GB 247941 A GB247941 A GB 247941A GB 3715/26 A GB3715/26 A GB 3715/26A GB 371526 A GB371526 A GB 371526A GB 247941 A GB247941 A GB 247941A
Authority
GB
United Kingdom
Prior art keywords
iron
graphite
per cent
cast iron
temperature
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
GB3715/26A
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.)
Gelsenkirchener Bergwerks AG
Original Assignee
Gelsenkirchener Bergwerks AG
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 Gelsenkirchener Bergwerks AG filed Critical Gelsenkirchener Bergwerks AG
Publication of GB247941A publication Critical patent/GB247941A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C21C1/08—Manufacture of cast-iron

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

247,941. Gelsenkirchener Bergwerks- Akt.-Ges. Feb. 21, 1925, [Convention date]. Drawings to Specification. Purifying and refining; annealing. - In the production of a cast iron with the finest distribution of graphite, the molten iron is heated over (e.g. 100 to 200‹ C. over) the temperature above which the formation of carbide decreases and the formation of graphite increases, this temperature being about 300-500‹ C. higher than the temperature of solidification. In an example, a east iron containing 3.23 per cent of carbon has, after heating at 1600‹ C., 3.12 per cent of graphite and 0.11 per cent of carbide. A small amount of iron mav be so treated and then mixed with iron which is heated to its melting point or a little higher. The iron so treated is particularly suitable for casting in permanent moulds especially by the centrifugal process. The Specification as open to inspection under Sect. 91 (3) (a) states that the casting may be annealed by heating to 850-875‹ C. for a short time and then cooling slowly. This subjectmatter does not appear in the Specification as accepted.
GB3715/26A 1925-02-21 1926-02-09 A new or improved process for the manufacture of a highly valuable cast iron with the finest distribution of graphite Expired GB247941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE247941X 1925-02-21

Publications (1)

Publication Number Publication Date
GB247941A true GB247941A (en) 1927-06-09

Family

ID=5935477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3715/26A Expired GB247941A (en) 1925-02-21 1926-02-09 A new or improved process for the manufacture of a highly valuable cast iron with the finest distribution of graphite

Country Status (1)

Country Link
GB (1) GB247941A (en)

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