GB876958A - Improvements in and relating to chromium-containing addition agents - Google Patents

Improvements in and relating to chromium-containing addition agents

Info

Publication number
GB876958A
GB876958A GB29285/59A GB2928559A GB876958A GB 876958 A GB876958 A GB 876958A GB 29285/59 A GB29285/59 A GB 29285/59A GB 2928559 A GB2928559 A GB 2928559A GB 876958 A GB876958 A GB 876958A
Authority
GB
United Kingdom
Prior art keywords
chromium
carbon
iron
remainder
combined
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
GB29285/59A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB876958A publication Critical patent/GB876958A/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
    • C22C35/00—Master alloys for iron or steel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A sintered addition agent suitable for the electric-furnace production of chromium-containing steels or ferro-alloys consisting of oxides and carbides of iron and chromium and free carbon, has a composition such that 15 to 40% is combined chromium, (of which 15 to 80% is acid soluble and the remainder acid insoluble), from 12 to 60% is combined iron (of which at least 85% is acid soluble and the remainder acid insoluble), sufficient free carbon so that the total carbon is at least 5% in excess over that necessary to give a 1 to 1 gram-atom ratio of carbon to oxygen in the agglomerate, the remainder being the carbon and oxygen combined with the iron and chromium therein and incidental impurities. The addition agent may be prepared from a comminuted mixture of chrome ore, iron ore and carbon in suitable proportions heated in an inert atmosphere at 1000 DEG C. to 1300 DEG C., the iron and chromium oxides being partially-reduced to the carbides in the solid state, and the product cooled, if desired. The comminuted mixture may be mixed with a non-interfering binder and pelletized prior to heating.
GB29285/59A 1958-09-03 1959-08-27 Improvements in and relating to chromium-containing addition agents Expired GB876958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US876958XA 1958-09-03 1958-09-03

Publications (1)

Publication Number Publication Date
GB876958A true GB876958A (en) 1961-09-06

Family

ID=22206720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29285/59A Expired GB876958A (en) 1958-09-03 1959-08-27 Improvements in and relating to chromium-containing addition agents

Country Status (1)

Country Link
GB (1) GB876958A (en)

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