GB484662A - Improvements in or relating to the decarbonising of carbon-containing iron or iron alloys - Google Patents

Improvements in or relating to the decarbonising of carbon-containing iron or iron alloys

Info

Publication number
GB484662A
GB484662A GB30048/36A GB3004836A GB484662A GB 484662 A GB484662 A GB 484662A GB 30048/36 A GB30048/36 A GB 30048/36A GB 3004836 A GB3004836 A GB 3004836A GB 484662 A GB484662 A GB 484662A
Authority
GB
United Kingdom
Prior art keywords
iron
grains
furnace
heating
carried out
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
GB30048/36A
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
Publication of GB484662A publication Critical patent/GB484662A/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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

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)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Iron or iron alloys having a low carbon content are produced from pig iron or an iron alloy by granulating the raw material to provide more or less spherical grains and then heating the grains to a temperature below their melting point in an atmosphere adapted to decarbonize the grains without any substantial oxidation of the iron itself. The decarbonizing may be carried out in the presence of a suitable oxidant such as haematite or limestone which produce decarbonizing gases on heating and heated to a temperature of 750-1100 DEG C. or by mixing the grains with iron ore and introducing a reducing gas such as hydrogen or carbon monoxide into the furnace in which the operation is carried out. The grains may be maintained in motion during the operation, e.g. in a rotating internally-heated furnace or by causing them to move downwardly in a vertical furnace in counterflow to the hot gases. The heating of the grains may be carried out in vacuo in an induction furnace or electrically either using the charge as a resistance, a neutral substance such as sand, lime or quartz then being added to the charge, or by using electric resistances disposed within the furnace. The Specification as open to inspection under Sect. 91 referred to the treatment of carbon-containing metals and alloys but this subject-matter does not appear in the Specification as accepted.
GB30048/36A 1935-11-04 1936-11-04 Improvements in or relating to the decarbonising of carbon-containing iron or iron alloys Expired GB484662A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE484662X 1935-11-04

Publications (1)

Publication Number Publication Date
GB484662A true GB484662A (en) 1938-05-04

Family

ID=20310526

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30048/36A Expired GB484662A (en) 1935-11-04 1936-11-04 Improvements in or relating to the decarbonising of carbon-containing iron or iron alloys

Country Status (1)

Country Link
GB (1) GB484662A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5846349A (en) * 1994-12-09 1998-12-08 Ford Global Technologies, Inc. Low alloy steel powder for plasma deposition having solid lubricant properties

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5846349A (en) * 1994-12-09 1998-12-08 Ford Global Technologies, Inc. Low alloy steel powder for plasma deposition having solid lubricant properties

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