GB1279115A - High purity ferrous material and method of making it - Google Patents

High purity ferrous material and method of making it

Info

Publication number
GB1279115A
GB1279115A GB44868/69A GB4486869A GB1279115A GB 1279115 A GB1279115 A GB 1279115A GB 44868/69 A GB44868/69 A GB 44868/69A GB 4486869 A GB4486869 A GB 4486869A GB 1279115 A GB1279115 A GB 1279115A
Authority
GB
United Kingdom
Prior art keywords
separator
atmosphere
high purity
iron
limestone
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
GB44868/69A
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.)
Armco Inc
Original Assignee
Armco Inc
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 Armco Inc filed Critical Armco Inc
Publication of GB1279115A publication Critical patent/GB1279115A/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • C21D8/0284—Application of a separating or insulating coating
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
    • C21D8/1283—Application of a separating or insulating coating
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0257—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

1279115 Desulphurizing iron and steel; annealing ARMCO STEEL CORP 11 Sept 1969 [3 Oct 1968] 44868/69 Headings C7Dand C7N High purity ferrous material is obtained from ingot iron or low carbon steel having a manganese content of not more than 0.5%, which is reduced to a thickness not exceeding 0.2 inch and then annealed at 1040‹ -1370‹ C. for 24 to 140 hours in hydrogen or a hydrogen-containing atmosphere such that nitrogen pick-up does not occur, the atmosphere in either case having a dew-point such that iron oxide formation does not occur. Prior to annealing the metal is coated with a separator, or a mechanical separator may be used; the separator may be lime, limestone, magnesia, dolomite or mixtures of these, with a preferred coating thickness of 0.002 inch, but it may be advantageous to include coarser particles of limestone or alumina to facilitate gas circulation. In addition to reducing the sulphur content to 0À004% or less, the atmosphere may be chosen to simultaneously reduce the nitrogen to 0À004% or less.
GB44868/69A 1968-10-03 1969-09-11 High purity ferrous material and method of making it Expired GB1279115A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76492368A 1968-10-03 1968-10-03

Publications (1)

Publication Number Publication Date
GB1279115A true GB1279115A (en) 1972-06-28

Family

ID=25072171

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44868/69A Expired GB1279115A (en) 1968-10-03 1969-09-11 High purity ferrous material and method of making it

Country Status (7)

Country Link
US (1) US3615903A (en)
CA (1) CA921809A (en)
DE (1) DE1949458A1 (en)
FR (1) FR2019834A1 (en)
GB (1) GB1279115A (en)
NL (1) NL6914864A (en)
SE (1) SE344761B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790266A (en) * 1971-10-21 1973-02-15 Cspeli Femmu PROCESS FOR MANUFACTURING COLD ROLLED ELECTROMAGNETIC STEEL STRIPS AND SHEETS
US3879234A (en) * 1971-12-22 1975-04-22 Merck & Co Inc Lithia-containing frit additives for MgO coatings
US3819426A (en) * 1972-07-31 1974-06-25 Nat Steel Corp Process for producing non-silicon bearing electrical steel
US3932235A (en) * 1973-07-24 1976-01-13 Westinghouse Electric Corporation Method of improving the core-loss characteristics of cube-on-edge oriented silicon-iron
US4475369A (en) * 1982-08-18 1984-10-09 Sumitomo Metal Industries, Ltd. Method for producing clean cold strip
FR2694303B1 (en) * 1992-07-30 1994-10-21 Metalimphy Process for the development of soft magnetic alloys with very high permeability and alloys resulting therefrom.
JP3706765B2 (en) * 1999-05-27 2005-10-19 兼次 安彦 Hot rolled electrical steel sheet having excellent magnetic properties and corrosion resistance and method for producing the same
WO2013127515A1 (en) * 2012-02-27 2013-09-06 Tata Steel Nederland Technology B.V. Method for manufacturing a steel product
KR101850133B1 (en) * 2016-10-26 2018-04-19 주식회사 포스코 Annealing separating agent composition for grain oriented electrical steel sheet, grain oriented electrical steel sheet, and method for manufacturing grain oriented electrical steel sheet

Also Published As

Publication number Publication date
FR2019834A1 (en) 1970-07-10
US3615903A (en) 1971-10-26
NL6914864A (en) 1970-04-07
CA921809A (en) 1973-02-27
DE1949458A1 (en) 1970-04-23
SE344761B (en) 1972-05-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee