GB450841A - Methods or processes for the heat-treatment of iron, steel and alloy steels - Google Patents

Methods or processes for the heat-treatment of iron, steel and alloy steels

Info

Publication number
GB450841A
GB450841A GB195135A GB195135A GB450841A GB 450841 A GB450841 A GB 450841A GB 195135 A GB195135 A GB 195135A GB 195135 A GB195135 A GB 195135A GB 450841 A GB450841 A GB 450841A
Authority
GB
United Kingdom
Prior art keywords
calcium
iron
hydrogen
steel
alloy steels
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
GB195135A
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.)
BIRMINGHAM ELECTR FURNACES Ltd
Original Assignee
BIRMINGHAM ELECTR FURNACES Ltd
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 BIRMINGHAM ELECTR FURNACES Ltd filed Critical BIRMINGHAM ELECTR FURNACES Ltd
Priority to GB195135A priority Critical patent/GB450841A/en
Publication of GB450841A publication Critical patent/GB450841A/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

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)
  • Silicon Compounds (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

Carbon and other impurities, such as nitrogen, sulphur, phosphorus, and oxygen, are removed from iron, steel and alloy steels by heating them at 600-1100 DEG C. in an atmosphere of hydrogen or hydrogen-containing gas in the presence of metallic calcium or a calcium-containing substance such as calcium silicide or calcium hydride which decomposes the compounds formed by the combination of hydrogen with the impurities and forms stable calcium compounds which are incapable of reacting with the iron &c. In an example, a silicon steel containing 4 per cent of silicon and 0,04 of carbon was treated for 8 hours at a temperature of 950 DEG C. in a hydrogen atmosphere and in the presence of metallic calcium. Reference has been directed by the Comptroller to Specification 260,646, [Class 72].
GB195135A 1935-01-21 1935-01-21 Methods or processes for the heat-treatment of iron, steel and alloy steels Expired GB450841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB195135A GB450841A (en) 1935-01-21 1935-01-21 Methods or processes for the heat-treatment of iron, steel and alloy steels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB195135A GB450841A (en) 1935-01-21 1935-01-21 Methods or processes for the heat-treatment of iron, steel and alloy steels

Publications (1)

Publication Number Publication Date
GB450841A true GB450841A (en) 1936-07-21

Family

ID=9730922

Family Applications (1)

Application Number Title Priority Date Filing Date
GB195135A Expired GB450841A (en) 1935-01-21 1935-01-21 Methods or processes for the heat-treatment of iron, steel and alloy steels

Country Status (1)

Country Link
GB (1) GB450841A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262289A (en) * 1991-12-03 1993-06-16 Rmi Titanium Co Surface deoxidation of metal castings.
WO1996034118A1 (en) * 1995-04-22 1996-10-31 Institut für Festkörper- und Werkstofforschung Dresden e.V. Method of making semi-finished metal products
US5932032A (en) * 1996-10-22 1999-08-03 Institut Fuer Festkoerper-Und Werkstofforschung Dresden E.V. Process for the production of solid magnet bodies

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262289A (en) * 1991-12-03 1993-06-16 Rmi Titanium Co Surface deoxidation of metal castings.
GB2262289B (en) * 1991-12-03 1995-01-04 Rmi Titanium Co Removal of oxide layers from titanium castings using an alkaline earth deoxidizing agent
WO1996034118A1 (en) * 1995-04-22 1996-10-31 Institut für Festkörper- und Werkstofforschung Dresden e.V. Method of making semi-finished metal products
US5882445A (en) * 1995-04-22 1999-03-16 Institut Fuer Festkoerper-Und Werkstofforschung Dresden E.V. Method of making semi-finished metal products
US5932032A (en) * 1996-10-22 1999-08-03 Institut Fuer Festkoerper-Und Werkstofforschung Dresden E.V. Process for the production of solid magnet bodies

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