GB544678A - Process of making electrical sheets of silicon steel - Google Patents

Process of making electrical sheets of silicon steel

Info

Publication number
GB544678A
GB544678A GB1540840A GB1540840A GB544678A GB 544678 A GB544678 A GB 544678A GB 1540840 A GB1540840 A GB 1540840A GB 1540840 A GB1540840 A GB 1540840A GB 544678 A GB544678 A GB 544678A
Authority
GB
United Kingdom
Prior art keywords
atmosphere
hydrogen
during
silicon steel
steel sheets
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
GB1540840A
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 International Corp
Original Assignee
Armco International 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 Armco International Corp filed Critical Armco International Corp
Priority to GB1540840A priority Critical patent/GB544678A/en
Publication of GB544678A publication Critical patent/GB544678A/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
    • C21D1/74—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
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C21D1/76—Adjusting the composition of the atmosphere

Landscapes

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

Abstract

544,678. Heat treating sillicon steel sheets. WILLIAMS, W. P. (Armco International Corporation). Oct. 17, 1940, No. 15408. [Class 72] [Also in Group XII] For the purpose of decreasing the brittleness of silicon steel sheets, they are annealed in an atmosphere which at least as early as the soaking period is kept low in hydrogen and any source of hydrogen such as water. The atmosphere may be mainly nitrogen and any hydrogen produced is oxidized by the addition of air and the product removed preferably during the circulation of the atmosphere, during which hydrogen is also removed. During the middle or latter portion of the heating up period the atmosphere is maintained in a nearly neutral condition with respect to iron and iron oxide by adding oxygen so as to maintain a substantially non-reactive balance of CO and CO 2 . The annealing may be carried out at a temperature above 1350‹ C. and terminated with a slow cooling within the temperature range 1650-1350‹F. Specification 429,940 is referred to.
GB1540840A 1940-10-17 1940-10-17 Process of making electrical sheets of silicon steel Expired GB544678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1540840A GB544678A (en) 1940-10-17 1940-10-17 Process of making electrical sheets of silicon steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1540840A GB544678A (en) 1940-10-17 1940-10-17 Process of making electrical sheets of silicon steel

Publications (1)

Publication Number Publication Date
GB544678A true GB544678A (en) 1942-04-23

Family

ID=10058615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1540840A Expired GB544678A (en) 1940-10-17 1940-10-17 Process of making electrical sheets of silicon steel

Country Status (1)

Country Link
GB (1) GB544678A (en)

Similar Documents

Publication Publication Date Title
GB1452699A (en) High permeability cube-on-edge oriented silicon steel and method of making it
GB656679A (en) An improved furnace for annealing glass
GB933873A (en) Method of producing grain oriented electrical steel
US3105780A (en) Method of decarburizing ferrous materials
GB1001281A (en) A deep drawing, non-ageing cold rolled steel sheet
GB544678A (en) Process of making electrical sheets of silicon steel
GB845167A (en) Improvements in magnetic material
GB1013778A (en) Alloy steel
GB1197800A (en) Production of Cube-On-Edge Oriented Silicon-Iron.
GB547107A (en) Improvements in production of malleable iron
GB1142552A (en) Grain-oriented iron and steel and method of making same
GB768207A (en) Improvements in or relating to the production of cast iron
GB1062744A (en) Production of cube-on-edge oriented silicon-iron
GB571245A (en) Improvements in or relating to the manufacture of whiteheart malleable iron
JPS5280215A (en) Preparation of annealed carbon steel wire
GB825903A (en) Improvements in or relating to methods of treating silicon-iron alloys
GB713034A (en) Improvements in and relating to processes of increasing the permeability of orientedsilicon steels
GB897159A (en) Improvements in and relating to the production of high-grade malleable iron castings
GB1030350A (en) Method for making bidirectional iron-aluminium alloy magnetic sheet
GB518089A (en) Improvements in and relating to the production of malleable iron
GB371205A (en) Improvements in and relating to magnetic alloys and method of making the same
GB868274A (en) Improvements in and relating to spinnerets
GB339521A (en) Improved heat treatment of manganese steel
GB127981A (en) Improvements in or relating to the Manufacture of Iron Silicon Alloys.
GB697595A (en) Improvements in and relating to cobalt-platinum magnets