GB848512A - Improvements in or relating to a process for producing silicon steel - Google Patents

Improvements in or relating to a process for producing silicon steel

Info

Publication number
GB848512A
GB848512A GB2024758A GB2024758A GB848512A GB 848512 A GB848512 A GB 848512A GB 2024758 A GB2024758 A GB 2024758A GB 2024758 A GB2024758 A GB 2024758A GB 848512 A GB848512 A GB 848512A
Authority
GB
United Kingdom
Prior art keywords
anneal
silicon steel
steel
cold rolling
rolled strip
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
GB2024758A
Inventor
John Harris Crede
Robert Henry Henke
Edward Leo Pulaski
Carl Philip Stroble
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.)
Allegheny Ludlum Steel Corp
Original Assignee
Allegheny Ludlum Steel 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 Allegheny Ludlum Steel Corp filed Critical Allegheny Ludlum Steel Corp
Priority to GB2024758A priority Critical patent/GB848512A/en
Publication of GB848512A publication Critical patent/GB848512A/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
    • 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
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1222—Hot rolling
    • 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
    • C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab

Landscapes

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

Abstract

A process for producing highly grain oriented silicon steel for magnetic purposes comprises heating a silicon steel ingot containing 2.5% to 4% silicon to a temperature above 2300 DEG F., e.g. between 2300 DEG F. and 2475 DEG F. hot working the heated ingot into hot rolled strip of 0.060 to 0.10 inch in thickness before the temperature drops below 1600 DEG F., the hot working from heated ingot to hot rolled strip being a direct hot working without an intermediate reheating of the steel, and thereafter subjecting said hot rolled strip to one or more cold rolling treatments and a final high temperature box anneal. The steel strip may be subjected to an intermediate anneal subsequent to the cold rolling consisting of an open anneal between 1600 DEG F. and 1850 DEG F. A second cold rolling step may be followed by a decarburizing anneal between 1400 DEG F. and 1550 DEG F. including the open anneal. The final box anneal takes place in dry hydrogen between 2100 DEG F. and 2200 DEG F. A silicon steel so treated has a composition within the following percentage ranges by weight:-Si 2.9-3.4; C 0.02-0.035; Mn 0.035-0.1; P 0.05-0.02; S 0.05-0.025; Ni 0.03-0.15; Al 0.05 max.; Cu 0.05-0.3; Sn 0.005-0.02; Fe balance. An alloy disclosed having the above composition also includes Co 0.011%. Specification 442,211 and U.S.A. Specification 2,599,340 are referred to.
GB2024758A 1958-06-24 1958-06-24 Improvements in or relating to a process for producing silicon steel Expired GB848512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2024758A GB848512A (en) 1958-06-24 1958-06-24 Improvements in or relating to a process for producing silicon steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2024758A GB848512A (en) 1958-06-24 1958-06-24 Improvements in or relating to a process for producing silicon steel

Publications (1)

Publication Number Publication Date
GB848512A true GB848512A (en) 1960-09-21

Family

ID=10142823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2024758A Expired GB848512A (en) 1958-06-24 1958-06-24 Improvements in or relating to a process for producing silicon steel

Country Status (1)

Country Link
GB (1) GB848512A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339475A2 (en) * 1988-04-23 1989-11-02 Nippon Steel Corporation High-flux density, grain-oriented electrical steel sheet having highly improved watt loss characteristic and process for preparation thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339475A2 (en) * 1988-04-23 1989-11-02 Nippon Steel Corporation High-flux density, grain-oriented electrical steel sheet having highly improved watt loss characteristic and process for preparation thereof
EP0339475A3 (en) * 1988-04-23 1990-09-26 Nippon Steel Corporation High-flux density, grain-oriented electrical steel sheet having highly improved watt loss characteristic and process for preparation thereof
US5141573A (en) * 1988-04-23 1992-08-25 Nippon Steel Corporation High flux density grain-oriented electrical steel sheet having improved watt loss characteristic and process for preparation thereof

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