JPS5550432A - Heat treating method for electrical steel sheet - Google Patents

Heat treating method for electrical steel sheet

Info

Publication number
JPS5550432A
JPS5550432A JP12399778A JP12399778A JPS5550432A JP S5550432 A JPS5550432 A JP S5550432A JP 12399778 A JP12399778 A JP 12399778A JP 12399778 A JP12399778 A JP 12399778A JP S5550432 A JPS5550432 A JP S5550432A
Authority
JP
Japan
Prior art keywords
sheet
electrical steel
steel sheet
held
iron loss
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.)
Pending
Application number
JP12399778A
Other languages
Japanese (ja)
Inventor
Masaaki Sano
Seiki Shimizu
Masanori Yoshizaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12399778A priority Critical patent/JPS5550432A/en
Publication of JPS5550432A publication Critical patent/JPS5550432A/en
Pending 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet 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)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE:To prevent iron loss of an electrical steel sheet from increasing owing to a temp. rise after heat treatment by carrying out the treatment in two processes of high and low temps. CONSTITUTION:An electrical steel sheet is heated and held at 650-850 deg.C in a weakly oxidizing atmosphere or a nitrogen-hydrogen mixed gas atmosphere to make the grains coarse as well as to relieve the punching strain of the sheet, thus forming the foundation for enhancing the magnetic characteristics of the sheet. The sheet is then cooled and held at 300-500 deg.C in the same atmosphere to precipitate unstable free carbon at the grain boundaries, followed by cooling to room temp. By this method iron loss of the sheet due to aging can be reduced without deteriorating the magnetic characteristics.
JP12399778A 1978-10-07 1978-10-07 Heat treating method for electrical steel sheet Pending JPS5550432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12399778A JPS5550432A (en) 1978-10-07 1978-10-07 Heat treating method for electrical steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12399778A JPS5550432A (en) 1978-10-07 1978-10-07 Heat treating method for electrical steel sheet

Publications (1)

Publication Number Publication Date
JPS5550432A true JPS5550432A (en) 1980-04-12

Family

ID=14874473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12399778A Pending JPS5550432A (en) 1978-10-07 1978-10-07 Heat treating method for electrical steel sheet

Country Status (1)

Country Link
JP (1) JPS5550432A (en)

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