JPS5466320A - High speed decarburization annealing method for electrical sheet - Google Patents

High speed decarburization annealing method for electrical sheet

Info

Publication number
JPS5466320A
JPS5466320A JP13266877A JP13266877A JPS5466320A JP S5466320 A JPS5466320 A JP S5466320A JP 13266877 A JP13266877 A JP 13266877A JP 13266877 A JP13266877 A JP 13266877A JP S5466320 A JPS5466320 A JP S5466320A
Authority
JP
Japan
Prior art keywords
sheet
decarburization annealing
electrical sheet
soln
alkali metal
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.)
Granted
Application number
JP13266877A
Other languages
Japanese (ja)
Other versions
JPS5833301B2 (en
Inventor
Hiromichi Koshiishi
Kunisuke Miyoshi
Sadami Kosaka
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.)
Nippon Steel Corp
Original Assignee
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP13266877A priority Critical patent/JPS5833301B2/en
Publication of JPS5466320A publication Critical patent/JPS5466320A/en
Publication of JPS5833301B2 publication Critical patent/JPS5833301B2/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
    • C21D3/04—Decarburising

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 deterioration in magnetism of an electrical sheet due to aging and that in high magnetic field iron loss by coating the sheet with a soln. of an alkali metal salt and subjecting the coated sheet to decarburization annealing in a weakly oxidizing atmosphere not to oxidize Al and Si contained in the sheet. CONSTITUTION:In manufacture of an electrical sheet, the carbon content of raw material is reduced as much as possible by vacuum degassing or the like. The rolled sheet is coated with a soln. of an alkali metal salt such as K2CO3, KCl, Na2CO3 or NaCl in an amt. of 0.3-2.0 g/m<2> and then subjected to decarburization annealing at 900- 1050 deg.C in a weakly oxidizing atmosphere having the ratio of the partial press. of steam and that of hydrogen below 0.15. Thus, the C content of the steel is reduced, improving the magnetic aging property. Al and Si contained in the sheet are hardly oxidized in the atmosphere, and hence deterioration in high magnetic field iron loss due to the oxide layer can be prevented, resulting in a high grade electrical sheet.
JP13266877A 1977-11-05 1977-11-05 High-speed decarburization annealing method for electrical steel sheets Expired JPS5833301B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13266877A JPS5833301B2 (en) 1977-11-05 1977-11-05 High-speed decarburization annealing method for electrical steel sheets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13266877A JPS5833301B2 (en) 1977-11-05 1977-11-05 High-speed decarburization annealing method for electrical steel sheets

Publications (2)

Publication Number Publication Date
JPS5466320A true JPS5466320A (en) 1979-05-28
JPS5833301B2 JPS5833301B2 (en) 1983-07-19

Family

ID=15086695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13266877A Expired JPS5833301B2 (en) 1977-11-05 1977-11-05 High-speed decarburization annealing method for electrical steel sheets

Country Status (1)

Country Link
JP (1) JPS5833301B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190021A (en) * 1985-02-18 1986-08-23 Nippon Steel Corp Manufacture of grain-oriented electrical steel sheet having satisfactory magnetism
US5509976A (en) * 1995-07-17 1996-04-23 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet having a mirror surface and improved core loss

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190021A (en) * 1985-02-18 1986-08-23 Nippon Steel Corp Manufacture of grain-oriented electrical steel sheet having satisfactory magnetism
US5509976A (en) * 1995-07-17 1996-04-23 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet having a mirror surface and improved core loss

Also Published As

Publication number Publication date
JPS5833301B2 (en) 1983-07-19

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