JPS55138021A - Manufacture of annealing separation agent for electromagnetic steel plate - Google Patents

Manufacture of annealing separation agent for electromagnetic steel plate

Info

Publication number
JPS55138021A
JPS55138021A JP4296179A JP4296179A JPS55138021A JP S55138021 A JPS55138021 A JP S55138021A JP 4296179 A JP4296179 A JP 4296179A JP 4296179 A JP4296179 A JP 4296179A JP S55138021 A JPS55138021 A JP S55138021A
Authority
JP
Japan
Prior art keywords
mgo
pulverized
steel plate
electromagnetic steel
agent
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
JP4296179A
Other languages
Japanese (ja)
Inventor
Yoshitaka Hiromae
Kazuo Nakamura
Hajime Hinoto
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 JP4296179A priority Critical patent/JPS55138021A/en
Priority to IT27566/79A priority patent/IT1127263B/en
Priority to US06/098,118 priority patent/US4287006A/en
Priority to GB7940971A priority patent/GB2041343B/en
Priority to DE2947945A priority patent/DE2947945C2/en
Priority to FR7929711A priority patent/FR2442892B1/en
Publication of JPS55138021A publication Critical patent/JPS55138021A/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/72—Temporary coatings or embedding materials applied before or during heat treatment during chemical change of surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE:To produce an annealing separation agent which does not deteriorate the magnetic properties of an electromagnetic steel plate, by using a pulverizer comprising a pulverizing bowl made of porcelain and a rod to pulverize nonhydrated MgO into a prescribed grain diameter in a wet manner and then blending the pulverized MgO with limited quantities of Mg(OH)2 and an Al compound. CONSTITUTION:Unhydrated MgO is pulverized in a wet manner by a pulverizer, which comprises a pulverizing bowl made of porcelain and a rod, so that 70% or more of the grains of the pulverized MgO is 5mu or less in diameter. The pulverized substance is blended with 50% or less of Mg(OH)2 and 5% or less of an Al compound such as Al(OH)3 or Al(NO3)3. An annealing separation agent is thus produced. With this agent, the magnetic properties of an electromagnetic steel plate are not deteriorated in finish annealing. According to this method, iron which would deteriorate the magnetic properties does not mix into the agent as in the case that an iron-made bowl or rod is used, and the MgO can be pulverized in a short time as well as in dry pulverization.
JP4296179A 1978-11-28 1979-04-11 Manufacture of annealing separation agent for electromagnetic steel plate Pending JPS55138021A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP4296179A JPS55138021A (en) 1979-04-11 1979-04-11 Manufacture of annealing separation agent for electromagnetic steel plate
IT27566/79A IT1127263B (en) 1978-11-28 1979-11-26 SEPARATION SUBSTANCE TO BE USED IN THE ANNEALING PHASE OF ORIENTED GRAINS OF SILICON STEEL
US06/098,118 US4287006A (en) 1978-11-28 1979-11-27 Annealing separator for grain oriented silicon steel strips
GB7940971A GB2041343B (en) 1978-11-28 1979-11-27 Mg o-basd annealing separator for grain oriented silicon steel strips
DE2947945A DE2947945C2 (en) 1978-11-28 1979-11-28 Annealing separator for grain-oriented silicon steel strip
FR7929711A FR2442892B1 (en) 1978-11-28 1979-11-28 ANNEALING SEPARATOR FOR ORIENTED GRAIN SILICON STEEL BLADES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4296179A JPS55138021A (en) 1979-04-11 1979-04-11 Manufacture of annealing separation agent for electromagnetic steel plate

Publications (1)

Publication Number Publication Date
JPS55138021A true JPS55138021A (en) 1980-10-28

Family

ID=12650620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4296179A Pending JPS55138021A (en) 1978-11-28 1979-04-11 Manufacture of annealing separation agent for electromagnetic steel plate

Country Status (1)

Country Link
JP (1) JPS55138021A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995025820A1 (en) * 1994-03-22 1995-09-28 EBG Gesellschaft für elektromagnetische Werkstoffe mbH Process for producing magnetic steel sheets with a glass coating
JP2012177148A (en) * 2011-02-25 2012-09-13 Jfe Steel Corp Annealing separating agent
JP2016060953A (en) * 2014-09-19 2016-04-25 Ｊｆｅスチール株式会社 Manufacturing method of oriented magnetic steel sheet
EP3561084A4 (en) * 2016-12-21 2019-10-30 Posco Annealing separator composition for oriented electrical steel sheet, oriented electrical steel sheet, and method for manufacturing oriented electrical steel sheet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919981A (en) * 1972-06-15 1974-02-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919981A (en) * 1972-06-15 1974-02-21

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995025820A1 (en) * 1994-03-22 1995-09-28 EBG Gesellschaft für elektromagnetische Werkstoffe mbH Process for producing magnetic steel sheets with a glass coating
US5863356A (en) * 1994-03-22 1999-01-26 Ebg Gesellschaft Fur Elektromagnetische Werkstoffe Mbh Method for producing electric sheets with a glass coating
KR100367985B1 (en) * 1994-03-22 2003-08-02 에베게 게젤샤프트 퓌어 엘렉트로마그네티체 베르크스토페 엠베하 Manufacturing method of electronic steel sheet coated with glass
JP2012177148A (en) * 2011-02-25 2012-09-13 Jfe Steel Corp Annealing separating agent
JP2016060953A (en) * 2014-09-19 2016-04-25 Ｊｆｅスチール株式会社 Manufacturing method of oriented magnetic steel sheet
EP3561084A4 (en) * 2016-12-21 2019-10-30 Posco Annealing separator composition for oriented electrical steel sheet, oriented electrical steel sheet, and method for manufacturing oriented electrical steel sheet
US11174525B2 (en) 2016-12-21 2021-11-16 Posco Annealing separator composition for oriented electrical steel sheet, oriented electrical steel sheet, and method for manufacturing oriented electrical steel sheet

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