JPS6462476A - Separation at annealing agent for grain-oriented magnetic steel sheet - Google Patents

Separation at annealing agent for grain-oriented magnetic steel sheet

Info

Publication number
JPS6462476A
JPS6462476A JP21522587A JP21522587A JPS6462476A JP S6462476 A JPS6462476 A JP S6462476A JP 21522587 A JP21522587 A JP 21522587A JP 21522587 A JP21522587 A JP 21522587A JP S6462476 A JPS6462476 A JP S6462476A
Authority
JP
Japan
Prior art keywords
annealing
steel sheet
grain
separation agent
magnetic steel
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
JP21522587A
Other languages
Japanese (ja)
Other versions
JPH0371511B2 (en
Inventor
Hisanobu Nakayama
Osamu Tanaka
Hiromichi Yasumoto
Yoichi Zaizen
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 JP21522587A priority Critical patent/JPS6462476A/en
Priority to DE8888114129T priority patent/DE3875676T2/en
Priority to EP88114129A priority patent/EP0305966B1/en
Priority to US07/239,191 priority patent/US4875947A/en
Publication of JPS6462476A publication Critical patent/JPS6462476A/en
Publication of JPH0371511B2 publication Critical patent/JPH0371511B2/ja
Granted legal-status Critical Current

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  • Chemical Treatment Of Metals (AREA)

Abstract

PURPOSE:To prevent the formation of a glass film in the course of the finish annealing of a steel sheet to which the undermentioned separation agent at annealing is applied and to improve punchability, by providing a separation agent at annealing in which prescribed percentages of chlorides of alkali metals or alkaline-earth metals are incorporated to magnesia. CONSTITUTION:This separation agent at annealing is composed of a compounding material consisting of 100pts.wt. of magnesia and 2-40pts.wt. of one or more kinds among the chlorides of alkali metals or alkaline-earth metals. A grain-oriented magnetic steel sheet to which the above separation agent at annealing is applied is subjected to finish annealing. In the course of the above procedure, SiO2 in an oxide film on the steel-sheet surface is etched by the chlorides in the separation agent. Accordingly, the formation of a glass film formed by the reaction of SiO2 with magnesia is prevented. By this method, a grain-oriented magnetic steel sheet excellent in punchability can be obtained.
JP21522587A 1987-08-31 1987-08-31 Separation at annealing agent for grain-oriented magnetic steel sheet Granted JPS6462476A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP21522587A JPS6462476A (en) 1987-08-31 1987-08-31 Separation at annealing agent for grain-oriented magnetic steel sheet
DE8888114129T DE3875676T2 (en) 1987-08-31 1988-08-30 METHOD FOR PRODUCING CORNORIENTED STEEL SHEETS WITH METAL GLOSS AND EXCELLENT PUNCHABILITY.
EP88114129A EP0305966B1 (en) 1987-08-31 1988-08-30 Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property
US07/239,191 US4875947A (en) 1987-08-31 1988-08-31 Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21522587A JPS6462476A (en) 1987-08-31 1987-08-31 Separation at annealing agent for grain-oriented magnetic steel sheet

Publications (2)

Publication Number Publication Date
JPS6462476A true JPS6462476A (en) 1989-03-08
JPH0371511B2 JPH0371511B2 (en) 1991-11-13

Family

ID=16668779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21522587A Granted JPS6462476A (en) 1987-08-31 1987-08-31 Separation at annealing agent for grain-oriented magnetic steel sheet

Country Status (1)

Country Link
JP (1) JPS6462476A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06145804A (en) * 1992-11-12 1994-05-27 Nippon Steel Corp Manufacture of high magnetic flux density grain-oriented electrical steel sheet good in workability
JP2020111815A (en) * 2019-01-16 2020-07-27 日本製鉄株式会社 Grain oriented electromagnetic steel sheet and method for manufacturing the same
KR20220169947A (en) 2021-06-18 2022-12-28 교와 가가꾸고교 가부시키가이샤 Manufacturing method of annealing separator, annealing separator and grain-oriented magnetic steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06145804A (en) * 1992-11-12 1994-05-27 Nippon Steel Corp Manufacture of high magnetic flux density grain-oriented electrical steel sheet good in workability
JP2020111815A (en) * 2019-01-16 2020-07-27 日本製鉄株式会社 Grain oriented electromagnetic steel sheet and method for manufacturing the same
KR20220169947A (en) 2021-06-18 2022-12-28 교와 가가꾸고교 가부시키가이샤 Manufacturing method of annealing separator, annealing separator and grain-oriented magnetic steel

Also Published As

Publication number Publication date
JPH0371511B2 (en) 1991-11-13

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