Title: Method for producing a super low watt loss grain oriented electrical steel sheet

Abstract: A method for producing a grain-oriented electrical steel sheet showing super low watt loss, comprising making a silicon steel ingot containing 2.5 to 4.0% of Si, subjecting the ingot treatments including hot rolling, annealing and at least one cold rolling to obtain a final size, subjecting the steel to decarburization annealing and a finishing annealing which completes secondary recrystallization, subjecting the steel to remove surface product and then subjecting the steel to chemical polishing or electrolytic polishing to polish the steel surface to mirror condition.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Wada, Toshiya (Kitakyushu, JA)
Nozawa, Tadao (Munakata, JA)
Takata, Toshihiko (Kitakyushu, JA)

Application Number: 434449
Filing Date: 1974-01-18
Publication_date: 1976-01-13
Assignee: Nippon Steel Corporation (JA)
Primary Class(es): 148/113 148/308
Other Classes:
US Patent Ref:

2385332	Sep, 1945	Carpenter et al.	148/113.
2394047	Feb, 1946	Elsey et al.	148/113.
2528216	Oct, 1950	Dunn et al.	148/113.
3223602	Dec, 1965	Wawrousek	148/111.
3347718	Oct, 1967	Carpenter et al.	148/111.
3575739	Apr, 1971	Fiedler	148/111.
3764406	Oct, 1973	Littmann	148/111.
3833431	Sep, 1974	Foster et al.	148/113.
3834952	Sep, 1974	Matsushita et al.	148/112.

Other Refs:
Primary Examiner: Satterfield, Walter R.
Assistant Examiner:
Attorney: Toren, McGeady and Stanger