Title: Method for producing coated electrical steel sheets having excellent punchability, weldability, electrical insulation and heat resistance

Abstract: Coated electrical steel sheets having excellent punchability, weldability and insulation resistance are produced by applying an electrical steel sheet with a treating dispersion obtained by compounding the particle separating resin emulsion and the compatible resin to an aqueous solution containing chromic acid in the particularly defined amount and baking the thus applied steel sheets. To the treating dispersion may be added saccharides or polyhydric alcohols as a reducing agent or boric acid or phosphoric acid.

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

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

Inventors: Irie, Toshio (Chiba, JA)
Tanda, Toshikuni (Akashi, JA)
Ichi, Tomoyuki (Ashiya, JA)
Sadayori, Toshio (Chiba, JA)

Application Number: 621740
Filing Date: 1975-10-14
Publication_date: 1977-06-28
Assignee: Kawasaki Steel Corporation (Kobe, JA)
Primary Class(es): 427/126.1 148/251, 427/104, 427/388.4
Other Classes:
US Patent Ref:

2902390	Sep, 1959	Bell	427/388.
3053691	Sep, 1962	Hartman et al.	427/388.
3053692	Sep, 1962	Pocock	427/388.
3632362	Jan, 1972	Urushiyama et al.	427/388.

Other Refs:
Primary Examiner: Hoffman, James R.
Assistant Examiner:
Attorney: