Method for producing coated electrical steel sheets having excellent punchability, weldability, electrical insulation and heat resistance
US4032675A · kind A · utility
7Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Oct 14, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/14783
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.