Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics
CA 1320108 C · Owner: Yakashiro, Kenichi · Inventors: Kobayashi, Hisashi; Yakashiro, Kenichi; Kuroki, Katsuro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an improvement in the technique of heating an electrical steel slab at a low temperature. A grain-oriented electrical steel sheet having excellent magnetic characteristics and film characteristics is prepared by the process characterized in that a slab comprising, as main ingredients up to, 0.012% by weight of S, 0.010 to 0.060% by weight of acid-soluble Al, up to 0.010% by weight of N 0.08 to, 0.45% by weight of Mn, and 0.015 to 0.045% by weight is used as the starting slab, and after the decarburization annealing, the nitriding treatment is carried out at a temperature of 500 to 900°C in an atmosphere having an NH3 gas concentration of at least 1000 ppm …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.