Method for producing high strength steel excellent in properties after warm working
CA 1253055 A · Owner: Nippon Kokan Kabushiki Kaisha · Inventors: Yamasaki, Yoshitaka; Matsumoto, Kazuaki; Tagawa, Hisatoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A steel which is excellent in mechanical properties after a warm working process is produced by specifying a chemical composition as claimed, subjecting the steel to a controlled rolling under conditions at temperatures of not more than 900°C and accumulated reduction of more than 30% leaving it, after, the controlled rolling as it is in the air or performing it to an accelerated cooling wherein the steel is cooled at rate between the air cooling and 100°C/sec until temperatures where a transformation finishes, subsequently reheating the steel to ranges between 400°C and 750°C, and carrying out the warm working thereon instantaneously or after the air cooling at the temperatures between …
Read the whole patent
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 April 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 25, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.