Method of producing as rolled high toughness steel
CA 1190835 A · Owner: Nippon Steel Corporation · Inventors: Tamehiro, Hiroshi; Chigiiwa, Rikio; Matsunaka, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method has been developed for making high strength and high toughness steel having superior toughness even at heat affected zones due to welding. The method consists of preparing a cast steel of strictly controlled chemical composition by an oxygen converter followed by continuous casting heating the, steel at a considerably lower temperature of 950° - 1050°C and subjecting the heated steel to controlled rolling so that the steel can be rolled at a temperature within an austenite single phase region. The controlled chemical composition of the steel is maintained to have 0.01 - 0.15% C not more than, 0.6% Si, 0.8 - 2.0% Mn, 0.01 - 0.08% Al not more than, 0.008% S, 0.008 - 0.025% Ti 0.001 - …
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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 23, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2002.
- 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.