Process for producing heat-resistant, ferritic stainless steel sheet
CA 1234533 A · Owner: Sumitomo Metal Industries, Ltd. · Inventors: Shida, Yoshiaki; Fujikawa, Hisao; Murayama, Junichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing heat-resistant ferritic stainless steel sheet which exhibits improved toughness and productivity is disclosed. The process comprises the following steps:, (a) hot rolling a steel with a finishing temperature of not higher than 850°, said steel comprising by weight %, C : not more than 0.07%, Si: 1.5 - 3.5% Mn: not more than 2.0%, Cr: 10 - 25%, N : not more than 0.05% Nb: 5X(C% + N%) - 20X(C% + N%), optionally at least one element selected from the group consisting of Al, Y, Ca, and REM in a total amount of 0.3% or less, and, the balance iron and incidental impurities; and (b) annealing the resulting hot rolled steel sheet at a temperature of 820- 1000°C. Cold rolling …
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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 March 29, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 29, 2005.
- 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
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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.