The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Jan. 26, 2021
Proterial, Ltd., Tokyo, JP;
Hiroyoshi Fujihara, Tokyo, JP;
Proterial, Ltd., Tokyo, JP;
Abstract
A method for producing a martensitic stainless steel strip, said method comprising: a quenching step wherein a steel strip, which contains, in mass %, from 0.3% to 1.2% of C and from 10.0% to 18.0% of Cr and has a thickness of 1 mm or less, is passed through a quenching furnace so as to be heated to a quenching temperature, and is subsequently cooled to a temperature that is not more than the Ms point; a heat retention conveyance step wherein the steel strip is conveyed to a an annealing furnace, while retaining the temperature of the steel strip so as not to decrease to a temperature less than 80° C.; and an annealing step wherein the steel strip is passed through the annealing furnace in a non-oxidizing gas atmosphere so as to be heated to an annealing temperature.