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:
Jun. 04, 1996
Filed:
Mar. 03, 1995
Tadashi Inoue, Kawasaki, JP;
Kiyoshi Tsuru, Kawasaki, JP;
Tomoyoshi Okita, Kawasaki, JP;
Michihito Hiasa, Kawasaki, JP;
NKK Corporation, Tokyo, JP;
Abstract
A method for manufacturing an alloy sheet comprising the steps of: (a) hot-rolling a slab containing Fe, Ni and Cr into a hot-rolled strip; (b) annealing the hot-rolled strip at a temperature of 810.degree. to 890.degree. C.; (c) cold-rolling the annealed hot-rolled strip at a reduction ratio of 81 to 94% into a cold-rolled sheet; (d) recrystallization annealing of the cold-rolled sheet; (e) finish cold-rolling the cold-rolled sheet subjected to the recrystallization annealing at a reduction ratio of 14 to 29%; (f) stress relief annealing of the cold-rolled sheet subjected to the finish cold-rolling; and (g) annealing, before press-forming. The cold-rolled sheet subjected to the stress relief annealing at a temperature of 740.degree. to 900.degree. C. for 2 to 40 minutes and satisfying the following equation: T.ltoreq.-123 logt+937, where T is a temperature (.degree.C.) and t is a time (minutes) for the annealing.