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:
Sep. 27, 1977
Filed:
Nov. 14, 1975
Kazuhide Nakaoka, Yokohama, JA;
Kenji Araki, Yokohama, JA;
Koji Iwase, Machida, JA;
Yasuo Koike, Yokohama, JA;
Shiro Fukunaka, Fukuyama, JA;
Nippon Kokan Kabushiki Kaisha, Tokyo, JA;
Abstract
When a cold reduced steel of which chemical composition is substantially controlled within the range of 10x[S]% to 2.00% [Mn], 0.003 to 0.02% [N] and (<5.times.10.sup.31 4)/[N]% [Al] is subjected to a full continuous annealing process comprising a heating-up step of Ac.sub.1 to 900.degree. C .times. 5 to 180 sec., a rapid cooling step of the heating-up temperature to about room temperature by water-spray, reheating step of the room temperature to 150.degree. C to 450.degree. C .times. 5 to 300 sec., and then final cooling- and coiling step, high bake-hardenability and excellent non-aging property are given to the above steel with ease.