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:
Mar. 12, 1985
Filed:
Oct. 06, 1983
Applicant:
Inventors:
Yoshikuni Tokunaga, Tokai, JP;
Masato Yamada, Tokai, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 / ; 148 123 ; 148 36 ;
Abstract
Method for the production of a cold rolled steel sheet which has a distinguished deep drawability as well as chemical treating ability by the steps of providing a very low carbon steel, adding Ti and Nb in combination to said steel, hot rolling and cold rolling said steel to produce a cold rolled steel sheet, and subjecting said cold rolled steel sheet to a continuous anneal at a temperature of more than 700.degree. C. to less than the Ac.sub.3 transformation point.