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:
May. 24, 1988
Filed:
Mar. 06, 1986
Applicant:
Inventors:
Atsuhiro Wakako, Tokyo, JP;
Takeshi Ono, Tokai, JP;
Kunio Kawamura, Tokai, JP;
Kenichi Matsui, Tokai, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72 13 ; 72 38 ; 72 39 ; 148145 ;
Abstract
A hot rolling method, wherein portions of a hot-rolled steel material having suffered a temperature fall below Ar.sub.3 transformation temperature thereof during hot rolling are subjected to an intermediate heating to have a temperature not less than Ac.sub.3 transformation temperature before the steel material is finally finish-hot-rolled, whereby a resultant hot-rolled product can have a superior uniform structure without duplex structure, and apparatus for effecting the method.