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:
Apr. 23, 2002
Filed:
Dec. 08, 2000
Applicant:
Inventors:
Kei-ichi Maruta, Chiba, JP;
Michio Shimotomai, Chiba, JP;
Yasunori Yonehana, Chiba, JP;
Yoshio Abe, Futtsu, JP;
Tomoyuki Yokota, Kawasaki, JP;
Yoshitaka Adachi, Osaka, JP;
Norikazu Matsukura, Kobe, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 1/04 ;
U.S. Cl.
CPC ...
C21D 1/04 ;
Abstract
A structure of a two-phase steel is controlled by subjecting a steel containing C: 0.05-0.80 mass % to a strain work in a true strain quantity of not less than 0.1 at a temperature zone of &agr;-phase or &ggr;-phase and then applying a magnetic field of 0.1-20 T thereto within a temperature range forming a two-phase zone of &agr;-phase and &ggr;-phase.