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:
Feb. 14, 2012
Filed:
Jan. 12, 2007
Tadashi Ishikawa, Futtsu, JP;
Ryuichi Honma, Futtsu, JP;
Akihiko Kojima, Futtsu, JP;
Yuzuru Yoshida, Tokyo, JP;
Youichi Tanaka, Futtsu, JP;
Tadashi Ishikawa, Futtsu, JP;
Ryuichi Honma, Futtsu, JP;
Akihiko Kojima, Futtsu, JP;
Yuzuru Yoshida, Tokyo, JP;
Youichi Tanaka, Futtsu, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
To form a welded joint having a sufficiently high fracture toughness value δc by butting welding high strength steel plates having a yield strength of the 355 MPa class or more and a plate thickness of over 50 mm by electron beam welding, the butt welded joint is made one where the hardness of the weld metal is 110% to 220% of the hardness of the base material and where the width of the weld metal is 20% A or less of the base material plate thickness.