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. 17, 2015
Filed:
Sep. 04, 2009
Atsushi Ishigami, Chiba, JP;
Kenji Oi, Chiyodu-ku, JP;
Naoya Hayakawa, Chiba, JP;
JFE Steel Corporation, Tokyo, JP;
Abstract
Provided is a submerged arc welding method for a steel plate. In welding the steel plate from an internal surface or an external surface by a submerged arc welding, welding condition is set such that, a cross-sectional area of internal weld metal Sand a cross-sectional area of external weld metal Ssatisfy the formula (1), the formula (2), and the formula (3), that is, 0.40≦(S+S)/t≦0.80 . . . (1), S/t≦0.35 . . . (2), and S/t≦0.45 . . . (3), wherein t is a plate thickness of the steel plate (mm), Sis a cross-sectional area of the internal weld metal (mm) excluding the cross-sectional area of a portion of the internal weld metal overlapping with the external weld metal after external welding, and Sis a cross-sectional area of the external weld metal (mm).