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:
Oct. 20, 2015
Filed:
Jul. 20, 2011
Ryuichi Narita, Tokyo, JP;
Takashi Hanioka, Tokyo, JP;
Tadahiro Kimura, Tokyo, JP;
Masahiro Kimura, Tokyo, JP;
Masao Shiota, Tokyo, JP;
Ryuichi Narita, Tokyo, JP;
Takashi Hanioka, Tokyo, JP;
Tadahiro Kimura, Tokyo, JP;
Masahiro Kimura, Tokyo, JP;
Masao Shiota, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
An electron beam welding method capable of restoring toughness even when high heat input welding is performed. The electron beam welding method comprises: forming a first weld bead () so as to include a groove () provided at the butt portions of two base materials (), and forming a second weld bead () and a third weld bead () having a narrower width than the first weld bead (), at predetermined positions displaced from the groove () and centered symmetrically about the butt portions so as to include a portion of the first weld bead (), using a lower heat input than that used during formation of the first weld bead ().