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:
Jan. 07, 2014
Filed:
Oct. 27, 2011
Ryuichi Honma, Tokyo, JP;
Ryuji Uemori, Tokyo, JP;
Tadashi Ishikawa, Tokyo, JP;
Akihiko Kojima, Tokyo, JP;
Manabu Hoshino, Tokyo, JP;
Ryuichi Honma, Tokyo, JP;
Ryuji Uemori, Tokyo, JP;
Tadashi Ishikawa, Tokyo, JP;
Akihiko Kojima, Tokyo, JP;
Manabu Hoshino, Tokyo, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
An electron-beam welded joint including, by mass %, C: 0.02% to 0.1%, Si: 0.03% to 0.30%, Mn: 1.5% to 2.5%, Ti: 0.005 to 0.015%, N: 0.0020 to 0.0060%, O: 0.0010% to 0.0035%, Nb: 0% to 0.020%, V: 0% to 0.030%, Cr: 0% to 0.50%, Mo: 0% to 0.50%, Cu: 0% to 0.25%, Ni: 0% to 0.50%, B: 0% to 0.0030%, S: limited to 0.010% or less, P: limited to 0.015% or less, Al: limited to 0.004% or less, and a balance consisting of iron and unavoidable impurities, wherein an index value CeEB is 0.49% to 0.60%, a number of oxides having an equivalent circle diameter of 1.0 μm or more is 20 pieces/mmor less, and a number of oxides having an equivalent circle diameter of 0.05 μm or more and less than 0.5 μm is 1×10pieces/mmto 1×10pieces/mmat a thickness center portion.