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:
Dec. 15, 2015
Filed:
Dec. 14, 2010
Kazuhiro Kojima, Tokyo, JP;
Ryuichi Shimura, Tokyo, JP;
Kiyohito Sasaki, Tokyo, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
A flux-cored wire for gas shielded welding use which can reduce the oxygen of weld metal to obtain a weld joint which is excellent in toughness and which enables all-position welding by direct current reverse polarity, wherein the wire contains, by mass % with respect to the wire total mass, CaO: 0.2 to 7.0%, one or more of MgF, CaF, SrF, and BaFin a total of 1.0% or more (total of fluorides and CaO being 3.0 to 12.0%), one or more of Si, Al (less than 0.3%), Ti, Mg, Zr, Ca, Ce, and La in a total of 0.2 to 2.0%, and one or more oxides of Si, Mn, Al, Ti, B, and Zr in a total of 0.2 to 3.0%, α=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+Nb/10+5B is 0.15 to 0.40%, P and S in a total of 0.040% or less, a balance of Fe, an arc stabilizer, unavoidable impurities, and a content of iron powder in the flux of 5.0% or less.