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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.:

US 11331742 B1

PDFFull Text
Date of Patent:
May. 17, 2022

Filed:

Mar. 08, 2016

Flux-cored wire, manufacturing method of welded joint, and welded joint

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Kotaro Watanabe, Tokyo, JP;

Tatsuya Kumagai, Tokyo, JP;

Hiroki Fujimoto, Tokyo, JP;

Yasuhito Totsuka, Chiba, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Dana Ross

Assistant Examiner:

Kuangyue Chen

Int. Cl.
CPC ...
B23K 9/16 (2006.01); C22C 38/58 (2006.01); C22C 38/54 (2006.01); C22C 38/50 (2006.01); C22C 38/48 (2006.01); C22C 38/46 (2006.01); C22C 38/44 (2006.01); C22C 38/42 (2006.01); C22C 38/06 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); B23K 35/02 (2006.01); B23K 35/30 (2006.01); B23K 35/362 (2006.01); B23K 9/235 (2006.01); B23K 9/23 (2006.01);
U.S. Cl.
CPC ...
B23K 9/164 (2013.01); B23K 9/235 (2013.01); B23K 35/0266 (2013.01); B23K 35/3073 (2013.01); B23K 35/362 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); B23K 9/23 (2013.01);
Abstract

According to an aspect of the present invention, there is provided a flux-cored wire including a steel sheath and a flux that fills the steel sheath. The flux contains fluorides of which a total value α of F-equivalent values is 0.21% or more, oxides of which the total value β of amounts ranges from 0.30% to less than 3.50%, and carbonates of which a total value of amounts ranges from 0% to 3.50%. An amount of CaO ranges from 0% to less than 0.20%. An amount of iron powder ranges from 0% to less than 10.0%. A X-value is 5.0% or less. The amount of CaFis less than 0.50%. The amount of Ti oxides ranges from 0.10% to less than 2.50%. A ratio of α to β ranges from 0.10 to 4.00. A total value of amounts of MgCO, NaCO, and LiCOranges from 0% to 3.00%. Other chemical composition is within a predetermined range. Ceq ranges from 0.45% to 1.20%.

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