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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 10786873 B1

PDFFull Text
Date of Patent:
Sep. 29, 2020

Filed:

Jul. 28, 2016

Fillet arc welded joint and method for producing same

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Shinji Kodama, Tokyo, JP;

Yujiro Tatsumi, Tokyo, JP;

Shoko Oami, Tokyo, JP;

Yasuaki Naito, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Donnell A Long

Int. Cl.
CPC ...
B23K 26/354 (2014.01); C22C 38/50 (2006.01); B23K 9/02 (2006.01); B23K 35/30 (2006.01); B23K 9/025 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/58 (2006.01); B23K 101/00 (2006.01);
U.S. Cl.
CPC ...
B23K 26/354 (2015.10); B23K 9/02 (2013.01); B23K 9/025 (2013.01); B23K 35/30 (2013.01); B23K 35/3053 (2013.01); B23K 35/3086 (2013.01); C22C 38/002 (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 38/58 (2013.01); B23K 2101/006 (2018.08); C22C 38/00 (2013.01);
Abstract

A fillet arc welded joint formed by fillet arc welding at least two metal members, comprising a remelted and solidified portion obtained by irradiating a laser at a weld toe portion of the fillet arc welding of at least one metal member and a region including a boundary of the heat affected zone caused by the fillet arc welding at the surface of that metal member, the remelted and solidified portion being a range from a surface of the metal member to a depth of ½ or less of the thickness of that metal member, an average effective crystal grain diameter of prior austenite at a heat affected zone from a boundary of the remelted and solidified portion at the surface of the metal member to a depth of 0.1 mm in the thickness direction of the metal member being 20 μm or less.

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