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:
Jul. 28, 2020
Filed:
Sep. 17, 2015
Applicant:
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Inventors:
Yasuaki Naito, Tokyo, JP;
Yasunobu Miyazaki, Tokyo, JP;
Assignee:
NIPPON STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 26/00 (2014.01); B23K 26/02 (2014.01); B23K 26/067 (2006.01); B23K 26/244 (2014.01); B23K 26/035 (2014.01); H01L 21/67 (2006.01); H01S 3/00 (2006.01); H01S 3/131 (2006.01); B23K 101/18 (2006.01); B23K 103/04 (2006.01);
U.S. Cl.
CPC ...
B23K 26/067 (2013.01); B23K 26/035 (2015.10); B23K 26/0676 (2013.01); B23K 26/244 (2015.10); H01L 21/67144 (2013.01); H01S 3/0014 (2013.01); H01S 3/131 (2013.01); B23K 2101/18 (2018.08); B23K 2103/04 (2018.08);
Abstract
A laser welded joint excellent in joint strength preventing a bead from cracking and comprised of exactly the number of weld beads required for joint strength in overlay laser welding of steel sheets forming multiple ring-shaped weld beads, produced by a step of overlaying a plurality of metal sheets and forming a first weld bead and a step of firing a laser beam to successively form a further two or more weld beads at the outside of the first weld bead by laser irradiation, the surface hardness of the weld bead increasing from the inside bead to the outside bead.