Laser welded joint and manufacturing method of laser welded joint

Abstract

A laser welded joint (1) including: a plurality of steel sheets (11) and (12); and a weld metal (20) configured to join the plurality of steel sheets (11) and (12), in which at least one of the plurality of steel sheets (11) and (12) is a high strength steel sheet having Vickers hardness of 320 HV or more, an amount of Al penetrated from base metal of the plurality of steel sheets (11) and (12) is more than 0.10 mass % and 2.10 mass % or less, an average Al content of the weld metal (20) is 0.30 mass % or more and 2.00 mass % or less, when the average Al content, an average Si content, and an average Mn content of the weld metal (20) are denoted by [Al], [Si], and [Mn], Expression (1) ([Al]/([Al]+[Si]+[Mn])≥0.150) is satisfied, and slag containing Al covers 30.0% or more of a surface of the weld metal (20), and a manufacturing method thereof.

Dependencies are inferred from the claim text.