公开(公告)号：US20220072658A1

公开(公告)日：2022-03-10

申请号：US17417265

申请日：2018-12-24

Applicant: ArcelorMittal

Inventor： Francis SCHMIT ,  Maria POIRIER ,  Cristian ALVAREZ ,  Lucille GOUTON ,  Thierry DAVID ,  Ivan VIAUX

IPC: B23K26/26 ,  B23K26/322

Abstract: A method for producing a welded steel blank (1) includes providing two precoated sheets (2), each comprising a steel substrate (3) having a precoating (5) on each of its two main faces (4), each sheet (2) comprising, on each main face (4), at a weld edge (14), a removal zone (18) in which the precoating (5) is removed over a removal fraction; and butt welding the sheets (2) using a filler wire (20) so as to create a weld joint (22) having an aluminum content AlWJ comprised between 0.1 wt. % and 1.2 wt. %. The composition of the wire (20) and the proportion of wire (20) added is such that the weld joint (22) has: (a) a quenching factor FTWJ such that FTWJ−0.96FTBM≥0, (b) a nickel content NiWJ≤14−3.4×AlWJ and a chromium content CrWJ≤5−2×AlWJ, where AlWJ is the aluminum content of the weld joint (22).