公开(公告)号：WO2023002269A1

公开(公告)日：2023-01-26

申请号：PCT/IB2022/055737

申请日：2022-06-21

Applicant: ARCELORMITTAL

Inventor： WANG, Zhifen ,  CHIOCCA, Alexis

IPC: B23K11/11 ,  B23K11/16 ,  B23K11/24 ,  B23K103/04 ,  B23K103/20 ,  B23K101/34 ,  B23K11/00 ,  B23K11/20

Abstract: The invention relates to a welding method for the manufacture of an assembly of at least two steel substrates spot welded together through at least one spot welded joint, comprising: A. The provision of said substrates (3, 3') wherein a first one is a press hardened steel part obtained by press hardening of a steel sheet coated with an aluminium based coating, B. The application of a spot-welding cycle with a spot-welding machine, comprising welding electrodes (1,T) and a spot-welding power source (2) applying a current, through said substrates, said cycle (21) consisting of: - at least three pulsations (22, 32, 42), each having the same maximum pulsation current (Cp) applied through said substrates, each pulsation duration p being identical and set from 20 to 60 ms, - each pulsation being followed by the same cooling time c set from 30 to 50 ms, wherein the welding parameter Wp value is at least 0.8, Wp being defined as Wp = (t x c)/p t being the average thickness of the substrate in mm, c being the cooling time in ms, p being the pulsation duration in ms.

公开(公告)号：WO2023002239A1

公开(公告)日：2023-01-26

申请号：PCT/IB2021/056661

申请日：2021-07-23

Applicant: ARCELORMITTAL

Inventor： WANG, Zhifen ,  CHIOCCA, Alexis

IPC: B23K11/11 ,  B23K11/16 ,  B23K11/24 ,  B23K103/04 ,  B23K103/20 ,  B23K103/34

Abstract: The invention relates to a welding method for the manufacture of an assembly of at least two steel substrates spot welded together through at least one spot welded joint, comprising: A. The provision of said substrates (3, 3') wherein a first one is a press hardened steel part obtained by press hardening of a steel sheet coated with an aluminium based coating, B. The application of a spot-welding cycle with a spot-welding machine, comprising welding electrodes (1,1') and a spot-welding power source (2) applying a current, through said substrates, said cycle (21) consisting of: - at least three pulsations (22, 32, 42), each having the same maximum pulsation current (Cp) applied through said substrates, each pulsation duration p being identical and set from 20 to 60 ms, - each pulsation being followed by the same cooling time c set from 30 to 50 ms, wherein the welding parameter Wp value is at least 0.8, Wp being defined as Wp = (t x c)/p t being the average thickness of the substrate in mm, c being the cooling time in ms, p being the pulsation duration in ms.