公开(公告)号：US20250035607A1

公开(公告)日：2025-01-30

申请号：US18716687

申请日：2022-12-06

Applicant: ArcelorMittal

Inventor： Thomas DIEUDONNE

IPC: G01N33/2025 ,  C21D1/26 ,  C21D1/74

Abstract: A method for evaluating the hydrogen content in a steel sheet while being submitted to an annealing process, including the following steps: estimating the microstructure of the steel sheet according to the temperature curve, computing the solubility of the hydrogen CH, computing the volume concentration of trapped hydrogen in dislocations CT and the volume concentration of hydrogen in interstitial sites of the crystal lattice CL, calculating the hydrogen content Ctotal=CL+CT at each time step of the annealing process and outputting the hydrogen content Ctotal at each time step to a user.

公开(公告)号：US20250034674A1

公开(公告)日：2025-01-30

申请号：US18716994

申请日：2022-12-06

Applicant: ArcelorMittal

Inventor： Thomas DIEUDONNE

IPC: C21D11/00 ,  C21D1/26 ,  C21D9/46

Abstract: A method for manufacturing a heat-treated stool sheet, submitted to an annealing process following a temperature curve T as a function of time t in a furnace having atmosphere including hydrogen, in which the hydrogen content targeted in the steel sheet at the end of a step of the annealing process is defined.