公开(公告)号：US20240158885A1

公开(公告)日：2024-05-16

申请号：US18549589

申请日：2022-02-14

Applicant: JFE STEEL CORPORATION

Inventor： Kenichi OSUKA ,  Maiko WATANABE ,  Shinsuke KOMINE ,  Hideyuki TAKAHASHI

IPC: C21D11/00 ,  C21D8/02 ,  C21D9/60 ,  C23C2/00

CPC classification number: C21D11/00 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C21D9/60 ,  C23C2/004 ,  C21D2211/001

Abstract: To provide continuous annealing equipment, a continuous annealing method, a method of producing cold-rolled steel sheets and a method of producing coated or plated steel sheets which enable a quick response to fluctuations in material properties and enable minimization of fluctuations in mechanical properties of products. The continuous annealing equipment is continuous annealing equipment for steel sheets including, in this order, a heating zone (6) and a soaking zone (7), the soaking zone (7) including a first soaking zone (7A) and a second soaking zone (7B) provided after the first soaking zone (7A), the continuous annealing equipment including: a first induction heating device (9) provided between first soaking zone (7A) and a second soaking zone (7B); and a measuring device (10) configured to measure austenite fractions of the steel sheets at an exit of the second soaking zone (7B).