公开(公告)号：US11959150B2

公开(公告)日：2024-04-16

申请号：US17470257

申请日：2021-09-09

Applicant: ArcelorMittal

Inventor： Emmanuel Dechassey ,  Christophe Silvy-Leligois ,  Francisco Chicharro Herranz ,  Vicente Polo Mestre ,  Marie-Christine Theyssier ,  Thierry Celotto ,  Christine Kaczynski ,  Thomas Dupuy ,  Quang-Tien Ngo

IPC: C21D9/46 ,  B21B15/00 ,  B23K11/00 ,  B23K11/04 ,  B23K26/20 ,  C21D8/02 ,  C21D9/50 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23G1/00 ,  B23K103/04

CPC classification number: C21D9/46 ,  B21B15/0085 ,  B23K11/0073 ,  B23K11/04 ,  B23K26/206 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/50 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23G1/00 ,  B23K2103/04 ,  C21D2211/008

Abstract: A steel sheet that is welded and then cold rolled to a thickness between 0.5 mm and 3 mm, the deformation ratio created by cold rolling in the base metal is equal to εMB, for which the deformation ratio created by the cold rolling in the welded joint is equal to εS, where:




0.4
≤

ɛS

ɛ
⁢
M
⁢
B

公开(公告)号：US11220723B2

公开(公告)日：2022-01-11

申请号：US16088287

申请日：2017-02-27

Applicant: ArcelorMittal

Inventor： Emmanuel Dechassey ,  Christophe Silvy-Leligois ,  Francisco Chicharro Herranz ,  Vicente Polo Mestre ,  Marie-Christine Theyssier ,  Thierry Celotto ,  Christine Kaczynski ,  Thomas Dupuy ,  Quang-Tien Ngo

IPC: C21D9/46 ,  C21D8/02 ,  C21D9/50 ,  B23K11/00 ,  B23K11/04 ,  B23K26/20 ,  B21B15/00 ,  C23G1/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  B23K103/04

Abstract: A method for the manufacture of a cold-rolled steel sheet of thickness ef between 0.5 mm and 3 mm is provided. At least two hot-rolled sheets of thickness ei are supplied and butt welded, so as to create a welded joint (S1) with a direction perpendicular to the direction of hot rolling. The at least two hot-rolled sheets are pickled by continuous passage through a bath, then the assembly is cold rolled, in a step (L1), to an intermediate thickness eint, the direction of cold rolling (DL1) coinciding with the direction of hot rolling. The cold rolling is carried out with a reduction ratio ɛ 1 = Ln ⁡ ( e i e int ) such that: 0 . 3 ⁢ 5 ≤ Ln ⁢ ⁢ ( ei e ⁢ ⁢ int ) Ln ⁢ ⁢ ( e ⁢ i e ⁢ f ) ≤ 0 . 6 ⁢ 5 , then the welded joint (S1) is removed so as to obtain at least two intermediate cold-rolled sheets. Then the two intermediate cold-rolled sheets are butt welded, so as to create a welded joint (S2), the direction of which is perpendicular to the direction of hot rolling, then the assembly of the at least two intermediate cold-rolled and welded sheets is cold-rolled, in a step (L2), to the final thickness ef, the direction (DL2) of the cold rolling step (L2) coinciding with the direction of rolling (DL1).