公开(公告)号：US10570472B2

公开(公告)日：2020-02-25

申请号：US15102118

申请日：2013-12-10

Applicant: ARCELORMITTAL

Inventor： John Rotole ,  Jonas Staudte ,  Jean-Michel Mataigne

IPC: C21D9/46 ,  C23C8/14 ,  C22C38/38 ,  C21D1/26 ,  C23C2/06 ,  C23C2/28 ,  C23C8/18 ,  C21D1/68 ,  C21D8/02 ,  C23C2/02 ,  C23C8/80 ,  C21D6/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C23C2/40 ,  C21D1/76 ,  C21D9/56

Abstract: A method of annealing of steel sheets is provided which includes a first step consisting in fully oxidizing the surface of such steel sheet thus creating a fully oxided surface layer, a second step consisting in selectively oxidizing elements other than iron of such steel, in an area extending under said fully oxided layer, thus creating a selectively oxided internal layer and a third step consisting in fully reducing said fully oxided surface layer.