公开(公告)号：US20240401162A1

公开(公告)日：2024-12-05

申请号：US18690821

申请日：2022-08-26

Applicant: ArcelorMittal

Inventor： Sebastian COBO ,  Alice DUMONT ,  Pascal DIETSCH ,  Stéphanie MICHAUT

IPC: C21D1/18 ,  C21D1/673 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C23C2/06 ,  C23C2/12

Abstract: A press hardened steel part having a composition including, by weight percent: C 0.2-0.34%, Mn 0.50-1.24%, Si 0.5-2%, P≤0.020%, S≤0.010%, N≤0.010%, and including optionally one or more of the following elements: Al: ≤0.2%, Cr≤0.8%, Nb≤0.06%, Ti≤0.06%, B≤0.005%, Mo≤0.35% the remainder of the composition being iron and unavoidable impurities resulting from the smelting. The press hardened steel part has a microstructure including, in surface fraction, 95% or more of tempered martensite and 5% or less of bainite, austenite or ferrite.