公开(公告)号：US20230011220A1

公开(公告)日：2023-01-12

申请号：US17785115

申请日：2020-12-18

Applicant: ArcelorMittal

Inventor： Manuel SANCHEZ PONCELA ,  Nele VAN STEENBERGE ,  Florencia GATTI ,  Sandra RODRIGUEZ

IPC: C22C38/40 ,  B33Y70/00 ,  B22F1/065 ,  B22F1/052 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/56 ,  C22C38/02

Abstract: A metal powder having a composition including the following elements, expressed in content by weight: 6.5%≤Si≤10%, 4.5%≤Nb≤10%, 0.2%≤B≤2.0%, 0.2%≤Cu≤2.0%, C≤2% and optionally containing Ni≤10 wt % and/or Co≤10 wt % and/or Cr≤7 wt % and/or Zr as a substitute for any part of Nb on a one-to-one basis and/or Mo as a substitute for any part of Nb on a one-to-one basis and/or P as a substitute for any part of Si on a one-to-one basis, the balance being Fe and unavoidable impurities resulting from the elaboration, the metal powder having a microstructure including at least 5% in area fraction of an amorphous phase, the balance being made of crystalline ferritic phases with a grain size below 20 μm and possible precipitates, the metal powder having a mean sphericity SPHT of at least 0.80.