公开(公告)号：US20220074029A1

公开(公告)日：2022-03-10

申请号：US17413638

申请日：2019-12-11

Applicant: ArcelorMittal

Inventor： Lode DUPREZ ,  Tom WATERSCHOOT ,  Nele VAN STEENBERGE ,  Laura MOLI SANCHEZ

IPC: C22C38/08 ,  C21D9/08 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/00 ,  C21D8/02 ,  C21D9/46

Abstract: A hot rolled steel having a composition including the following elements, expressed in percentage by weight: 15%≤Nickel≤25% 6%≤Cobalt≤12% 2%≤Molybdenum≤6% 0.1%≤Titanium≤1% 0.0001%≤Carbon≤0.03% 0.002%≤Phosphorus≤0.02% 0%≤Sulfur≤0.005%. 0 %≤Nitrogen≤0.01% and can contain one or more of the following optional elements 0%≤Aluminum≤0.1% 0%≤Niobium≤0.1% 0%≤Vanadium≤0.3% 0%≤Copper≤0.5% 0%≤Chromium≤0.5% the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet comprising in area fraction, 20% to 40% Tempered Martensite, at least 60% of Reverted Austenite and inter-metallic compounds of Molybdenum, Titanium and Nickel.

公开(公告)号：US20250011906A1

公开(公告)日：2025-01-09

申请号：US18894718

申请日：2024-09-24

Applicant: ArcelorMittal

Inventor： Lode DUPREZ ,  Tom WATERSCHOOT ,  Nele VAN STEENBERGE ,  Laura MOLI SANCHEZ

IPC: C22C38/08 ,  C21D8/02 ,  C21D9/08 ,  C21D9/46 ,  C22C38/00 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14

Abstract: A hot rolled steel having a composition including the following elements, expressed in percentage by weight 15%≤Nickel≤25%, 6%≤Cobalt≤12%, 2%≤Molybdenum≤6%, 0.1%≤Titanium≤1%, 0.0001%≤Carbon≤0.03%, 0.002%≤Phosphorus≤0.02%, 0%≤Sulfur≤0.005%, 0%≤Nitrogen≤0.01%, and can contain one or more of the following optional elements 0%≤Aluminum≤0.1%, 0%≤Niobium≤0.1%, 0%≤Vanadium≤0.3%, 0%≤Copper≤0.5%, 0%≤Chromium≤0.5% the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet including in area fraction, 20% to 40% Tempered Martensite, at least 60% of Reverted Austenite and inter-metallic compounds of Molybdenum, Titanium and Nickel.

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.