公开(公告)号：US20240392405A1

公开(公告)日：2024-11-28

申请号：US18693424

申请日：2021-09-29

Applicant: ArcelorMittal

Inventor： Tom WATERSCHOOT ,  Arunim RAY ,  Rénald DAVID

IPC: C21D9/46 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

Abstract: A cold rolled and heat treated steel sheet having a composition including of the following elements, 0.05%≤Carbon≤0.12%, 1.0%≤Manganese≤2%, 0.01%≤Silicon≤0.5%, 0.01%≤Aluminum≤0.1%, 0.01%≤Niobium≤0.1%, 0%≤Phosphorus≤0.09%, 0%≤Sulfur≤0.09%, 0%≤Nitrogen≤0.09%, 0.1%≤Chromium≤0.5%, 0%≤Nickel≤3%, 0%≤Titanium≤0.1%, 0%≤Calcium≤0.005%, 0%≤Copper≤2%, 0%≤Molybdenum≤0.5%, 0%≤Vanadium≤0.1%, 0%≤Boron≤0.003%, 0%≤Cerium≤0.1%, 0%≤Magnesium≤0.010%, 0%≤Zirconium≤0.010% the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet including in area fraction, 50 to 90% Recrystallized ferrite, 10 to 50% non-recrystallized ferrite, 0% to 15% Cementite and 0.5% to 2% Carbides of Niobium, wherein the cumulated amount of Recrystallized ferrite and Non-recrystallized ferrite is at least 85%.

公开(公告)号：US20230058956A1

公开(公告)日：2023-02-23

申请号：US17783926

申请日：2020-12-15

Applicant: ArcelorMittal

Inventor： Dorien DE KNIJF ,  Lode DUPREZ ,  Koenraad THEUWISSEN ,  Tom WATERSCHOOT

IPC: C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/00 ,  C22C38/60 ,  C22C38/12 ,  C22C38/14

Abstract: A hot rolled steel sheet having a composition including the following elements, 0.18%≤Carbon≤0.3%, 1.8%≤Manganese≤4.5%. 0.8%≤Silicon≤2%,0 001%≤Aluminum ≤0.2%, 0.1%≤Molybdenum≤1%, 0.001%≤Titanium≤0.2%, 0.0001%≤Boron≤0.01%, 0%≤Phosphorus≤0.09%, 0%≤Sulfur≤0.09%.,0%≤Nitrogen≤0.09%, 0%≤Chromium≤0.5%, 0%≤Niobium≤0.1%, 0%≤Vanadium≤0.5%, 0%≤Nickel≤1%, 0%≤Copper≤1%, 0%≤Calcium≤0.005%, 0%≤Magnesium≤0.0010% the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet including in area fraction, of at least 70% martensite, 8% to 25% residual austenite, wherein the shape factor of the residual austenite is between 4 and 12.

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：US20240368723A1

公开(公告)日：2024-11-07

申请号：US18687274

申请日：2021-08-31

Applicant: ArcelorMittal

Inventor： Dorien DE KNIJF ,  Tom WATERSCHOOT ,  Ulrike LORENZ ,  Lode DUPREZ ,  Lieven BRACKE

IPC: C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

Abstract: A hot rolled steel sheet having a composition including of the elements, 0.02%≤Carbon≤0.2%, 3%≤Manganese≤9%, 0.2%≤Silicon≤1.2%, 0.9%≤Aluminum≤2.5%, 0%≤Phosphorus≤0.03%, 0%≤Sulfur≤0.03%, 0%≤Nitrogen≤0.025%, 0%≤Molybdenum≤0.6%, 0%≤Titanium≤0.1%, 0.0001%≤Boron≤0.01%, 0%≤Chromium≤0.5%, 0%≤Niobium≤0.1%, 0%≤Vanadium≤0.15%, 0%≤Nickel≤1%, 0%≤Copper≤1%, 0%≤Calcium≤0.005%, 0%≤Magnesium≤0.0010%, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet including in area fraction, at least 60% of tempered martensite, 15% to 40% residual austenite, 0% to 10% polygonal ferrite, 0% to 5% of bainite, 0 to 15% of fresh martensite and 0% to 5% of carbides of Niobium, Titanium, Vanadium or Iron.

公开(公告)号：US20240425956A1

公开(公告)日：2024-12-26

申请号：US18686951

申请日：2021-08-31

Applicant: ArcelorMittal

Inventor： Dorien DE KNIJF ,  Tom WATERSCHOOT ,  Ulrike LORENZ ,  Lode DUPREZ ,  Lieven BRACKE

IPC: C22C38/04 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/06

Abstract: A hot rolled steel sheet having a composition including, 0.02%≤Carbon≤0.2%, 3%≤Manganese≤9%, 0.2%≤Silicon≤1.2%, 0.9%≤Aluminum≤2.5%, 0%≤Phosphorus≤0.03%, 0%≤Sulfur≤0.03%, 0%≤Nitrogen≤0.025%, 0%≤Molybdenum≤0.6%, 0%≤Titanium≤0.1%, 0.0001%≤Boron≤0.01%, 0%≤Chromium≤0.5%, 0%≤Niobium≤0.1%, 0%≤Vanadium≤0.2%, 0%≤Nickel≤1%, 0%≤Copper≤1%, 0%≤Calcium≤0.005%, 0%≤Magnesium≤0.0010% the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet including in area fraction, at least 60% of tempered martensite, 15% to 40% residual austenite, 0% to 10% polygonal ferrite, 0% to 5% of bainite, 0 to 15% of fresh martensite and 0% to 5% of carbides of Niobium, Titanium, Vanadium or Iron.

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：US20210348245A1

公开(公告)日：2021-11-11

申请号：US17278085

申请日：2019-09-25

Applicant: ArcelorMittal

Inventor： Eva DIAZ GONZALEZ ,  Lieven BRACKE ,  Tom WATERSCHOOT ,  Joost DESTRYCKER

IPC: C21D8/02 ,  C22C38/00 ,  C21D9/46 ,  C22C38/54 ,  C22C38/48 ,  C22C38/50 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/58 ,  C22C38/02 ,  C22C38/06 ,  C21D6/00

Abstract: A hot rolled steel product having a composition including in percentage by weight: 0.06%≤C≤0.18%, 0.01%≤Ni≤0.6%, 0.001%≤Cu≤2%, 0.001%≤Cr≤2%, 0.001%≤Si≤0.8%, 0%≤N≤0.008%, 0%≤P≤0.03%, 0%≤S≤0.03%, 0.001%≤Mo≤0.5%, 0.001%≤Nb≤0.1%, 0.001%≤V≤0.5%, 0.001%≤Ti≤0.1% and one or more following optional elements 0.2%≤Mn≤2%, 0.005%≤Al≤0.1%, 0%≤B≤0.003%, 0%≤Ca≤0.01%, 0%≤Mg≤0.010% the remainder composition being composed of iron and unavoidable impurities caused by processing, such product having a tertiary scale layer including, in area fraction, a total amount of at least 50% of magnetite and ferrite wherein ferrite is at least 25%, 0% to 50% of wustite, and 0% to 10% of hematite, such scale layer having a thickness between 5 microns and 40 microns.