Arcelormittal

Arcelormittal Investigacion Y Desarrollo, S.l.

Tom Waterschoot

Antoine Moulin

Véronique Hebert

Lode Duprez

Catherine Vinci

Nele Van Steenberge

Mohamed Goune

Eva Diaz Gonzalez

Joost Destrycker

Lieven Bracke

Dorien De Knijf

Laura Moli Sanchez

Koenraad Theuwissen

Gloria Restrepo Garces

Veronique Sardoy

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.

Hot rolled and steel sheet and a method of manufacturing thereof

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.

High strength hot rolled steel having excellent scale adhesivness and a method of manufacturing the same

A hot rolled steel having a composition including the following elements, expressed in percentage by weight:

Hot rolled steel and a method of manufacturing thereof

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Lokeren, Belgium

Tom Waterschoot