公开(公告)号：US20240425944A1

公开(公告)日：2024-12-26

申请号：US18703766

申请日：2021-10-28

Applicant: ArcelorMittal

Inventor： Laura MARTINEZ TARANILLA ,  Lode DUPREZ ,  Laura MOLI SANCHEZ ,  Tom WATERSHOOT ,  Atish KUMAR HATUI

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/32 ,  C22C38/38

Abstract: A hot rolled steel sheet having a composition including the following elements 0.38%≤Carbon≤0.5%, 1%≤Manganese≤2%, 0.1%≤Silicon≤0.7%, 0 01%≤Aluminum≤0.1%, 0.3%≤Chromium≤1%, 0.002%≤Boron≤0.05%, 0.002%≤Phosphorus≤0.02%, 0%≤Sulfur≤0.005%, 0%≤Nitrogen≤0.01%, 0%≤Molybdenum≤0.5%, 0%≤Vanadium≤0.5%, 0%≤Niobium≤0.05%, 0.001%≤Titanium≤0.1%, 0%≤Nickel≤1%, 0%≤Copper≤1%, 0%≤Tin≤0.1%, 0%≤Lead≤0.1%, 0%≤Antimony≤0.1%, 0.0001%≤Calcium≤0.01%, 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 94% Martensite, 0% to 5% Residual Austenite and carbides of Chromium, Niobium, Vanadium and Iron from 0% to 5%.