MUMBAI, India, June 26 -- Intellectual Property India has published a patent application (202617068827 A) filed by Arcelormittal on June 01, 2026, for Forged Part Of Steel And A Method Of Manufacturing Thereof.
Inventors include Smanio, Vronique; and Picot, Thomas.
The application for the patent was published on June 19, 2026, under issue no. 25/2026.
Abstract: A steel part for the transmission system of an automobile comprising a core made of the following elements0.15% ? C ? 0.25%; 1.0% ? Mn ?1.6%; 0.4% ? Si ? 0.9%; 0.001% ? Al ? 0.1 %; 0.10% ? Mo ? 0.5%;1% ? Cr ? 1.5 %; 0 ? P ? 0.09%; 0 ? S ? 0.09%; 0% ? N ? 0.09%; 0 ? Nb ? 0.06%; 0% ? Ni ? 1%; 0% ? V? 0.2%; 0% ? Ti ? 0.1%; 0% ? Cu? 1%; 0% ? B ? 0.008%; 0% ? Sn? 0.1%; 0% ? Ce ? 0.1%; 0% ? Mg ? 0.10%; 0% ? Zr ? 0.10%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the core of said steel part comprising, by area percentage, at least 90% of Martensite, with a cumulative optional presence of any one or more from Residual Austenite, Pearlite, ferrite and Bainite from 1% to 10% and precipitates of Aluminum and/or Niobium in form of AlN and/or Nb (C,N), wherein the percentage of grains with prior austenite grains size from 3 to 5 is limited to a maximum of 10% of the total grains, such steel part comprising a martensitedeficient layer till the depth of 1mm or less on all its surfaces, such martensite deficient layer comprising from 55% to 72% of martensite, 10% to 40% residual austenite and the remainder being any one or more from bainite, ferrite or cementite.
Disclaimer: Curated by HT Syndication.
