Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020058801 - HOT ROLLED STEEL SHEET WITH HIGH HOLE EXPANSION RATIO AND MANUFACTURING PROCESS THEREOF

Publication Number WO/2020/058801
Publication Date 26.03.2020
International Application No. PCT/IB2019/057571
International Filing Date 09.09.2019
IPC
C21D 8/12 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
12during manufacturing of articles with special electromagnetic properties
C22C 38/02 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/06 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
CPC
C21D 8/1261
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
12during manufacturing of articles with special electromagnetic properties
1244the heat treatment(s) being of interest
1261following hot rolling
C22C 38/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
C22C 38/06
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
Applicants
  • ARCELORMITTAL [LU]/[LU]
Inventors
  • SARKAR, Sujay
Agents
  • PLAISANT, Sophie
Priority Data
PCT/IB2018/05724620.09.2018IB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HOT ROLLED STEEL SHEET WITH HIGH HOLE EXPANSION RATIO AND MANUFACTURING PROCESS THEREOF
(FR) TÔLE D'ACIER LAMINÉE À CHAUD PRÉSENTANT UN TAUX D'EXPANSION DE TROU ÉLEVÉ ET SON PROCÉDÉ DE FABRICATION
Abstract
(EN)
A hot rolled steel sheet having a chemical composition comprising, in weight %: 0.15% ≤ C ≤ 0.20%, 0.50% ≤ Mn ≤ 2.00%, 0.25% ≤ Si ≤ 1.25%, 0.10% ≤ Al ≤ 1.00%, with 1.00% ≤ (Al+Si) ≤ 2.00%, 0.001% ≤ Cr ≤ 0.250%, P ≤0.02%, S ≤ 0.005%, N ≤ 0.008%, and optionally one or more elements among: 0.005% ≤ Mo ≤ 0.250%, 0.005% ≤ V ≤ 0.250%, 0.0001% ≤ Ca ≤ 0.003% and 0.001% ≤ Ti ≤ 0.025%, the remainder being Fe and unavoidable impurities, and wherein the microstructure comprises in surface fraction, ferrite and bainite, the sum of which being greater than 5% and strictly lower than 20%, the remainder consisting of tempered martensite.
(FR)
La présente invention concerne une tôle d'acier laminée à chaud ayant une composition chimique comprenant, en % en poids : 0,15 % ≤ C ≤ 0,20 %, 0,50 % ≤ Mn ≤ 2,00 %, 0,25 % ≤ Si ≤ 1,25 %, 0,10 % ≤ Al ≤ 1,00 %, avec 1,00 % ≤ (Al + Si) ≤ 2,00 %, 0,001 % ≤ Cr ≤ 0,250 %, P ≤ 0,02 %, S ≤ 0,005 %, N ≤ 0,008 %, et éventuellement un ou plusieurs éléments parmi : 0,005 % ≤ Mo ≤ 0,250 %, 0,005 % ≤ V ≤ 0,250 %, 0,0001 % ≤ Ca ≤ 0,003 % et 0,001 % ≤ Ti ≤ 0,025 %, le complément étant constitué de Fe et d'impuretés inévitables, et la microstructure comprenant en fraction de surface, de la ferrite et de la bainite, dont la somme est supérieure à 5 % et strictement inférieure à 20 %, le complément étant constitué de martensite revenue.
Latest bibliographic data on file with the International Bureau