公开(公告)号：US12247274B2

公开(公告)日：2025-03-11

申请号：US17060493

申请日：2020-10-01

Applicant: ArcelorMittal

Inventor： Patrick Barges ,  Ian Alberto Zuazo Rodriguez

IPC: C22C38/04 ,  C21D6/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

Abstract: A method of production of a cold rolled and heat treated steel sheet has the following steps: providing a cold rolled steel sheet with a composition including the following elements, expressed in percent by weight: 0.15%≤carbon≤0.6%, 4%≤manganese≤20%, 5%≤aluminum≤15%, 0≤silicon≤2%, aluminum+ silicon≥6.5%, a remainder being composed of iron and unavoidable impurities caused by processing; heating said cold rolled steel sheet up to a soaking temperature between 80° and 950° C. during less than 600 seconds, then cooling the sheet down to a temperature in a range of 600° C. to room temperature, reheating the steel sheet to a soaking temperature of 150° C. to 600° C. during 10 s to 250 h, then cooling the sheet.

公开(公告)号：US11549163B2

公开(公告)日：2023-01-10

申请号：US16772379

申请日：2018-12-18

Applicant: ArcelorMittal

Inventor： Patrick Barges ,  Ian Alberto Zuazo Rodriguez

IPC: C22C38/08 ,  C22C38/02 ,  C21D8/02 ,  C21D9/46 ,  C22C38/04 ,  C22C38/06

Abstract: A cold rolled and heat treated steel sheet having a composition including the following elements, expressed in % by weight: 0.1%≤carbon≤0.6% 4%≤manganese≤20% 5%≤aluminum≤15% 0≤silicon≤2% aluminium+silicon+nickel≥6.5% and can possibly contain one or more of the following optional elements: 0.01%≤niobium≤0.3%, 0.01%≤titanium≤0.2% 0.01%≤vanadium≤0.6% 0.01%≤copper≤2.0% 0.01%≤nickel≤2.0% cerium≤0.1% boron≤0.01% magnesium≤0.05% zirconium≤0.05% molybdenum≤2.0% tantalum≤2.0% tungsten≤2.0% the remainder being composed of iron and unavoidable impurities caused by processing, wherein the microstructure of said steel sheet includes in area fraction, 10 to 50% of austenite, the austenite phase optionally including intragranular kappa carbides, the remainder being regular ferrite and ordered ferrite of D03 structure (Fe,Mn,X)3Al, optionally including up to 2% of intragranular kappa carbides (Fe,Mn)3AlCx said steel sheet presenting a ultimate tensile strength higher than or equal to 900 MPa. It also deals with a manufacturing method and with use of such grade for making vehicle parts.

公开(公告)号：US12060629B2

公开(公告)日：2024-08-13

申请号：US18077594

申请日：2022-12-08

Applicant: ArcelorMittal

Inventor： Patrick Barges ,  Ian Alberto Zuazo Rodriguez

IPC: C22C38/08 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C22C38/08 ,  C21D8/0205 ,  C21D8/0236 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D2211/001 ,  C21D2211/005

Abstract: A method of production of a cold rolled and heat treated steel sheet having the following steps: providing a cold rolled steel sheet with a composition with the following elements, expressed in percent by weight: 0.10%≤carbon≤0.6%; 4%≤manganese≤20%; 5%≤aluminum≤15%; 0≤silicon≤2% aluminium+silicon+nickel≥6.5%; and optionally at least one of certain optional elements; a remainder being composed of iron and unavoidable impurities caused by processing; heating the cold rolled steel sheet up to a soaking temperature between 750 and 950° C. during less than 600 seconds, then cooling the sheet down to room temperature; and reheating the steel sheet to a soaking temperature of 150° C. to 600° C. during 10 s to 1000 h, then further cooling the sheet.

公开(公告)号：US12247273B2

公开(公告)日：2025-03-11

申请号：US16466959

申请日：2016-12-22

Applicant: ArcelorMittal

Inventor： Patrick Barges ,  Ian Alberto Zuazo Rodriguez

IPC: C22C38/04 ,  C21D6/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

Abstract: A cold rolled and heat treated steel sheet having a composition containing the following elements, expressed in percent by weight: 0.15%≤carbon≤0.6%; 4%≤manganese≤20%; 5%≤aluminum≤15%; 0≤silicon≤2%; aluminum+silicon≥6.5%; and possibly one or more of the following elements: 0.01%≤niobium≤0.3%; 0.01%≤titanium≤0.2%; 0.01%≤vanadium≤0.6%; 0.01%≤copper≤2.0%; 0.01%≤nickel≤2.0%; cerium≤0.1%; boron≤0.01%; magnesium≤0.05%; zirconium≤0.05%; molybdenum≤2.0%; tantalum≤2.0%; tungsten≤2.0%; the remainder being composed of iron and unavoidable impurities caused by processing, wherein the microstructure of said steel sheet contains in area fraction, 10 to 50% of austenite, the reminder being regular ferrite and ordered ferrite of D03 structure. A manufacturing method and use of the steel sheet for making vehicle parts is also described.