公开(公告)号：US11447844B2

公开(公告)日：2022-09-20

申请号：US17087916

申请日：2020-11-03

Applicant: ArcelorMittal

Inventor： Jean Marc Pipard ,  Astrid Perlade ,  Bastien Weber ,  Florence Pechenot ,  Aurelie Milani

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/12 ,  C21D6/00 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C23C2/06 ,  C23C2/40 ,  C21D8/04

Abstract: A method for the fabrication of a hot rolled steel includes providing a liquid metal comprising a certain chemical composition; carrying out a vacuum or SiCa treatment, the chemical composition including, expressed by weight 0.0005%≤Ca≤0.005%, if a SiCA treatment is carried out; dissolving quantities of Ti and N in the liquid metal so as to satisfy (% [Ti])×(% [N])

公开(公告)号：US10858716B2

公开(公告)日：2020-12-08

申请号：US15325690

申请日：2015-07-10

Applicant: ArcelorMittal

Inventor： Jean Marc Pipard ,  Astrid Perlade ,  Bastien Weber ,  Florence Pechenot ,  Aurelie Milani

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/12 ,  C21D6/00 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C23C2/06 ,  C23C2/40 ,  C21D8/04

Abstract: The present invention provides a hot rolled steel sheet with yield stress greater than 680 MPa and less than or equal to 840 MPa a tensile strength between 780 MPa and 950 MPa, elongation at failure greater than 10% and hole-expansion ratio (Ac) greater than or equal to 45%. The chemical composition includes, with the contents expressed by weight: 0.05%≤Mo≤0.35%, 0.15

公开(公告)号：US10272514B2

公开(公告)日：2019-04-30

申请号：US14907429

申请日：2014-07-22

Applicant: ArcelorMittal

Inventor： Astrid Perlade ,  Samuel Vignier ,  Frederic Kegel ,  Artem Arlazarov

IPC: B23K11/11 ,  C21D8/02 ,  C21D8/04 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C21D9/50 ,  B22D11/00 ,  C21D6/00 ,  C22C38/00 ,  C22C38/06 ,  C23C2/06 ,  C23C2/12 ,  B23K101/18 ,  B23K103/04 ,  B23K11/16 ,  C22C38/14 ,  B23K101/34

Abstract: The present invention provides a spot welded joint of at least two steel sheets. At least one of the steel sheets presents yield strength above or equal to 600 MPa, an ultimate tensile strength above or equal to 1000 MPa, uniform elongation above or equal to 15%. The base metal chemical composition includes 0.05≤C≤0.21%, 4.0≤Mn≤7.0%, 0.5≤Al≤3.5%, Si≤2.0%, Ti≤0.2%, V≤0.2%, Nb≤0.2%, P≤0.025%, B≤0.0035%, and the spot welded joint contains a molten zone microstructure containing more than 0.5% of Al and containing a surface fraction of segregated areas lower than 1%, said segregated areas being zones larger than 20 μm2 and containing more than the steel nominal phosphorus content.

公开(公告)号：US20160194739A1

公开(公告)日：2016-07-07

申请号：US14901931

申请日：2014-07-03

Applicant: ArcelorMittal Investigacion y Desarrollo SL

Inventor： Franco Del Frate ,  Jean-Michel Mataigne ,  Jonas Stauddte ,  Astrid Perlade ,  Ian Alberto Zuazo-Rodriquez

IPC: C22C38/38 ,  C23C2/02 ,  C23C14/24 ,  C23C14/02 ,  C23C14/14 ,  C25D3/22 ,  C25D5/36 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  B22D11/00 ,  C23C2/06

CPC classification number: C22C38/38 ,  B22D11/001 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/74 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0221 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C21D9/46 ,  C21D9/52 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/34 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C2/02 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C14/02 ,  C23C14/14 ,  C23C14/16 ,  C23C14/24 ,  C23C14/58 ,  C23C14/5806 ,  C23C28/021 ,  C23C28/023 ,  C23C28/025 ,  C23C28/322 ,  C23C28/3225 ,  C23C30/00 ,  C23C30/005 ,  C25D3/22 ,  C25D5/36 ,  Y10T428/1259 ,  Y10T428/12611 ,  Y10T428/12618 ,  Y10T428/1266 ,  Y10T428/12667 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A cold rolled and hot dip coated steel sheet presenting a tensile strength above 1000−50×Al MPa, a uniform elongation above 15% and a low density is provided. The steel includes, by weight percent: 0.1≦C≦0.5%, 3.5≦Mn≦10.0%, 0≦Al≦9.0%, Si≦5.0%, Ti≦0.2%, V≦0.2%, Nb≦0.2%, S≦0.004%, P≦0.025%, 0.5≦Si+Al≦9.0%, B≦0.0035, Cr≦1%, The balance being Fe and impurities and the microstructure containing 25% to 90% of ferrite, 10% to 50% of austenite, kappa precipitates lower than 5% and martensite lower than 25%. The steel is able to be coated using total oxidation.

Abstract translation: 提供抗拉强度高于1000-50×Al MPa，均匀伸长率高于15％和低密度的冷轧和热浸镀钢板。 该钢包括以重量百分比计：0.1％和0.1％; C＆NlE; 0.5％，3.5％和1％; Mn和nlE; 10.0％，0％和1％; Al和nlE; 9.0％Si和NlE; 5.0％Ti和NlE; 0.2％ ，S＆nlE; 0.004％，P＆nlE; 0.025％，0.5＆nlE; Si + Al＆nlE; 9.0％，B＆nlE; 0.0035，Cr＆nlE; 1％，余量为Fe和杂质，微结构包含25％至90％的铁素体，10％ 至50％的奥氏体，卡巴沉淀物低于5％，马氏体低于25％。 钢可以使用全氧化涂层。

公开(公告)号：US11920208B2

公开(公告)日：2024-03-05

申请号：US16954510

申请日：2018-12-18

Applicant: ArcelorMittal

Inventor： Coralie Jung ,  Astrid Perlade ,  Kangying Zhu ,  Frédéric Kegel

IPC: C21D9/46 ,  B23K11/16 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  B23K101/00

CPC classification number: C21D9/46 ,  B23K11/16 ,  B32B15/012 ,  B32B15/013 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/0224 ,  C23C2/06 ,  C23C2/12 ,  C23C2/29 ,  C23C2/40 ,  B23K2101/006 ,  C21D2211/001 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008

Abstract: A cold-rolled and heat-treated steel sheet, has a composition comprising, by weight percent: n0.10%≤C≤0.25%, 3.5%≤Mn—≤6.0%, 0.5%≤Si≤2.0%, 0.3%≤Al≤1.2%, with Si+Al≥0.8%, 0.10%≤Mo≤0.50%, S≤0.010%, P≤0.020%, N≤0.008%. The cold-rolled steel sheet has a microstructure consisting of, in surface fraction: between 10% and 45% of ferrite, having an average grain size of at most 1.3 μm, the product of the surface fraction of ferrite by the average grain size of the ferrite being of at most 35 μm %, between 8% and 30% of retained austenite, the retained austenite having an Mn content higher than 1.1*Mn %, Mn % designating the Mn content of the steel, at most 8% of fresh martensite, at most 2.5% of cementite and partitioned martensite.

公开(公告)号：US20210130921A1

公开(公告)日：2021-05-06

申请号：US17087916

申请日：2020-11-03

Applicant: ArcelorMittal

Inventor： Jean Marc Pipard ,  Astrid Perlade ,  Bastien Weber ,  Florence Pechenot ,  Aurelie Milani

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/12 ,  C21D6/00 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C23C2/06 ,  C23C2/40

Abstract: A method for the fabrication of a hot rolled steel includes providing a liquid metal comprising a certain chemical composition; carrying out a vacuum or SiCa treatment, the chemical composition including, expressed by weight 0.0005%≤Ca≤0.005%, if a SiCA treatment is carried out; dissolving quantities of Ti and N in the liquid metal so as to satisfy (% [Ti])×(% [N])

公开(公告)号：US20170101694A1

公开(公告)日：2017-04-13

申请号：US15374827

申请日：2016-12-09

Applicant: ArcelorMittal France

Inventor： Astrid Perlade ,  Olivier Bouaziz ,  Xavier Garat ,  Josée Drillet ,  Jean-Louis IRIARTE

IPC: C21D9/46 ,  C22C38/50 ,  C22C38/48 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/44

CPC classification number: C21D9/46 ,  C21D6/005 ,  C21D8/021 ,  C21D8/0215 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/041 ,  C21D8/0415 ,  C21D8/0426 ,  C21D8/0436 ,  C21D2211/005 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50

Abstract: A cold-rolled and annealed ferritic steel sheet is provided. The steel has a composition comprising, expressed by weight: 0.001≦C≦0.15%; Mn≦1%; Si≦1.5%; 7.5%≦AI≦10%; 0.020%≦Ti≦0.5%; S≦0.050%; and P≦0.1%. A balance of the composition includes iron and inevitable impurities resulting from the smelting. The structure includes kappa (κ) precipitates and equiaxed ferrite, an average grain size dα of the equiaxed ferrite is less than 50 microns, and a linear fraction f of intergranular κ precipitates is less than 30%. The linear fraction f is defined by f = Σ ( A )  di Σ ( A )  Li . Σ(A)di denotes the total length of grain boundaries containing κ precipitates relative to an area (A) and Σ(A)Li denotes the total length of the grain boundaries relative to the area (A). A content of carbon in solid solution is less than 0.005% by weight, and the cold-rolled and annealed ferritic steel sheet has a thickness between 0.6 mm and 1.5 mm. A skin part or structural part for the automotive field is also provided.

公开(公告)号：US11965225B2

公开(公告)日：2024-04-23

申请号：US18097492

申请日：2023-01-16

Applicant: ArcelorMittal

Inventor： Coralie Jung ,  Astrid Perlade ,  Kangying Zhu ,  Frédéric Kegel

IPC: C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/32 ,  C23C2/06 ,  C23C2/12

CPC classification number: C21D9/46 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/32 ,  C23C2/06 ,  C23C2/12 ,  C21D2211/001 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008

Abstract: A cold-rolled and heat treated steel sheet, has a composition comprising 0.1%≤C≤0.4%, 3.5%≤Mn≤8.0%, 0.1%≤Si≤1.5%, Al≤3%, Mo≤0.5%, Cr≤1%, Nb≤0.1%, Ti≤0.1%, V≤0.2%, B≤0.004%, 0.002%≤N≤0.013%, S≤0.003%, P≤0.015%. The structure consists of, in surface fraction: between 8 and 50% of retained austenite, at most 80% of intercritical ferrite, the ferrite grains, if any, having an average size of at most 1.5 μm, and at most 1% of cementite, the cementite particles having an average size lower than 50 nm, martensite and/or bainite.

公开(公告)号：US11629388B2

公开(公告)日：2023-04-18

申请号：US16616937

申请日：2018-06-01

Applicant: ArcelorMittal

Inventor： Martin Beauvais ,  Alice Dumont ,  Alexandre Gibot ,  Astrid Perlade ,  Kangying Zhu

IPC: C21D9/50 ,  C21D9/46 ,  C21D8/04 ,  B32B15/01 ,  C21D6/00 ,  C22C38/38 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C38/32

Abstract: A steel sheet for the manufacture of a press hardened part is provided, having a composition of: 0.15%≤C≤0.22%, 3.5%≤Mn

公开(公告)号：US11530461B2

公开(公告)日：2022-12-20

申请号：US16766328

申请日：2018-11-21

Applicant: ArcelorMittal

Inventor： Kangying Zhu ,  Astrid Perlade ,  Coralie Jung ,  Frederic Kegel

IPC: C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  B23K11/11 ,  B23K11/16 ,  B32B15/01 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D1/25 ,  C21D9/48 ,  C22C38/14 ,  C22C38/16 ,  C23C2/12 ,  C21D8/04 ,  C22C38/38 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/18 ,  C21D1/34 ,  C21D1/26 ,  B32B15/04 ,  B32B15/18 ,  C23C2/26 ,  C23C2/40 ,  C23C30/00 ,  B23K101/00 ,  C23C2/06

Abstract: A cold-rolled and heat-treated steel sheet having a microstructure consisting of, in surface fraction: between 10% and 30% of retained austenite, the retained austenite being present as films having an aspect ratio of at least 3 and as Martensite Austenite islands, less than 8% of the Martensite Austenite islands having a size above 0.5 μm, at most 1% of fresh martensite, at most 50% of tempered martensite, and recovered martensite containing precipitates of at least one element chosen among niobium, titanium and vanadium. A method for manufacturing the cold-rolled and heat-treated steel sheet is also described.