公开(公告)号：US20230203617A1

公开(公告)日：2023-06-29

申请号：US18177109

申请日：2023-03-01

申请人： ArcelorMittal

发明人： Martin BEAUVAIS ,  Alice DUMONT ,  Alexandre GIBOT ,  Astrid PERLADE ,  Kangying ZHU

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

CPC分类号： C21D9/50 ,  B32B15/013 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0405 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  B32B2605/00 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008

摘要： 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：US20240254586A1

公开(公告)日：2024-08-01

申请号：US18625591

申请日：2024-04-03

申请人： ArcelorMittal

发明人： Sebastian COBO ,  Christian ALLELY ,  Martin BEAUVAIS ,  Anis AOUAFI ,  Emmanuel LUCAS

IPC分类号： C21D9/48 ,  B32B15/01 ,  C21D1/673 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

CPC分类号： C21D9/48 ,  B32B15/012 ,  B32B15/013 ,  C21D1/673 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/022 ,  C23C2/024 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C21D2211/002 ,  C21D2211/008

摘要： A method for manufacture of a hot-rolled steel sheet which includes: producing a liquid steel to which manganese, silicon, niobium, and chromium are added, the additions being made in a vacuum chamber, then desulfurizing the liquid metal without increasing its nitrogen content, then adding titanium, said additions being made so as to obtain a liquid metal having a chemical composition where the titanium and nitrogen contents satisfy: Ti/N>3.42, and the carbon, manganese, chromium, and silicon contents satisfy: 2.6C+Mn/5.3+Cr/13+Si/15>=1.1%, then casting a semi-finished product, then heating said semi-finished product to a temperature between 1250° C. and 1300° C. for a holding period at this temperature between 20 minutes and 45 minutes, then hot rolling said semi-finished product to a rolling end temperature TFL between 825° C. and 950° C., to obtain a hot-rolled sheet, then coiling said hot-rolled sheet at a temperature between 500° C. and 750° C. to obtain a hot-rolled and coiled sheet, then pickling the oxide layer formed in the previous steps.

公开(公告)号：US20230203616A1

公开(公告)日：2023-06-29

申请号：US18177108

申请日：2023-03-01

申请人： ArcelorMittal

发明人： Martin BEAUVAIS ,  Alice DUMONT ,  Alexandre GIBOT ,  Astrid PERLADE ,  Kangying ZHU

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

CPC分类号： C21D9/50 ,  B32B15/013 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0405 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  B32B2605/00 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008

摘要： 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：US20240002993A1

公开(公告)日：2024-01-04

申请号：US18038104

申请日：2021-12-03

申请人： ArcelorMittal

发明人： Clément PHILIPPOT ,  Alice DUMONT ,  Deborah HERRY ,  Martin BEAUVAIS

IPC分类号： C23C2/12 ,  C22C38/38 ,  C22C38/28 ,  C22C38/00 ,  C22C38/32 ,  C22C38/02 ,  C22C38/06 ,  C21D8/02 ,  C21D1/02 ,  C23C2/40 ,  B21C47/02 ,  C21D1/673 ,  C23C2/02 ,  C23G1/08

CPC分类号： C23C2/12 ,  C22C38/38 ,  C22C38/28 ,  C22C38/001 ,  C22C38/002 ,  C22C38/32 ,  C22C38/02 ,  C22C38/06 ,  C21D8/0257 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/0273 ,  C21D1/02 ,  C23C2/40 ,  B21C47/02 ,  C21D1/673 ,  C21D8/0278 ,  C23C2/024 ,  C23G1/08 ,  C21D2211/008 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/001

摘要： A coated steel sheet and press hardened steel part having a composition including, by weight percent: C 0.15-0.25%, Mn 0.5-1.8%, Si 0.1-1.25%, Al 0.01-0.1%, Cr 0.1-1.0%, Ti 0.01-0.1%, B 0.001-0.004%, P≤0.020%, S≤0.010%, N≤0.010% the remainder of the composition being iron and unavoidable impurities resulting from the smelting. The press hardened steel part includes a bulk having a microstructure including, in surface fraction, more than 95% of martensite and less than 5% of bainite, a coating layer at the surface of the steel part, a ferritic interdiffusion layer between the coating layer and the bulk, and a ratio between the ferritic grain width in the interdiffusion layer GWint over prior austenite grain size in the bulk PAGSbulk, satisfying following equation (GWint/PAGSbulk)−1≥30%.

公开(公告)号：US20230019292A1

公开(公告)日：2023-01-19

申请号：US17943561

申请日：2022-09-13

申请人： ArcelorMittal

发明人： Sebastian COBO ,  Christian ALLELY ,  Martin BEAUVAIS ,  Anis AOUAFI ,  Emmanuel LUCAS

IPC分类号： C21D9/48 ,  C22C38/02 ,  C22C38/44 ,  C22C38/54 ,  C21D8/02 ,  C21D1/673 ,  C22C38/00 ,  C22C38/50 ,  C21D6/00 ,  C23C2/06 ,  C22C38/48 ,  C22C38/06 ,  C23C2/40 ,  B32B15/01 ,  C23C2/28 ,  C23C2/02 ,  C23C2/12 ,  C22C38/04

摘要： A rolled steel sheet, for press hardening is provided, having a chemical composition where Ti/N>3.42, and the carbon, manganese, chromium and silicon contents satisfy: 2.6 C + Mn 5.3 + Cr 13 + Si 15 ≥ 1.1 % . The sheet has a nickel content Nisurf at any point of the steel in the vicinity of the surface over a depth Δ, such that: Nisurf>Ninom, Ninom denoting the nominal nickel content of the steel, and such that, Nimax denoting the maximum nickel content within Δ: ( Ni max + Ni nom ) 2 × ( Δ ) ≥ 0.6 , and such that: ( Ni max - Ni nom ) Δ ≥ 0.01 and the surface density of all of the particles Di , and the surface density of the particles D(>2 μm) larger than 2 micrometers satisfy, at least to a depth of 100 micrometers in the vicinity of the surface of said sheet: Di+6.75 D(>2 μm) 2 μm) being expressed as number of particles per square millimeter, and said particles denoting all the oxides, sulfides, and nitrides, either pure or combined such as oxysulfides and carbonitrides, present in the steel matrix.

公开(公告)号：US20230167557A1

公开(公告)日：2023-06-01

申请号：US18095520

申请日：2023-01-10

申请人： ArcelorMittal

发明人： Thomas HENRION ,  Ronan JACOLOT ,  Martin BEAUVAIS

IPC分类号： C23C28/02 ,  C22C33/04 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D7/13 ,  B32B15/01

CPC分类号： C23C28/025 ,  C22C33/04 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D7/13 ,  B32B15/016

摘要： A method for manufacturing a hot-rolled and coated steel sheet having a thickness between 1.8 mm and 5 mm. The method contains the steps of: providing a semi-product having a composition containing: 0.04%≤C≤0.38%, 0.40%≤Mn≤3%, 0.005%≤Si≤0.70%, 0.005%≤Al≤0.1%, 0.001%≤Cr≤2%, 0.001%≤Ni≤2%, 0.001%≤Ti≤0.2%, Nb≤0.1%, B≤0.010%, 0.0005%≤N≤0.010%, 0.0001%≤S≤0.05%, 0.0001%≤P≤0.1%, Mo≤0.65%, W≤0.30%, Ca≤0.006%, hot-rolling with a final rolling temperature FRT, to obtain a hot-rolled steel product having a thickness between 1.8 mm and 5 mm, then cooling down to a coiling temperature Tcoil satisfying: 450° C.≤Tcoil≤Tcoilmax with Tcoilmax=650−140×fγ, Tcoilmax being expressed in degrees Celsius and fγ designating the austenite fraction just before the coiling, and coiling to obtain a hot-rolled steel substrate, pickling and coating the hot-rolled steel substrate with Al or an Al alloy by continuous hot-dipping in a bath, to obtain a hot-rolled and coated steel sheet containing a hot-rolled steel sheet and an Al or an Al alloy coating, having a thickness between 10 and 33 μm, on each side of the hot-rolled steel sheet.

公开(公告)号：US20200224297A1

公开(公告)日：2020-07-16

申请号：US16349864

申请日：2017-11-23

申请人： ArcelorMittal

发明人： Thomas HENRION ,  Ronan JACOLOT ,  Martin BEAUVAIS

IPC分类号： C22C38/50 ,  C22C38/48 ,  C22C38/02 ,  C22C38/04 ,  C21D8/02 ,  C23C2/12 ,  B21D22/02 ,  C23C2/40

摘要： A method for manufacturing a hot-rolled and coated steel sheet having a thickness between 1.8 mm and 5 mm. The method contains the steps of: providing a semi-product having a composition containing: 0.04%≤C≤0.38%, 0.40%≤Mn≤3%, 0.005%≤Si≤0.70%, 0.005%≤Al≤0.1%, 0.001%≤Cr≤2%, 0.001%≤Ni≤2%, 0.001%≤Ti≤0.2%, Nb≤0.1%, B≤0.010%, 0.0005%≤N≤0.010%, 0.0001%≤S≤0.05%, 0.0001%≤P≤0.1%, Mo≤0.65%, W≤0.30%, Ca≤0.006%, hot-rolling with a final rolling temperature FRT, to obtain a hot-rolled steel product having a thickness between 1.8 mm and 5 mm, then cooling down to a coiling temperature Tcoil satisfying: 450° C.≤Tcoil≤Tcoilmax with Tcoilmax=650−140×fγ, Tcoilmax being expressed in degrees Celsius and fγ designating the austenite fraction just before the coiling, and coiling to obtain a hot-rolled steel substrate, pickling and coating the hot-rolled steel substrate with Al or an Al alloy by continuous hot-dipping in a bath, to obtain a hot-rolled and coated steel sheet containing a hot-rolled steel sheet and an Al or an Al alloy coating, having a thickness between 10 and 33 μm, on each side of the hot-rolled steel sheet.

公开(公告)号：US20200149129A1

公开(公告)日：2020-05-14

申请号：US16616937

申请日：2018-06-01

申请人： ArcelorMittal

发明人： Martin BEAUVAIS ,  Alice DUMONT ,  Alexandre GIBOT ,  Astrid PERLADE ,  Kangying ZHU

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

摘要： 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