公开(公告)号：US20220380861A1

公开(公告)日：2022-12-01

申请号：US17771874

申请日：2020-10-20

Applicant: ArcelorMittal

Inventor： Raisa GRIGORIEVA ,  Florin DUMINICA ,  Brahim NABI ,  Pascal DRILLET ,  Thierry STUREL

IPC: C21D1/18 ,  C21D1/26 ,  C21D1/76 ,  C21D8/02 ,  C21D9/48 ,  C23C2/06 ,  C23C2/12

Abstract: A press hardening method includes the following steps: A. the provision of a steel sheet for heat treatment, precoated with a zinc- or aluminum-based pre-coating for anti-corrosion purpose, B. the deposition of a hydrogen barrier pre-coating over a thickness from 10 to 550 nm, C. the batch annealing of the precoated steel sheet in an inert atmosphere to obtain a pre-alloyed steel sheet, D. the cutting of the pre-alloyed steel sheet to obtain blank, E. the thermal treatment of the blank to obtain a fully austenitic microstructure in the steel, F. the transfer of the blank into a press tool, G. the hot-forming of the blank to obtain a part, H. the cooling of the part obtained at step G).

公开(公告)号：US20220002834A1

公开(公告)日：2022-01-06

申请号：US17479050

申请日：2021-09-20

Applicant: ArcelorMittal

Inventor： Pascal DRILLET ,  Dominique Spehner ,  Ronald Kefferstein

IPC: C21D9/46 ,  B32B15/01 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40

Abstract: A pre-coated steel strip is provided. The steel strip includes a strip of base steel having a length, a width, a first side, and a second side. The length of the strip is at least 100 m and the width is at least 600 mm. An aluminum or an aluminum alloy pre-coating is on at least part of at least one of the first or second sides of the strip of base steel. A thickness tp of the pre-coating is from 20 to 33 micrometers at every location on at least one of the first or second sides. Processes, coated stamped products and land motor vehicles are also provided.

公开(公告)号：US20190271056A1

公开(公告)日：2019-09-05

申请号：US16413799

申请日：2019-05-16

Applicant: ArcelorMittal

Inventor： Pascal DRILLET ,  Dominique Spehner ,  Ronald Kefferstein

IPC: C21D9/46 ,  C23C2/40 ,  C23C2/26 ,  C23C2/12 ,  B32B15/01

Abstract: A pre-coated steel strip is provided. The steel strip includes a strip of base steel having a length, a width, a first side, and a second side. The length of the strip is at least 100 m and the width is at least 600 mm. An aluminum or an aluminum alloy pre-coating is on at least part of at least one of the first or second sides of the strip of base steel. A thickness tp of the pre-coating is from 20 to 33 micrometers at every location on at least one of the first or second sides. Processes, coated stamped products and land motor vehicles are also provided.

公开(公告)号：US20170260603A1

公开(公告)日：2017-09-14

申请号：US15606770

申请日：2017-05-26

Applicant: ArcelorMittal

Inventor： Pascal DRILLET ,  Dominique Spehner ,  Ronald Kefferstein

IPC: C21D9/46 ,  C23C2/26 ,  C23C2/40 ,  B32B15/01 ,  C23C2/12

Abstract: A pre-coated steel strip is provided. The steel strip includes a strip of base steel having a length, a width, a first side, and a second side. The length of the strip is at least 100 m and the width is at least 600 mm. An aluminum or an aluminum alloy pre-coating is on at least part of at least one of the first or second sides of the strip of base steel. A thickness tp of the pre-coating is from 20 to 33 micrometers at every location on at least one of the first or second sides. Processes, coated stamped products and land motor vehicles are also provided.

公开(公告)号：US20250003023A1

公开(公告)日：2025-01-02

申请号：US18882017

申请日：2024-09-11

Applicant: ARCELORMITTAL

Inventor： Alexandre BLAISE ,  Pascal DRILLET ,  Thierry STUREL

IPC: C21D9/48 ,  C21D1/673 ,  C21D8/04 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

Abstract: A non-stamped prealloyed steel coil, sheet or blank includes a heat-treatable steel substrate covered by an alloyed precoating containing aluminum and iron, aluminum not being present as free aluminum; and an interdiffusion layer at an interface between the steel substrate and the precoating, with a thickness between 2 and 16 micrometers, the interdiffusion layer being a layer with an α(Fe) ferritic structure, having Al and Si in solid solution.

公开(公告)号：US20240309484A1

公开(公告)日：2024-09-19

申请号：US18670943

申请日：2024-05-22

Applicant: ArcelorMittal

Inventor： Pascal DRILLET ,  Dominique SPEHNER ,  Ronald KEFFERSTEIN

IPC: C21D9/46 ,  B32B15/01 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40

CPC classification number: C21D9/46 ,  B32B15/012 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12757

Abstract: A hot stamped coated steel product, the hot stamped coated steel product comprising: a base steel; and a coating having a thickness of including, proceeding from the base steel outwards: (a) an interdiffusion layer, (b) an intermediate layer, (c) an intermetallic layer, and (d) a superficial layer, the base steel having a composition comprising: 0.15%

公开(公告)号：US20240110256A1

公开(公告)日：2024-04-04

申请号：US18537158

申请日：2023-12-12

Applicant: ArcelorMittal

Inventor： Pascal DRILLET ,  Dominique SPEHNER ,  Ronald KEFFERSTEIN

IPC: C21D9/46 ,  B32B15/01 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40

CPC classification number: C21D9/46 ,  B32B15/012 ,  C23C2/12 ,  C23C2/26 ,  C23C2/40 ,  Y10T428/12389 ,  Y10T428/12396 ,  Y10T428/12757

Abstract: A method of forming a hot stamped coated steel product includes providing a precoated steel strip, the precoated steel strip including a base steel having a first side and a second side, and a precoating on at least one of the first side and the second side, the precoating being made of aluminum or an aluminum alloy; heating the precoated steel strip in a furnace, wherein the precoated strip experiences a temperature rise at a heating rate (Vc) between 4° and 12° C./s, wherein Vc is a mean heating rate between 20 and 700 C; removing the heated precoated steel strip from the furnace; and then hot stamping the precoated strip to deform the precoated steel strip into a hot stamped coated steel product, the hot stamped coated steel product having a coating including, proceeding from the base steel outwards: (a) an interdiffusion layer, (b) an intermediate layer, (c) an intermetallic layer, and (d) a superficial layer.

公开(公告)号：US20220380905A1

公开(公告)日：2022-12-01

申请号：US17771892

申请日：2020-10-20

Applicant: ArcelorMittal

Inventor： Raisa GRIGORIEVA ,  Florin DUMINICA ,  Brahim NABI ,  Pascal DRILLET ,  Thierry STUREL

IPC: C23C28/02 ,  C21D8/02 ,  C21D9/46

Abstract: A press hardening method including: A. provision of a steel sheet for heat treatment, being optionally precoated with a zinc- or aluminum-based pre-coating, B. deposition of a hydrogen barrier pre-coating comprising chromium and not comprising nickel over a thickness from 10 to 550 nm, C. cutting of the precoated steel sheet to obtain a blank, D. heat treatment of the blank at a furnace temperature from 800 to 970° C., during a dwell time from 1 to 12 minutes, in an atmosphere having an oxidizing power equal or higher than that of an atmosphere consisting of 1% by volume of oxygen and equal or smaller than that of an atmosphere consisting of 50% by volume of oxygen, such atmosphere having a dew point between −30 and +30° C., E. transfer of the blank into a press tool, F. hot-forming at a temperature from 600 to 830° C. to obtain a part, G. cooling of the part obtained at step E).

公开(公告)号：US20170260599A1

公开(公告)日：2017-09-14

申请号：US15609841

申请日：2017-05-31

Applicant: ArcelorMittal

Inventor： Juan David PUERTA VELASQUEZ ,  Jonas STAUDTE ,  Pascal DRILLET

IPC: C21D8/02 ,  C23C2/28 ,  C22C38/32 ,  C22C38/28 ,  C23C2/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/00 ,  C23C2/12 ,  B32B15/01 ,  C22C38/06

CPC classification number: C21D8/0278 ,  B32B15/012 ,  B32B15/013 ,  C21D1/34 ,  C21D1/52 ,  C21D1/673 ,  C21D1/74 ,  C21D1/76 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0457 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

Abstract: A cold-rolled sheet is provided. The cold-rolled sheet includes a steel substrate with a carbon content C0 between 0.07% and 0.5%, expressed by weight, and a metal pre-coating on at least the two principal faces of the steel substrate. The substrate has a decarburized area on the surface of each of the two principal faces. The depth p50% of the decarburized area is between 6 and 30 micrometers, and p50% is the depth at which the carbon content is equal to 50% of the content C0. The sheet does not contain a layer of iron oxide between the substrate and the metal pre-coating.

公开(公告)号：US20150203932A1

公开(公告)日：2015-07-23

申请号：US14575475

申请日：2014-12-18

Applicant: ARCELORMITTAL FRANCE

Inventor： Pascal DRILLET ,  Damien ORMSTON

IPC: C21D8/02 ,  C21D6/00 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C22C38/00 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/06 ,  C22C38/02 ,  C21D9/46 ,  C22C38/38

CPC classification number: C21D8/0263 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  Y10T428/12757 ,  Y10T428/12799

Abstract: The invention relates to a hot-rolled steel sheet having a tensile strength greater than 800 MPa and an elongation at break greater than 10%, the composition of which comprises, the contents being expressed by weight: 0.050%≦C≦0.090%, 1%≦Mn≦2%, 0.015%≦Al≦0.050%, 0.1%≦Si≦0.3%, 0.10%≦Mo≦0.40%, S≦0.010%, P≦0.025%, 0.003%≦N≦0.009%, 0.12%≦V≦0.22%, Ti≦0.005%, Nb≦0.020% and, optionally, Cr≦0.45%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the sheet or the part comprising, as a surface fraction, at least 80% upper bainite, the possible complement consisting of lower bainite, martensite and residual austenite, the sum of the martensite and residual austenite contents being less than 5%.

Abstract translation: 本发明涉及一种抗拉强度大于800MPa，断裂伸长率大于10％的热轧钢板，其组成包括：其含量按重量计：0.050％＆lt; 1E; C＆lt; lE; 0.090％ 1％＆nlE; Mn＆nlE; 2％，0.015％＆nlE; Al＆nlE; 0.050％，0.1％＆lt; NlE; Si＆NlE; 0.3％，0.10％＆nlE; Mo＆NlE; 0.40％，S＆lt; E; 0.010％，P＆NlE; 0.025％，0.003％ N＆amp; NlE; 0.009％，0.12％＆nlE; V＆lt; ll; 0.22％，Ti＆nlE; 0.005％，Nb＆nlE; 0.020％和任选的Cr＆nlE; 0.45％，由冶炼产生的铁和不可避免的杂质， 的片材或部分，作为表面部分，包含至少80％的上贝氏体，可能的补体由下贝氏体，马氏体和残余奥氏体组成，马氏体和残余奥氏体含量的总和小于5％。