公开(公告)号：US20190352738A1

公开(公告)日：2019-11-21

申请号：US16466742

申请日：2017-12-20

Applicant: ArcelorMittal

Inventor： Frédéric BONNET ,  Van Thang PHAM

IPC: C21D11/00 ,  C21D9/573 ,  G06F17/50 ,  B22D11/20

Abstract: The present invention provides a method of dynamical adjustment for manufacturing a thermally treated steel sheet.

公开(公告)号：US20250091131A1

公开(公告)日：2025-03-20

申请号：US18728089

申请日：2023-01-31

Applicant: ArcelorMittal

Inventor： Frédéric BONNET ,  Valérie DAESCHLER ,  Luis Miguel SANZ MORAL ,  Rosalía REMENTERIA FERNANDEZ ,  Laura DEL RIO FERNANDEZ

IPC: B22F9/08 ,  B22F1/05 ,  B33Y70/00 ,  C22C33/04

Abstract: A ferrous alloy powder for additive manufacturing, obtained by atomization with a gas made of at least 95% in volume of nitrogen, the alloy including carbon up to 0.5 wt. %, titanium up to 11.0 wt. %, boron up to 5 wt. %, manganese up to 30 wt. %, aluminium up to 15 wt. %, silicon up to 1.5 wt. %, vanadium up to 0.5 wt. %, copper up to 2 wt. %, niobium up to 2 wt. %, the remainder being iron and residual elements, the powder including endogenous nitrides and/or carbonitrides of at least one element chosen among a group consisting of titanium, aluminium, boron, vanadium, silicon, and niobium, the nitrogen content of such ferrous alloy powder being above the solubility limit of nitrogen in such alloy, at the atomization temperature. A manufacturing method of such powder is also provided.

公开(公告)号：US20200032368A1

公开(公告)日：2020-01-30

申请号：US16469231

申请日：2017-12-20

Applicant: ArcelorMittal

Inventor： Frédéric BONNET ,  Yannick DOH

IPC: C21D11/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C21D1/667 ,  C23C2/06 ,  C23C2/28 ,  B32B15/01

Abstract: A method for manufacturing a thermally treated steel sheet is described. The method includes: A. preparation step containing: 1) a selection substep, wherein: a. mtarget and a chemical composition are compared to a list of predefined products, whose microstructure contains predefined phases and predefined proportion of phases, and a product having a microstructure mstandard closest to mtarget and TPstandard is selected, including at least a heating, a soaking and a cooling steps, to obtain mstandard, b. a heating path, a soaking path including a soaking temperature Tsoaking, a power cooling of the cooling system and a cooling temperature Tcooling are selected based on TPstandard and 2) a calculation substep, wherein through variation of the cooling power, new cooling paths CPx are calculated based on the product selected in step A.1) a and TPstandard, the initial microstructure mi of the steel sheet to reach mtarget, the heating path, the soaking path comprising Tsoaking and Tcooling, the cooling step of TPstandard is recalculated using said CPx in order to obtain new thermal paths TPx, each TPx corresponding to a microstructure mx, 3) a selection substep wherein one TPtarget to reach mtarget is selected, TPtarget being chosen among the calculated thermal paths TPx and being selected such that mx is the closest to mtarget, and B. a thermal treatment step wherein TPtarget is performed on the steel sheet.

公开(公告)号：US20240182999A1

公开(公告)日：2024-06-06

申请号：US18439463

申请日：2024-02-12

Applicant: ArcelorMittal

Inventor： Frédéric BONNET ,  Van Thang PHAM

IPC: C21D11/00 ,  B22D11/20 ,  C21D9/573 ,  G06F30/17 ,  G06F119/08

CPC classification number: C21D11/005 ,  B22D11/202 ,  C21D9/573 ,  G06F30/17 ,  G06F2119/08

Abstract: The present invention provides a heat treatment line with a method of dynamical adjustment for manufacturing a thermally treated steel sheet.

公开(公告)号：US20220282360A1

公开(公告)日：2022-09-08

申请号：US17751615

申请日：2022-05-23

Applicant: ArcelorMittal

Inventor： Frédéric BONNET ,  Manuel BOBADILLA ,  Bertrand BELE ,  Valérie DAESCHLER

IPC: C22C38/14 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/32

Abstract: A steel sheet has a composition comprising, by weight: 0.010%≤C≤0.080%, 0.06%≤Mn≤3%, Si≤1.5%, 0.005%≤Al≤1.5%, S≤0.030%, P≤0.040%, Ti and B such that: 3.2%≤Ti≤7.5% and (0.45×Ti) −1.35≤B≤(0.45×Ti) −0.43, optionally Ni≤1%, Mo≤1%, Cr≤3%, Nb≤0.1%, V≤0.1%, the remainder being iron and unavoidable impurities resulting from the smelting. The steel sheet has a structure consisting of ferrite, at most 10% of austenite, and precipitates comprising eutectic precipitates of TiB2, the volume fraction of TiB2 precipitates with respect to the whole structure being of at least 9%, the proportion of TiB2 precipitates having a surface area lower than 8 μm2 being of at least 96%.

公开(公告)号：US20200040426A1

公开(公告)日：2020-02-06

申请号：US16469485

申请日：2017-12-20

Applicant: ArcelorMittal

Inventor： Frédéric BONNET

IPC: C21D11/00 ,  C21D9/46 ,  C21D8/02 ,  C23C2/06 ,  B32B15/01

Abstract: A method for manufacturing a thermally treated steel sheet is described. The method includes: A. a preparation step including: 1) a selection substep, wherein the chemical composition and mtarget are compared to a list of predefined products, which microstructure includes predefined phases and predefined proportion of phases, and selecting a product having a microstructure mstandard closest to mtarget and a predefined thermal path TPstandard to obtain mstandard, 2) a calculation substep, wherein at least two thermal path TPx, each TPx corresponding to a microstructure mx obtained at the end of TPx, are calculated based on the selected product of step A.1) and TPstandard and the initial microstructure mi of the steel sheet to reach mtarget, 3) an selection substep, wherein one thermal path TPtarget to reach mtarget is selected, TPtarget chosen from TPx and selected such that mx is the closest to mtarget, B. a thermal treatment step, wherein TPtarget is performed on the steel sheet.

公开(公告)号：US20190352739A1

公开(公告)日：2019-11-21

申请号：US16469930

申请日：2017-12-20

Applicant: ArcelorMittal

Inventor： Frédéric BONNET

IPC: C21D11/00 ,  C21D9/46 ,  C22C38/38 ,  C22C38/28 ,  C22C38/22 ,  C22C38/20 ,  C22C38/00

Abstract: The present invention describes a method of dynamical adjustment for manufacturing a thermally treated steel sheet. The method includes: A. a control step, wherein at least one sensor detects a deviation happening during the thermal treatment, B. a calculation step performed when the deviation is detected during the thermal treatment such that a new thermal path TPtarget is determined to reach mtarget taking the deviation into account, such calculation step including: 1) a calculation substep, wherein at least two thermal path, TPx corresponding to one microstructure mx obtained at the end of TPx, are calculated based on TT and the microstructure mi of the steel sheet to reach mtarget, 2) a selection substep wherein one new thermal path TPtarget to reach mtarget is selected, TPtarget being chosen from said TPx and being selected such that mx is the closest to mtarget, C. a new thermal treatment step, wherein TPtarget is performed online on the steel sheet.

公开(公告)号：US20240026491A1

公开(公告)日：2024-01-25

申请号：US18110036

申请日：2023-02-15

Applicant: ArcelorMittal

Inventor： Frédéric BONNET ,  Yannick DOH

IPC: C21D11/00 ,  B32B15/01 ,  C21D1/667 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C23C2/06 ,  C23C2/28

CPC classification number: C21D11/005 ,  B32B15/012 ,  B32B15/013 ,  C21D1/667 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0236 ,  C21D9/46 ,  C23C2/06 ,  C23C2/29 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A method for manufacturing a thermally treated steel sheet is described. The method includes:



A. preparation step containing:

1) a selection substep, wherein:

a. mtarget and a chemical composition are compared to a list of predefined products, whose microstructure contains predefined phases and predefined proportion of phases, and a product having a microstructure mstandard closest to mtarget and TPstandard is selected, including at least a heating, a soaking and a cooling steps, to obtain mstandard,
b. a heating path, a soaking path including a soaking temperature Tsoaking, a power cooling of the cooling system and a cooling temperature Tcooling are selected based on TPstandard and


2) a calculation substep, wherein through variation of the cooling power, new cooling paths CPx are calculated based on the product selected in step A.1)a and TPstandard, the initial microstructure mi of the steel sheet to reach mtarget, the heating path, the soaking path comprising Tsoaking and Tcooling, the cooling step of TPstandard is recalculated using said CPx in order to obtain new thermal paths TPx, each TPx corresponding to a microstructure mx,
3) a selection substep wherein one TPtarget to reach mtarget is selected, TPtarget being chosen among the calculated thermal paths TPx and being selected such that mx is the closest to mtarget, and


B. a thermal treatment step wherein TPtarget is performed on the steel sheet.

公开(公告)号：US20230257839A1

公开(公告)日：2023-08-17

申请号：US18014434

申请日：2021-07-07

Applicant: ArcelorMittal

Inventor： Frédéric BONNET ,  Valérie DAESCHLER ,  Thierry MASTRORILLO

IPC: C21C7/00 ,  B22D11/00 ,  C21C7/06 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/46

CPC classification number: C21C7/0037 ,  B22D11/001 ,  C21C7/06 ,  C21C7/0087 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C22C38/46 ,  C21C2007/0018

Abstract: A method of casting a steel semi-product from a liquid steel, the steel semi-product having a targeted composition in titanium of at least 3.5% in weight.

公开(公告)号：US20230054179A1

公开(公告)日：2023-02-23

申请号：US17785675

申请日：2020-12-14

Applicant: ArcelorMittal

Inventor： Rosalia REMENTERIA FERNANDEZ ,  Frédéric BONNET ,  Maria Elena CORRAL CORRALES ,  Carla OBERBILLIG

IPC: B22F9/08 ,  B22F10/25 ,  B22F10/28 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54

Abstract: A metal powder for additive manufacturing having a composition including the following elements, expressed in content by weight: 0.01%≤C≤0.2%, 4.6%≤Ti≤10%, (0.45×Ti)−0.22%≤B≤(0.45×Ti)+0.70%, S≤0.03%, P≤0.04%, N≤0.05%, O≤0.05% and optionally containing: Si≤1.5%, Mn≤3%, Al≤1.5%, Ni≤1%, Mo≤1%, Cr≤3%, Cu≤1%, Nb≤0.1%, V≤0.5% and including eutectic precipitates of TiB2 and Fe2B, the balance being Fe and unavoidable impurities resulting from the elaboration, the volume percentage of TiB2 being equal or more than 10% and the mean bulk density of the powder being 7.50 g/cm3 or less. A manufacturing method by atomization is also provided.