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：US20250010350A1

公开(公告)日：2025-01-09

申请号：US18709293

申请日：2022-11-08

Applicant: ArcelorMittal

Inventor： Alexandre BLAISE ,  Christophe TALLON

IPC: B21D22/02 ,  B21D37/01 ,  B21D37/16 ,  B33Y80/00

Abstract: A hot stamping die (2,3) including a die body (11) having a work face (9) which is in contact with a blank during the hot stamping operation, and at least one porous die portion (4) having a corresponding porous work face portion (7), the porous die body portion being in contact with a reservoir (6, 40), the reservoir (6, 40) containing a cooling medium (8), and the porous die body portion including a plurality of ejection channels (5) extending from the reservoir (6, 40) to the porous work face portion, wherein the ejection channels (5) are configured to eject the cooling medium (8) from the reservoir (6, 40) towards the porous work face portion (7) when the pressure on the cooling medium is increased above a threshold ejection pressure, and wherein the die (2,3) does not include any discharge channels to evacuate excess ejected coolant from the dies after hot stamping.

公开(公告)号：US20240320397A1

公开(公告)日：2024-09-26

申请号：US18575847

申请日：2022-07-08

Applicant: ArcelorMittal

Inventor： Nicolas SCHNEIDER ,  Alexandre BLAISE ,  Elie GIBEAU

IPC: G06F30/23 ,  G06F113/24 ,  G06F119/18

CPC classification number: G06F30/23 ,  G06F2101/14 ,  G06F2113/24 ,  G06F2119/18

Abstract: A computerized method to determine the aptitude of a metallic part to be manufactured by roll forming and to classify metallic parts into one of the following categories: roll-formable without modification, roll-formable with modifications, not roll-formable. It also provides for a computerized method to compute the roll forming direction of a part. It further provides a method for determining the aptitude to roll forming of a large set of parts, such as for example part of the set of parts making up an automotive vehicle. The purpose of the current invention is further to provide a manufacturing method for a metallic part.