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：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：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：US20230030877A1

公开(公告)日：2023-02-02

申请号：US17785611

申请日：2019-12-20

Applicant: ArcelorMittal

Inventor： Valérie DAESCHLER ,  Frédéric BONNET ,  Rosalia REMENTERIA FERNANDEZ ,  Diego Alejandro SEGOVIA PEREZ

IPC: B22F1/065 ,  B22F1/052 ,  C22C1/03 ,  C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00

Abstract: A metal powder for additive manufacturing having a composition including the following elements, expressed in content by weight: 0.01%≤C≤0.2%, 2.5%≤Ti≤10%, (0.45×Ti)−1.35%≤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 optionally of Fe2B, the balance being Fe and unavoidable impurities resulting from the elaboration, the metal powder having a mean roundness of at least 0.70. The invention also relates to its manufacturing method by argon atomization.