公开(公告)号：US12104254B2

公开(公告)日：2024-10-01

申请号：US18278429

申请日：2022-03-04

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinichi Yamaguchi

IPC: C23C2/06 ,  B32B15/04 ,  C21D9/46 ,  C22C18/00 ,  C22C18/04 ,  C22C38/00 ,  C23C2/26 ,  C23C22/05 ,  C23C28/00

CPC classification number: C23C2/06 ,  B32B15/04 ,  C21D9/46 ,  C22C18/00 ,  C22C18/04 ,  C22C38/00 ,  C23C2/26 ,  C23C22/05 ,  C23C28/00 ,  C21D2201/03

Abstract: Surface-treated steel including a steel sheet; a plated layer including zinc formed on the steel sheet; and a film formed on the plated layer, the film having a thickness of 100 nm or more and 1000 nm or less, and including an amorphous phase A containing Si, C, O, P, Zn, and V, and one or more selected from the group consisting of Ti, Zr, and Al as constituent elements, with a Zn/Si ratio of peak intensity between Zn and Si, is 1.0 or more, and a mass ratio between V and P, V/P is 0.050 to 1.000 when analyzed by EDS; and an amorphous phase B containing Si, O, and Zn, having a Zn/Si ratio of less than 1.0, and Zn content of the amorphous phase A is 10 mass % or less, when analyzed by EDS.

公开(公告)号：US12054799B2

公开(公告)日：2024-08-06

申请号：US16064596

申请日：2016-12-20

Applicant: ArcelorMittal

Inventor： Maya Gospodinova ,  Véronique Hebert ,  Pavan Venkatasurya

IPC: C21D9/46 ,  B23K11/11 ,  B32B15/01 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/34 ,  C22C38/38 ,  C23C2/06 ,  C23C2/40

CPC classification number: C21D9/46 ,  B23K11/11 ,  B32B15/013 ,  C21D1/18 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0263 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/34 ,  C22C38/38 ,  C23C2/06 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A method for producing a steel sheet is provided. The method includes providing a cold-rolled steel sheet including in weight %: 0.15%≤C≤0.23%, 1.4%≤Mn≤2.6%, 0.6%≤Si≤1.5%, 0.02%≤Al≤1.0%, with 1.0%≤Si+Al≤2.0%, 0≤Nb≤0.035%, 0≤Mo≤0.3%, 0≤Cr≤0.3%, and a remainder of Fe and unavoidable impurities, annealing the steel sheet at an annealing temperature between Ac1 and Ac3 to obtaining at least 40% austenite and at least 40% intercritical ferrite, quenching the sheet from at least 600° C. at a cooling rate of at least 20° C./s to a quenching temperature between 180° C. and 260° C., heating the sheet to a partitioning temperature between 375° C. and 470° C. and maintaining the sheet at this partitioning temperature for a partitioning time Pt between 25 s and 440 s, then cooling the sheet to room temperature. A steel sheet is also provided.

公开(公告)号：US20240117457A1

公开(公告)日：2024-04-11

申请号：US18529599

申请日：2023-12-05

Applicant: ARCELORMITTAL

Inventor： Xavier GARAT ,  Ian Alberto ZUAZO RODRIGUEZ ,  Irène DE DIEGO CALDERON

IPC: C21D9/46 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C21D9/46 ,  B32B15/012 ,  B32B15/013 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0268 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  B32B2605/00 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/005

Abstract: A cold rolled and annealed steel sheet is provided which includes by weight: 0.6

公开(公告)号：US20240091847A1

公开(公告)日：2024-03-21

申请号：US17754862

申请日：2020-11-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Manabu KUBOTA ,  Taketo MAEJIMA

IPC: B21K1/08 ,  C21D9/30 ,  C22C38/00

CPC classification number: B21K1/08 ,  C21D9/30 ,  C22C38/00

Abstract: A crankshaft with improved fatigue strength and machinability is provided. The crankshaft includes a pin and journal, having a chemical composition of, in mass %: 0.40 to 0.60% C; 0.01 to 1.50% Si; 0.4 to 2.0% Mn; 0.01 to 0.50% Cr; 0.20 to 0.50% Al; 0.001 to 0.02% N; up to 0.03% P; 0.005 to 0.20% S; 0.005 to 0.060% Nb; 0 to 0.060% Ti; and balance Fe and impurities, wherein, for each of the pin and journal, the hardness measured at a position at a depth of ¼ of the diameter from the surface is higher than HV 245, the microstructure at that position is mainly composed of ferrite/pearlite, and the fraction of ferrite is not lower than 16%.

公开(公告)号：US11905602B2

公开(公告)日：2024-02-20

申请号：US18106960

申请日：2023-02-07

Applicant: SKF Aerospace France S.A.S

Inventor： Jean-Baptiste Coudert ,  Alexandre Mondelin

IPC: C23C8/32 ,  C21D1/74 ,  C21D9/40 ,  C22C38/00 ,  F16C13/02 ,  F16C19/06

CPC classification number: C23C8/32 ,  C21D1/74 ,  C21D9/40 ,  C22C38/00 ,  F16C13/02 ,  F16C19/06 ,  C21D2211/001

Abstract: A method for reinforcing a steel component, having a carbonitriding step providing a first substep of case-hardening, and a second substep of nitriding, the first and second substeps of case-hardening and of nitriding of the step of carbonitriding the component are performed in one and the same heat treatment cycle.

公开(公告)号：US11890665B2

公开(公告)日：2024-02-06

申请号：US17895404

申请日：2022-08-25

Applicant: PROTERIAL, LTD.

Inventor： Toshihiro Uehara ,  Junichi Nishida

IPC: C22C38/50 ,  B21D53/84 ,  C22C38/58 ,  F16J15/08 ,  C22C38/00 ,  C22C30/00 ,  C22F1/10 ,  C22C19/05 ,  C21D8/04 ,  C21D6/00 ,  C22C38/48 ,  C22C38/54 ,  C22C38/44 ,  C22C38/04 ,  C21D9/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C21D9/46

CPC classification number: B21D53/84 ,  C21D6/004 ,  C21D8/0436 ,  C21D9/0068 ,  C22C19/056 ,  C22C30/00 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C22F1/10 ,  F16J15/08 ,  F16J15/0806 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/004

Abstract: Provided is a metal gasket including, expressed in mass%, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less (including 0%), S: 0.01% or less (including 0%), Ni: 25.0-60.0%, Cr: 10.0-20.0%, either Mo or W alone, or both Mo+W/2: 0.05-5.0%, Al: more than 0.8% to 3.0% or less, Ti: 1.5-4.0%, Nb: 0.05-2.5%, V: 1.0% or less (including 0%), B: 0.001-0.015%, Mg: 0.0005-0.01%, S/Mg: 1.0 or less, N: 0.01% or less (including 0%), and O: 0.005% or less (including 0%), with the remainder being Fe and unavoidable impurities. The metal gasket has a metal structure in which a precipitate γ′ phase having an average equivalent circle diameter of 25 nm or larger is not present within the austenite base.

公开(公告)号：US11873546B2

公开(公告)日：2024-01-16

申请号：US17195850

申请日：2021-03-09

Applicant: POSCO CO., LTD

Inventor： Un-Hae Lee ,  Sung-Kyu Kim ,  Soon-Gi Lee ,  Yong-Jin Kim ,  Hong-Yeol Oh

IPC: C22C38/38 ,  C22C38/00 ,  C21D9/46 ,  C22C38/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/04 ,  C22C38/02 ,  C22C38/06

CPC classification number: C22C38/38 ,  C21D6/005 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C21D2211/001

Abstract: Provided according to one embodiment of the present invention are a non-magnetic steel material and a method for manufacturing the same. The steel material comprises 15-27 wt % of manganese, 0.1-1.1 wt % of carbon, 0.05-0.50 wt % of silicon, 0.03 wt % or less (0% exclusive) of phosphorus, 0.01 wt % or less (0% exclusive) of sulfur, 0.050 wt % or less (0% exclusive) of aluminum, 5 wt % or less (0% inclusive) of chromium, 0.01 wt % or less (0% inclusive) of boron, 0.1 wt % or less (0% exclusive) of nitrogen, and a balance amount of Fe and inevitable impurities, has an index of sensitivity of 3.4 or less, the index of sensitivity being represented by the following relational expression (1): [Relational expression 1]−0.451+34.131*P+111.152*Al−799.483*B+0.526*Cr≤3.4 (wherein [P], [Al], [B] and [Cr] each mean a wt % of corresponding elements), and contains a microstructure with austenite at an area fraction of 95% or greater therein.

公开(公告)号：US20240002992A1

公开(公告)日：2024-01-04

申请号：US18468268

申请日：2023-09-15

Applicant: POSCO CO., LTD

Inventor： Il-Ryoung SOHN ,  Hyeon-Seok HWANG ,  Jong-Sang KIM

IPC: C23C2/06 ,  C22C38/02 ,  C22C38/04 ,  C23C2/02 ,  B21D37/16 ,  B21D22/02 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C23C2/26 ,  C23C2/28

CPC classification number: C23C2/06 ,  C22C38/02 ,  C22C38/04 ,  C23C2/02 ,  B21D37/16 ,  B21D22/02 ,  C21D8/0247 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/00 ,  C21D8/0278 ,  C21D8/0236 ,  C23C2/022 ,  C23C2/261 ,  C23C2/29 ,  B21D22/022

Abstract: Provided is a hot press formed product, which is prepared by means of hot press forming of a Zn—Al—Mg-based plated steel material comprising base iron and a Zn—Al—Mg-based plated layer, and a method for preparing the same, the hot press formed product comprising an oxide layer formed on the surface thereof, wherein the content ratio of Al to Mg (Al/Mg) in the oxide layer is 0.8 or more.

公开(公告)号：US11858045B2

公开(公告)日：2024-01-02

申请号：US17266375

申请日：2019-07-24

Applicant: Hiroshima University ,  Y-tec Corporation ,  KEYLEX CORPORATION ,  Mazda Motor Corporation

Inventor： Kazuhiro Matsugi ,  Yujiao Ke ,  Zhefeng Xu ,  Kenjiro Sugio ,  Yongbum Choi ,  Gen Sasaki ,  Hajime Suetsugu ,  Hiroki Kondo ,  Hideki Manabe ,  Kyotaro Yamane ,  Kenichi Hatakeyama ,  Keizo Kawasaki ,  Tsuyoshi Itaoka ,  Shinsaku Seno ,  Yasushi Tamura ,  Ichirou Ino ,  Yoshihide Hirao

IPC: B22F3/105 ,  B22F3/00 ,  B22F3/14 ,  B22F9/04 ,  C22C33/02 ,  C22C38/00

CPC classification number: B22F3/105 ,  B22F3/004 ,  B22F3/14 ,  B22F9/04 ,  C22C33/0292 ,  C22C38/00 ,  B22F2003/1051 ,  B22F2009/043 ,  B22F2301/35 ,  B22F2302/05

Abstract: Provided is a Fe-based sintered body which has both of a high hardness and a high thermal conductivity and which can be more stably produced. The Fe-based sintered body includes: a matrix (1) containing Fe as a main component; and a hard phase (4) dispersed in the matrix (1). The matrix (1) is formed in a network shape and contains αFe. The hard phase (4) contains TiC.

公开(公告)号：US11837393B2

公开(公告)日：2023-12-05

申请号：US17490800

申请日：2021-09-30

Applicant: REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Jian-Ping Wang ,  Bin Ma ,  Jinming Liu ,  Yiming Wu ,  YanFeng Jiang

IPC: H01F1/06 ,  C22C38/00 ,  B22F1/16 ,  B22F1/054 ,  B22F9/04 ,  C23C8/26 ,  C23C8/50 ,  C23C8/80 ,  H01F1/055 ,  H01F1/059 ,  C22C38/10 ,  B22F1/06

CPC classification number: H01F1/065 ,  B22F1/054 ,  B22F1/0553 ,  B22F1/06 ,  B22F9/04 ,  C22C38/00 ,  C22C38/001 ,  C22C38/10 ,  C23C8/26 ,  C23C8/50 ,  C23C8/80 ,  H01F1/059 ,  H01F1/0551 ,  H01F1/061 ,  B22F1/0547 ,  B22F2301/35 ,  B22F2302/20 ,  B22F2304/054 ,  H01F1/0552

Abstract: Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.