公开(公告)号：US20240133490A1

公开(公告)日：2024-04-25

申请号：US18547172

申请日：2022-02-25

Applicant: BAOSHAN IRON & STEEL CO., LTD.

Inventor： Wen SUN ,  Yaoheng LIU ,  Zhonghua ZHANG ,  Ping HU ,  Yannan MA

IPC: F16L9/02 ,  C21D1/84 ,  C21D6/00 ,  C21D8/10 ,  C21D9/08 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

CPC classification number: F16L9/02 ,  C21D1/84 ,  C21D6/005 ,  C21D6/008 ,  C21D8/105 ,  C21D9/085 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D2211/002

Abstract: The present disclosure provides a bainite geological drilling pipe, comprising the following chemical elements in percentage by mass: 0.14-0.22% of C, 0.2-0.55% of Si, 2.1-2.9% of Mn, 0.01-0.04% of Nb, 0.015-0.04% of Al, 0.001-0.005% of B, 0

公开(公告)号：US20240133014A1

公开(公告)日：2024-04-25

申请号：US18400261

申请日：2023-12-29

Applicant: ThyssenKrupp Steel Europe AG

Inventor： Maria Köyer ,  Manuela Ruthenberg ,  Janko Banik ,  Ulrich Etzold

IPC: C23C2/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/32 ,  C23C2/28 ,  C23C2/40 ,  C23F15/00

CPC classification number: C23C2/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/32 ,  C23C2/28 ,  C23C2/40 ,  C23F15/00

Abstract: A method for manufacturing a sheet metal component including: annealing a flat steel product comprising 0.05-0.5% C, 0.5-3% Mn, 0.06-1.7% Si, ≤0.06% P, ≤0.01% S, ≤1.0% Al, ≤0.15% Ti, ≤0.6% Nb, ≤0.01% B, ≤1.0% Cr, ≤1.0% Mo, ≤1.0% Cr+Mo, ≤0.2% Ca, ≤0.1% V, remainder iron and impurities in a continuous furnace under an atmosphere consisting of 0.1-15% hydrogen and remainder nitrogen with a specific dew point and temperature profile; applying a coating consisting of Ac3 and ≤1000° C. for a time sufficient to introduce a heat energy quantity >100,000-800,000 kJs; hot-forming the flat steel product to form the component; and cooling at least one section of the component at a cooling rate sufficient to generate hardening structures.

公开(公告)号：US20240131632A1

公开(公告)日：2024-04-25

申请号：US18277837

申请日：2022-02-28

Applicant: JFE STEEL CORPORATION

Inventor： Kazufumi WATANABE ,  Atsushi TAKADA ,  Akiyoshi ANDO ,  Takatoshi OKABE ,  Keiji UEDA

IPC: B23K35/30 ,  B23K9/167 ,  B23K35/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/38

CPC classification number: B23K35/3073 ,  B23K9/167 ,  B23K35/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/38

Abstract: A TIG welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the TIG welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.

公开(公告)号：US11965230B2

公开(公告)日：2024-04-23

申请号：US17201723

申请日：2021-03-15

Applicant: Nucor Corporation

Inventor： Weiping Sun

IPC: C22C38/16 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

CPC classification number: C22C38/16 ,  C21D8/0226 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/02 ,  C23C2/024 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A hot rolled, ultra-high strength, complex metallographic structured or multi-phase structured steel that improves formability during stamping or forming process, while possessing one or more of the following properties: excellent castability, rollability and coatability, excellent structural performance, excellent stretch formability, excellent stretch flangeability, excellent dent resistance, excellent durability, excellent impact performance, excellent intrusion and crash resistance without the purposeful addition of boron.

公开(公告)号：US20240127993A1

公开(公告)日：2024-04-18

申请号：US18091899

申请日：2022-12-30

Applicant: Baotou Jinshan Magnetic Material Co.,Ltd.

Inventor： Feng XIA ,  Yulong FU ,  Chen CHEN ,  Hailong ZHENG ,  Zichao WANG ,  Yonghong LIU ,  Caina SUN ,  Yu WANG

IPC: H01F1/057 ,  B22F1/05 ,  B22F3/16 ,  B22F9/02 ,  C22C33/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F41/02

CPC classification number: H01F1/057 ,  B22F1/05 ,  B22F3/16 ,  B22F9/023 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  H01F41/0253 ,  B22F2009/044

Abstract: Provided are an auxiliary alloy casting piece, a high-remanence and high-coercive force NdFeB permanent magnet, and preparation methods thereof. The method for preparing the auxiliary alloy casting piece includes the following steps: providing an auxiliary alloy material including, by mass percentage, 40% to 45% of Pr, 1% to 2% of Co, 0.5% to 1% of Ga, 0.6% to 0.8% of B, 0.1% to 0.2% of V, 0.3% to 0.7% of Ti, and a balance of Fe; smelting the auxiliary alloy material to obtain a smelted material; and subjecting the smelted material to a quick-setting casting to obtain the auxiliary alloy casting piece; where the quick-setting casting includes a refining and a casting in sequence.

公开(公告)号：US20240124963A1

公开(公告)日：2024-04-18

申请号：US18277966

申请日：2022-02-25

Applicant: NIPPON STEEL CORPORATION

Inventor： Satoshi HIRONAKA ,  Mai NAGANO ,  Yasuhiro ITO ,  Takuya TAKAYAMA

IPC: C22C38/60 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC classification number: C22C38/60 ,  C21D1/84 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/021 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C21D2211/005 ,  C23C2/285

Abstract: An objective of the present invention is to provide a steel sheet having a high strength which can provide excellent appearance quality. The steel sheet has a chemical composition including, in mass %, C: more than 0.030% to 0.145%, Si: 0% to 0.500%, Mn: 0.50% to 2.50%, P: 0% to 0.100%, S: 0% to 0.020%, Al: 0% to 1.000% or less, N: 0% to 0.0100%, and the like, wherein a metal micro-structures consisting of 70 to 95% of ferrite in volume fraction and 5 to 30% of hard phases in volume fraction, and a value X1 obtained by dividing a standard deviation of average Mn concentrations in a rolling direction at ¼ sheet-thickness positions in a sheet thickness direction by an average Mn concentration at the ¼ sheet-thickness positions is 0.025 or less.

公开(公告)号：US20240124949A1

公开(公告)日：2024-04-18

申请号：US18273370

申请日：2022-01-26

Applicant: JFE Steel Corporation

Inventor： Kenichiro Eguchi ,  Masao Yuga

IPC: C21D9/08 ,  C21D8/10 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/58 ,  C22C38/60

CPC classification number: C21D9/085 ,  C21D8/105 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/58 ,  C22C38/60 ,  C21D2211/001

Abstract: A high-strength stainless steel seamless pipe for oil country tubular goods has a composition that contains, in mass %, C: 0.012 to 0.05%, Si: 0.05 to 0.50%, Mn: 0.04 to 1.80%, P: 0.030% or less, S: 0.005% or less, Cr: 11.0 to 14.0%, Ni: 0.5 to 6.5%, Mo: 0.5 to 3.0%, Al: 0.005 to 0.10%, V: 0.005 to 0.20%, Co: 0.01 to 0.3%, N: 0.002 to 0.15%, O: 0.010% or less, and Ti: 0.001 to 0.20%, and in which Cr, Ni, Mo, Cu, C, Si, Mn, N, and Ti satisfy predetermined relations, and the balance is Fe and incidental impurities, the high-strength stainless steel seamless pipe having a steel microstructure with 6 to 20% retained austenite in terms of a volume percentage, a yield strength of 758 MPa or more, and an absorption energy vE−60 at −60° C. of 70 J or more.

公开(公告)号：US11959150B2

公开(公告)日：2024-04-16

申请号：US17470257

申请日：2021-09-09

Applicant: ArcelorMittal

Inventor： Emmanuel Dechassey ,  Christophe Silvy-Leligois ,  Francisco Chicharro Herranz ,  Vicente Polo Mestre ,  Marie-Christine Theyssier ,  Thierry Celotto ,  Christine Kaczynski ,  Thomas Dupuy ,  Quang-Tien Ngo

IPC: C21D9/46 ,  B21B15/00 ,  B23K11/00 ,  B23K11/04 ,  B23K26/20 ,  C21D8/02 ,  C21D9/50 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23G1/00 ,  B23K103/04

CPC classification number: C21D9/46 ,  B21B15/0085 ,  B23K11/0073 ,  B23K11/04 ,  B23K26/206 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/50 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23G1/00 ,  B23K2103/04 ,  C21D2211/008

Abstract: A steel sheet that is welded and then cold rolled to a thickness between 0.5 mm and 3 mm, the deformation ratio created by cold rolling in the base metal is equal to εMB, for which the deformation ratio created by the cold rolling in the welded joint is equal to εS, where:




0.4
≤

ɛS

ɛ
⁢
M
⁢
B

公开(公告)号：US20240117475A1

公开(公告)日：2024-04-11

申请号：US18274960

申请日：2022-03-14

Applicant: NIPPON STEEL CORPORATION

Inventor： Takuya MITSUNOBU ,  Masaaki URANAKA ,  Keitaro MATSUDA ,  Hiroshi TAKEBAYASHI ,  Jun MAKI

IPC: C22C38/06 ,  C22C38/02 ,  C22C38/04 ,  C23C2/06

CPC classification number: C22C38/06 ,  C22C38/02 ,  C22C38/04 ,  C23C2/06

Abstract: High strength steel sheet and plated steel sheet having high plateability, LME resistance, and hydrogen embrittlement resistance, that is, steel sheet containing C: 0.05 to 0.40%, Si: 0.2 to 3.0%, Mn: 0.1 to 5.0%, and sol. Al: 0.4 to 1.50%, having an internal oxidation layer including fine granular oxides and coarse granular oxides in a surface layer of the steel sheet, a number density of fine granular oxides in the internal oxidation layer being 4.0/μm2 or more, a number density of coarse granular oxides in the internal oxidation layer being 4.0/25 μm2 or more and 30.0/25 μm2 or less, and including a surface depleted layer with a steel composition not including oxides which satisfies, by mass %, Si≤0.6% and Al≥0.05% at a depth of ½ of the average depth of the internal oxidation layer calculated from the cross-sectional SEM image of the steel sheet, and a plated steel sheet using the same.

公开(公告)号：US11952640B2

公开(公告)日：2024-04-09

申请号：US18111381

申请日：2023-02-17

Applicant: DAIDO STEEL CO., LTD.

Inventor： Naoki Umemori ,  Toshifumi Nemoto

IPC: C21D9/00 ,  C21D1/18 ,  C21D6/00 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52

CPC classification number: C21D9/00 ,  C21D1/18 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52

Abstract: The present invention relates to a steel for a mold including: on % by mass basis, 0.55%≤C≤0.70%; 0.30%≤Si≤0.60%; 0.55%≤Mn≤1.2%; 5.7%≤Cr≤6.9%; 1.2%≤Mo+W/2≤1.6%; 0.55%≤V≤0.79%; and 0.005%≤N≤0.1%, with the remainder being Fe and inevitable impurities including, Al≤0.020%, Ni≤0.20%, S≤0.0015%, and Cu≤0.10%, and satisfying P1≥24 and 4.9≤P2≤7.3, P1 and P2 being a value obtained based on the following formula (1) and (2), respectively, P1=45−13.6[Si]−7.0([Mo]+[W]/2)−12.9[Ni] (1), P2=7.4[V]+15.8[N]+38.6[Al] (2) in which [M] represents a content of an element M in % by mass basis, and relates to a mold including the steel for a mold.