公开(公告)号：US11788177B2

公开(公告)日：2023-10-17

申请号：US17241154

申请日：2021-04-27

申请人： GENERAL ELECTRIC COMPANY

发明人： Theodore Francis Majka

IPC分类号： C21D6/04 ,  C22C38/18 ,  C21D6/02 ,  C22C38/60 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52

CPC分类号： C22C38/60 ,  C22C38/001 ,  C22C38/002 ,  C22C38/007 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52

摘要： A precipitation-hardened stainless steel alloy is disclosed including, by weight: 14.0-16.0% Cr; 6.0-7.0% Ni; 1.25-1.75% Cu; 0.5-1.0% Mo; 0.40-0.85% Nb; 0.025-0.05% C; up to 1.0% Mn; up to 1.0% Si; up to 0.1% V; up to 0.1% Co; up to 0.1% Sn; up to 0.02% N; up to 0.025% P; up to 0.05% Al; up to 0.008% S; up to 0.005% Ag; up to 0.005% Pb; up to 0.1% As; up to 0.01% Sb; and a balance of Fe. The alloy has a ratio of Nb:(C+N) of at least 15:1.

公开(公告)号：US20230265538A1

公开(公告)日：2023-08-24

申请号：US18115528

申请日：2023-02-28

申请人： Hyundai Steel Company

发明人： Nu Ri Shin ,  Hun Chul Kang ,  Ji Hee Son ,  Byoung Hoon Kim

IPC分类号： C21D9/46 ,  B21B1/26 ,  C21D8/02 ,  C21D6/00 ,  C22C38/32 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/02

CPC分类号： C21D9/46 ,  B21B1/26 ,  C21D6/002 ,  C21D6/02 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C22C38/02 ,  C22C38/002 ,  C22C38/04 ,  C22C38/32 ,  B21D22/022

摘要： Provided are a material for hot stamping, and the material includes: a steel sheet including carbon (C) in an amount of 0.28 wt% to 0.50 wt%, silicon (Si) in an amount of 0.15 wt% to 0.70 wt%, manganese (Mn) in an amount of 0.5 wt% to 2.0 wt%, phosphorus (P) in an amount less than or equal to 0.05 wt%, sulfur (S) in an amount less than or equal to 0.01 wt%, chromium (Cr) in an amount of 0.1 wt% to 0.5 wt%, boron (B) in an amount of 0.001 wt% to 0.005 wt%, an additive in an amount less than or equal to 0.1 wt%, balance iron (Fe), and other inevitable impurities; and fine precipitates distributed within the steel sheet. The additive includes at least one of titanium (Ti), niobium (Nb), and vanadium (V), and the fine precipitates include nitride or carbide of at least one of titanium (Ti), niobium (Nb), and vanadium (V) and trap hydrogen.

公开(公告)号：US11692232B2

公开(公告)日：2023-07-04

申请号：US16555102

申请日：2019-11-25

申请人： Gregory Vartanov

发明人： Gregory Vartanov

IPC分类号： C21D6/02 ,  C21D6/00 ,  C22C38/50 ,  C22C38/46 ,  C22C38/44 ,  C22C38/30 ,  C21D1/22 ,  B22F3/15 ,  B22F3/24 ,  B33Y70/00 ,  B22F9/08 ,  B22F1/142 ,  B22F10/20 ,  B22F10/64 ,  B22F10/66

CPC分类号： C21D1/22 ,  B22F1/142 ,  B22F3/15 ,  B22F3/24 ,  B22F9/082 ,  B22F10/20 ,  B22F10/64 ,  B22F10/66 ,  B33Y70/00 ,  C21D6/004 ,  C21D6/02 ,  C22C38/30 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  B22F2301/35 ,  C21D2211/001 ,  C21D2211/008 ,  B22F2998/10 ,  B22F9/08 ,  B22F10/20 ,  B22F10/66 ,  B22F2003/247 ,  B22F2003/248

摘要： High strength precipitation hardening stainless steel alloy is disclosed. The steel alloy has a composition by weight %, about: 30.0% max nickel (Ni), 0.0 to 15.0% cobalt (Co), 25.0% max chromium (Cr), 5.0% max molybdenum (Mo), 5.0% max titanium (Ti), 5.0% max vanadium (V), about 0.5% max lanthanum (La) and/or cerium (Ce), and in balance iron (Fe) and inevitable impurities. The steel alloy provides a unique combination of corrosion resistance, strength and toughness and is a material for aircraft landing gears and structures.

公开(公告)号：US20230142397A1

公开(公告)日：2023-05-11

申请号：US17897257

申请日：2022-08-29

申请人： University of Science and Technology Beijing

发明人： Qing LIU ,  Leilei ZOU ,  Jiangshan ZHANG ,  Huisheng WANG ,  Biao TAO

IPC分类号： B22D11/22 ,  B22D11/00 ,  C21D6/02

CPC分类号： B22D11/225 ,  B22D11/001 ,  C21D6/02

摘要： A secondary cooling control method for reinforcing surface solidification structure of microalloyed steel continuous casting bloom includes: in situ observing precipitation behavior of secondary phase particles of the microalloyed steel, and determining a concentrated precipitation temperature range; cooling the microalloyed steel at different cooling rates, obtaining a particle size and a volume fraction of the secondary phase particles of the microalloyed steel at different cooling rates; determining an optimal average cooling rate; determining an optimal average cooling rate r; determining an optimal average cooling rate; and determining an optimal average cooling rate range through intersection of the three optimal average cooling rates whereby the continuous casting secondary cooling is optimized. The present invention can enhance the surface solidification structure of continuous casting bloom and reduce surface and subsurface cracks of the microalloyed steel continuous casting bloom.

公开(公告)号：US20220195547A1

公开(公告)日：2022-06-23

申请号：US17568835

申请日：2022-01-05

申请人： NORTHWESTERN UNIVERSITY

发明人： Nicholas J. Wengrenovich ,  Gregory B. Olson

IPC分类号： C21D6/02 ,  C21D7/13 ,  C21D6/00 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54

摘要： An optimized Gamma-prime (γ′) strengthened austenitic transformation induced plasticity (TRIP) steel comprises a composition designed and processed such that the optimized γ′ strengthened austenitic TRIP steel meets property objectives comprising a yield strength of 896 MPa (130 ksi), and an austenite stability designed to have Msσ(sh)=−40° C., wherein Msσ(sh) is a temperature for shear, and wherein the property objectives are design specifications of the optimized γ′ strengthened austenitic TRIP steel. The optimized γ′ strengthened austenitic TRIP steel is Blastalloy TRIP 130.

公开(公告)号：US11345985B2

公开(公告)日：2022-05-31

申请号：US16511498

申请日：2019-07-15

申请人： POSCO

发明人： Yeon-Sang Ahn ,  Chang-Hyo Seo ,  Kang-Hyun Choi

IPC分类号： C21D6/02 ,  C22C38/60 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  B32B15/01

摘要： Provided is a high-strength steel sheet including, in % weight, carbon (C): 0.04 to 0.15%, silicon (Si): 0.01 to 1.0%, manganese (Mn): 1.8 to 2.5%, molybdenum (Mo): 0.15% or less (excluding 0%), chromium (Cr): 1.0% or less (excluding 0%), phosphorus (P): 0.1% or less, sulfur (S): 0.01% or less, aluminum (Al): 0.01 to 0.5%, nitrogen (N): 0.01% or less, boron (B): 0.01% or less (excluding 0%), antimony (Sb): 0.05% or less (excluding 0%), one or more of titanium (Ti): 0.003 to 0.06% and niobium (Nb): 0.003 to 0.06%, a balance of Fe and other unavoidable impurities, and contents of the C, the Si, the Al, the Mo and the Cr satisfy the following Expression 1: Expression 1: {(2×(Si+Al))+Mo+Cr}/C≥15. The high-strength steel sheet comprises: a ferrite phase, a bainite phase, a martensite phase, and a residual austenite phase, the ferrite phase being less than 40% of area fraction in the microstructure.

公开(公告)号：US11198930B2

公开(公告)日：2021-12-14

申请号：US15509879

申请日：2015-09-15

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Masayoshi Sawada ,  Yuichi Fukumura

IPC分类号： C22C38/50 ,  C22C38/00 ,  C22C38/58 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52 ,  C22C38/54 ,  C21D8/02 ,  C21D9/46 ,  C21D6/02 ,  C21D6/00

摘要： There is provided a precipitation-strengthened stainless steel plate having a chemical composition: by mass %, C: 0.01 to 0.10%; Si: 0.02 to 3.0%; Mn: 0.02 to 2.0%; Ni: 20 to 30%, Cr: 14 to 25.0%; Mo: 1.0 to 4.0%; Cu: 0.01 to 2.0%; Co: 0.01 to 0.5%; V: 0.1 to 1.0%; B: 0.001 to 0.01%; N: 0.02% or less; Ti: 2.0 to 5.0%; Al: 0.002 to 5.0%; Ti+Al: 3.3 to 6.0%; and the balance being Fe and impurities, the precipitation-strengthened stainless steel plate having a Vickers hardness Hv of 300 or higher, wherein the number density γ′: Ni3(Al, Ti), which is an intermetallic compound, is 0 to 5/μm2. As a heat resistant component material, the precipitation-strengthened stainless steel plate is less expensive than conventional Ni-based alloys such as NCF625 and NCF718, and more excellent in high temperature properties than a precipitation-strengthened heat-resistant stainless steel such as SUH660.

公开(公告)号：US20210340641A1

公开(公告)日：2021-11-04

申请号：US17271663

申请日：2019-08-22

申请人： JFE Steel Corporation

发明人： Yoshihiko Ono ,  Yuma Honda ,  Shimpei Yoshioka ,  Koichi Taniguchi ,  Nobuyuki Nakamura ,  Takeshi Murai

IPC分类号： C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C21D6/02 ,  C22C38/58 ,  C22C38/60 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/42 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/06 ,  C23C2/06 ,  C23C2/40 ,  C23C2/02

摘要： A high-strength steel sheet of the present invention has a specific chemical composition. Furthermore, in the steel sheet, a degree of Mn segregation in a specific region is 1.5 or less; a maximum P concentration in a specific region is 0.08 mass % or less; in a specific region, the number of specific MnS particle groups is 2.0 or fewer per 1 mm2, and the number of specific oxide-based inclusions is 8 or fewer per 1 mm2; of all of the oxide-based inclusions, oxide-based inclusions having a specified composition are present in a number ratio of 80% or greater; the microstructure includes, in terms of a volume fraction, 30 to 95% martensite and bainite in total, 5 to 70% ferrite phase, and less than 3% (and 0% or greater) austenite phase; and a tensile strength is 980 MPa or greater.

公开(公告)号：US11085108B2

公开(公告)日：2021-08-10

申请号：US16314240

申请日：2017-06-07

申请人： Uddeholms AB

发明人： Petter Damm ,  Lena Rahlen ,  Amanda Forsberg ,  Victoria Bergqvist ,  Riccardo Zanchetta

IPC分类号： C22C38/02 ,  C22C38/58 ,  C22C38/44 ,  C22C38/04 ,  C22C38/06 ,  C22C38/46 ,  C21D6/02 ,  C21D6/00

摘要： The invention relates to a steel for a tool holder. The steel comprises the following main components (in wt. %): C 0.07-0.13 Si 0.10-0.45 Mn 1.5-3.1 Cr 2.4-3.6 Ni 0.5-2.0 Mo 0.1-0.7 Al 0.001-0.06 S≤0.003 The steel has a bainitic microstructure comprising up to 20 volume % retained austenite and up to 20 volume % martensite.

公开(公告)号：US11059269B2

公开(公告)日：2021-07-13

申请号：US16466459

申请日：2017-12-19

申请人： POSCO

发明人： Jin-You Kim

IPC分类号： B32B15/01 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C23C2/40 ,  C23C2/02 ,  C22C38/12 ,  C22C38/22 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C22C38/16 ,  C23C30/00 ,  C23C28/02 ,  C22C38/26 ,  C22C38/20 ,  B32B15/04 ,  C22C38/08 ,  C22C38/40 ,  C23C28/00 ,  C22C38/18 ,  C22C38/24 ,  B32B15/18 ,  C21D6/02

摘要： Disclosed are a hot dip coated steel and a method for manufacturing the same, the hot dip coated steel comprising a hot rolled steel and a hot dip coated layer formed on the surface of the hot rolled steel, wherein the hot rolled steel comprises: by wt %, 0.05-0.15% of C, 0.5% or less of Si (excluding 0%), 0.5-1.5% of Mn, 0.01-0.05% of Nb, 0.005-0.05% of V, 0.03% or less of P (excluding 0%), 0.015% of S or less (excluding 0%), 0.05% or less of Al (excluding 0%), 0.01% or less of N (excluding 0%), and the balance of Fe and inevitable impurities; 90 area % or more of ferrite as the microstructure thereof; and 5,000-15,000/μm2 of V-based precipitates.