公开(公告)号：US20230220532A1

公开(公告)日：2023-07-13

申请号：US18180318

申请日：2023-03-08

申请人： Caterpillar Inc.

发明人： Michael A. PERSHING ,  Curtis A. HENNING ,  Robert J. PICKERILL ,  Scott A. JOHNSTON

IPC分类号： C23C8/22 ,  C22C38/44 ,  C21D9/46 ,  C22C38/04 ,  C22C38/02 ,  C22C38/48

CPC分类号： C23C8/22 ,  C22C38/44 ,  C21D9/46 ,  C22C38/04 ,  C22C38/02 ,  C22C38/48 ,  C21D2211/001 ,  C21D2211/008 ,  C22C2204/00

摘要： A carburized steel component, comprising a steel base including, by weight percent, from 0.08% to 0.35% carbon, 0.5% to 1.3% manganese, 0% to 0.35% silicon, 0.2% to 2.0% chromium, 0% to 4% nickel, 0% to 0.50% molybdenum, 0% to 0.06% niobium, and a remaining weight percent of iron, and a carburized layer of above 0.35% by weight carbon from a surface of the carburized layer to a carburized layer depth, wherein the carburized layer depth is from 0.5 mm to 3.0 mm, wherein the carburized layer comprises a microstructure including martensite, retained austenite, carbide, and less than 2% by volume non-martensitic transformation products (NMTP), and wherein the carburized layer includes a prior austenite average grain size of 3.0-8.0 microns from the surface to a depth of at least 0.2 mm.

公开(公告)号：US20230212720A1

公开(公告)日：2023-07-06

申请号：US17566044

申请日：2021-12-30

申请人： Cleveland-Cliffs Steel Properties Inc.

发明人： Jerry W. Schoen

IPC分类号： C22C38/34 ,  C21D8/12 ,  C21D6/00 ,  C22C38/20 ,  C22C38/04 ,  C22C38/00

CPC分类号： C22C38/34 ,  C21D8/1255 ,  C21D8/1233 ,  C21D8/1283 ,  C21D6/008 ,  C22C38/20 ,  C22C38/04 ,  C22C38/002 ,  C21D2211/001

摘要： A high permeability grain oriented electrical steel having a chemistry comprising, all in weight percent, 2.5% to 4.5% silicon, 0.02% to 0.08% carbon, 0.01 to 0.05% aluminum, 0.005% to 0.050% sulfur or selenium, 0.02 to 0.20% manganese, 0.05 to 0.20% tin, 0.05 to 1% copper, 0.5% to 2.0% chromium, up to 0.10% phosphorus and up to 0.20% antimony with the balance being essentially iron and residual elements. The steel contains chromium and phosphorus in such amounts that a Cr:(P+0.25Sb) ratio is below 80:1 or, below 50:1, or below 30:1 which provides highly stable magnetic properties in the finished steel sheet. A hot processed band comprised of such steel is annealed and rapidly cooled after such annealing at a rate of at least 50° C. per second from 875-950° C. to a temperature below 400° C. prior to cold rolling to final thickness. Such steel forming a hot processed band having a thickness of from 1.5 to 4.0 mm and having a volume resistivity of at least 50 μΩ-cm, an austenite volume fraction (γ1150° C.) of at least 20%, and an isomorphic layer thickness of at least 2% of the total thickness on at least one surface of the hot processed band.

公开(公告)号：US20230203617A1

公开(公告)日：2023-06-29

申请号：US18177109

申请日：2023-03-01

申请人： ArcelorMittal

发明人： Martin BEAUVAIS ,  Alice DUMONT ,  Alexandre GIBOT ,  Astrid PERLADE ,  Kangying ZHU

IPC分类号： C21D9/50 ,  B32B15/01 ,  C21D6/00 ,  C21D8/04 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC分类号： C21D9/50 ,  B32B15/013 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0405 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  B32B2605/00 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008

摘要： A steel sheet for the manufacture of a press hardened part is provided, having a composition of: 0.15%≤C≤0.22%, 3.5%≤Mn

公开(公告)号：US11680331B2

公开(公告)日：2023-06-20

申请号：US16754011

申请日：2018-10-19

申请人： ArcelorMittal

发明人： Anirban Chakraborty ,  Pascal Bertho ,  Hassan Ghassemi-Armaki ,  Christian Allely ,  Tiago Machado Amorim

IPC分类号： C25D3/22 ,  B32B15/01 ,  B32B7/05 ,  B23K11/11 ,  C21D6/00 ,  C21D9/46 ,  C22C18/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/38 ,  C23F17/00

CPC分类号： C25D3/22 ,  B23K11/11 ,  B32B7/05 ,  B32B15/012 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/46 ,  C22C18/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/38 ,  C23F17/00 ,  B32B2250/02 ,  B32B2605/08 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

摘要： A steel sheet coated with a coating comprising from 10 to 40% of nickel, the balance being zinc, such steel sheet having a microstructure comprising from 1 to 50% of residual austenite, from 1 to 60% of martensite and optionally at least one element chosen from: bainite, ferrite, cementite and pearlite, and the following chemical composition in weight: 0.10

公开(公告)号：US11680301B2

公开(公告)日：2023-06-20

申请号：US17345180

申请日：2021-06-11

申请人： The Boeing Company ,  Institute of Metal Research

发明人： Jialong Tian ,  Ke Yang ,  Wei Wang ,  Yiyin Shan ,  Wei Yan

IPC分类号： C21D7/13 ,  C21D6/00 ,  C22C38/52 ,  C22C38/44 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/50

CPC分类号： C21D7/13 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/50 ,  C22C38/52 ,  C21D2211/001 ,  C21D2211/008

摘要： An ultra-high strength maraging stainless steel with nominal composition (in mass) of C≤0.03%, Cr: 13.0-14.0%, Ni: 5.5-7.0%, Co: 5.5-7.5%, Mo: 3.0-5.0%, Ti: 1.9-2.5%, Si: ≤0.1%, Mn: ≤0.1%, P: ≤0.01%, S: ≤0.01%, and Fe: balance. The developed ultra-high strength maraging stainless steel combines ultra-high strength (with σb≥2000 MPa, σ0.2≥1700 MPa, δ≥8% and ψ≥40%), high toughness (KIC≥83 MPa·m½) and superior salt-water corrosion resistance (with pitting potential Epit≥0.15 (vs SCE)). Therefore, this steel is suitable to make structural parts that are used in harsh corrosive environments like marine environment containing chloride ions, etc.

公开(公告)号：US20230183833A1

公开(公告)日：2023-06-15

申请号：US17923468

申请日：2021-06-03

申请人： NIPPON STEEL CORPORATION

发明人： Kengo TAKEDA ,  Katsuya NAKANO ,  Yuya SUZUKI ,  Eriko TSUKAMOTO

IPC分类号： C21D9/46 ,  C21D8/02 ,  B21C47/02 ,  C23G1/08 ,  C23C2/06 ,  C23C2/12 ,  C23C2/40 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

CPC分类号： C21D9/46 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  B21C47/02 ,  C23G1/08 ,  C23C2/06 ,  C23C2/12 ,  C23C2/40 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C21D2211/005 ,  C21D2211/009 ,  C21D2211/002 ,  C21D2211/008 ,  C21D2211/001

摘要： Provided is a steel sheet having a predetermined chemical composition, wherein precipitates having a diameter of less than 0.1 μm are present in a number density of 10 to 200/μm2 in a depth region of 1 to 10 μm from a surface, an amount of dissolved C in a depth region of 10 to 60 μm from the surface is less than 0.20 mass %, and a tensile strength is 1200 MPa or more. Further, provided is a method for producing a steel sheet comprising a step of hot rolling a steel slab having a predetermined chemical composition, then coiling it at 580° C. or less, a step of pickling the hot rolled steel sheet to remove oxide scale and remove the surface layer of the hot rolled steel sheet down to at least 5 μm, and a step of cold rolling the hot rolled steel sheet, then holding it in an atmosphere of a dew point of −20 to 20° C. at a temperature region of 200 to 400° C. for 20 to 180 seconds and holding it at a temperature region of 740 to 900° C. for 40 to 300 seconds.

公开(公告)号：US20230183829A1

公开(公告)日：2023-06-15

申请号：US17925410

申请日：2021-05-12

申请人： JFE Steel Corporation

发明人： Shunsuke Sasaki ,  Masao Yuga ,  Tatsuro Katsumura ,  Hideo Kijima

IPC分类号： C21D8/10 ,  C22C38/60 ,  C21D6/00

CPC分类号： C21D8/105 ,  C22C38/60 ,  C21D6/004 ,  C21D2211/001

摘要： An alloy pipe and a method for producing the same are disclosed. The alloy pipe of the present invention contains, as a component composition, in terms of % by mass, Cr: 11.5-35.0%, Ni: 23.0-60.0%, and Mo: 0.5-17.0%, has an austenitic phase as a microstructure, has a Mo concentration (% by mass) in a grain boundary of the austenitic phase that is 4.0 times or less than a Mo concentration (% by mass) within grains of the austenitic phase, and has a tensile yield strength in a pipe axial direction of 689 MPa or more and a ratio (compressive yield strength in a pipe axial direction)/(tensile yield strength in a pipe axial direction) of 0.85 to 1.15.

公开(公告)号：US20230175104A1

公开(公告)日：2023-06-08

申请号：US18016396

申请日：2021-07-12

申请人： ArcelorMittal

发明人： Astrid PERLADE ,  Kangying ZHU ,  Frédéric KEGEL ,  Blandine REMY

IPC分类号： C22C38/04 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00

CPC分类号： C22C38/04 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/02 ,  C22C38/002 ,  C22C38/001 ,  C21D9/46 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0263 ,  C21D6/008 ,  C21D6/005 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C21D8/0226 ,  B23K11/11

摘要： A cold rolled and annealed steel sheet, made of a steel having a composition including, by weight percent



C: 0.03-0.18%
Mn: 6.0-11.0%
Al: 0.2-3%
Mo: 0.05-0.5%
B: 0.0005-0.005%
S≤0.010%
P≤0.020%
N≤0.008%
and including optionally one or more of the following elements, in weight percentage:
Si≤1.20%
Ti≤0.050%
Nb≤0.050%
Cr≤0.5%
V≤0.2%
the remainder of the composition being iron and unavoidable impurities resulting from the smelting, the steel sheet having a microstructure including, in surface fraction,

from 30% to 55% of retained austenite,
from 45% to 70% of ferrite,
less than 5% of fresh martensite
a carbon [C]A and manganese [Mn]A content in austenite, expressed in weight percent, satisfying








[C]A*[Mn]A/((0.1+C %2)*(Mn %+2))≥1.10





and an inhomogeneous repartition of manganese characterized by a manganese distribution with a slope above or equal to −30.

公开(公告)号：US20230175089A1

公开(公告)日：2023-06-08

申请号：US18061782

申请日：2022-12-05

申请人： Soenen Technology NV

发明人： Luc DE SUTTER

IPC分类号： C21D9/00 ,  C21D8/00 ,  C21D1/773 ,  C21D1/18 ,  C21D1/42 ,  C22C38/24 ,  C22C38/22 ,  C22C38/02 ,  C22C38/04 ,  B23F1/06

CPC分类号： C21D9/0068 ,  B23F1/06 ,  C21D1/18 ,  C21D1/42 ,  C21D1/773 ,  C21D8/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C21D2211/001

摘要： The present invention relates to a method of hardening slides of a perforating press comprising providing a steel beam; hardening of the steel beam in a vacuum furnace; tempering the steel beam twice; first straightening of the steel beam at a temperature of 20° C. ± 10° C.; milling of an at least partially continuous sawtooth profile, along a longitudinal direction of the steel beam, on a first side of the steel beam; wherein, after milling the at least partially continuous sawtooth profile on the first side of the steel beam, a second side of the steel beam, lying opposite the first side, is hardened by means of induction currents, after which the steel beam is again tempered twice and after which the steel beam is straightened a second time at a temperature of 20° C. ± 10° C. The invention also relates to a slide for a perforating press hardened according to the method.

公开(公告)号：US11655517B2

公开(公告)日：2023-05-23

申请号：US16761953

申请日：2018-09-17

申请人： POSCO CO., LTD

发明人： Joo-Hyun Ryu ,  Kyoo-Young Lee ,  Sea-Woong Lee

IPC分类号： C23C2/06 ,  C23C2/40 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B32B15/01 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C23C2/28 ,  C22C38/26 ,  C22C38/28 ,  C23C30/00 ,  B32B15/04 ,  B32B15/18 ,  C22C38/18 ,  C22C38/24 ,  C23C28/02 ,  C22C38/42 ,  C23C2/26 ,  C22C38/50 ,  C22C38/20 ,  C22C38/46 ,  C22C38/38 ,  C22C38/44 ,  C22C38/22 ,  C22C38/40 ,  C23C2/12 ,  C23C28/00 ,  C22C38/48

CPC分类号： C21D9/46 ,  B32B15/01 ,  B32B15/012 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C28/021 ,  C23C28/023 ,  C23C28/025 ,  C23C28/3225 ,  C23C30/00 ,  C23C30/005 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/008 ,  Y02P10/20 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/26

摘要： The present invention relates to an automotive steel sheet and, more specifically, provides: an ultrahigh-strength and high-ductility steel sheet ensuring ultrahigh strength and high ductility and, simultaneously, having excellent cold formability due to a high yield strength ratio, and improved collision characteristics.