公开(公告)号：US20230265538A1

公开(公告)日：2023-08-24

申请号：US18115528

申请日：2023-02-28

Applicant: Hyundai Steel Company

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

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

CPC classification number: 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

Abstract: 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

Applicant: Gregory Vartanov

Inventor： Gregory Vartanov

IPC: 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 classification number: 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

Abstract: 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

Applicant: University of Science and Technology Beijing

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

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

CPC classification number: B22D11/225 ,  B22D11/001 ,  C21D6/02

Abstract: 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：US20190201972A1

公开(公告)日：2019-07-04

申请号：US16304578

申请日：2017-05-25

Applicant: NUOVO PIGNONE TECNOLOGIE SRL

Inventor： Filippo CAPPUCCINI ,  Massimo GIANNOZZI ,  Massimiliano BUCCIONI ,  Domenico DI PIETRO

IPC: B22F1/00 ,  B22F9/08 ,  B22F5/00 ,  C22C30/02 ,  C21D6/00 ,  F01D5/28

CPC classification number: B22F1/0085 ,  B22F3/04 ,  B22F3/10 ,  B22F3/15 ,  B22F3/225 ,  B22F5/009 ,  B22F9/082 ,  B22F2301/35 ,  B22F2998/10 ,  B22F2999/00 ,  C21D1/18 ,  C21D6/004 ,  C21D6/02 ,  C22C19/055 ,  C22C19/056 ,  C22C30/00 ,  C22C30/02 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  F01D5/28 ,  F04D29/02 ,  F05D2300/17 ,  C22C38/00 ,  B22F3/02

Abstract: Turbomachines, as well as their components, are disclosed being in the field of production and treatment of oil and gas containing e.g. hydrocarbon plus hydrogen sulfide, carbon dioxide, with or without other contaminants. The components are made of a high corrosion high temperature resistant alloy, capable of resisting to corrosion and/or stress at high temperature better than state of art martensitic stainless steels and behaving similarly to premium nickel base superalloys, and at the same time showing a very improved hardness value.

公开(公告)号：US20180363080A1

公开(公告)日：2018-12-20

申请号：US15781704

申请日：2016-09-29

Applicant: HITACHI METALS, LTD.

Inventor： Shiho FUKUMOTO

IPC: C21D8/00 ,  C22C38/30 ,  C22C38/24 ,  C22C38/22 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/00

CPC classification number: C21D8/005 ,  C21D6/002 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D6/02 ,  C21D9/22 ,  C21D9/24 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/30

Abstract: Provided are a high-speed tool steel having excellent hot workability, and excellent damage resistance when made into various tools; a material for tools, and a method for producing the same. The high-speed tool steel contains, in mass %, 0.9-1.2% of C, 0.1-1.0% of Si, 1.0% or less of Mn, 3.0-5.0% of Cr, 2.1-3.5% of W, 9.0-10.0% of Mo, 0.9-1.2% of V, 5.0-10.0% of Co, 0.020% or less of N, and the remainder being Fe and impurities, wherein an M value calculated by a formula satisfies −1.5≤M value≤1.5. Formula: M value=−9.500+9.334[% C]−0.275[% Si]−0.566[% W]−0.404[% Mo]+3.980[% V]+0.166[% Co], where the characters in brackets [ ] indicate the contained amounts (mass %) of the respective elements. The present invention also pertains to: a material for tools, which is obtained by using the high-speed tool steel; and a method for producing the material for tools.

公开(公告)号：US20180259408A1

公开(公告)日：2018-09-13

申请号：US15904931

申请日：2018-02-26

Applicant: Seiko Instruments Inc.

Inventor： Takuma OTOMO ,  Yasunori AKASAKA ,  Ryo SUGAWARA ,  Tomoo KOBAYASHI

IPC: G01L9/00 ,  C22C38/44 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC classification number: G01L9/0044 ,  C21D6/004 ,  C21D6/02 ,  C21D2201/05 ,  C21D2211/001 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  G01L19/0627 ,  G01L19/0672

Abstract: An object of the present invention is to provide a metal elastic element which is suitable for sensing or the like of a fluid pressure change and exhibits favorable resilience even in the case of receiving a sudden pressure change, and also provide a diaphragm using the same. A metal elastic element of the present invention is composed of a two-phase stainless steel having a γ-phase and an α-phase, wherein the area ratio of the γ-phase is 40% or less, and the two-phase structure is a marble-like metal structure. In the invention, it is preferred that the element has a fiber texture in which γ and α are preferentially oriented parallel to the thickness direction.

公开(公告)号：US10071416B2

公开(公告)日：2018-09-11

申请号：US12709133

申请日：2010-02-19

Applicant: James Geoffrey Williams ,  Harold Roland Kaul ,  Daniel Geoffrey Edelman ,  Christopher Ronald Killmore

Inventor： James Geoffrey Williams ,  Harold Roland Kaul ,  Daniel Geoffrey Edelman ,  Christopher Ronald Killmore

IPC: B22D11/00 ,  B22D11/06 ,  B22D11/117 ,  C21D6/02 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12

CPC classification number: B22D11/001 ,  B22D11/0622 ,  B22D11/117 ,  C21D6/02 ,  C21D8/0215 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12

Abstract: A steel product or thin steel cast strip including, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, less than 0.01% aluminum, and at least one of niobium between 0.01% and 0.20% and vanadium between 0.01% and 0.20%, and a microstructure of a majority bainite and acicular ferrite, and more than 70% niobium and/or vanadium in solid solution. The steel product may have an increase in elongation and an increase in yield strength after age hardening. The age hardened steel product may have niobium carbonitride particles with an average particle size of 10 nanometers and less, and may have substantially no niobium carbonitride particles greater than 50 nanometers. The steel product may have a yield strength of at least 380 MPa, a tensile strength of at least 410 MPa, or both. The product may have a total elongation of at least 6% or 10%.

公开(公告)号：US20180251868A1

公开(公告)日：2018-09-06

申请号：US15483559

申请日：2017-04-10

Applicant: NORTHWESTERN UNIVERSITY

Inventor： Nicholas J. Wengrenovich ,  Gregory B. Olson

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

CPC classification number: C21D6/02 ,  C21D6/004 ,  C21D7/13 ,  C21D2211/001 ,  C21D2211/004 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54

Abstract: 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：US20180147636A1

公开(公告)日：2018-05-31

申请号：US15579626

申请日：2016-06-21

Applicant: HITACHI METALS, LTD.

Inventor： Shiho FUKUMOTO ,  Taishiroh FUKUMARU

IPC: B23B27/14 ,  B23C5/16 ,  C21D9/22 ,  C21D8/06 ,  C21D6/00 ,  C21D1/18 ,  C21D6/02 ,  C22C38/22 ,  C22C38/24 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/30 ,  C21D1/26

CPC classification number: B23B27/148 ,  B23B27/14 ,  B23B51/00 ,  B23C5/16 ,  C21D1/18 ,  C21D1/26 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D6/02 ,  C21D8/00 ,  C21D8/06 ,  C21D8/065 ,  C21D9/22 ,  C21D9/24 ,  C21D2211/001 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/30 ,  C22C38/36

Abstract: Provided are: a method for producing a high-speed tool steel material capable of increasing carbides in the structure of a high-speed tool steel product; a method for producing a high-speed tool steel product; and a high-speed tool steel product. The method for producing a high-speed tool steel material is provided with: a casting step for casting molten steel to obtain a steel ingot; a blooming step for heating the steel ingot obtained in said casting step to a temperature higher than 1120° C. and thereafter hot-working same to obtain an intermediate material; and a finishing step for heating the intermediate material obtained in the blooming step to a temperature of 900-1120° C. and thereafter hot-working same to obtain the high-speed tool steel material. Further, said method for producing a high-speed tool steel material is provided with an annealing step for annealing the high-speed tool steel material obtained in said finishing step. The present invention is also: a method for producing a high-speed tool steel product, wherein quenching and annealing is performed on the high-speed tool steel material obtained in the production method above; and a high-speed tool steel product.

公开(公告)号：US09963757B2

公开(公告)日：2018-05-08

申请号：US15026261

申请日：2014-11-19

Applicant: Dow Global Technologies LLC

Inventor： Valentina A. Woodcraft ,  Eugene L. Liening

IPC: C21D9/00 ,  C21D1/74 ,  C21D6/02 ,  C21D6/04 ,  C21D1/26 ,  C21D1/613 ,  C22F1/02 ,  C22F1/18

CPC classification number: C21D9/0068 ,  C21D1/26 ,  C21D1/613 ,  C21D1/74 ,  C21D6/02 ,  C21D6/04 ,  C22F1/02 ,  C22F1/18

Abstract: A process includes: (a) providing a tantalum-coated metal alloy substrate; (b) heat annealing the tantalum-coated metal alloy substrate by heating to an annealing temperature for the tantalum-coated metal alloy substrate, holding at the annealing temperature for a period of time and then quenching to a temperature below 50 degrees Celsius; (c) heating the tantalum-coated metal substrate to the precipitation hardening temperature of the metal alloy substrate; and (d) cooling the tantalum-coated metal alloy substrate to a temperature below 50 degrees Celsius; wherein the process is further characterized by carrying out steps (b)-(d) under a tantalum-inert gas atmosphere and by quenching in step (b) and cooling in step (d) being carried out by flowing a tantalum-inert gas having a temperature of less than 50 degrees Celsius over the tantalum-coated metal alloy substrate.