公开(公告)号：US12104255B2

公开(公告)日：2024-10-01

申请号：US17866628

申请日：2022-07-18

申请人： ArcelorMittal

发明人： Tiago Machado Amorim ,  Christian Allely ,  Gregory Leuillier

IPC分类号： C23C2/12 ,  C21D1/673 ,  C21D8/00 ,  C21D8/02 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C22C21/10 ,  C22F1/053 ,  C23C22/07

CPC分类号： C23C2/12 ,  C21D1/673 ,  C21D8/0257 ,  C23C2/06 ,  C23C2/26 ,  C23C2/261 ,  C23C2/28 ,  C23C2/29 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

摘要： A hardened part coated with a phosphatable coating is provided. The part is made by a method that includes providing a steel sheet pre-coated with a metallic coating including from 4.0 to 20.0% by weight of zinc, from 1.0 to 3.5% by weight of silicon, optionally from 1.0 to 4.0% by weight of magnesium, and optionally additional elements chosen from Pb, Ni, Zr, or Hf, the content by weight of each additional element being less than 0.3% by weight, the balance being aluminum and unavoidable impurities and residuals elements. The steel sheet is cut to obtain a blank, the blank is thermally treated at a temperature between 840 and 950° C. to obtain a fully austenitic microstructure in the steel, the blank is transferred into a press tool and hot-formed to obtain a part. The part is cooled to obtain a martensitic or martensitic-bainitic microstructure or made of at least 75% of equiaxed ferrite, from 5 to 20% of martensite and bainite in amount less than or equal to 10%.

公开(公告)号：US12043877B2

公开(公告)日：2024-07-23

申请号：US18012882

申请日：2021-08-06

申请人： NIPPON STEEL CORPORATION

发明人： Katsuya Nakano ,  Yuji Sakiyama ,  Takashi Yasutomi ,  Yoshiaki Honda ,  Masahiro Nakata

IPC分类号： C22C38/00 ,  C21D3/04 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60

CPC分类号： C21D9/46 ,  C21D3/04 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60

摘要： A steel sheet includes a sheet thickness center part and a first surface layer softened part and a second surface layer softened part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer softened part and second surface layer softened part have 10 μm or more average thicknesses and have average Vickers hardnesses of 0.90 times or less of the average Vickers hardness of a sheet thickness ½ position, and the first surface layer softened part has an average Vickers hardness of 1.05 times or more the average Vickers hardness of the second surface layer softened part.

公开(公告)号：US20240117456A1

公开(公告)日：2024-04-11

申请号：US18278326

申请日：2022-03-16

申请人： NIPPON STEEL CORPORATION

发明人： Shinichiro TABATA ,  Kazuhisa KUSUMI

IPC分类号： C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/40

CPC分类号： C21D9/46 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/40

摘要： This steel sheet includes: a base steel sheet having a predetermined chemical composition; and a scale formed on a surface of the base steel sheet, in which the base steel sheet has a decarburized layer formed on a side of an interface with the scale, the decarburized layer has an internal oxidized layer formed on the side of the interface with the scale, a depth of the decarburized layer from an interface between the base steel sheet and the scale is 90 μm or more, a depth of the internal oxidized layer from the interface is less than 30 μm, and the scale contains 80% or more of Fe by mass %.

公开(公告)号：US20240101426A1

公开(公告)日：2024-03-28

申请号：US18274840

申请日：2022-02-01

申请人： The Johns Hopkins University

发明人： Jonah D. Erlebacher ,  Gina Greenidge

IPC分类号： C01B32/05 ,  B22D11/00 ,  B22D11/06 ,  C21D8/02

CPC分类号： C01B32/05 ,  B22D11/001 ,  B22D11/0611 ,  C21D8/0257 ,  C21D2211/004

摘要： Provided herein are methods of transforming a first carbon material into a second carbon material, and uses thereof.

公开(公告)号：US20190040487A1

公开(公告)日：2019-02-07

申请号：US15668751

申请日：2017-08-04

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Charles Enloe ,  Curt D. Horvath ,  David Yang ,  Qi Lu ,  Wu Tao

IPC分类号： C21D9/46 ,  C21D8/02 ,  C21D3/04 ,  C23C2/06 ,  B32B15/01 ,  B23K11/11 ,  B23K11/16 ,  B23K26/22 ,  B23K26/322

CPC分类号： C21D9/46 ,  B23K11/11 ,  B23K11/115 ,  B23K11/166 ,  B23K26/22 ,  B23K26/322 ,  B23K2103/166 ,  B32B15/013 ,  C21D3/04 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0257 ,  C21D2211/005 ,  C23C2/02 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C23C8/18 ,  C23C28/02 ,  C23C28/025 ,  C23C30/00 ,  C23C30/005 ,  Y10T428/12458 ,  Y10T428/12799 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/2495 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

摘要： A multilayer steel includes a core formed of transformation-induced plasticity (TRIP) steel. A decarburized layer is exterior to the core on at least one side thereof. The decarburized layer has reduced carbon content relative to the core. A zinc-based layer is exterior to the decarburized layer. The decarburized layer may have a composition of at least 80 percent ferrite, such that LME is reduced or mitigated. In some configurations, the decarburized layer is between 10-50 microns thick. A method of creating a coated advanced high-strength steel component is also provided. An apparatus for forming a coated advanced high-strength steel is also provided. The core of the multilayer steel may have a carbon weight-percent of less than or equal to 0.4. The decarburized layer of the multilayer steel may have a carbon weight-percent of less than or equal to 50 percent of the carbon weight-percent of the core.

公开(公告)号：US09957582B2

公开(公告)日：2018-05-01

申请号：US15609841

申请日：2017-05-31

申请人： ArcelorMittal

发明人： Juan David Puerta Velasquez ,  Jonas Staudte ,  Pascal Drillet

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/32 ,  C21D8/02 ,  B32B15/01 ,  C23C2/28 ,  C22C38/28 ,  C22C38/06 ,  C22C38/00 ,  C21D6/00 ,  C23C2/12 ,  C23C2/06

CPC分类号： C21D8/0278 ,  B32B15/012 ,  B32B15/013 ,  C21D1/34 ,  C21D1/52 ,  C21D1/673 ,  C21D1/74 ,  C21D1/76 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0457 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

摘要： A cold-rolled sheet is provided. The cold-rolled sheet includes a steel substrate with a carbon content C0 between 0.07% and 0.5%, expressed by weight, and a metal pre-coating on at least the two principal faces of the steel substrate. The substrate has a decarburized area on the surface of each of the two principal faces. The depth p50% of the decarburized area is between 6 and 30 micrometers, and p50% is the depth at which the carbon content is equal to 50% of the content C0. The sheet does not contain a layer of iron oxide between the substrate and the metal pre-coating.

公开(公告)号：US20180105908A1

公开(公告)日：2018-04-19

申请号：US15567418

申请日：2016-04-22

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Koutarou HAYASHI ,  Akihiro UENISHI ,  Masaharu KAMEDA ,  Jun HAGA ,  Kunio HAYASHI ,  Kohichi SANO ,  Hiroyuki KAWATA

IPC分类号： C22C38/58 ,  C21D9/46 ,  C21D8/02 ,  C23C2/40 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/34 ,  C22C38/06 ,  C22C38/00

CPC分类号： C22C38/58 ,  C21D8/0257 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

摘要： A base material (13) included in a plated steel sheet (1) includes a structure, at a ¼ sheet thickness position, represented by, in volume fraction: tempered martensite: 3.0% or more; ferrite: 4.0% or more; and retained austenite: 5.0% or more. An average hardness of the tempered martensite in the base material (13) is 5 GPa to 10 GPa, and a part or all of the tempered martensite and the retained austenite in the base material form an M-A. A volume fraction of ferrite in a decarburized ferrite layer (12) included in the plated steel sheet (1) is 120% or more of the volume fraction of the ferrite in the base material (13) at the ¼ sheet thickness position, an average grain diameter of the ferrite in the decarburized ferrite layer (12) is 20 μm or less, a thickness of the decarburized ferrite layer (12) is 5 μm to 200 μm, a volume fraction of tempered martensite in the decarburized ferrite layer (12) is 1.0 volume % or more, a number density of the tempered martensite in the decarburized ferrite layer (12) is 0.01/μm2 or more, and an average hardness of the tempered martensite in the decarburized ferrite layer (12) is 8 GPa or less.

公开(公告)号：US09909194B2

公开(公告)日：2018-03-06

申请号：US14426523

申请日：2013-09-06

申请人： ARCELORMITTAL INVESTIGACIÓN Y DESARROLLO, S.L.

发明人： Juan David Puerta Velasquez ,  Jonas Staudte ,  Pascal Drillet

IPC分类号： C21D8/02 ,  C22C38/32 ,  C22C38/28 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D6/00 ,  C23C2/12 ,  C23C2/06 ,  C23C2/28 ,  B32B15/01

CPC分类号： C21D8/0278 ,  B32B15/012 ,  B32B15/013 ,  C21D1/34 ,  C21D1/52 ,  C21D1/673 ,  C21D1/74 ,  C21D1/76 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0457 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

摘要： A cold-rolled sheet is provided. The cold-rolled sheet is annealed and pre-coated for the fabrication of press hardened parts, composed of a steel substrate for heat treatment with a carbon content C0 between 0.07% and 0.5%, expressed by weight, and a metal pre-coating on at least the two principal faces of the steel substrate. The substrate comprises a decarburized area on the surface of each of the two principal faces. The depth p50% of the decarburized area is between 6 and 30 micrometers, and p50% is the depth at which the carbon content is equal to 50% of the content C0. The sheet does not contain a layer of iron oxide between the substrate and the metal pre-coating. Processes are also provided.

公开(公告)号：US20160160335A1

公开(公告)日：2016-06-09

申请号：US14903158

申请日：2014-07-02

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： Muneaki IKEDA

IPC分类号： C23C2/06 ,  C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C21D1/74 ,  C22C38/38 ,  C22C38/34 ,  C22C38/28 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C8/18

CPC分类号： C23C2/06 ,  B32B15/01 ,  B32B15/012 ,  B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/74 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0257 ,  C21D8/0263 ,  C21D9/46 ,  C21D9/48 ,  C21D9/561 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38 ,  C23C2/02 ,  C23C2/40 ,  C23C8/18 ,  C23C28/3225 ,  C23C28/345 ,  C23C30/00 ,  C23C30/005 ,  Y10T428/12757 ,  Y10T428/12792 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12958 ,  Y10T428/12972

摘要： The present invention relates to a high-strength plated steel sheet having a plated layer on a surface of a base steel sheet, contains predetermined steel compositions, and includes, in order from a base steel sheet side of an interface between the base steel sheet and the plated layer: a soft layer having a Vickers hardness of 90% or less of a Vickers hardness of a t/4 portion of the base steel sheet, where t is a thickness of the base steel sheet, and a hard layer having a structure containing martensite and bainite as main components. The soft layer has an average depth D of 20 μm or more, an internal oxide layer has an average depth d of 4 μm or more and less than D.

摘要翻译： 本发明涉及一种在基体钢板的表面上具有镀层的高强度电镀钢板，其含有预定的钢组成，并且从基材钢板与基体钢板之间的界面的基材钢板侧起， 电镀层：维氏硬度为基础钢板的4 / V部的维氏硬度的90％以下的软质层，t为基材钢板的厚度，硬质层为含有 马氏体和贝氏体为主要成分。 软层的平均深度D为20μm以上，内部氧化物层的平均深度d为4μm以上且小于D。

公开(公告)号：US20160010170A1

公开(公告)日：2016-01-14

申请号：US14771896

申请日：2014-03-04

申请人： ARCANUM ALLOY DESIGN INC.

发明人： Adam G. Thomas ,  Daniel E. Bullard ,  Joseph E. McDermott

IPC分类号： C21D8/02 ,  C22F1/00 ,  C21D6/00 ,  C22C21/00 ,  C22C38/54 ,  C22C38/52 ,  C22C38/50 ,  C22C38/46 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/06 ,  C25D7/06 ,  C23C14/16 ,  C23C14/34 ,  C22F1/04

CPC分类号： C21D8/0257 ,  B32B15/01 ,  B32B15/013 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0221 ,  C22C21/00 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22F1/008 ,  C22F1/04 ,  C23C14/16 ,  C23C14/34 ,  C25D7/0614

摘要： Herein is described a process for preparing an alloy that includes defining a product composition, thickness, and homogeneity; providing a base that has a thickness less than the product thickness and has a base composition; depositing an alloying material onto at least one surface of the base to yield a coated base that has a composition equal the product composition but has a different homogeneity; and then full thickness annealing the base and the alloying material to provide the product homogeneity. The process can be used to provide ultrathin foils, for example, ultrathin foils of ferrous or aluminum alloys.

摘要翻译： 本文描述了一种制备合金的方法，其包括定义产物组成，厚度和均匀性; 提供具有小于产品厚度的厚度并具有基础组成的基底; 将合金材料沉积在基底的至少一个表面上以产生具有等于产物组成但具有不同均匀性的组成的涂覆基体; 然后对基体和合金材料进行全厚度退火，以提供产品均匀性。 该方法可用于提供超薄箔，例如，铁或铝合金的超薄箔。