公开(公告)号：US11952639B1

公开(公告)日：2024-04-09

申请号：US18145938

申请日：2022-12-23

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Steven Cipriano ,  Pei-chung Wang ,  Zhenke Teng

IPC分类号： C21D1/40 ,  B21J15/02 ,  B21J15/08 ,  B23K11/16 ,  C21D6/00 ,  C21D11/00 ,  B23K103/04

CPC分类号： C21D11/00 ,  B21J15/08 ,  B23K11/16 ,  C21D1/40 ,  C21D6/00 ,  B21J15/025 ,  B23K2103/04

摘要： A method for tempering steel for riveting includes positioning a first component having a first composition over a second component having a second composition, and resistance spot welding the first component to the second component using a resistance spot weld gun to form a spot weld. The method includes tempering at least one of the first component, the second component and the spot weld with the resistance spot weld gun, and coupling a third component having a third composition to the first component and the second component with a rivet, and the third composition is different than the first composition and the second composition.

公开(公告)号：US11339453B2

公开(公告)日：2022-05-24

申请号：US16811157

申请日：2020-03-06

申请人： Hyundai Motor Company ,  Kia Motors Corporation

发明人： Young Tae Kim

IPC分类号： C21D9/46 ,  C21D1/40

摘要： An apparatus can be used for heating a steel sheet. A positive electrode is configured to make contact with a first electrode area of the steel sheet and a negative electrode is configured to make contact with a second electrode area of the steel sheet. A cooling member includes a cooling block configured to make contact with a cooling area adjacent to a third edge parallel to a second direction. The cooling member is configured to radiate heat generated from the steel sheet. The positive electrode, the negative electrode, and the cooling member are arranged on the steel sheet such that the resistance of a path from the positive electrode to the negative electrode through an area with which the cooling member makes contact is higher than the resistance of a path from the positive electrode to the negative electrode through the cooling member.

公开(公告)号：US11285698B2

公开(公告)日：2022-03-29

申请号：US16977042

申请日：2018-03-20

申请人： NIPPON STEEL CORPORATION

发明人： Takuya Mitsunobu ,  Kohei Tokuda ,  Akihiro Sengoku ,  Kenichiro Matsumura

IPC分类号： B32B15/01 ,  B32B15/18 ,  B32B15/20 ,  C22C18/00 ,  C22C38/00 ,  C22C38/32 ,  C22C38/02 ,  C22C38/04 ,  C22C38/28 ,  C23C2/12 ,  B21D22/02 ,  C23C28/02 ,  C23C28/00 ,  C22C18/04 ,  C22C21/10 ,  C22C30/06 ,  C23C2/06 ,  C23C2/28 ,  C23C8/12 ,  B21D22/20 ,  C22C21/00 ,  C22C38/06 ,  C23C30/00 ,  B32B15/04 ,  C21D9/00 ,  C21D1/34 ,  C21D1/76 ,  C21D1/18 ,  C21D1/40 ,  C21D1/673 ,  C21D8/00

摘要： There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 15 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting Zn phases and insular FeAl2 phases, is located on the interface layer, and has a thickness of 1 μm to 40 μm. This hot-stamped body is excellent in fatigue properties, corrosion resistance, and chipping resistance.

公开(公告)号：US10358691B2

公开(公告)日：2019-07-23

申请号：US15103078

申请日：2014-12-23

申请人： POSCO

发明人： Jai-Hyun Kwak ,  Kyoo-Young Lee ,  Hang-Sik Cho ,  Joo-Hyun Ryu ,  Man-Young Park

IPC分类号： C21D9/52 ,  C21D9/573 ,  C21D9/60 ,  C21D1/52 ,  C21D1/42 ,  C21D1/34 ,  C21D1/60 ,  C21D1/613 ,  C21D1/773 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/56 ,  C21D1/26 ,  C21D1/40

摘要： The present invention relates to an apparatus for continuous annealing of a strip, capable of manufacturing a high-strength and highly ductile cold-rolled steel sheet having both excellent strength and ductility, and to a method for continuous annealing of a strip. The continuous annealing apparatus, according to the present invention, is capable of continuous annealing by cooling after heating, and then reheating, unlike an existing continuous annealing apparatus which heats only once and then cools or provides an overaging treatment. As a result, the continuous annealing apparatus, according to the present invention, can preliminarily render a homogeneous texture or control the texture as desired, and then perform another reheating heat treatment to stabilize the texture or control the shape thereof to a desired state. Also, provided is a continuous annealing apparatus and a continuous annealing method using the apparatus, the continuous annealing apparatus also capable of manufacturing high-strength steel having excellent processability and strength by using a low alloy, and capable of manufacturing a zinc-plated strip having excellent plated surfaces by controlling the thickness of elements and oxides enriched on the surface of the strip.

公开(公告)号：US10273568B2

公开(公告)日：2019-04-30

申请号：US14501563

申请日：2014-09-30

申请人： Glassimetal Technology, Inc.

发明人： David S. Lee ,  Joseph P. Schramm ,  Marios D. Demetriou ,  William L. Johnson ,  Montague Rittgers

IPC分类号： C22F1/00 ,  C21D1/34 ,  B29C45/00 ,  C21D1/40 ,  C22F1/10

摘要： The present disclosure is directed to the use of cellulosic materials, such as wood, paper, etc., or synthetic polymeric materials, such as a thermoplastic, rubber, etc., or a composite containing one or more of these materials as feedstock barrels for the process of injection molding of metallic glasses by rapid capacitor discharge forming (RCDF) techniques.

公开(公告)号：US10260121B2

公开(公告)日：2019-04-16

申请号：US15426518

申请日：2017-02-07

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Qi Lu ,  Jianfeng Wang

IPC分类号： C21D1/19 ,  C21D1/40 ,  C21D1/42 ,  C21D1/52 ,  C21D8/00 ,  C21D9/00 ,  C21D1/673 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38

摘要： In a method for increasing steel impact toughness, the steel composition contains from about 5 wt % to about 10 wt % manganese and has a martensite finish temperature (Mf) below room temperature. The steel composition is exposed to hot forming to form a steel part. During hot forming, the steel composition is subjected to a heat treatment temperature above its fully austenite formed temperature, is transferred to a die, and while in the die, is simultaneously formed and quenched. In one example, quenching cools the steel composition to room temperature, and the steel part is removed from the die and reheated to a baking temperature ranging from about 120° C. to about 400° C. In another example, quenching is interrupted at an interruption temperature ranging from about 120° C. to about 400° C., and the steel composition is maintained at the interruption temperature for a predetermined time and then is cooled to room temperature.

公开(公告)号：US20190039109A1

公开(公告)日：2019-02-07

申请号：US16073980

申请日：2017-02-03

申请人： voestalpine Stahl GmbH ,  voestalpine Metal Forming GmbH

发明人： MICHAEL HASLMAYR ,  ANDREAS SOMMER ,  REINER KELSCH ,  BENEDIKT TUTEWOHL ,  LEOPOLD STEGFELLNER

IPC分类号： B21D22/02 ,  B21D37/16 ,  C21D1/40 ,  C21D9/46 ,  C21D1/18

摘要： The invention relates to an apparatus for heating sheet steel blanks, in particular for shaping and hardening in a press hardening process, wherein there is a heating device, and the heating device includes at least one heating module; the at least one heating module has a boxlike element embodied in cassette-like fashion, which has a plate-shaped or rectangular cavity that has a flat plate on an underside; at least one heating element is positioned in the cavity, which element is embodied as an electrical resistance heating element, and the cavity is completely filled in an embedding fashion so that it is completely enclosed by a highly heat-conductive material, preferably copper, and relates to a method therefor.

公开(公告)号：US20190030584A1

公开(公告)日：2019-01-31

申请号：US16128940

申请日：2018-09-12

申请人： NETUREN CO., LTD.

发明人： Hironori OOYAMA ,  Fumiaki IKUTA

IPC分类号： B21D22/02 ,  H05B3/00 ,  H05B3/03 ,  C21D9/46 ,  C21D1/673 ,  C21D1/40

摘要： A heating method, a heating apparatus, and a hot press holding method for a plate workpiece are provided. The plate workpiece has a first region and a second region. A cross sectional area of the first region in a widthwise direction of the plate workpiece is substantially uniform along a longitudinal direction of the plate workpiece or is monotonically increased or decreased along the longitudinal direction. The second region is adjoining a portion of the first region in a monolithic manner. The method includes heating the second region, and heating at least the first region by direct resistance heating along the longitudinal direction. The second region is heated before heating the first region such that the first region and the second region are heated to be in a given temperature range.

公开(公告)号：US10131117B2

公开(公告)日：2018-11-20

申请号：US13147178

申请日：2010-02-01

申请人： Isabelle Thirion ,  Thomas Vietoris ,  Raisa Grigorieva ,  Pascal Drillet ,  Ludwig Schaller ,  Karl Michael Bader ,  Uwe Paar ,  Michael Alsmann

发明人： Isabelle Thirion ,  Thomas Vietoris ,  Raisa Grigorieva ,  Pascal Drillet ,  Ludwig Schaller ,  Karl Michael Bader ,  Uwe Paar ,  Michael Alsmann

IPC分类号： C21D1/40 ,  B32B15/01 ,  C21D1/42 ,  C21D1/673 ,  C21D1/68 ,  C21D1/70 ,  C21D7/13 ,  C22C21/00 ,  C22C21/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/32 ,  C23C10/28 ,  C21D1/08 ,  C21D1/09

摘要： A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature Ti comprised between Te−10° C. and Te, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature Ti up to a temperature Tm comprised between 840 and 950° C. under non protective atmosphere with a heating rate V comprised between 30° C./s and 90° C./s, V being the heating rate between the temperature Ti and the temperature Tm, in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature Tm for a time tm comprised between 20 s and 90 s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

公开(公告)号：US09745641B2

公开(公告)日：2017-08-29

申请号：US15094740

申请日：2016-04-08

申请人： California Institute of Technology

发明人： William L. Johnson ,  Marios D. Demetriou ,  Choong Paul Kim ,  Joseph P. Schramm

IPC分类号： C22C1/00 ,  C21D7/13 ,  C21D1/34 ,  C21D1/38 ,  C21D1/40 ,  C22C45/00 ,  C22F1/00 ,  B21J9/08 ,  H05B3/00 ,  C22C45/02 ,  C22C45/10 ,  C22F1/14 ,  C22F1/18

CPC分类号： C21D7/13 ,  B21J9/08 ,  C21D1/34 ,  C21D1/38 ,  C21D1/40 ,  C21D2201/03 ,  C22C45/00 ,  C22C45/003 ,  C22C45/02 ,  C22C45/10 ,  C22F1/00 ,  C22F1/14 ,  C22F1/186 ,  H05B3/0004

摘要： An apparatus and method of uniformly heating, rheologically softening, and thermoplastically forming metallic glasses rapidly into a net shape using a rapid capacitor discharge forming (RCDF) tool are provided. The RCDF method utilizes the discharge of electrical energy stored in a capacitor to uniformly and rapidly heat a sample or charge of metallic glass alloy to a predetermined “process temperature” between the glass transition temperature of the amorphous material and the equilibrium melting point of the alloy in a time scale of several milliseconds or less. Once the sample is uniformly heated such that the entire sample block has a sufficiently low process viscosity it may be shaped into high quality amorphous bulk articles via any number of techniques including, for example, injection molding, dynamic forging, stamp forging, and blow molding in a time frame of Less than 1 second.