公开(公告)号：US12104220B2

公开(公告)日：2024-10-01

申请号：US18120222

申请日：2023-03-10

申请人： ASIATECH CO., LTD.

发明人： Young Jin Lee

IPC分类号： C21D9/50 ,  B60B17/00 ,  C21D6/00 ,  C22C38/02 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

CPC分类号： C21D9/50 ,  B60B17/0006 ,  C21D6/004 ,  C21D6/005 ,  C22C38/02 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

摘要： The present disclosure relates to a welding base metal for recycling a railway wheel and a method for recycling a railway wheel using the same, which can overlay-weld a railway wheel with a welding base metal suitable for overlay-welding a railway wheel through a heat treatment, form a surface hardened layer, and strengthen the metal structure of the railway wheel, in order to recycle the railway wheel.
The welding base metal for recycling a railway wheel may be used as a surface hardened layer of a railway wheel because the welding base metal has high hardness while exhibiting a similar property to the railway wheel. Furthermore, the welding base metal can change the metal structure of the recycled railway wheel, and thus delay the initial wear time of the recycled railway wheel. The method for recycling a railway wheel may overlay-weld the damaged railway wheel to its original size, form a surface hardened layer, and change the metal structure of the railway wheel by changing the composition of the welding base metal and performing the pre-heat treatment and the post heat treatment, thereby minimizing the occurrence of damage to the recycled railway wheel.

公开(公告)号：US12036600B2

公开(公告)日：2024-07-16

申请号：US17298131

申请日：2019-11-25

申请人： POSCO ,  AUSTEM CO., LTD.

发明人： Hong-Woo Lee ,  Dong-Yoon Seok ,  Myong-Ho Shin ,  Nam-Sik Sa

IPC分类号： B21D5/10 ,  B21C37/08 ,  B21D22/02 ,  B21D53/88 ,  B23K31/02 ,  C21D9/08 ,  C21D9/50 ,  B21C37/16 ,  B23K37/00

CPC分类号： B21D5/10 ,  B21C37/0803 ,  B21D22/02 ,  B21D53/88 ,  B23K31/027 ,  C21D9/085 ,  C21D9/50 ,  B21C37/16 ,  B23K37/003

摘要： The present invention provides a method for manufacturing a torsion beam, the method comprising: a planarization step, in which a protruding portion of an upper mold presses the opposite end portions in the width direction of the blank to be plastically deformed to be flat while the opposite end portions in the width direction of the blank are supported by a side cam to face each other; a welding and bonding step for bonding the planarized opposite end portions in the width direction of the blank via welding; and a quenching step for heating the welded and bonded blank within a range of 900 to 970° C. for a retaining time within a range of 1 to 20 minutes and for cooling down the blank in a treatment liquid including at least one of water and oil in a range of 20 to 90° C.

公开(公告)号：US11866801B2

公开(公告)日：2024-01-09

申请号：US17477073

申请日：2021-09-16

申请人： PanGang Group Panzhihua Iron & Steel Research Institute Co., Ltd.

发明人： Xin Lu ,  Dadong Li ,  Wei Bai ,  Feixiang Xu

IPC分类号： C21D9/50 ,  C21D8/00 ,  C21D9/04

CPC分类号： C21D9/505 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/003 ,  C21D2211/009

摘要： The present disclosure relates to the technical field of rails welding, and particularly to a method for optimizing microstructure of a rail welded joint, the method comprises the following steps: step 1): subjecting a rail web area of a to-be-cooled welded joint which is obtained by flash butt welding to an accelerated cooling by means of an accelerated cooling device and by using compressed air as a cooling medium, measuring and monitoring temperature of a central position of the rail web of the welded joint while cooling; step 2): stopping the accelerated cooling when the temperature of the central position of the rail web drops to a preset temperature, then placing the welded joint in air and naturally cooling to room temperature, wherein the rail is a pearlite rail having a carbon content of 0.6-0.9 wt %.

公开(公告)号：US20230399051A1

公开(公告)日：2023-12-14

申请号：US18450472

申请日：2023-08-16

申请人： ArcelorMittal

发明人： Cristian ALVAREZ ,  Thierry LIZON ,  Maria POIRIER

IPC分类号： B62D21/15 ,  B23K26/60 ,  B21D22/02 ,  B23K26/00 ,  B23K26/24 ,  B23K33/00 ,  B23K35/24 ,  B23K35/38 ,  B62D27/02 ,  C21D6/00 ,  C21D9/50 ,  C22C19/05 ,  C22C30/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC分类号： B62D21/15 ,  B23K26/60 ,  B21D22/022 ,  B23K26/0006 ,  B23K26/24 ,  B23K33/00 ,  B23K35/24 ,  B23K35/383 ,  B62D27/02 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D9/505 ,  C22C19/057 ,  C22C30/02 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  B23K2101/185

摘要： A method for producing a welded blank (1) includes providing two precoated sheets (2), butt welding the precoated sheets (2) using a filler wire. The precoating (5) entirely covers at least one face (4) of each sheet (2) at the time of butt welding. The filler wire (20) has a carbon content between 0.01 wt. % and 0.45 wt. %. The composition of the filler wire (20) and the proportion of filler wire (20) added to the weld pool is chosen such that the weld joint (22) has (a) a quenching factor FTWJ: FTWJ−0.9FTBM≥0, where FTBM is a quenching factor of the least hardenable substrate (3), and FTWJ and FTBM are determined: FT=128+1553×C+55×Mn+267×Si+49×Ni+5×Cr−79×Al−2×Ni2−1532×C2−5×Mn2−127×Si2−40×C×Ni−4×Ni×Mn, and (b) a carbon content CWJ 5000, where FA=10291+4384.1×Mo+3676.9Si−522.64×Al−2221.2×Cr−118.11×Ni−1565.1×C−246.67×Mn.

公开(公告)号：US11833777B2

公开(公告)日：2023-12-05

申请号：US17055041

申请日：2019-05-15

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： Zhiyu Wang ,  Sihai Jiao ,  Shaoming Qiang ,  Huawei Zhang

IPC分类号： B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C21D9/50 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/44

CPC分类号： B32B15/011 ,  C21D6/004 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D9/50 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/44 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009

摘要： Disclosed in the present invention is a high-strength double-sided stainless steel clad sheet, including a substrate layer, and stainless steel clad layers clad-rolled on double sides of the substrate layer. The substrate layer consists, in mass percent, the chemical elements: C: 0.03-0.12%, 0

公开(公告)号：US11821053B2

公开(公告)日：2023-11-21

申请号：US15738776

申请日：2016-06-30

申请人： MAGNA INTERNATIONAL INC.

发明人： John Richard Potocki ,  Steven Reece Falter

IPC分类号： C21D9/50 ,  B23K26/00 ,  C21D1/34 ,  C22F1/04 ,  B23K9/167 ,  B23K9/173 ,  B23K31/02 ,  B23K101/00 ,  C21D1/09 ,  C21D1/26

CPC分类号： C21D9/50 ,  B23K9/167 ,  B23K9/173 ,  B23K26/00 ,  B23K31/02 ,  C21D1/34 ,  C22F1/04 ,  B23K2101/006 ,  C21D1/09 ,  C21D1/26

摘要： A method for conditioning a welded vehicle body assembly is provided. The method includes welding the vehicle body member to at least one additional vehicle body member together to form the welded vehicle body assembly, the welded vehicle body assembly includes a weld area; and laser annealing a weld heat affected zone adjacent to the weld area to soften material in the weld heat affected zone.

公开(公告)号：US20230183831A1

公开(公告)日：2023-06-15

申请号：US17801019

申请日：2021-02-24

申请人： Multimatic Inc.

发明人： Mark Sullivan

IPC分类号： C21D9/08 ,  B21K21/12 ,  B23K9/028 ,  B23K9/173 ,  B23K9/235 ,  B23K33/00 ,  C21D9/50 ,  C21D8/10 ,  C21D1/56 ,  C21D1/18

CPC分类号： C21D9/085 ,  B21K21/12 ,  B23K9/0282 ,  B23K9/173 ,  B23K9/235 ,  B23K33/008 ,  C21D9/505 ,  C21D8/105 ,  C21D1/56 ,  C21D1/18 ,  C21D2211/008

摘要： A process for preparing a multi-thickness welded steel vehicle rail, the process comprises the steps of: (a) forming a first tube having a first outer diameter, an inner diameter and a first wall thickness; (b) forming a second tube having the first outer diameter, a second inner diameter and a second wall thickness different than the first wall thickness; (c) swaging a first end of the first tube to a second outer diameter less than the second inner diameter of the second tube; (d) inserting the swaged first end of the first tube into an end of the second tube to form a joint; (e) welding the first tube and the second tube together to form a weld at the joint to form a tube blank with a heat affected zone of lower metal strength in the area of the weld; (f) preheating the tube blank to create a common crystalline microstructure along a length of the tube blank; (g) introducing the tube blank into a blow molding tool having inner molding walls; (h) molding the tube blank at an elevated temperature by expanding the tube blank against the inner molding walls of the molding tool by injecting a pressurized medium into an interior cavity of the tube blank; and (i) quenching the tube blank by replacing the pressurized medium with a cooling medium through the molding tool and the tube blank to achieve a rapid cooling effect on the tube blank and to create a completed vehicle rail with essentially uniform material strength across the weld. A completed vehicle rail has an overlapped welded structure and uniform microcrystalline structure along the length of the rail.

公开(公告)号：US11524363B2

公开(公告)日：2022-12-13

申请号：US16743431

申请日：2020-01-15

申请人： United Technologies Corporation

发明人： Wangen Lin

IPC分类号： B23K26/342 ,  B22F5/00 ,  F01D5/00 ,  F01D9/04 ,  B23P6/00 ,  B23K26/32 ,  B22F7/06 ,  B23K26/144 ,  F01D25/24 ,  B23K101/00 ,  C21D9/50 ,  B23K103/08 ,  C22C19/05

摘要： A method of reworking or repairing a component includes removing a casting defect from a component manufactured of a non-fusion weldable base alloy to form a cavity that results in a through hole; sealing the through hole with a backing; and at least partially filling the cavity with a multiple of layers of a multiple of laser powder deposition spots, each of the multiple of laser powder deposition spots formed of a filler alloy, a first layer of the multiple of layers includes a perimeter of the multiple of laser powder deposition spots that overlap a wall of the cavity and the backing.

公开(公告)号：US20220364198A1

公开(公告)日：2022-11-17

申请号：US17769829

申请日：2020-10-23

申请人： JFE Steel Corporation

发明人： Takuya Hirashima ,  Shimpei Yoshioka ,  Shinjiro Kaneko ,  Soshi Yoshimoto ,  Tomohiro Hashimukai

IPC分类号： C21D9/50 ,  C21D9/42 ,  C21D8/02 ,  C21D6/00 ,  C22C38/60 ,  C22C38/18 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

摘要： The steel sheet of the present invention has a steel microstructure containing, in area fraction, martensite: 20% to 100%, ferrite: 0% to 80%, and another metal phase: 5% or less, in which, on a surface of the steel sheet, a ratio of dislocation density in metal phases at a widthwise edge of the steel sheet to dislocation density in the metal phases at a widthwise center of the steel sheet is 100% to 140%, and, at a thicknesswise center of the steel sheet, a ratio of dislocation density in the metal phases at the widthwise edge of the steel sheet to dislocation density in the metal phases at the widthwise center of the steel sheet is 100% to 140%. The maximum amount of warpage of the steel sheet when the steel sheet is sheared to a length of 1 m in a rolling direction is 15 mm or less.

公开(公告)号：US11466339B2

公开(公告)日：2022-10-11

申请号：US16857115

申请日：2020-04-23

申请人： ArcelorMittal

发明人： Michel Sanadres ,  Christine Dessain

IPC分类号： C21D9/50 ,  C09D5/00 ,  C09D5/32 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  C21D8/02 ,  C21D1/673 ,  B21D22/02 ,  B21D35/00 ,  C08K3/04 ,  C09D123/06 ,  C09D123/12 ,  C09D133/02 ,  C09D163/00 ,  C09D167/02 ,  C21D1/22 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32 ,  C23F17/00

摘要： A fabrication method for a press hardened part is provided. A sheet or a steel substrate blank for heat treatment is provided. A pre-coating is applied. The pre-coating has at least one layer of aluminum or aluminum alloy in contact with the steel substrate on at least one of the principal faces of the sheet or blank. Then a polymerized layer is deposited on the pre-coating. The polymerized layer has a thickness between 2 and 30 μm. The polymerized layer does not contain silicon, has a nitrogen content of less than 1% by weight and carbon pigments in a quantity between 3 and 30% by weight. The blank or the sheet is heated to obtain an interdiffusion between the steel substrate and the pre-coating and to give the steel a partly or totally austenitic structure. Then the blank or the sheet is hot stamped to obtain a part. The part is cooled by holding the part in a stamping tool so that the microstructure of the steel substrate includes, at least in a portion of the part, martensite or bainite.