-
公开(公告)号：US20210285068A1
公开(公告)日：2021-09-16
申请号：US16336629
申请日：2017-09-04
发明人： Suguru YOSHIDA , Shinya TERAMOTO , Akira SHIGA , Manabu KUBOTA , Hajime HASEGAWA , Hideo MIZUKAMI
摘要： There is provided a hot rolled steel according to one aspect of the invention including, as a predetermined chemical composition: Bi: 0.0001 mass % to 0.0050 mass %, in which 90 area % or more of a metallographic structure is configured with a ferrite and a pearlite, and an average number density of Mn sulfides measured on a cross section parallel to a rolling direction having an aspect ratio of more than 10 and 30 or less which is extended along the rolling direction, is 50 pieces/mm2 to 200 pieces/mm2.
-
公开(公告)号：US11090755B2
公开(公告)日：2021-08-17
申请号：US16060121
申请日：2016-12-16
IPC分类号： B23K9/167 , C22C38/32 , C22C38/54 , C22C38/46 , C22C38/44 , C22C38/04 , C22C38/42 , C22C38/52 , C22C38/50 , C22C38/48 , B23K9/23 , B23K35/30 , C22C38/02 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/30
摘要： The present invention provides a welding material for ferritic heat-resistant steel, a welded joint for ferritic heat-resistant steel, and a method for producing the welded joint for to form a weld metal having a high creep strength and a high toughness in welding a ferritic heat-resistant steel that contains B. The welding material for ferritic heat-resistant steel has a chemical composition containing, in mass %, C: 0.06 to 0.10%, Si: 0.1 to 0.4%, Mn: 0.3 to 0.7%, Co: 2.6 to 3.4%, Ni: 0.01 to 1.10%, Cr: 8.5 to 9.5%, W: 2.5 to 3.5%, Nb: 0.02 to 0.08%, V: 0.1 to 0.3%, Ta: 0.02 to 0.08%, B: 0.007 to 0.015%, N: 0.005 to 0.020%, with the balance being Fe and impurities, and satisfying Formula (1): 0.5≤Cr+6Si+1.5W+11V+5Nb+10B−40C−30N−4Ni−2Co−2Mn≤10.0 (1).
-
13.发明授权公开(公告)号：US11066720B2
公开(公告)日：2021-07-20
申请号：US15540855
申请日：2016-03-22
IPC分类号： C21D9/46 , C22C38/00 , C22C38/58 , C21D8/04 , B21B1/22 , B21B3/00 , C21D6/00 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C23G1/08
摘要： A Si/Mn ratio of steel material components of a base material is not less than 0.27 nor more than 0.90 in mass ratio, an internal oxide layer having a thickness of not less than 1 μm nor more than 30 μm is provided right below an oxide scale of a steel sheet surface layer portion, and regarding the internal oxide layer, an internal oxide in a crystal grain of the internal oxide layer is an oxide containing Si and having a thickness of not less than 10 nm nor more than 200 nm in a crystal grain in a range of greater than 0% and 30% or less of a thickness of the internal oxide layer from an interface between the internal oxide layer and base iron toward a direction of the surface layer oxide scale, one or more branches of the internal oxide exist in a cross section of 1 μm×1 μm square, and in any crystal grain boundary having a length of 1 μm, one or more of the internal oxides in the crystal grain are connected to an internal oxide of the crystal grain boundary to form a net-like structure.
-
公开(公告)号：US11065666B2
公开(公告)日：2021-07-20
申请号：US16071424
申请日：2017-01-20
发明人： Yasuhiro Ito
摘要： A burring method includes: a placement process of disposing a sheet-shaped workpiece formed with a through hole such that a punch is positioned on one sheet thickness direction side of the workpiece and a pad is positioned on the opposite side to the one sheet thickness direction side of the workpiece; and an extrusion process of forming a flange by moving the punch toward the opposite side relative to the workpiece and extruding a peripheral rim of the through hole in the workpiece with the punch in a state in which the peripheral rim of the through hole is pressed by the punch and the pad in the sheet thickness direction of the workpiece.
-
公开(公告)号：US11035021B2
公开(公告)日：2021-06-15
申请号：US16067393
申请日：2017-03-23
发明人： Hiroyuki Kawata , Yuji Yamaguchi , Takayuki Kitazawa , Satoshi Uchida , Kohei Ueda , Naoki Maruyama
IPC分类号： C21D9/46 , C22C38/06 , C22C38/58 , C23C2/40 , C22C18/00 , C22C38/12 , C25D5/50 , C21D8/02 , C22C38/14 , C22C38/16 , C23C2/06 , C22C38/04 , C22C38/08 , C22C38/34 , C25D7/06 , B32B15/01 , C21D6/00 , C22C38/00 , C22C38/02 , C22C38/28 , C22C38/32 , C22C38/42 , C22C38/44 , C25D3/22 , C25D5/36
摘要： A high-strength steel sheet includes: a specific chemical composition; and a microstructure represented by, in a ⅛ thickness to ⅜ thickness range with ¼ thickness of a sheet thickness from a surface being a center, in volume fraction, ferrite: 85% or less, bainite: 3% or more and 95% or less, tempered martensite: 1% or more and 80% or less, retained austenite: 1% or more and 25% or less, pearlite and coarse cementite: 5% or less in total, and fresh martensite: 5% or less, in which the solid-solution carbon content in the retained austenite is 0.70 to 1.30 mass %, and to all grain boundaries of retained austenite grains having an aspect ratio of 2.50 or less and a circle-equivalent diameter of 0.80 μm or more, the proportion of interfaces with the tempered martensite or the fresh martensite is 75% or less.
-
公开(公告)号：US11028469B2
公开(公告)日：2021-06-08
申请号：US16323307
申请日：2016-08-16
IPC分类号： C22C38/58 , B21D22/02 , C21D1/673 , C21D6/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/44
摘要： A hot press-formed part according to an aspect of the present invention contains a predetermined chemical composition; in which a microstructure in a thickness ¼ portion includes, by unit vol %, tempered martensite: 20% to 90%, bainite: 5% to 75%, and residual austenite: 5% to 25%, and ferrite is limited to 10% or less; and a pole density of an orientation {211} in the thickness ¼ portion is 3.0 or higher.
-
公开(公告)号：US11027361B2
公开(公告)日：2021-06-08
申请号：US16145696
申请日：2018-09-28
发明人： Chisato Wakabayashi , Fuminori Watanabe , Seiji Furusako , Yasunobu Miyazaki , Hiroyuki Kawata , Tohru Okada , Hideki Hamatani
IPC分类号： B23K11/11 , B23K11/16 , B23K103/04
摘要： By obtaining a spot-welded joint being a spot-welded joint formed by overlapping a plurality of pieces of steel plates (1A, 1B) and performing spot welding on the steel plates, including a high-strength steel plate whose tensile strength is 750 (MPa) to 2500 (MPa), being at least one piece of steel plate out of the plurality of pieces of steel plates, in which a carbon equivalent Ceq of the high-strength steel plate is 0.20 mass % to 0.55 mass %, and ten or more of iron-based carbides in each of which a length of a longest portion is 0.1 (μm) or more exist in a square region 103 within a heat-affected zone 4 of a cross section that passes through a center of a welding mark, and is cut along a plate thickness direction of the steel plates (1A, 1B), a cross tensile strength of the spot-welded joint to be formed is improved.
-
公开(公告)号：US10994591B2
公开(公告)日：2021-05-04
申请号：US16320948
申请日：2017-07-26
IPC分类号： B60J5/04
摘要： Provided is a configuration that makes up for a lack of tensile rigidity and a lack of collision properties at the same time. [Solution] An automotive exterior panel according to the present invention: an exterior material 110; and a reinforcing member 120 that is in contact along an automobile inside surface of the exterior material 110 and of which a second moment of area in a direction orthogonal to the exterior material is less than or equal to 15,000 mm4 in a cross section orthogonal to a longitudinal direction of the 10 reinforcing member. By this configuration, the second moment of area in a direction orthogonal to the longitudinal direction of the reinforcing member 120 is made less than or equal to 15,000 mm4, and hence a lack of tensile rigidity can be made up for at the same time.
-
19.发明授权公开(公告)号：US10974316B2
公开(公告)日：2021-04-13
申请号：US16061444
申请日：2017-01-27
发明人： Yuki Kuwauchi , Hitoshi Funagane , Satoru Hayashi
IPC分类号： B22D11/124 , B22D11/22
摘要： A secondary cooling method and a secondary cooling device for a casting product casted in a continuous casting machine, the continuous casting machine including, in a secondary cooling zone below a mold, a plurality of pairs of support rolls that support the casting product from both sides of the casting product in a thickness direction, a cooling device being disposed between support rolls adjacent to each other along a casting direction of the continuous casting machine, the cooling device including a coolant pipe that supplies a coolant, and a coolant guide plate with a flat plate shape for spreading the coolant on the casting product, the coolant guide plate being disposed parallel to and spaced in a perpendicular direction from a surface of the casting product.
-
公开(公告)号：US10933457B2
公开(公告)日：2021-03-02
申请号：US16068705
申请日：2017-01-25
发明人： Yasuhiro Ito
摘要： A method for manufacturing a press-formed product includes a first step and a second step. In the first step, a concavity is press formed in a blank by use of a punch and a first die. The punch has a shape corresponding to the shape of the entire press-formed product. The first die has a shape corresponding to at least the shape of the concavity. In the second step, a vertical wall and an edge portion are press formed in the blank by use of the punch and a second die. The second die is located adjacent to the first die. The second die has a shape corresponding to at least the shape of the vertical wall and the edge portion. The first step is completed after the second step is completed. The method allows production of a press-formed product which is excellent in fatigue resistance.
-
-
-
-
-
-
-
-
-
搜索结果
2124 条记录 (耗时 0.038 秒)
