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公开(公告)号：EP4223893A1
公开(公告)日：2023-08-09
申请号：EP21874924.0
申请日：2021-08-10
发明人： TOYODA, Takeshi , SAKURADA, Eisaku
摘要： Provided is a hot rolled steel sheet having a tensile strength of 780 MPa or more, a sheet thickness of 1.2 to 4.0 mm, and a sheet width of 750 mm or more, and satisfying - 15≤(λ W 1 +λ W 2 )/2-λ C ≤15 (where λ W 1 and λ W 2 respectively indicate hole expansion ratios (%) at 1/8 positions of the sheet width from one end of the hot rolled steel sheet in a sheet width direction perpendicular to a rolling direction and the other end at an opposite side, and λ C indicates a hole expansion ratio (%) of a sheet width center part).
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公开(公告)号：EP4083241A1
公开(公告)日：2022-11-02
申请号：EP20907194.3
申请日：2020-12-15
摘要： This hot-rolled steel sheet has a predetermined chemical composition, a microstructure includes 80% or more of tempered martensite by a volume percentage and a remainder consisting of one or more of ferrite, pearlite, bainite, fresh martensite, and residual austenite, the tempered martensite includes 5 × 10 9 pieces/mm 3 or more of precipitates containing Ti and having an equivalent circle diameter of 5 nm or less per unit volume, in a surface layer region that is a range from a surface to a 1/10 position of a sheet thickness, a sum of an average pole density of a crystal orientation group consisting of {211} to {111} and a pole density in a crystal orientation of {110} is 6.0 or less, and a tensile strength is 980 MPa or more.
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公开(公告)号：EP3778949A1
公开(公告)日：2021-02-17
申请号：EP18911430.9
申请日：2018-03-30
发明人： TODA, Yuri , SAKURADA, Eisaku , HAYASHI, Kunio , UENISHI, Akihiro
摘要： A steel sheet has a predetermined chemical composition and a metal structure represented by, in area fraction, polygonal ferrite: 40% or less, martensite: 20% or less, bainitic ferrite: 50% to 95%, and retained austenite: 5% to 50%. In area fraction, 80% or more of the bainitic ferrite is composed of bainitic ferrite grains that have an aspect ratio of 0.1 to 1.0 and have a dislocation density of 8 × 10 2 (cm/cm 3 ) or less in a region surrounded by a grain boundary with a misorientation angle of 15° or more. In area fraction, 80% or more of the retained austenite is composed of retained austenite grains that have an aspect ratio of 0.1 to 1.0, have a major axis length of 1.0 µ m to 28.0 µ m, and have a minor axis length of 0.1 µ m to 2.8 µ m.
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4.发明授权
公开(公告)号：EP3141627B1
公开(公告)日：2019-08-14
申请号：EP15807136.5
申请日：2015-06-15
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公开(公告)号：EP2508411A1
公开(公告)日：2012-10-10
申请号：EP10834543.0
申请日：2010-11-30
CPC分类号： F16M1/08 , B62D21/11 , B62D27/023 , Y10T428/12361 , Y10T428/17
摘要： A structure including a structural member (1) configured like a frame with four sides is disclosed. A closed cross-section structural member (4) serving as a reinforcing material is provided in a crossing corner (2) of the structural member (1). The closed cross-section structural member (4) includes two horizontal portions (5) separated from each other in a thickness direction of the structural member (1) and extending in an in-plane direction of the structural member (1) and two vertical portions (6) one of which connects first ends of the two horizontal portions (5) together and the other of which connects second ends of the two horizontal portions (5) together. The closed cross-section structural member (4) includes a first opening (7) formed therein facing an inner-peripheral flat surface (1a) of the structural member (1) and a second opening (8) formed therein facing inside of the structural member (1). The height ho of the closed cross-section structural member (4) is substantially the same as the thickness H of the structural member (1). The opening edge of the first opening (7) is entirely joined to the inner-peripheral flat surface (1a) of the structural member (1). A flattening that is the ratio of the maximum width H of the second opening (8) to a height h 0 of the closed cross-section structural member (4) is greater than 1.0 and not greater than 3.0.
摘要翻译： 公开了包括构造为具有四边的框架的结构构件（1）的结构。 在结构件（1）的交叉拐角（2）处设置有用作加强材料的闭合截面结构件（4）。 封闭截面结构件（4）包括在结构件（1）的厚度方向上彼此分开并沿结构件（1）的平面内方向延伸的两个水平部分（5） 部分（6）中的一个将两个水平部分（5）的第一端连接在一起，而另一个将两个水平部分（5）的第二端连接在一起。 封闭截面结构部件（4）包括形成在其中的面向结构部件（1）的内周平坦表面（1a）的第一开口（7）和形成在结构部件（1）内部的第二开口（8） 成员（1）。 闭合截面结构件（4）的高度ho与结构件（1）的厚度H基本相同。 第一开口（7）的开口边缘整体结合到结构构件（1）的内周平坦表面（1a）。 扁平化是第二开口（8）的最大宽度H与闭合截面结构构件（4）的高度h0之比大于1.0且不大于3.0。
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公开(公告)号：EP4303334A1
公开(公告)日：2024-01-10
申请号：EP22763047.2
申请日：2022-02-22
发明人： TANAKA, Yasuaki , YABU, Shohei , SHUTO, Hiroshi , HAYASHI, Koutarou , YASUTOMI, Takashi , SAKURADA, Eisaku
摘要： There is provided a steel sheet having a chemical composition comprising, in mass%, C: 0.05 to 0.25%, Si: 0.2 to 2.0%, Mn: 1.2 to 3.0%, P: 0.030% or less, S: 0.050% or less, Al: 0.01 to 0.55%, N: 0.0100% or less, and Ti: 0.010 to 0.250%, with the balance: Fe and impurities, wherein a random intensity ratio of a texture in a near-surface portion of the steel sheet is 8.0 or less, and a minimum angle formed between a maximum strength orientation in a { 110} pole figure of the texture and a normal direction of a rolled surface of the steel sheet is 10° or less.
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公开(公告)号：EP4245878A1
公开(公告)日：2023-09-20
申请号：EP21928050.0
申请日：2021-11-19
摘要： This steel sheet has predetermined chemical composition and microstructure, in a crystal orientation distribution function of a texture at a sheet thickness 1/4 position, when A/B that is a ratio of a maximum value A of pole densities at Φ = 20° to 60° and ϕ 1 = 30° to 90° in a cross section of ϕ 2 = 45° to a maximum value B of pole densities at Φ = 120° to 60° and ϕ 1 = 30° to 90° in the cross section of ϕ 2 = 45° is 1.50 or less, a total of the maximum value A and the maximum value B is 6.00 or less, and a tensile strength is 1030 MPa or more.
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公开(公告)号：EP4148149A1
公开(公告)日：2023-03-15
申请号：EP21799825.1
申请日：2021-04-21
摘要： Adopted are a hot-rolled steel sheet having a predetermined chemical composition, in which a region, where a rotation angle between a normal line of a surface and a (011) pole near the normal line becomes 5° or less, is 0.150 or less from the surface in terms of a sheet thickness direction position standardized by a sheet thickness, and a region, where the rotation angle becomes 20° or more, is 0.250 or more from the surface in terms of the sheet thickness direction position standardized by the sheet thickness and a manufacturing method thereof.
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公开(公告)号：EP3153598B1
公开(公告)日：2020-09-09
申请号：EP15821845.3
申请日：2015-07-13
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公开(公告)号：EP3162908B8
公开(公告)日：2019-07-31
申请号：EP15822169.7
申请日：2015-07-13
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