公开(公告)号：US10738366B2

公开(公告)日：2020-08-11

申请号：US15022004

申请日：2013-12-20

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Hideki Hamatani ,  Keinosuke Iguchi ,  Masakazu Ozaki ,  Takaaki Fukushi ,  Takuya Asano

IPC分类号： C22C38/58 ,  C22C38/48 ,  C22C38/50 ,  C22C38/14 ,  C22C38/38 ,  C22C38/12 ,  C21D8/10 ,  C21D9/08 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/26 ,  C21D8/04 ,  C22C38/16 ,  C22C38/28 ,  C22C38/08 ,  C22C38/06 ,  F16L9/17 ,  C21D9/50 ,  B23K35/30

摘要： The present invention provides electric-resistance welded steel pipe optimal for applications such as production of shale gas which is comprised of steel having a chemical composition which contains, by mass %, respectively, C: 0.08 to 0.18%, Si: 0.01% to 0.50%, Mn: 1.30 to 2.1%, Al: 0.001 to 0.10%, Nb: 0.005 to 0.08%, and Ti: 0.005 to 0.03%, is limited to N 0.008% or less, P: 0.020% or less, and S: 0.010% or less, and has a balance of Fe and unavoidable impurities, wherein a structure at a center part of thickness is 40% to 70% by area of ferrite phase having a circle-equivalent diameter of 1.0 μm to 10.0 μm and a balance of a low temperature transformation phase comprising a bainite phase, and Ceq satisfies 0.32≤Ceq≤0.60.

公开(公告)号：US10167538B2

公开(公告)日：2019-01-01

申请号：US15108950

申请日：2014-02-04

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Yosuke Kiyota ,  Takaaki Fukushi ,  Hideyuki Nakamura

IPC分类号： C22C38/04 ,  C22C38/38 ,  C21D9/08 ,  C22C38/00 ,  C22C38/12 ,  C22C38/02 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  B23K11/087 ,  B23K11/093 ,  C22C38/08 ,  F16L9/02

摘要： A steel pipe, consisting of, in terms of mass %: from 0.06% to 0.25% of C, 0.50% or less of Si, 1.00% to 1.80% of Mn, 0.030% or less of P, 0.020% or less of S, 0.08% or less of Al, 0.008% or less of N, 0.080% or less of Nb, and a remainder consisting of Fe and unavoidable impurities, wherein a compressive residual stress at an outer surface measured by an X-ray method is 250 MPa or more, and a compressive residual stress at a position at a depth of 1 mm from the outer surface measured by the X-ray method is 70% or more of the compressive residual stress at the outer surface measured by the X-ray method.

公开(公告)号：US20160193641A1

公开(公告)日：2016-07-07

申请号：US14911601

申请日：2014-08-07

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Hideki HAMATANI ,  Kenichi YAMAMOTO ,  Masafumi MIYAZAKI ,  Masaki INA ,  Takaaki Fukushi

IPC分类号： B21C37/08 ,  C22C38/26 ,  C22C38/24 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/14 ,  C21D8/10 ,  B22D11/00 ,  B23K11/087 ,  B23K11/34 ,  C22C33/04 ,  C22C38/28

CPC分类号： B21C37/08 ,  B22D11/001 ,  B23K11/0873 ,  B23K11/34 ,  C21D8/105 ,  C21D9/08 ,  C21D9/14 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28

摘要： Electric resistance welded steel pipe excellent in weld zone quality suitable for oil country tubular goods and line pipe wherein steel plate forming the base metal of the electric resistance welded steel pipe has a predetermined chemical composition, the contents of Ca, O, S, Ce, La, and Al satisfy XCASO = ( Ca O + Ca S + 0.285  Ce + La O + 0.285  Ce + La S ) × ( Al Ca ) > 78 the oxide-based inclusions in the weld zone of the electric resistance welded steel pipe contains one or both of Ce and La, and the long axis/short axis of the oxide-based inclusions is 2.5 or less.

摘要翻译： 电焊焊接钢管焊接区质量优良，适用于油罐管和管线管，其中形成电阻焊钢管基体的钢板具有预定的化学成分，Ca，O，S，Ce， La和Al满足电阻焊钢的焊接区域中的氧化物系夹杂物的XCASO =（CaO + Ca S + 0.285 Ce Ce + La O + 0.285 Ce + La S）×（Al Ca）> 78 管含有Ce和La中的一种或两种，氧化物系夹杂物的长轴/短轴为2.5以下。

公开(公告)号：US11028456B2

公开(公告)日：2021-06-08

申请号：US16327066

申请日：2017-08-23

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Takaaki Fukushi ,  Yasuhiro Shinohara ,  Hideki Hamatani

IPC分类号： C22C38/04 ,  C22C38/06 ,  C22C38/00 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/28 ,  C22C38/26 ,  C22C38/08 ,  C22C38/02 ,  C22C38/58 ,  C21D8/10 ,  B23K35/30 ,  C21D9/08 ,  C21D9/46 ,  B23K11/00

摘要： An electric resistance welded steel pipe for a torsion beam, in which a base metal portion includes, in terms of % by mass, 0.04 to 0.12% of C, 0.03 to 1.20% of Si, 0.30 to 2.50% of Mn, 0.08 to 0.24% of Ti, 0.005 to 0.500% of Al, 0.01 to 0.06% of Nb, and 0.0005 to 0.0100% of N, a balance including Fe and impurities, wherein Vc90, defined by the following Formulae (i) and (ii), is 200 or more, a mass ratio of Ti content to C content is from 0.85 to 5.00, an areal ratio of ferrite is 80% or more, an average crystal grain size of ferrite crystal grains is 10 μm or less, and an average aspect ratio of ferrite crystal grains is 2.0 or less, in a metallographic microstructure of a central portion in a wall thickness direction of the base metal portion; log Vc90=2.94−0.75(βa−1)  Formula (i); βa=2.7C+0.4Si+Mn+0.45Ni+0.8Cr+Mo  Formula (ii).

公开(公告)号：US09573436B2

公开(公告)日：2017-02-21

申请号：US14764729

申请日：2013-01-30

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： Takeshi Kawachi ,  Eisaku Sakurada ,  Takaaki Fukushi

IPC分类号： B60G3/12 ,  B60G21/05 ,  B60B35/04

CPC分类号： B60G21/051 ,  B60B35/007 ,  B60B35/025 ,  B60B35/04 ,  B60B35/08 ,  B60G2200/21 ,  B60G2206/202

摘要： A torsion beam which is used in a suspension system of an automobile which is provided with a pair of arm members which extend in a front-rear direction of the automobile and are designed to be connected to a chassis of the automobile so as to be able to swing and to have wheels attached rotably to them is disclosed. The torsion beam is formed with a recess which extends in the longitudinal direction whereby that torsion beam has first and second leg parts in a plane vertical to the longitudinal direction and exhibits a substantially V-shaped or substantially U-shaped cross-sectional shape. The torsion beam is provided with connection parts which are provided at the two ends of that torsion beam and are connected to the arm members, a fixed shape part which is provided at a center part in the longitudinal direction of that torsion beam, and asymmetric shape parts which are provided between that fixed shape part and the connection parts. At the asymmetric shape parts, the depth of the recess becomes gradually deeper from the connection parts toward the fixed shape part and the first leg part has a larger width dimension than the width dimension of the second leg part.

摘要翻译： 一种用于汽车的悬挂系统的扭力梁，其具有沿汽车的前后方向延伸的一对臂部件，并被设计成与汽车的底盘连接从而能够 公开了摆动并将轮子可旋转地附接到他们。 扭转梁形成有沿纵向方向延伸的凹部，由此该扭转梁在垂直于纵向方向的平面中具有第一和第二腿部部分，并且呈现大致V形或大致U形的横截面形状。 扭力梁设置有连接部件，该连接部件设置在该扭转梁的两端并连接到臂部件，固定形状部分设置在该扭转梁的纵向方向上的中心部分处，不对称形状 设置在该固定形状部和连接部之间的部分。 在不对称形状部分，凹部的深度从连接部朝向固定形状部逐渐变深，第一腿部具有比第二腿部的宽度尺寸大的宽度尺寸。

公开(公告)号：US20150144228A1

公开(公告)日：2015-05-28

申请号：US14409061

申请日：2013-09-12

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： Takaaki Fukushi ,  Koichi Sato ,  Satoshi Kato ,  Hideki Hamatani ,  Yoshiaki Hirota

IPC分类号： C21D9/08 ,  B60B35/02 ,  C21D1/60 ,  C22C38/00 ,  C21D1/34

CPC分类号： C21D9/08 ,  B32B15/013 ,  B60B35/02 ,  B60B2360/102 ,  C21D1/18 ,  C21D1/34 ,  C21D1/60 ,  C21D9/0068 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C23C2/06 ,  C23C2/28 ,  C23C2/38

摘要： A quenched steel pipe member is formed of a GI galvanized steel pipe, in a middle section in a longitudinal direction of the GI galvanized steel pipe, a cross-section perpendicular to the longitudinal direction has a substantially V shape including a contact section at which opposite parts of an inner circumferential surface of the GI galvanized steel pipe come into contact with each other, the contact section is bonded using a Fe—Zn alloy phase, and a micro Vickers hardness at a location 50 μm deep from a base material surface layer is 95% or more of a micro Vickers hardness at a location 200 μm deep from the base material surface layer.

摘要翻译： 淬火钢管部件由GI镀锌钢管形成在GI镀锌钢管的纵向的中间部分中，与纵向方向垂直的横截面具有大致V形，包括相对的接触部分 GI镀锌钢管的内周面的部分彼此接触，接触部分使用Fe-Zn合金相接合，并且在距离基材表面层50μm深的位置的微维氏硬度为 在距离基材表面层200μm深的位置具有95％以上的微维氏硬度。

公开(公告)号：US10196702B2

公开(公告)日：2019-02-05

申请号：US15023564

申请日：2014-12-11

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Takaaki Fukushi ,  Hideki Hamatani ,  Masakazu Ozaki ,  Yuusuke Ichinose

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C21D9/08 ,  B23K11/00 ,  B23K13/00 ,  B23K11/08 ,  C21D8/10 ,  C21D9/50 ,  C22C38/00 ,  C22C38/58 ,  B23K11/087 ,  C22C38/08 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60 ,  B23K101/10 ,  B23K103/04 ,  B21C37/08

摘要： An electric resistance welded steel pipe for an oil well includes in terms of mass %: 0.02 to 0.14% of C, 0.05 to 0.50% of Si, 1.0 to 2.1% of Mn, 0.020% or less of P, 0.010% or less of S, 0.010 to 0.100% of Nb, 0.010 to 0.050% of Ti, 0.010 to 0.100% of Al, and 0.0100% or less of N. Contents of Cu, Ni, Cr, Mo, V, and B are 0 to 0.50%, 0 to 1.00%, 0 to 0.50%, 0 to 0.30%, 0 to 0.10%, and 0 to 0.0030%, respectively. Remainder consisting of Fe and unavoidable impurities. In a case that a full thickness specimen is subjected to a pipe axis direction tensile test, a tensile strength is 780 MPa or more, 0.2% proof stress/tensile strength is 0.80 or more, and 2% flow stress/tensile strength is from 0.85 to 0.98.

公开(公告)号：US10081042B2

公开(公告)日：2018-09-25

申请号：US14911601

申请日：2014-08-07

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： Hideki Hamatani ,  Kenichi Yamamoto ,  Masafumi Miyazaki ,  Masaki Ina ,  Takaaki Fukushi

IPC分类号： C22C38/26 ,  C22C38/02 ,  B21C37/08 ,  C22C38/00 ,  C22C38/14 ,  C22C38/58 ,  C21D8/10 ,  C22C38/04 ,  C22C38/12 ,  B22D11/00 ,  B23K11/087 ,  B23K11/34 ,  C21D9/14 ,  C22C33/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/16 ,  C22C38/24 ,  C22C38/28 ,  C21D9/08

CPC分类号： B21C37/08 ,  B22D11/001 ,  B23K11/0873 ,  B23K11/34 ,  C21D8/105 ,  C21D9/08 ,  C21D9/14 ,  C22C33/04 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/58

摘要： Electric resistance welded steel pipe excellent in weld zone quality suitable for oil country tubular goods and line pipe wherein steel plate forming the base metal of the electric resistance welded steel pipe has a predetermined chemical composition, the contents of Ca, O, S, Ce, La, and Al satisfy XCASO = ( Ca O + Ca S + 0.285 ⁢ Ce + La O + 0.285 ⁢ Ce + La S ) × ( Al Ca ) > 78 the oxide-based inclusions in the weld zone of the electric resistance welded steel pipe contains one or both of Ce and La, and the long axis/short axis of the oxide-based inclusions is 2.5 or less.

公开(公告)号：US09702019B2

公开(公告)日：2017-07-11

申请号：US14409061

申请日：2013-09-12

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： Takaaki Fukushi ,  Koichi Sato ,  Satoshi Kato ,  Hideki Hamatani ,  Yoshiaki Hirota

IPC分类号： C23C2/06 ,  C23C2/28 ,  C21D9/08 ,  C22C38/14 ,  B32B15/01 ,  C22C38/02 ,  C22C38/04 ,  C23C2/38 ,  B60B35/02 ,  C21D1/34 ,  C21D1/60 ,  C22C38/00 ,  C21D9/00 ,  C21D1/18

CPC分类号： C21D9/08 ,  B32B15/013 ,  B60B35/02 ,  B60B2360/102 ,  C21D1/18 ,  C21D1/34 ,  C21D1/60 ,  C21D9/0068 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  C23C2/06 ,  C23C2/28 ,  C23C2/38

摘要： A quenched steel pipe member is formed of a GI galvanized steel pipe, in a middle section in a longitudinal direction of the GI galvanized steel pipe, a cross-section perpendicular to the longitudinal direction has a substantially V shape including a contact section at which opposite parts of an inner circumferential surface of the GI galvanized steel pipe come into contact with each other, the contact section is bonded using a Fe—Zn alloy phase, and a micro Vickers hardness at a location 50 μm deep from a base material surface layer is 95% or more of a micro Vickers hardness at a location 200 μm deep from the base material surface layer.