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公开(公告)号：US20220168795A1
公开(公告)日：2022-06-02
申请号：US17434659
申请日：2020-02-21
IPC分类号： B21D41/02 , B21D26/041 , B21D26/043
摘要： A metal pipe having an outer diameter of 150 mm to 3,000 mm and a wall thickness of 2 mm to 50 mm, and a method for manufacturing the same. The method includes a pipe-end-portion expansion step of expanding pipe end portions that are located at both ends of a mother pipe and an internal pressure application step that is performed after the pipe-end-portion expansion step and in which the mother pipe is expanded by applying an internal pressure, p, to the entire interior of the mother pipe until the internal pressure, p (MPa), that corresponds to changes in an axial compression amount s (mm), the axial compression amount, s, representing an amount of compression in a pipe axial direction against pipe extreme ends which are the both ends of the mother pipe, becomes a preset maximum internal pressure pmax (MPa), and p and s satisfy a specified formula.
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2.发明申请公开(公告)号：US20190219218A1
公开(公告)日：2019-07-18
申请号：US16311831
申请日：2017-04-19
摘要： An electric-resistance-welded stainless clad steel pipe or tube that is excellent in both the fracture property of the weld and the corrosion resistance of the pipe or tube inner surface as electric resistance welded without additional welding treatment such as weld overlaying after electric resistance welding is provided. An electric-resistance-welded stainless clad steel pipe or tube comprises: an outer layer of carbon steel or low-alloy steel; and an inner layer of austenitic stainless steel having a predetermined chemical composition, wherein a flatness value h/D in a 90° flattening test in accordance with JIS G 3445 is less than 0.3, and a pipe or tube inner surface has no crack in a sulfuric acid-copper sulfate corrosion test in accordance with ASTM A262-13, Practice E, where h is a flattening crack height (mm), and D is a pipe or tube outer diameter (mm).
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公开(公告)号：US20240131632A1
公开(公告)日：2024-04-25
申请号：US18277837
申请日：2022-02-28
CPC分类号： B23K35/3073 , B23K9/167 , B23K35/004 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/38
摘要： A TIG welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the TIG welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.
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4.发明申请OPEN-PIPE WELD SHIELDING SYSTEM FOR ELECTRIC RESISTANCE WELDED STEEL PIPE OR TUBE 审中-公开用于电阻焊管钢管或管的开管焊接屏蔽系统公开(公告)号：US20160045974A1
公开(公告)日：2016-02-18
申请号：US14780147
申请日：2014-03-18
IPC分类号： B23K11/00 , B23K11/087 , B23K35/38
摘要： An open-pipe weld shielding arrangement for an electric resistance welded steel pipe or tube includes a shielding-gas blowing nozzle and a gas flow rate controller. The shielding-gas blowing nozzle includes a gas outlet disposed at a position 5 to 300 mm above upper ends of portions to be welded, and the gas flow rate controller controls the flow rate of the shielding gas blown from the gas outlet to 0.5 to 50 m/sec.
摘要翻译： 用于电阻焊钢管或管的开管焊接屏蔽装置包括屏蔽气体吹制喷嘴和气体流量控制器。 保护气体吹入喷嘴包括设置在待焊接部分上端上方5〜300mm的气体出口，气体流量控制器控制从气体出口吹出的保护气体的流量为0.5〜50 m / sec。
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公开(公告)号：US20240227088A9
公开(公告)日：2024-07-11
申请号：US18277837
申请日：2022-02-28
CPC分类号： B23K35/3073 , B23K9/167 , B23K35/004 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/38
摘要： A TIG welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the TIG welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.
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公开(公告)号：US20170369962A1
公开(公告)日：2017-12-28
申请号：US15539421
申请日：2015-12-15
发明人： Sota GOTO , Takatoshi OKABE , Yukihiko OKAZAKI
IPC分类号： C21D9/08 , C22C38/06 , C22C38/04 , C22C38/14 , C21D8/02 , B21B19/10 , C21D9/50 , C21D8/10 , B21C37/08 , C22C38/02
CPC分类号： C21D9/08 , B21B19/10 , B21C37/08 , C21D6/001 , C21D6/005 , C21D6/008 , C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D8/105 , C21D9/50 , C21D2211/002 , C21D2211/005 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/58
摘要： A high-strength high-toughness electric-resistance-welded steel pipe having high resistance to post-weld heat treatment is provided. The steel pipe having a composition including C: 0.01% to 0.12%, Si: 0.05% to 0.50%, Mn: 1.0% to 2.2%, P: 0.03% or less, S: 0.005% or less, Al: 0.001% to 0.10%, N: 0.006% or less, Nb: 0.010% to 0.100%, and Ti: 0.001% to 0.050%. The steel pipe having a structure composed of 90% or more by volume of a bainitic ferrite phase and 10% or less (including 0%) by volume of a second phase. The bainitic ferrite phase having an average grain size of 10 μm or less, and the structure containing fine Nb precipitates having a particle size of less than 20 nm dispersed in a base material portion. The steel pipe having high strength and toughness that is maintained through post-weld heat treatment, including heating to a temperature of 600° C. or more.
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7.发明公开公开(公告)号：US20240351147A1
公开(公告)日：2024-10-24
申请号：US18684238
申请日：2022-07-28
IPC分类号： B23K35/30 , B23K9/18 , B23K35/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58
CPC分类号： B23K35/3073 , B23K9/186 , B23K35/0261 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58
摘要： A metal-cored wire for submerged arc welding having a composition including, in mass %: C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 17.0 to 28.0%, P: 0.030% or less, S: 0.030% or less, Ni: 0.01 to 10.00%, Cr: 0.4 to 4.0%, Mo: 3.50 to 10.00%, B: 0.0010% or less, N: 0.200% or less, and the balance being Fe and incidental impurities.
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公开(公告)号：US20200224813A1
公开(公告)日：2020-07-16
申请号：US16830268
申请日：2020-03-26
IPC分类号： F16L58/08 , B21C37/08 , B21C51/00 , B23K20/227 , B23K11/087 , B23K11/34 , B23K11/16 , B23K20/02 , B23K20/04 , B23K13/08 , C22C38/58 , C22C38/44 , B23K11/00 , F16L9/16 , F16L9/18 , B23K11/08 , B23K13/02 , F16L9/17 , C22C38/12 , C22C38/40 , C22C38/20 , C22C38/24 , C22C38/48 , C22C38/22 , C22C38/42 , C22C38/00 , C22C38/18 , C22C38/02 , C22C38/06 , C22C38/26 , C22C38/50 , C22C38/38 , C22C38/08 , C22C38/46 , C22C38/04 , C22C38/14 , C22C38/28 , C22C38/16 , B32B15/04 , B32B15/01 , B32B15/00 , B32B1/08 , B32B15/18 , B23K31/02 , F16L9/02 , F16L57/02
摘要： An electric-resistance-welded stainless clad steel pipe or tube that is excellent in both the fracture property of the weld and the corrosion resistance of the pipe or tube inner surface as electric resistance welded without additional welding treatment such as weld overlaying after electric resistance welding is provided. An electric-resistance-welded stainless clad steel pipe or tube comprises: an outer layer of carbon steel or low-alloy steel; and an inner layer of austenitic stainless steel having a predetermined chemical composition, wherein a flatness value h/D in a 90° flattening test in accordance with JIS G 3445 is less than 0.3, and a pipe or tube inner surface has no crack in a sulfuric acid-copper sulfate corrosion test in accordance with ASTM A262-10, Practice E, where h is a flattening crack height (mm), and D is a pipe or tube outer diameter (mm).
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公开(公告)号：US20190184437A1
公开(公告)日：2019-06-20
申请号：US16331222
申请日：2017-08-31
摘要： Provided is a clad welded pipe or tube that has improved pipe or tube mechanical properties by reducing the width of a weld without its function as a clad pipe or tube being impaired. A clad welded pipe or tube comprises: a first layer made of base metal; and a second layer placed on one surface of the first layer, and made of first cladding metal that is a material different from the base metal, wherein a pipe or tube circumferential length L1 of weld metal at a pipe or tube inner surface and a pipe or tube circumferential length L2 of the weld metal at a pipe or tube outer surface in a weld are each 0.0010 mm or more and 1.0 mm or less, and the base metal is not exposed at a first cladding metal-side surface of the clad welded pipe or tube in the weld.
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10.发明申请HOT-ROLLED STEEL SHEET FOR HIGH STRENGTH LINEPIPE HAVING TENSILE STRENGTH OF 540 MPA OR MORE 审中-公开具有540 MPA或更高的拉伸强度的高强度钢板的热轧钢板公开(公告)号：US20150368737A1
公开(公告)日：2015-12-24
申请号：US14763476
申请日：2014-01-23
发明人： Sota GOTO , Shunsuke TOYODA , Takatoshi OKABE , Yukihiko OKAZAKI
IPC分类号： C21D9/46 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02
CPC分类号： C21D9/46 , C21D8/02 , C21D8/0205 , C21D8/0226 , C21D9/50 , C21D2211/002 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50
摘要： A hot-rolled steel sheet for a high strength linepipe having a tensile strength of 540 MPa or more and a method for making the same. The steel sheet having a chemical composition containing, by mass %, C: 0.02% or more and 0.06% or less, Si: 0.05% or more and 0.25% or less, Mn: 0.60% or more and 1.10% or less, P: 0.008% or less, S: 0.0010% or less, Nb: 0.020% or more and 0.060% or less, Ti: 0.001% or more and 0.020% or less, Al: 0.01% or more and 0.08% or less, Ca: 0.0005% or more and 0.0050% or less, one or more selected from among Cu: 0.50% or less, Ni: 0.50% or less, Cr: 0.50% or less, Mo: 0.50% or less, and V: 0.10% or less, and the balance being Fe and inevitable impurities, in which the relationships 0.60≦CP≦0.90 and CM≦3.05 are satisfied.
摘要翻译： 一种抗拉强度为540MPa以上的高强度线管的热轧钢板及其制造方法。 具有以质量％计含有C：0.02％以上且0.06％以下，Si：0.05％以上且0.25％以下，Mn：0.60％以上且1.10％以下的化学组成的钢板，P ：0.008％以下，S：0.0010％以下，Nb：0.020％以上且0.060％以下，Ti：0.001％以上且0.020％以下，Al：0.01％以上且0.08％以下，Ca ：0.0005％以上且0.0050％以下，Cu：0.50％以下，Ni：0.50％以下，Cr：0.50％以下，Mo：0.50％以下，V：0.10％以下的一种以上， 余量为Fe和不可避免的杂质，其中满足关系0.60＆nlE; CP＆nlE; 0.90和CM＆nlE; 3.05。
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