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1. 发明专利

JP2005034860A Welded titanium pipe and method for manufacturing it 有权
标题翻译：焊接钛管及其制造方法
公开(公告)号：JP2005034860A
公开(公告)日：2005-02-10
申请号：JP2003198496
申请日：2003-07-17
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAKAHASHI KAZUHIRO , HAYASHI TERUHIKO , HIROTA MICHIHISA , KAWAKAMI SATORU
IPC分类号： B23K9/23 , B23K9/235 , B23K101/06 , B23K103/14 , C21D1/74 , C21D1/76 , C22C14/00 , C23C8/12 , C23C8/24 , C23C8/34
摘要： PROBLEM TO BE SOLVED: To provide a welded titanium pipe and its manufacturing method by which fatigue property is improved while maintaining the formability in a weld zone and the production of fretting corrosion fatigue which is caused on the surface of a base material is suppressed.
SOLUTION: This is a welded titanium pipe in which the nitrogen content in the interior of the weld zone is higher than that in the interior of the base material by 0.003 - 0.030 mass% and which has titanium nitride on the surface of the base material part. The manufacturing method includes: forming a sheet or a strip into tubular shape after applying specified nitriding to the sheet or the strip-like titanium used for manufacturing the pipe by carrying out nitriding and heat treatment by heating it in a gaseous nitrogen atmosphere; and shielding the butted part with gaseous argon and carrying out welding. Furthermore, the heat treatment for mild nitriding or mild oxidation is carried out by heating the welded pipe in a gaseous nitrogen atmosphere or an oxidizing atmosphere.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种焊接钛管及其制造方法，其在维持焊接区域的成形性的同时提高疲劳特性，并且在基材的表面上产生微小的腐蚀疲劳的产生是抑制。
解决方案：这是一种焊接钛管，其中焊接区内部的氮含量高于基材内部的氮含量为0.003-0.030质量％，并且在其表面上具有氮化钛基材部分。该制造方法包括：通过在气态氮气气氛中进行氮化和热处理，对用于制造管材的片材或带状钛进行规定的氮化，形成片状或条状的管状; 并用气态氩屏蔽对接部分并进行焊接。此外，通过在气态氮气氛或氧化气氛中加热焊接管，进行温和氮化或轻度氧化的热处理。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2002194591A TITANIUM SHEET AND MANUFACTURING METHOD THEREFOR 失效
公开(公告)号：JP2002194591A
公开(公告)日：2002-07-10
申请号：JP2000388431
申请日：2000-12-21
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI KAZUHIRO , HAYASHI TERUHIKO , TAMENARI JUNICHI , ABE MITSUNORI , HIROTA MICHIHISA , TOKUNO KIYONORI , KIMURA KINICHI , SHINDO TAKATSUGU
IPC分类号： C25D11/26 , C22C14/00 , C23G1/10
摘要： PROBLEM TO BE SOLVED: To provide a titanium sheet, particularly a titanium sheet superior in formability such as press formability, and to provide a manufacturing method therefor. SOLUTION: This titanium sheet superior in the formability can maintain a lubricity with a die and a tool when being formed, without losing the formability of a raw material, and keeps scratch resistance against the die and the tool, by making a Vickers hardness at a load of 200 gf as 170 or less, and a thickness of an oxide film as 150 Å or more, on the surface of the titanium sheet. This method for obtaining the titanium sheet includes, removing adhered oil to the surface of the titanium sheet after cold rolling, annealing the sheet in a vacuum atmosphere or in an inert gas atmosphere, and then applying an anodic oxidation to provide an oxide film.

3. 发明专利

JP2002180236A TITANIUM THIN SHEET AND MANUFACTURING METHOD THEREFOR 失效
公开(公告)号：JP2002180236A
公开(公告)日：2002-06-26
申请号：JP2000381769
申请日：2000-12-15
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI KAZUHIRO , HAYASHI TERUHIKO , TAMENARI JUNICHI , ABE MITSUNORI , HIROTA MICHIHISA , TOKUNO KIYONORI , KIMURA KINICHI , SHINDO TAKATSUGU
IPC分类号： C22F1/18 , C22C14/00 , C22F1/00 , C22F1/02 , C23C8/24 , C23C8/28
摘要： PROBLEM TO BE SOLVED: To provide a titanium thin sheet, particularly a titanium thin sheet having excellent formability such as press formability, and also to provide its manufacturing method. SOLUTION: By regulating, on the surface of the titanium sheet, the Vickers hardness at a load of 50 gf and the Vickers hardness at a load of 200 gf to 180-280 and =250 Å, the titanium thin sheet having the following characteristics can be obtained, lubricity between a die or tool and a blank at forming can be maintained without deteriorating the formability of the blank, resistance to scratching by the die or tool can be secured and excellent formability can be provided. Such a titanium sheet can be obtained by applying a prescribed annealing treatment in an oxidizing/nitriding atmosphere after removing the surface of the titanium sheet having adhering oil after cold rolling, or applying prescribed annealing treatment in an oxidizing/nitriding atmosphere after annealing or after annealing/picking.

4. 发明专利

JP2011251340A Titanium welded pipe for fretting fatigue resistant member, and method for manufacturing the same 审中-公开
标题翻译：用于防冻耐热构件的钛管焊接管及其制造方法
公开(公告)号：JP2011251340A
公开(公告)日：2011-12-15
申请号：JP2011140699
申请日：2011-06-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAKAHASHI KAZUHIRO , HAYASHI TERUHIKO , HIROTA MICHIHISA , KAWAKAMI SATORU
IPC分类号： B23K9/23 , B23K9/025 , B23K9/167 , B23K9/235 , B23K10/02 , B23K26/20 , B23K26/32 , B23K103/14 , C22C14/00 , C22F1/00 , C22F1/18 , F16L9/00
摘要： PROBLEM TO BE SOLVED: To provide a titanium welded pipe for a fretting fatigue member which can improve fatigue properties while maintaining formability of welded parts and can suppress the occurrence of fretting fatigue that occurs on the surface of a base metal, and to provide a method for manufacturing the same.SOLUTION: The titanium welded pipe for the fretting fatigue resistant member has a higher nitrogen concentration by 0.003 to 0.030% by mass in the interior portion of the welded part than that in the interior part of the base metal, and has titanium nitride on the surface of the base metal on which a surface layer remains being unremoved after cold rolling. The method for manufacturing the titanium welded pipe includes: heating a titanium sheet or strip which is used in pipe-making and has the surface layer remaining unremoved after cold rolling, in a nitrogen gas atmosphere for nitriding heat treatment to perform predetermined nitriding; forming the sheet or strip into a tubular shape; shielding the abutted portion with an argon gas; and performing welding without use of a hot charge. The welded pipe may be heated in a nitrogen gas atmosphere or an oxidation atmosphere for light nitriding or light oxidation.
摘要翻译：要解决的问题：提供一种用于微动疲劳部件的钛焊管，其能够在保持焊接部件的成形性的同时提高疲劳特性，并且可以抑制在贱金属的表面上发生的微动疲劳的发生，并且提供其制造方法。解决方案：用于微动疲劳部件的钛焊管在焊接部分的内部部分中的氮浓度高于贱金属内部部分的氮浓度高0.003〜0.030质量％，并且具有氮化钛在表面层残留的贱金属表面在冷轧之后不被去除。制造钛焊管的方法包括：在用于氮化氮处理的氮气气氛中加热用于制管的钛片或带材，并且在氮化气体中冷轧后保持未被除去的表面层，进行预定的氮化处理; 将所述片或条形成为管状; 用氩气屏蔽邻接部分; 并且不使用热电荷进行焊接。焊管可以在氮气气氛或氧化气氛中进行加热，用于轻微氮化或轻微氧化。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2005296963A Welding method for making tube of metal having large springback 有权
标题翻译：用于制造具有大的弹簧的金属管的焊接方法
公开(公告)号：JP2005296963A
公开(公告)日：2005-10-27
申请号：JP2004112779
申请日：2004-04-07
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HAYASHI TERUHIKO , HIROTA MICHIHISA , TAKAHASHI KAZUHIRO , OTANI TADAYUKI , INOUE HIROSHIGE
IPC分类号： B23K9/23 , B21C37/08 , B23K9/025 , B23K101/06
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method by which tube-making by high-speed welding is made possible by preventing the generation of fine crack on the surface of weld bead on the inside surface of a tube when making the tube of metal having large springback by continuous welding.
SOLUTION: In the case the tube is continuously made by performing the butt welding of both end faces of a hoop by using squeezing rolls while rounding a belt-like hoop of the metal having large springback into a cylindrical shape by roll forming, first, continuous tack welding is performed by using a first welding torch in the vicinity of a squeezing point under the heat-input conditions that penetration bead is not formed and, successively, normal welding is performed by using the second welding torch from above the tack-welding part under the heat-input conditions that the penetration bead is formed on the downstream side of the position where the solidification of the tack-welding part is completed. Further, following the normal welding, a decorative build-up welding is performed from above the bead of the normal welding by using the third welding torch or, as necessary, the fourth welding torch.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种制造方法，通过在制造管时，通过防止在管的内表面上的焊道表面上产生微细裂缝，通过高速焊接进行管制的金属通过连续焊接具有较大的回弹。解决方案：在通过使用挤压辊进行环箍的两个端面的对接连续地连续制造管的情况下，通过辊轧成型将具有大回弹的金属的带状箍环四舍五入为圆柱形，首先，在没有形成贯通珠的热输入条件下，通过使用在挤压点附近的第一焊炬进行连续定位焊接，并且依次使用来自上方的第二焊炬进行普通焊接 - 在热输入条件下的焊接部分，其中在焊接部分的凝固完成的位置的下游侧形成有贯通珠。此外，在正常焊接之后，通过使用第三焊炬或必要时第四焊炬从正常焊接的焊道的上方进行装饰积聚焊接。版权所有（C）2006，JPO＆NCIPI

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